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Home My WebLink AboutRCC AGENDA PK 1999/03/29 -, - ~~f? -..- "- -~~ '~~ cnv OF CHUlA VISTA Depart:rn.en:t of Planning and Bu.ilding Date: March 24, 1999 To: Resource Conservation Commission Members From: Marilyn Ponseggi, Environmental Consultant Subject: Mitigated Negative Declaration for Olympic Parkway Extension If you need another copy of the Mitigated Negative Declaration for the Olympic Parkway Extension please call us by Friday, March 26, 1999 at the latest. Thank you. Mitigated Negi'ive Declaration- - PROJECT NAME: Olympic Parkway Extension PROJECT LOCATION: From the eastern boundary of Sunbow property to a point about one mile east of proposed SR-125. ASSESSOR'S PARCEL NO.: VariOllS - PROJECT APPLICANT: City of Chula Vista - Engineering Division CASE NO: IS-99- 20 DATE: February 15, 1999 A. Project Setting The proposed Olympic Parkway is located in an area of the City of Chula Vista known as the "Eastern Territories". The roadway will be an extension of East Orange Avenue, which currently extends from 1-805 in an easterly direction and terminates at Brandywine i Avenue. This portion of the roadway presently operates as a four-lane major street with bike lanes on both sides from 1-805 to Oleander A venue. East of Oleander A venue, it is a two-lane roadway with improvement along the avenue. The project area is partially ~ ~ developed area of the City. There are several large land holdings, all of which are proposed or approved for development. The preliminary design plans call for the roadway to basically follow the Poggi Canyon. The roadway will steadily climb from Sunbow approximately 20-30 feet above the existing elevation. Several biota studies have been prepared depicting the vegetation found within the roadway corridor. B. Proiect Description Roadway The proposed project consists of the extension of Olympic Parkway (Orange A venue) from the eastern boundary of the Sun bow property to a point about one mile east of SR-125. Olympic Parkway is a 5-mile lon~ roadway which will provide access to 1-805 and State Route 125 (SR 125) from the proposed development areas of the Eastern Territories of Chula Vista. This portion of the Olympic Parkway extension traverses the planned communities of Sun bow , Otay Ranch, McMillan-Otay Ranch, New Millennium and Eastlake. Olympic Parkway is currently classified by the Chula Vista General Plan Circulation Element as a six-lane prime arterial east of 1-805 to the proposed SR-125. (H:\llame\llmDmglmvlfon'u..oIy-pkwy .ND.doc) ~{lt- ==-'~-: .. ~- ~ city of chula vista planning department -~ ~ 01Y OF environmental review section mUlA VISTA - - Drainage Plan In order to accommodate the runoff that currently runs through Poggi Canyon, as well as additional runoff from future development, the road extension plan includes a drainage system consisting of an earthen channel with drop structures and a detention facility. The minimum depth of the channel is 12 feet, and the bottom width of the channel varies between 30 and 50 feet. Side slopes are proposed at 3:1 in accordance with the City's design criteria. A buffer and a 10-foot wide maintenance trail are also proposed. -. A smaller temporary channel is proposed for the northern side of the road. At the time the southern side of the road is graded for future development, the temporary channel will be removed and the finished grading will match the northern side of the road. The temporary channel will have drop structures and erosion control1andscaping. No native revegetation is planned for the temporary channel. Drop Strodores There are 25 drop structures and one culvert on the secondary channel. The main channel has fewer drop structures than the secondary channel since the main channel will have a detention basin in addition to a revegetation area that is currently under construction. Most . of the drop structures are 9 feet tall with the same three to one side slopes. The entire drop structure is riprap lined to protect from erosion and to minimi7.e velocities. Detention Basin A large detention basis is also proposed which will accommodate the increased flow rates associated with increased impermeability of the watershed when developed through build- out. The proposed channel design will ensure that the 100-year post-development flood flow exiting the project area is kept to a level that is at or below the 1DO-year pre- development flows. Because the berm height is less than 25 feet and the basin capacity is less than 50 acre-feet, the detention basin does not qualify as a dam according to State dam criteria. Utilities The proposed project includes the placement of utilities within the Olympic Parkway right- of-way. Wet utilities include the Poggi Canyon sewer and potable water and reclaimed water lines. The Poggi Canyon sewer will consist of an IS-inch sewer lined and associated manholes. Potable water facilities consist of an Otay Water District 16-inch potable water line as well as the relocation of a 54-inch City of San Diego potable water line from Paseo Ranchero to La Media. The reclaimed water lines consist of a 16-inch line from Brandywine to La Media, and an IS-inch line from La Media to Eastlake Parkway. (H;~\onV11'Oll~.ND.doc) Page2 - - Borrow Area About 4.7 million cubic yards of cut and fill will be required for project implementation. Fill material required for the project will be derived from five borrow areas within the Otay Ranch property, as well as from Eastlake. The borrow areas will be excavated in accordance with the existing approved development plans for the Otay Ranch, McMillian and East1ake developments; however, rather than exporting the excess material to an undisclosed location off-site, the fill material that is excavated from these properties will be utilized for the Olympic Parkway construction. With the exception of borrow area one, these areas are void of any sensitive wetland or upland habitat. Borrow area one contains 7.14 acres of coastal sage scrub and 0.87 acres of maritime chaparral. Proiect ~ Olympic Parkway will be constructed in the following four phases: Phase I (by the year 2000) includes grading the alignment from Brandywine to SR-U5, constructing the Poggi Canyon Sewer from Brandywine to SR-125, constructing the water main from Eastlake Parkway to E. Palomar Street, and constructing roadway improvements from Brandywine to Paseo Ranchero. Phase n (by the year 2002) involves the construction of roadway improvements from Paseo Ranchero to E. Palomar Street. Phase m (by the year 2005) includes constructing roadway improvements from E. Palomar Street to Eastlake Parkway and grading thet alignment from SR -125 to Eastlake Parkway. Phase IV (by the 2005) comprises of grading from Eastlake Parkway to Hunte Parkway and constructing ultimate roadway improvements from Eastlake Parkway to Hunte Parkway. Project Permits Required 1. Section 404 permit. Under the Section 404 of the Clean Water Act, placement of dredged or fill material within waters of the U. S. requires a permit issued by the U.S. Army Corps of Engineers. 2. Section 401 Certification or Waiver. The Clean Water Act also requires the issuance of a state water quality certification or waiver under Section 401 to be issued by the Regional Water Quality Control Board for any action that may result in degradation of the waters of the State. (M: IiIDmc1JiaImmglenYlTOll\is-Oly-ltwy .ND.doc) Pogc3 - - 3. Section 1603 Agreement. In addition to the federal act requirements, the proposed project constitutes an alteration of a streambed and falls under the jurisdiction of the California Department of Fish and Game pursuant to Section 1600 et seq. of the California Fish and Game Code. ~ Responsible Agencies U. S Fish and Wildlife Service U. S. Army Corps of Engineers Regional Water Quality Control Board (NPDES) Trustee Agencies California Department of Fish and Game C. Compatibility with Zoninl! and Plans The Olympic Parkway extension project traverses and is consistent with the ciruculation plans of several Planned Communities for which environmental impact reports have also been prepared. The project is also consistent with the Circulation Element of the City of Chula Vista General Plan. D. Identification of Environmental Effects An Initial Study conducted by the City of Chula Vista (including an attached Environmental Checklist Form) determined that the proposed project will not have a significant environmental effect, and the preparation of an Environmental Impact Report will not be required. This Mitigated Negative Declaration has been prepared in accordance with Section 15070 of the State CEQA Guidelines. A discussion of these potentially significant impacts from the proposed project is found in Exhibit" A" as attached. E. Mitigation is found in Exhibit "A" as attached. (H:~g"""""""~.ND.doc) Page4 - - F. Consultation 1. Individuals and Organizations City of Chula Vista: Benjamin Guerrero, Planning Doug Reid, Planning Marilyn Ponseggi, Environmental Consultant Alex Al-Agha, Engineering Cliff Swanson, Engineering Garry Williams, Planning Brad Kemp, Assist. Director of Building Robert Cunningham, Fire Marshal Stephen Preuss, Crime Prevention Joe Gamble, Planning!Landscape Planning Ann Moor~, Assistant City Attorney Chula Vista City School District: Dr. Lowell Billings Sweetwater Union High School District: Katy Wright Applicant's Agent: Cliff Swanson, Engineering 2. Documents Chula Vista General Plan (1989) and EIR (1989) Title 19, Chula Vista Municipal Code Biota Survey, Merkel & Associates, Inc. (February, 1999) 3. Initial Study This environmental determination is based on the attached Initial Study, any comments received on the Initial Study and any comments received during the public review period for this Mitigated Negative Declaration. The report reflects the independent judgement of the City of Chula Vista. Further information regarding the environmental review of this project is available from the Chula Vista Planning Department, 276 Fourth Avenue, Chula Vista, CA 91910. ~óiJL/ ENVlRO NTAL REVIEW COORDINATOR EN 6 (Rev. 5/93) (H:\bøme'4pIaDmJIs\CIIYll"OllIls-Øly-i*W)'.NU.doc) PageS .- - EXHIBIT A OLYMPIC PARKWAY INITIAL STUDY .. FEBRUARY 1999 Prepared for: Marilyn Ponseggi City of Chula Vista 276 Fourth Avenue Chula Vista, California 91910 Prepared by: Cotton/Beland/ Associates, Inc. 6336 Greenwich Drive, Suite F San Diego, California 92122 - - TABLE OF CONTENTS IN1'R.ODUCTION .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . I PROJECT LOCATION ......................................................... I BACKGROlJND . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 ~O~ALSE~G.. .... ......... .... .... ......... .................. I PROJECT DESCRIPTION ...................................................... 2 PROJECT PHASING .......................................................... 4 PROJECT APPROVALS ....................................................... 4 LEAD, RESPONSffiLE AND TRUSTEE AGENCIES ......................... . . . . . . . 5 ENVIRO~AL CHECKLIST FORM RESPONSES. ........................... .23 1. Land Use and Planninp; ............................................... 23 II. '. , Population and Housing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26 ill. Geophysical. . . . . .. . . . . . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . .27 IV. Water ............................................................. 30 V. Air Quality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35 VI. T~rtation/CITculation.............. ..... .., ..... .......... ..... ...37 VII. Biological Resources. . . . , . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38 VIII. Energy and Mineral Resources ......................................... 46 IX. Hazards ........................................................... 47 X. Noise ............................................................. 48 XI. Public Services . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50 XII. 1'bresholds .......................................................... 51 XIII. Utilities and Service Systems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53 XIV. Aesthetics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54 XV. Cultural Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56 XVI. Paleontological Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58 XVII. Recreation ......................................................... 59 XVIII. Mandatory Findings of Significance ..................................... 59 XIX. Project Revisions or Mitigation Measures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61 XX. Agreementto Implement Mitigation Measures. . . . . . . . . . . . . . . . . . . . . . . . . . . . .61 XXI. Environmental Factors Potentially Affected ............................... 61 XXII. Determination ...................................................... 62 REFERENCES A TIACHMENT A: Mitigation Measures ATI ACHMENT B: Biology Exhibits - Wetland Planting Section ATIACHMENT C: Wetland Delineation Olympic Parlcway City ofChula Vista Initial Study i February ]999 _. -, LIST OF TABLES Table 1 Upland Habitat Impacts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41 Tab1e2 Wetland Impact Acreage and Proposed Mitigation. ... . . . . . . . . . . . . . . . . . . .42 LIST OF FIGURES -. Figure 1 Project Location USGS ............................................. 6 Figure 2 Project Location . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7 Figure 3 Grading Plan Key Map. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8 Figure 4 Olympic Parkway Typical Sections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 Figure 5 Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 Figure 6 Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 Figure 7 . Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12 Figure 8 Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Figure 9 Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 Figure 10 Grading Plan: Olympic Parkway. . . . . . . . . . . . . . . . .. . . . . . . .. . . . . . . . . . . .15 Figure 11 Grading Plan: Olympic Parkway . . .. . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . . . . 16 Figure 12 Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . -. . . . . . . . . . . . . . . . . . . . . . 17 Figure 13 Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 Figure 14 Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 Figure 15 Grading Plan: Olympic Parkway . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 Figure 16 Proposed Borrow Areas . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Figure 17 Borrow Area (1) Upland Habitat . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Olympic Parkway City ofChula Vista Initial Study ii February J 999 - - OLYMPIC PARKWAY INITIAL STUDY INTRODUCTION This initial study identifies the potential environmental impacts and mitigation measures associated with the construction and operation of the Olympic Parkway in the City ofChula Vista. This initial study also provides a summary of the conclusions and mitigation measures contained in previous Environmental Impact Reports (EIRs) for the Sunbow General Development Plan (EIR 88-01), Otay Ranch General Development Plan (EIR 90-01), Otay Ranch Sectional Planning Area (SPA) One Plan (EIR 95-01), and the Eastlake Greensrrrails Replanning Program SEIR (EIR 97-04) as they relate to the construction of Olympic Parkway. The environmental impacts associated with the construction and operation of the proposed roadway have been addressed in these previous EIRs; however, the environmental impacts associated with the construction and operation of the entire roadway have not been addressed as a stand alone project. This initial study brings together the environmental analyses provided in the previous EIRs in order to provide a comprehensive analysis of1he proposed roadway's environmental impacts. PROJECT LOCATION The project site is located in the City of Chula Vista, in southwestern San Diego County. The Olympic Parkway will ultimately extend from I-80S to the Olympic Training Center. Olympic Parkway cmrentlyterminates at Brandywine A venue. The roadway project extends eastward through Otay Ranch and Eastlake and terminates at Hunte Parkway. The project site is located within Sections 17 and 18, Range 1 West, Township 18 South of the USGS 7.5' Imperial Beach Quadrangle. The project also extends into unsectioned lands, Range I West, Township 18 South of the Jamul Mountain Quadrangle; and unsectioned lands, Range 1 West, Township 18 South of the National City Quadrangle. Figure I depicts the project site location on these USGS Quadrangles. BACKGROUND Kimley-Horn and Associates (KHA) has completed an engineering feasibility study for the City of Chula Vista to construct Olympic Parkway. The feasibility study identified project constraints in terms of funding, traffic needs, timing, phasing and environmental requirements. Future detailed construction plans and specifications will be prepared based on the alignment identified in the feasibility study. ENVIRONMENTAL SETTING The proposed Olympic Parkway is located in an area of the City of Chula Vista known as the "Eastern Territories." Figure 2 depicts the location of the proposed project in relation to surrounding roadways. The roadway will be an extension of East Orange A venue, which currently runs from 1- 805 eastward and terminates at Brandywine A venue. This portion of the roadway presently operates as a four-lane major street with bike lanes on both sides from I-80S to Oleander Avenue. East of Oleander A venue, it is a two-lane roadway with improvement along the avenue. On-street parking Olympic Parkway City of Chula Vista Initial Study 1 February 1999 - - is prohibited. The posted speed limit is 35 mph east of Oleander Avenue. The project area is a partially developed area of the City, east of Interstate 805 (I-805), which is comprised of several large vacant land holdings, all of which are proposed or approved for development. PROJECT DESCRIPTION Roadway The proposed project consists of the extension of Olympic Parkway (Orange Avenue) from the eastern boundary of the Sunbow property to a point approximately one mile east of SR-125. Olympic Parkway is a five-mile long roadway which will provide dir~ access to I-80S and State Route 125 (SR-125) from the proposed development areas of the Eastern Tenitories of Chula Vista. This portion of the Olympic Parkway extension traverses Sunbow, Otay Ranch, McMillan-Otay Ranch, New Millennium and Eastlake. Olympic Parkway is currently classified by the. Chula Vista General Plan Circulation Element as a six-lane prime arterial east ofI-805 to the proposed SR-125. The pre11minary design plans for Olympic Parkway call for the roadway to basically follow Poggi Canyon. The entire alignment will be constructed predominately on :fill which ranges from 0 to as much as 50 feet in depth, and the roadway will be elevated above the existing ground, except at the Sunbow development. It will steadily climb from Sunbow and typically be approximately 20-30 feet above thè.existing elevation. The maximum elevation is at the Palomar crossing where the elevation will be approximately 60 feet above the current elevation of Poggi Canyon. While the source offill material is not restricted by design, several upland borrow areas have been identified within the Otay Ranch and McMillan properties along the roadway alignment. Figure 3 depicts the Grading Plan Key Map for the project. Figure 4 depicts the typical sections of the proposed parkway. Figures 5 through 15 depict the proposed alignment and grading plan for the parkway on a 200 scale topographic base. These figures also depict the existing vegetation within the study conidor based on biological studies for related planned community projects within the corridor as well as an updated wetlands delineation. Drainage Plan In order to accommodate the runoff that currently runs through Poggi Canyon, as well as additional runoff from future development, the road extension plan includes a drainage system consisting of an earthen channel with drop structures and a detention facility. The drainage system will be similar to the existing detention facilities that were created for the Telegraph Canyon channel located to the north of the project site adjacent to Telegraph Canyon Road. Between the eastern end of the project and approximately half way between La Media and Paseo Ranchero the channel will be on the north side of the roadway. For this portion of the roadway, a smaller temporary channel is proposed for the southern side of the road. The temporary channel will be at the base of the slope that will be created by the roadway grading. At the time the southern side of the road is graded for future development, the temporary channel will be removed and the finished grading will match the northern side of the road. The temporary channel will have drop structures and erosion control landscaping. No native revegetation is planned for the temporary channel. Aprroximately halfway between La Media and Paseo Ranchero the channel will cross under the road to the southern side of the road. The minimum depth of the main channel is 12 feet, and the bottom width of the channel varies between 25 feet at the east end and widening to 50 feet at the west end Olympic Parkway City ofChu/a Vista Initial Study 2 February 1999 .- - - where it enters the detention basin. Side slopes are proposed at 3:1 in accordance with the City's design criteria. A five foot buffer and a 10-foot wide maintenance trail are also proposed. Drop Structures There are up to 25 drop structures and one culvert on the secondary channel. The main channel has fewer drop structures, a detention basin in addition to a revegetation area that is currently under cons1rUction. The drop structures will vary in height up to are nine feet tall with the same three to one side slopes. The width of the top of the drop structures will be up to 54 feet wider than the bottom. The slope of the face of the drop structure is 2: 1. The entire drop structure is riprap lined to protect from erosion and to minimize velocities. Detention Basin A large detention basis is also proposed which will accommodate the increased flow rates associated with increased impermeability of the watershed when developed through build-out. The proposed channel design will ensure that the 1 OO-year post-development flood flow exiting the project area is kept to a level that is at or below the 1 DO-year pre-development flows. Because the berm height is less. than 25 feet and the basin capacity is less than 50 acre-feet, the detention basin does not qualify as a dam according to State dam criteria. Utilities' . The proposed project includes thep1acement of utilities within the Olympic Parkway right-of-way. Wet utilities include the Poggi Canyon sewer and potable water and reclaimed water lines. The Poggi Canyon sewer will consist of an I8-inch sewer line and associated manholes. Potable water facilities consist of an Otay Water District 16-inch potable water line as well as the relocation of a 54-inch City of San Diego potable water line from Paseo Ranchero to La Media. The reclaimed water lines consist of a 16-inch line from Brandywine to La Media, and an I8-inch line from La Media to Eastlake Parkway. As presently planned, the roadway would be constructed coincident with the development of the adjacent lands to the greatest extent possible. However, where adjacent developments are not proceeding along a coincident schedule, the roadway would be constructed as a fully stand alone action. Funding for this portion of the roadway is through Transportation Development Impact Fees, Sewer Development Impact Fees, Otay Water District and City of San Diego CIP funding (utilities), and developer financing. Borrow Areas Approximately 4.7 million cubic yards of cut and fill will be required for project implementation. Fill material required for the project will be derived from five borrow areas within the Dtay Ranch property, as well as from Eastlake. The borrow areas will be excavated in accordance with the existing approved development plans for the Otay Ranch, McMillan-Otay Ranch and Eastlake developments; however, rather than exporting the excess material to an undisclosed location off-site, the fill material that is excavated from these properties will be utilized for the Olympic Parkway construction. Figure 16 depicts the locations of the five borrow areas. The size of the borrow areas are as follows: Borrow Area (1) 76.32 acres; Borrow Area (2) 33.50 acres; Borrow Area (3) 32.50 acres; Borrow Olympic Parlcway City ofChula Vista Initial Study 3 February 1999 -- - Area (4) 56.82 acres; and Borrow Area (5) 7.40 acres. With the exception of Borrow Area (1), these areas are void of any sensitive wetland or upland habitat. Borrow Area (1) contains 7.14 acres of coastal sage scrub and 0.87 acres of maritime chaparral. Figure 17 depicts the habitat located within Borrow Area (1). PROJECT PHASING The roadway was originally anticipated to be constructed over a 10-15 year period. As planned development adjacent to the proposed roadway alignment ensued each developer would be responsible for their portion of the improvement. However, additional development approvals in the Eastern Territories have triggered the need for more immediate improvement of Olympic Parkway per development thresholds (i.e., number of dwelling units and/or commercial and industrial acreage to be developed) established by the City's Eastern Chula Vista Transportation Phasing Plan (ECVTPP) and the Growth Management Plan. Olympic Parkway will be constructed in the following four phases: . Phase I (by the year 2000) includes grading the alignment from Brandywine to SR-125, constructing the Poggi Canyon Sewer from Brandywine to SR-125, constructing the water main from Eastlake Parkway to E. Palomar Street, and constructing roadway improvements from Brandywine to Paseo Ranchero. Phase H (by the year 2001) involves the construction of roadway improvements from Paseo Ranchero to E. Palomar Street. Phase m (by the year 2003) includes constructing roadway improvements from E. Palomar Street to Eastlake Parkway and grading the alignment from SR-125 to Eastlake Parkway. Phase W (by the year 2004) comprises of grading from Eastlake Parkway to Hunte Parkway and constructing ultimate roadway improvements from Eastlake Parkway to Hunte Parkway. PROJECT APPROVALS As indicated in Section IV. Biological Resources of this initial study, the project will result in impacts to water and/or streambeds that fall under both state and federal regulatory programs. The following permits are required for project implementation: 1. . Mitigated Negative Declaration. The City of Chula Vista will issue and provide public notice of a Mitigated Negative Declaration in accordance with Sections 15070 and 15072 of the CalifomiaEnvironmental Quality Act (CEQA). 2. Section 404 Permit. Under Section 404 of the Clean Water Act, placement of dredged or fill material within Waters of the U.S. requires a permit issued by the U.S. Army Corps of Engineers. 3. Section 401 Certification or Waiver. The Clean Water Act also requires the issuance of a state water quality certification or waiver under Section 401 to be issued by the Regional Olympic Parkway City of Chula Vista Initial Study 4 February 1999 - - Water Quality Control Board for any action that may result in degradation of the water of the State. 4. Section 1603 Agreement. In addition to the federal act requirements, the proposed project constitutes an alteration of a streambed and falls under the jurisdiction of the California Department ofFish and Game pursuant to Section 1600 et seq. of the California Fish and Game Code. LEAD, RESPONSIBLE AND TRUSTEE AGENCIES Lead Agency In conformance with Section 15050 and 15367 of the CEQA Guidelines, the City ofChula Vista will be the "lead agency" which is defined as the "public agency which has the principal responsibility for carrying out or approving a project." Possible Responsibleffrustee Agencies Responsible Agencies are those agencies which have a discretionary approval over one or more actions involved with development of the project site. Trustee Agencies are state agencies having discretionary approval or jurisdiction by law over natural resources affected by a project. These agencies may include, but are not limited to the following: Responsible Agencies U.S. Fish and Wùdlife Service U.S. Army Corps of Engineers Regional Water Quality Control Board (NPDES) Trustee Agencies California Department of Fish and Game Olympic Parlcway City of Chula Vista Initial Study 5 February] 999 - ~~((U/" \j/I;!':~;';":'~: :,' (/'V/v,/~: ..~:)~I{· '.. .'/ '. i ¡' , .,,d' . 11: .:~ .:f,. - \ if. T""" _ !!! . \., -.... ~ , ," i ¡, t" . '\ a.....&. ~ ' \ ,'-' ') Î i: ; -~ -'. ........... , m en . ',,, -.. ¡::"; . .' ~ . ., \! Q) ;:> ì f-_/' , ¡ .., ,,".".... .' . I.- -== :, ) ¡, ," ,.¡: . .c::: ell --L.__~,.,...:"¡:\ -,.!'-.. .,'_.. :J _ \ " . .... . 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'E - >. as ~ ~ 0 ~ 's. ~~ ~õ 21 - - . {j!r-;::?~~ ta - - '-".--:: ~ '" \ - () ~.l:i...:.::: > '-' () ~ æ ta .~ ~ ::r: ~ -ª ~ u. ~].š, u c..... 0 o ~ ~ >. - t:: õ.._ û ~ Æ~o \ \ \ ð < \ .~ / /' / // ,- \~NCb 50N .1' - .. c;.~ ":d >. "ö =' :s \ ... ... tI) ~~~ It! ~~ ë; ',p 111):3 ~. 'S - · 0 ca CD ~ _ N o · -:. 0 g\ 0 :I - . ] . - '" \;;; 1-0 (Ù ~ 0 (8 os.. ~ C Co) 2 ~ Õ 22 - - Case No. 18-97-04 E~ONMENTALCHECKLISTFORM 1. Name of Proponent: City of Chula Vista 2. Lead Agency Name and Address: City of Chula Vista 276 Fourth Avenue Chula Vista, CA 91910 -. 3. Address and Phone Number of Proponent: same as above 4. Name of Proposal: Olympic Parkway 5. Date of Checklist: February 1999 Poteoûally Poteatially Significant Leu than Significant Unl.... Significant No Impact Mitigated Impact Impact I. LAND USE AND PLANNING. Would the proposal: a) Conflict with general plan designation or 0 0 0 181 zoning? b) Conflict with applicable environmental plans or 0 181 0 0 policies adopted by agencies with jurisdiction over the project? c) Affect agricultural resources or operations (e.g., 0 0 181 0 impacts to soils or farmlands, or impacts from incompatible land uses)? d) Disrupt or divide the physical arrangement of an 0 0 0 181 established community (including a low-income or minority community)? Comments: Response to Ia. The proposed project is a circulation element roadway as identified in the City's General Plan. The alignment of the project is consistent with the conceptual alignment depicted in each of the approved/proposed Sectional Planning Area plans transected by the roadway, as such, the project will not conflict with any general plan designations or zoning. Any grading associated with the borrow areas win be conducted in accordance with existing approved development plans. Page 23 --- - Potentially Potentially Sipificant Leu th.n Sipifiant Unl... Sipifocant No Imp." Miüg.ted Imp." Imp... Sunbow The general roadway alignment is depicted on Figure 4-4 Proposed Grading Plan of the Sunbow EIR (EIR 88-1) and subsequent figures within the document. No specific land use impact as it relates to the construction and operation of Olympic Parkway was identified., and no mitigation measures were required. Otay Ranch SPA One and Otay Ranch GDP ~ The general roadway alignment is depicted on Figures 2-5 and 2-9 Proposed Land Use Plans of the Otay Ranch SPA One EIR (95-01), and on Figure 2.3-1 of the Otay Ranch GDP EIR (90-01)(New Town Plan) and subsequent figures within these documents. No specific land use impact as it relates to the construction and operation of Olympic Parkway was identified, and no mitigation measures were required. EostJake Greens/I'rails Re-PÚlnning Program SEIR _ The general roiiiilignment is depicted on Figure 3-3 of the Eastlake Greensrrrails Re-Planning Program SEIR and subsequent figures within the document. No specific land use impact as it relates to the construction and operation of Olympic Parkway was identified., and no mitigation measures ,were required. Response to lb. The proposed project could conflict with environmental plans and policies adopted by agencies with jurisdiction over the project. With the exception of the Sunbow property, the property is subject to the City's Multiple Species Conservation Plan (MSCP). The MSCP is a regional habitat conservation plan and State-level Natural Communities Conservation Plan (NCCP) covering south San Diego County, including portions of the Otay Ranch, the Eastlake planning area, and the remaining jurisdictional area of Chula Vista. The City's MSCP is a plan and process for the local issuance of permits under the federal and state Endangered Species Acts for impacts to threatened and endangered species. The City ofChula Vista's MSCP has not been adopted at this time. The proposed project will also result in impacts to jurisdictional wetlands and sensitive upland habitats, and will require permits from appropriate state and federal agencies for impacts to these resources (refer to Section VII Biological Resources of this document). Page 24 - - PotentiaIly PotenÛ811y Sipificant Leu tbn Significant UBI... Significant No Impact Mllipted Impact Impact Sunbow The Sunbow EIR (88-1) does not address the relationship between the Sunbow project and the MSCP effort, as the Sunbow project was approved before MSCP planning efforts were initiated. A portion of the proposed roadway located within the Sunbow GDP area is; however, located within the boundaries of the Multiple Habitat Planning Area. The City's draft sub-area plan does address Olympic Parkway in this alignment and therefore, the project does conflict with the goals of the MSCP. Additionally, implementation of mitigation measures proposed within the Sunbow EIR (88-1) which address impacts to biological resouœes would also reduce the impact of any conflicts between the project and policies of the MSCP to a less than significant level. As discussed in Section VII of this document, all permits and mitigation plans for the Sunbow project, (including the portion of Olympic Parkway that traverses the Sunbow property) have been obtained. Otay Ranch Approximately 11.000 acres of the 23,000 acre Otay Ranch are located within the Otay Ranch Preserve and the Multiple Species Conservation Program (MSCP) Study Area. The majority of the proposed roadway is located within the planning areas for the Otay Ranch General Development Plan (GDP) and is covered by the Resource Management Plan. While the GDP, which applies to the Otay Ranch portion of the project, contains policy language to ensure consistency with the MSCP (i.e., that "preservation and restoration activities shall be consistent with guidelines of any applicableregionaJ open space/resource protection program and shall resuh in equal or greater overall habitat values than occur under existing conditions"), the potential exists for the proposed project to impact areas designated as part of the regional preserve system established by the MSCP. For instance, grading associated with construction of the proposed roadway may potentially impact sensitive plant and animal species identified under the MSCP. A detailed discussion of biological impacts anticipated from the proposed project is provided in Section VII. Biological Resources of this document The majority of sensitive habit occurs within the Otay Ranch portion of the proposed alignment and borrow area (1). Implementation of the Otay Ranch Resource Management Plan and the mitigation measures proposed in the Otay Ranch GDP EIR (90- 01) SPA One EIR (95-0 I) and the modifications approved by the Chula Vista City Council on November 10, 1998 by Resolution #19254 will reduce the significance of impacts such that the project meets the conservation standards contained in the MSCP. EastIake While a portion of the Eastlake planning area is located within the City's MSCP, no impact related to compliance with the MSCP or other jurisdictional plans for the construction or operation of 01_ Parkway was identified. As indicated in the Eastlake Greens/rrails Re-Planning Program EIR , the Eastlake Trails property and the "Land Swap" are located outside the MHPA boundaries. Additionally, no sensitive biological resources will be impacted in this portion of the alignment. Page 25 - - Potentially Potentially Siplficant Leu than SiplflCllllt Vnl... Significant No Impact Mitigated Impact Impact Response to Ie. The proposed project will traverse a corridor that is not utilized for intensive agriculture, or the production of agricultural crops. The area has been utilized for dry farming and grazing in past; however, the area that will be impacted by the proposed project has not been under cultivation in the recent past. Sunbow The portion of the alignment that traverses the Sunbow property is currently under development, and is not utilized for agricultural operations. Agriculture was not addressed in the Sunbow EIR (88-1). Otay Ranch The loss of farmland was addressed in the Otay Ranch GDP EIR (90-01) and SPA One EIR (95-01). According to the SPA One EIR (95-01), the Olympic Parkway project will result in the conversion of land classified by the California Department of Conservation as "Farmland of Local Importance" from agricultural to urban use. The site has been utilized for dry farming and grazing in the past, but is not currently utilized for intensive farming such as irrigated row crops. However, as identified in the SPA One EIR (95-01) the impact of SPA One (including the portion of Olympic Parkway that traverses SPA One) on agricultural resources/operations will be less than significant, as the construction of the proposed project will not impact any Prime Farmland, Farmland of Statewide Importance, or Unique Farmland. Additionally, the conversion of Farmland of Local Importance can be considered a less than signrncant impact to agriculture, as the eventual conversion of agricultural land to new land uses was addressed in the 1989 Chula Vista General Plan update. According to the General Plan, the City considers agricultural uses to be interim uses, the loss of which is not significant. The loss of farmland would contribute to the cumulative loss of agricultural land in the Eastern Territories of Chula Vista, although not to a significant extent due to the minimal loss of acreage (SPA One EIR 95- 01). Eastlake Impacts related to the loss of farmland was not addressed in the Eastlake Greens/Trails Re-Planning Program SEIR_. . Response to Id. The proposed project traverses an area of vacant land and will not disrupt or divide the physical ammgement of an established community. The proposed project will accommodate new development proposed along the parkway, and has been incorporated into the plans for each of the new communities that are proposed, or under construction along the roadway. Page 26 - - Potentially Potentially Significant X- than Sipificant Uol... Sipificaot No Impact Mitigated Impact Impact LAND USE MITIGATION Sunbow The portion of Olympic Parkway through the Sunbow site was anticipated in the General Plan and therefore no mitigation measures were identified in the Sunbow EIR (88-1) with regard to land use impacts and the City's General Plan. . Oúzy Ranch - No mitigation measures were identified in the Otay Ranch GDP EIR (90-01) and the SPA One EIR (95-01) with regard to land use impacts of the roadway because the road is anticiapted in the City's General Plan and therefore not in conflict with adopted land use policies. EastJake No mitigation measures were identified in the Eastlake Greensrrra.ils Re-Planning Program SEIR. . with regard to land use impacts of the roadway because the road is anticipated in the City's General Plan and therefore not in conflict with adopted land use policies. Impacts,ofthe proposed project on sensitive biological resources are analyzed in Section VII (Biologièàl Resources) of this document which also includes mitigation measures for the identified impact. Those ineasures will reduce the proposed project's impact on applicable environmental plans to a level less than significant. In fact, Olympic Parkway is part of the City's Circulation Element, and the construction of this roadway has been identified as a mitigation measure to alleviate impacts of traffic anticipated from the development of a variety of projects in the area. n. POPULATION AND HOUSING. Would the proposal: a) Cumulatively exceed official regional or local 0 0 0 181 population projections? b) Induce substantial growth in an area either 0 0 D 181 directly or indirectly (e.g., through projects in an undeveloped area or extension of major infrastructure)? c) Displace existing housing, especially affordable 0 0 0 181 housing? Page 27 - - Potentially Potentially SiplfiCllal Leu than SiplfiCllat Ual... Sigaificaal No Impact Mltipted Impact Impact Comments: Response Da. The proposed project will not result in an increase in the population of the area, as no residential dwelling units are proposed. As such, the project will not exceed official regional population projections. The construction and operation of the Olympic Parkway as it relates to population and housing impacts is not addressed in Sunbow EIR (88-1), Otay Ranch GDP EIR .. Ii Otay Ranch SPA One EIR (95-01), and Eastlake GreensITrails Re-Planning Program SEIR -. Response llb. The proposed project is an extension of infrastructure through an area that is currently developing. Planned communities have either been approved, and/or are under construction along the proposed parkway alignment, and include the Sunbow, McMillan, Otay Ranch, and Eastlake properties. Construction of the project will not induce growth in the area, as these areas have been approved for development. The project will provide access to these planned communities consistent with the City's adopted plans for development in the area and the circulation element. The construction and operation of the Olympic Parkway as it relates to population and housing impacts is not addressed in Sunbow EIR (88-1), Otay Ranch GDP EIR _' Otay Ranch SPA One EIR (95- 01), and Eastlake GreensITrails Re-Planning Program SEIR . . Response lIe. The proposed project will not displace existing housing as it will traverse vacant land. ~ The co~ction and operation of the Olympic Parkway as it relates to population and housing J impacts is not addressed in Sunbow EIR (88-1), Otay Ranch GDP E.1), Otay Ranch SPA One EIR (95-01), and Eastlake GreensITrails Re-Planning Program SEIR . m. GEOPHYSICAL. Would the proposal result in or expose people to potential impacts involving: " { ~ a) Unstable earth conditions or changes in 0 181 0 0 geologic substructures? b) Disruptions, displacements, compaction or 0 181 0 0 overcovering of the soil? c) Change in topography or ground surface relief 0 181 0 D features? d) The destruction, covering or modification of 0 181 0 0 any unique geologic or physical features? e) Any increase in wind or water erosion of soils, 0 181 D 0 either on or off the site? f) Changes in deposition or erosion of beach 0 181 0 0 sands, or changes in siltation, deposition or erosion which may modify the channel of a river or stream or the bed of the ocean or any bay inlet or lake? g) Exposure of people or property to geologic 0 181 0 0 hazards such as earthquakes, landslides, mud slides, ground failure, or similar hazards? Page 28 - - Potentially Potentially SiplflC.lnt Leu than Siplficant Unlas Significant No Impact Mitigated Impact Impact Comments: A preliminary geotechnical evaluation was performed for the proposed Olympic Parkway project titled, "Preliminary Geotechnical Evaluation Olympic Parkway Feasibility Study". According to this evaluation, the aJignment cotridor is underlain by the Sweetwater, Otay, and San Diego geologic formations and is underlain by surficial soils consisting of alluvium, landsJide debris, residuallcolluvi~ and artificial fill. The study indicates that overall the project is feasible given the geotechnical conditions of the site. Special measures wilJ be required to address localized geotechnical conditions, as discussed under "Geophysical Mitigation". Response to IDa and mb._The proposed project has the potential to result in significant impacts to unstable earth conditions. Additionally, the project wilJ require extensive grading for implementation which wiJ) result in disruptions, displacement, and compaction of the soil within the alignment and borrow areas. As discussed in the PreJiminary Geotechnical Evaluation, the granular facies of the Sweetwater Formation have generaJJy favorable engineering characteristics with high shear strength and low expansion potential. The claystones and bentonitic clay deposits identified within the alignment cotridor wilJ potentially require slope stabilization where cut slopes expose these materials, especially in southerly and westerly facing cuts. Although the majority of the Otay Formation is composed generally of granular materials, the claystones and bentonite clays can be critical to the occurrence of serious geotechnical problems (landslides, expansive soils) which would require remediation. The depth of alluvium ranges from 35- 45 feet within portions of the alignment corridor. Alluvium is generally poorly consolidated and compressible. Saturated alluvium was encountered at depths ranging from 6 to 34 feet below existing grades, even in areas which have surface water flowing in Poggi Canyon. Landslide deposits are either not identified in the alignment cotridor, or require further investigation prior to development. Residual and colluvial soils have similar engineering characteristics. Topsoil and colluvial materials have generally poor engineering characteristics. Artificial fill soils include old fill to create a small dam across Poggi Canyon in the eastern portion of the alignment, and recent grading for Orange A venue in the west portion. The proposed project will result in a change in topography and the covering of Poggi Canyon, which is a unique physical feature. According to the preliminary design plans for Olympic Parkway, the roadway wilJ basically follow Poggi Canyon. In order to construct the roadway, Poggi Canyon will be graded, and fill material will be brought into the canyon from adjacent borrow areas. The roadway wilJ be elevated by imported fill material above the existing ground level for the entire alignment (with the exception of where it passes through the Sunbow development), with typical elevations of 20 to 30 feet above existing ground levels, and reaching a maximum of 60 feet above the current elevation of Poggi Canyon at the location of planned Palomar Road. Modifications to Poggi Canyon and the borrow areas adjacent to the project associateð with construction of the proposed roadway is anticipated to result in a temporary increase in soil erosion. All applicable National Pollutant Discharge Elimination System (NPDES) permit requirements for urban runoff and storm water discharge and any regulations adopted by the City of Chula Vista must be complied with prior to obtaining a permit for grading activities which wilJ result in additional water erosion of soils. Construction of the proposed roadway wilJ involve filling the existing drainage channel which runs through Poggi Canyon. A new drainage channel wilJ be created on the north side of the roadway which will control runoff from the roadway, as well as from upstream developments. The drainage channel consists of a series of catch basins, drops structures, and a large detention basin which have been designed to convey flow in a east to west direction along the length of the parkway. Page 29 - .- Potenüally Potentially Significant Leu than Significant Unlas SignifJeant No Impact Mitigated Impact Impact The functions oftbe channel from the standpoint offloodflow alteration and streambed stabilization are anticipated to be improved over the present condition. In its present form, the Poggi Canyon channel consists of an erosive bottom with varying slopes and limited vegetation development. As the watershed develops, increased runoff is expected to exacerbate erosion within those areas which are presently incised and increase head cutting through flatter portions of the channel as erosion gullies migrate upstream (similar to what bad already occurred on the Sunbow site immediately downstream of the proposed channel improvements). The proposed channel would be stabilized at a width and slope that will allow for non-scouring flows (less than 6 feet per second) to be conveyed through the entire system. A large detention basin is proposed to further address the increased flow rates associated with increased impermeability of the watershed when developed thorough buildout. The net result of the channel design is to ensure that the 1 OO-year post-development flood flow exiting the project area is kept to a level that is at or below the 100-year pre-development flows. Proposed wetland vegetation and drop structures will further aid in stabilizing the channel areas against erosion. The project site is located in the general proximity of several active and potentially active faults. Earthquakes originating within approximately 60 miles of the project site are capable of generating ground shaking of engineering significance to the proposed parkway. The San Diego Trough, Coronado Bank, Rose Canyon, San Miguel, Elsinore, San Jacinto, and San Andreas Fault Zones are the most significant faults with regard to the seismic design of the project. Active faults are not known to transect the proposed roadway alignment. It is unlikely that surface rupture of the La Nacion fault would occur during the design life of the project. Groundwater was encountered in several of the test borings drilled in Poggi Canyon and several zones of primarily granular materials were identified in the alluvium. Therefore, under current conditions there appears to be a potential for liquefaction of the alluvial soils. The potential for liquefaction will depend on the final grading for Olympic Parkway and how the loose alluvium is treated during construction. GEOPHYSICAL MITIGATION 1. The recommendations contained in the "Preliminary Geotechnical Evaluation Olympic Parkway Feasibility Study" shall be implemented as part of project grading and construction. As identified in the Preliminary Geotechnical Evaluation a comprehensive subsurface evaluation, including development-specific subsurface exploration and laboratory testing is recommended to be performed to aid design and construction of future roadway improvements. The purpose of the subsurface evaluation is to assess subsurface geotechnical conditions and to provide specific data regarding potential geotechnical hazards and constraints, as well as information pertaining to the engineering characteristics of underlying earth materials. From these data, specific geotechnical recommendations for grading/earthwork, slope stability, surface and subsurface drainage, pavement design, drainage and other geotechnical design considerations can be prepared. The following identifies the preliminary geotechnical recommendations to address alluvium, landslides, slope stability, Excavatability, groundwater, liquefaction and dynamic settlement, soil corrosivity and expansive soil. Alluvium - Tbe majority of the proposed alignment is underlain by significant depths of compressible and liquefaction-susceptible alluvium. Feasible earthwork options include removal and recompaction of compressible alluvium, dewatering as needed, and removal recompaction down to the water table. Surcharge the remaining saturated alluvial section to achieve stable density for roadway support and minimal liquefaction potential. Detailed Page 30 - - PotenüaJlý Potentially Sigaifi"..t Leu than Siplfic:ant Unlea Sigaific:ant No Impad Mlticaled Imput Impad geotechnical sampling and testing will be required to model surcharge effectiveness, particularly the imposed load/settlement-time relationships. Landslides - Further investigation of the landslide features mapped and possible features identified from aerial photographs/topography needs to be performed to evaluate the potential for slope failures adjacent to the proposed alignment. Some of these features may require stabilization or removal during grading. In some cases, possible landslides identified in geotechnical studies of the area may not represent a landslide hazard. Slope Stability - In general, cuts in the granular formational materials should be grossly stable at gradients of2:1 (horizontal to vertical). Considerable erosion and gullies were observed on the newly cut slopes located on the south side of Poggi Canyon in the Sunbow development. Planting these slopes should help reduce surficial stability and erosion problems. Grading plans for the canyon roadway have not been fmalized. Cut and fill slopes descending into the canyon shall be evaluated for gross and surficial stability. Excavatability - Alluvial materials found in Poggi Canyon should be excavatable with conventional grading equipment. Formational materials in the eastern area of the project will likely contain scattered concretionary materials which could require local heavy ripping. Special handling of the oversize material in the fill will probably be required. Groundwater - Canyon areas to receive fill should have subdrains installed to reduce and control potential future seepage out of the slopes. Where fill embankments are planned for both the planned parkway and the Poggi Creek drainage, consideration should be given to installing a subdrainat the base of the alluvial removals and prior to fill placement. Dewatering may be required as part of the remediation of the underlying alluvium. Liquefaction and Dynamic Settlement - Subsurface exploration and associated laboratory testing shall be performed during the design phase of the roadway to evaluate the liquefaction and dynamic settlement potential of on-site soils. It is possible that liquefaction will have limited impact on the planned parkway. Under these circumstances, consideration can be give to reading minor damage to roadways rather than totally mitigation against any potential movement. If liquefaction of underlying soils is found to be a significant problem, mitigation of already graded area could include stone piles, compaction grouting or other ground modification techniques. Soil Corrosivity - Soils within the alignment have been identified as corrosive with respect to both ferrous metals and concrete. Further testing shall be performed to determine the extent of the corrosive materials so that improvements can be designed accordingly. Expansive Soil - Soils exhibiting expansive characteristics are present within the formational materials, residual/colluvial soils and alluvium. Expansive soils also have generally poor engineering characteristics. Selective grading shall be performed to prevent these materials from being placed within 5 feet of the final grade of the proposed roadway. Ifexpansive soils are exposed in cut portions of the roadway, these materials should be under cut 5 feet and replaced with non-expansive materials. IV. WATER. Would the proposal result in: Page 31 - - Potentially Potentially SiIDlficant r- than SiIDlficant Unl... S'IIDlficant No Impact Mlûpted Impact Impact a) Changes in absorption rates, drainage patterns, or 0 ~ 0 0 the rate and amount of surface runoff? b) Exposure of people or property to water related 0 0 0 ~ hazards such as flooding or tidal waves? c) Discharge into surface waters or other alteration of 0 0 ~ 0 surface water quality (e.g., temperature, dissolved oxygen or turbidity)? d) Changes in the amount of surface water in any 0 ~ 0 0 water body? e) Changes in currents, or the course of direction of 0 ~ 0 0 water movements, in either marine or fresh waters? f) Change in 1he quantity of ground waters, either 0 0 0 ~ through direct additions or withdrawals, or through interception of an aquifer by cuts or excavations? g) Altered direction or rate of flow of groundwater? 0 0 0 ~ h) Impacts to groundwater quality? 0 0 ~ 0 i) Alterations to the course or flow of flood waters? 0 ~ 0 0 j) Substantial reduction in the amount of water 0 0 0 ~ otherwise available for public water supplies? Page 32 - - Potentially Poteatially Significant Leu than Significant Unleu Significant No Imput Mitigated Impact Impact Comments: Response to IVa. Construction of the proposed project will increase impervious surfaces in the project area and will affect the natural drainage system within Poggi Canyon. Changes in existing absorption rates, drainage patterns, and/or rate and amount of surface runoff will result as the project will fill the existing Poggi Canyon drainage, and a new drainage channel will be created. Construction of the new drainage channel, as well as implementation of Water Mitigation identified below, will reduce this impact to a less than significant level. .. Response to IVb. The proposed project will not result in the exposure of people or property to water related hazards such as flooding, as the roadway will not be located within the 100-flood plain. The proposed project will not be constructed in an area susceptible to impacts from tidal waves. Response to IV Co Runoff flowing from impervious surfaces typically contains pollutants such as oils, fuel residues, and heavy metals which would diminish water quality in downstream water. Runoff from proposed developments will be controlled via a detention basin proposed as part of the drainage system to be located on the north side of the roadway. According to the Otay Ranch GDP EIR (90- 01), and SPA One EIR (95-01) urban runoff would not carry enough pollutants to significantly degrade water quality in downstream areas. Response to IV d. Decreased absorption of rainfall which would occur with increased impervious surfaces could potentially change the amount of seasonal surface water in Poggi Canyon. Construction of the new drainage system, which includes a large detention basin in the new drainage channel, will reduce the impact to hydrology flows/drainage to a less than significant level. Response IVe. Portions of Poggi Canyon contain fresh water. This canyon will be filled, and a new drainage facility will be created. The replacement drainage facility will generally flow in the same direction as the existing drainage that will be impacted. The impact to this issue will be mitigated by the replacement drainage and through conditions of the USACOE 404 permit and RWQCB 401 certification. Page 33 - ,- Potntially Potentially Significant Leu than Significant Un.... Significant N. Impact Mitipted Impact Impact Response to IV!, Ivg, IVb. The increase in impervious surfaces associated with development on the project site will increase the amount of runoff from precipitation, while decreasing the amount of percolation. Neither the SPA One area, nor the Sunbow or Eastlake developments are located in an area of significant groundwater recharge. Therefore, no impact to groundwater quality is anticipated. The project site and surrounding area do not constitute a significant recharge area. According to the SPA One EIR (95-01), the existing ground water is of poor quality in the project area. The Otay Subunit in the western coastal plain has fair to poor groundwater quality due to the migration of connate brines. Groundwater analyzed from two wells in Poggi Canyon contained concentrations of total dissolved solids (IDS) from 3,900 to 5,860 milligrams per liter. IDS, chloride and nitrate values exceeded Federal Secondary Drinking Water Standards in both wells. Nitrate levels were elevated franging from 40.7 to 54.2 milligrams per liter. No significant impacts to groundwater quality are anticipated to occur during development and operation of the roadway. Response to IVi. The natural drainage system of Poggi Canyon will be altered with implementation of the project, as such the alterations to the current course or flow of flood waters will occur. This impact will be mitigated through the implementation of the drainage system proposed as part of the project. This drainage system will accommodate expected flood flows from future developments within the drainage basin. The proþ<?sed drainage plan consists of the construction of a new drainage channel and detention basin to accommodate storm water runoff. Implementation of the storm drain plan will reduce impacts resulting from alterations to the course or flow of flood waters to a less than significant level. Response to IVj. Neither construction nor operation of the proposed roadway will significantly affect the amount of water available for public water supplies. Some water will need to be used for slope landscaping. However, water used for this purpose will be reclaimed water and will not affect the amount of potable water available for public supply. Sunbow The Sunbow EIR (88-1) identifies the project's increase in impervious surfaces from development including roadway construction will result in increased runoff. Flow contributions may impact facilities associated with the Telegraph and Poggi Canyon basins, requiring upgrading as mitigation. Water quality impacts are also identified with the proposed project urban development and associated urban pollutants. Implementation ofrneasures contained in Sunbow EIR 88-01, as well as standard City grading and construction procedures/requirements would mitigate project drainage and water quality impacts to a level less than significant. Oúzy Ranch The Otay Ranch SPA One EIR (95-01) identifies an increase in impervious surfaces resulting from the SPA One plan (which includes the Olympic Parkway) that will increase the amount of urban runoff, while decreasing the amount of percolation into the groundwater. Additionally, the project will result in an increase in runoff flows off-site which could potentially impact downstream Page 34 .- -.. Potentially Potentially Significant Leu than Siplficant Unleu Siplficant No Impact Mitigated Impact Impact facilities. Due to the filtering of pollutants during percolation, in addition to the poor quality of existing ground water within SPA One, no significant impacts to ground water quality were identified. The SPA One area is not located in an area of significant aquifer recharge; therefore, no impacts to groundwater quantity were identified. As identified in EIR 95-01, Poggi Canyon will be channelized within SPA One as an earthen trapezoidal channel parallel to the proposed Orange Avenue (Olympic Parkway). Increased flows expected at buildout of SPA One would be mitigated with the implementation of an approximately 6 acre detention based recommended at the western boundary of SPA One. This detention basin is provided as part of the drainage plan for the Olympic Parkway project. The fInal size and design of the detention basin would be detennined with the preparation of fInal grading plans (for SPA One), and will be designed to accommodate a 1 OO-year frequency stonn. The increase in runoff as a result of development of the proposed project (SPA One) was identifIed as a potential impact. Implementation of Mitigation Measures 2 contained in Section 4.9 ofEIR 95-01, and compliance with Regional Water Quality Control Board pennitting requirements will reduce the identifIed impacts to a level less than signifIcant. Eastlake The Eastlake Greensffrails Re-Planning Program SEIR_, does not specifically address drainage in Poggi Canyon, or as a result of the development of the portion of Olympic Parkway adjacent to Eastlake Trails; however, the EIR indicates that the increase in impervious surfaces and water runoff expected from the proposed Eastlake Trails development would be controlled, and mitigated to a level less than signifIcant through the implementation of the on-site drainage system. Runoff flowing across impervious surfaces and landscaping would contain pollutants such as oils, fuel residues, heavy metals, fertilizers, and pesticides. The runoff from the project itself would not significantly degrade water quality in downstream areas; however, the project would contribute cumulatively with other projects in the watershed in affecting water quality. Implementation of pollution control devices and BMPs would help to lessen the cumulative effect. WATER MITIGATION Sunbow Implementation of measures contained in Sunbow EIR 88-01, as well as standard City grading and construction procedures/requirements would mitigate project drainage and water quality impacts to a level less than significant. The channel proposed as part of the roadway project implements some of the drainage mitigation measures identified in EIR 88-01. Otay Ranch As identifIed in the SPA One EIR, potentially significant water resources impacts resulting from development in the project area can be reduced to a less than signifIcant level through the use of Best Management Practices and through the implementation of mitigation measures. Mitigation measures identifIed in the SPA One EIR include the following: 1. Prior to the issuance of grading pennits and during grading the applicant shall comply with all applicable regulations established by the United States Environmental Protection Agency as set forth in the National Pollutant Discharge Elimination System (NPDES) penn it requirements for urban runoff and stonnwater drainage and any regulations adopted by the City of Chula Vista pursuant thereto. The City of Chula Vista and County of San Diego have a Municipal Pennit from the State Regional Water Quality Control Board (RWQCB) for stonnwater discharge. In Page 35 - -, Potentially Potentially Significant Leu than Significant Unl... Significant No Impact Mitigated Impact Impact order to be covered under NPDES Municipal Permit No. CA 0108758, the proposed developed area will be required to mitigate impacts to stormwater quality. In addition, RWQCB has issued one general permit that applies to construction activity. In order to be covered 1Dlder the Construction General Permit, a Notice of Intent (NOI) must be filed with RWQCB. Compliance with the Permit requires that a stormwater po1lution plan be prepared and implemented for the project. Best management practices, design, treatment, and monitoring for stormwater quality must be addressed with respect to Municipal and Construction Permits. Eas/lake 4.4.4.1 Hydroseeding and landscaping of any cut/fi1l slopes disturbed or built during the construction phase of (the Eastlake Trails project) with appropriate ground cover vegetation would be performed within 30 days of completion of grading activities. 4.4.4.2 Areas of native vegetation or adjoining slopes to be avoided during grading activities would be delineated to minimize disturbance to existing vegetation and slopes. 4.4.4.3 Artificial ground cover, hay bales, and catch basins to retard the rate of runoff from manufactured slopes would be insta1led if grading occurs during wet weather season (November 1 through April 1 ). 4.4.4.4 Fine particulates in geologic materials used to construct the surficial layers of manufactured slopes would not be specific unless a suitable alternative is not available. 4.4.4.5 Temporary sedimentation and desilting basins between graded areas and streams would be provided during grading. 4.4.4.6 Detention basins, effective for very large drainage areas. These are essentia1ly ponds with controlled release rates to minimize downstream effects. Some po1lutants can settle during storage and improve the quality of water released. 4.4.4.7 Infiltration basins, designed to hold runoff and a1low percolation into the ground. These basins need adequate storage volume and good permeability of the underlying soils. 4.4.4.8 Infiltration trenches and dry we1ls, holes, or trenches fi1led with aggregate and then covered. Dry wells are typica1ly used for runoff from roofs; infiltration trenches typically serve larger areas, such as streets and parking lots in commercial areas. Both are best suited for areas with permeable soils and a sufficiently low water table or bedrock. 4.4.4.9 Porous pavement such a lattice pavers or porous asphalt. These may be used to replace large areas of paving that are not subject to heavy traffic. 4.4.4.10 Vegetative controls. Plant materials which intercept rainfa1l and filter pollutants and absorb nutrients. 4.4.4.11 Grassed swales, shallow grass-covered channels used in place of a buried storm drain. This type of vegetative control is most applicable to residential areas. Page 36 - - Potentially Potentially Significant Leu than Significant Unl... Significant No Impact Mitigated Impact Impact V. AIR QUALITY. Would the proposal: a) Violate any air quality standard or contribute to 0 ~ 0 0 an existing or projected air quality violation? b) Expose sensitive receptors to pollutants? 0 0 0 ~ c) Alter air movement, moisture, or temperature, or 0 0 0 ~ cause any change in climate, either locally or regionally? d) Create objectionable odors? 0 0 0 181 e) Create a substantial increase in stationary or non- 0 0 0 181 stationary sources of air emissions or the deterioration o.f ambient air quality? Comments: Response to Va. The San Diego region is cWTently a non-attainment area for federal and state standards for ozone, carbon monoxide, and particulates (PMlO). The incremental increase in short- term construction impacts associated with clearing, borrow area excavation, and grading activities as well as tailpipe emissions from construction vehicles and equipment will contribute to existing air quality violations on a short-term basis. Compliance with pollution control measures during construction will reduce air quality impacts to a less than significant level. Response to Vb. Currently, there are no sensitive receptors located in the vicinity of the roadway alignment or borrow areas. Therefore, the proposed project would not result in the exposure of sensitive receptors to pollutants. Future development along the roadway corridor will not be impacted from the project as land uses have been planned around the roadway, and sensitive receptors will not be located adjacent to the roadway. Because the proposed project alignment is generally consistent with the alignment analyzed in previous environmental plans no new impact is anticipated. Response to V Co The construction of and operation of the proposed roadway will not alter air movement, moisture, or temperature, or cause any change in climate, either locally or regionally. Response to Yd. Normal operation of the proposed roadway will not create objectionable odors. Response to Ve. In the long-term, the proposed roadway will not generate additional traffic which would lead to long-term air quality impacts. Increased traffic will be generated by future land development projects described in earlier referenced EIRs. Rather, the roadway would redistribute existing traffic patterns and alleviate congestion on other east-west roadways. The degree to which the project would contribute to existing air quality violations would be less than significant. The Olympic Parkway was addressed in the General Plan EIR (EIR 88-02) and the proposed project does not alter the impact as previously addressed. Sunbow The Sunbow EIR (88-1) identifies a significant, but mitigable impact related to short-term air quality as a result of project construction (including Olympic Parkway). Page 37 - - Potentially Potentially Significant Leu than Significant Un..... Significant No Impaet Miüpted Impaet lmpaet Dtay Ranch The Otay Ranch SPA One EIR (95-01) identifies a significant, but mitigable impact related to short- term air quality as a result of project construction (including Olympic Parkway). EastIake The Eastlake Greensrrrails Re-Planning Program SEIR_ identifies a significant, but mitigable impact related to short-term-air quality as a result of project construction (including Olympic Parkway). AIR QUALITY MITIGATION Sunbow Mitigation Measures identified in the Sunbow EIR (88-1), subject to City approval are: · Use of watering or other dust palliatives to reduce fugitive dust; emissions reductions of about 50 percent can be realized by implementation of these measures. · Hydroseeding, landscaping, or developing of disturbed areas as soon as possible to reduce dust , generation. f · Proper covering of trucks hauling fill material. · Enforcement of a 20 mile-per-hour speed limit on unpaved surfaces. . ( · Use of heavy-duty construction equipment that is equipped with modified combustion/fuel ! injection systems for emission control. Otay Ranch Mitigation Measures identified in the Otay Ranch SPA One EIR (95-01), to reduce construction emISSIons are: · Minimize simultaneous operation of multiple construction equipment units (i.e., phase construction to minimize impacts). · Use low pollutant-emitting construction equipment. · Use electrical construction equipment as practical. · Use catalytic reduction for gasoline-powered equipment. · Use injection timing retard for diesel-powered equipment. · Water the construction area twice daily to minimize fugitive dust. · Stabilize (for example, hydroseed) graded areas as quickly as possible to minimize fugitive dust · Pave penn anent roads as quickly as possible to minimize dust. Eastlake Mitigation Measures identified in the Eastlake Greensrrrails Re-Planning Program SEIR_, to reduce construction emissions are: Page 38 - - Potentially Potentially Significant Leu Ib.n Significant Unl... Significant No Impact Miüpted Imp.ct Imput 1. All unpaved construction areas shall be sprinkled with water or other acceptable San Diego APCD dust control agents during dust-generating activities to reduce dust emissions. Additional watering or acceptable APCD dust control agents shall be applied during dry weather or windy days until dust emissions are not visible. Emissions reductions of about 50 percent can be realized by implementation of these measures. 2. Trucks hauling dirt and debris should be properly covered to reduce windblown dust and spills. 3. Enforce a 20-mile-per-hour speed limit on unpaved surfaces. 4. On dry days, dirt and debris spilled onto paved surfaces shall be swept up immediately to reduce resuspension of particulate matter caused by vehicle movement. Approach routes to construction sites shall be cleaned daily of construction-related dirt in dry weather. 5. On-site stockpiles of excavated material shall be covered or watered. 6. Disturbed area shall be hydroseeded, landscaped, or developed as quickly as possible and as directed by the City to reduce dust generation. 7. Use low pollutant-emitting construction equipment. 8. Heavy-duty construction equipment with modified combustion/fuel injection systems for emissions control shall be utilized during grading and construction activities. 9. Equip construction equipment with prechamber diesel engines (or equivalent) together with proper maintenance and operation to reduce emissions of nitrogen oxide to the extent available and feasible. 10. Use electrical construction equipment, to the extent feasible. 11. Use catalytic reduction for gasoline-powered equipment. 12. The simultaneous operations of multiple construction equipment units shall be minimized (i.e., phase construction to minimize impacts). VI. TRANSPORTATION/CIRCULATION. Would the proposal result in: a) Increased vehicle trips or traffic congestion? 0 0 0 181 b) Hazards to safety from design features (e.g., 0 0 0 181 sharp curves or dangerous intersections) or incompatible uses (e.g., fann equipment)? c) Inadequate emergency access or access to nearby 0 0 0 181 uses? d) Insufficient parking capacity on-site or off-site? 0 0 0 181 e) Hazards or barriers for pedestrians or bicyclists? 0 0 0 181 Page 39 - - Potentially Potentially SignifiCllnl Leu than SignlfiCllnl Unl... SignifiCllnl No Impact Mitigated Impacl Impact f) Conflicts with adopted policies supporting 0 0 0 181 alternative transportation (e.g. bus turnouts, bicycle racks)? g) Rail, waterborne or air traffic impacts? 0 0 0 181 h) A "large project" under the Congestion 0 0 0 181 Management Program? (An equivalent of 2400 or more average ~i1y vehicle trips or 200 or more peak-hour vehicle trips.) Comments: Response to VIa. The proposed project will not generate increased vehicular trips; however, it will result in the redistribution of existing and projected future trips in the project area. Future land development projects in the area will generate traffic impacts as decribed in earlier referenced EIRs. The project will also provide access "!O future development and development which is already underway adjacent to the proposed roadway. The project will reduce congestion on existing adjacent east-west roadways. Response to VIb. The proposed project will not result in hazards to safety from design features or incompàtible uses. The roadway will be designed and constructed to the City's safety engineering standards. Response to VIe. The proposed project will not result in inadequate emergency access or access to nearby uses. Construction of the roadway will provide additional emergency access within the area smrounding the project. Response to VId. The project will not result in insufficient parking capacity, as it does not involve the development of land uses which would generate the need for parking facilities. Response to VIe. The proposed roadway will be constructed according to the City's engineering standards for a 6-lane primary arterial/4-lane major roadway. Response to VIf. The proposed project will not conflict with adopted policies supporting alternative transportation, as it will pennit bicycle and pedestrian traffic and will accommodate the expansion of public transit routes. Response to VIg. The proposed project will not result in impacts to rail, waterborne, or air traffic transportation. The proposed project is not located in dose proximity to any of these modes of transportation. Response to VIh. The proposed project is not classified as a "large project" by the Congestion Management Program, as it will not generate automobile trips. The project has been identified as a needed improvement to serve ongoing and future development in the project area. vn. BIOLOGICAL RESOURCES. Would the proposal result in impacts to: Page 40 - - Potenûally Potentially SignifiCllnt Leu than SignifiCIIDt Unl... SignlfiCllnt No Impact Miûgated Impact Impact a) Endangered, sensitive species, species of concern 0 g 0 0 or species that are candidates for listing? b) Locally designated species (e.g., heritage trees)? 0 0 0 g c) Locally designated natural communities (e.g, oak D g D D forest, coastal habitat, etc.)? d) Wetland habitat (e.g., marsh, riparian and vernal 0 ~ 0 0 pool)? ~ e) Wildlife dispersal or migration conidors? 0 ~ 0 0 f) Affect regional habitat preservation planning 0 ~ D D efforts? Comments: Biological resource impacts as a result of construction and operation of the proposed roadway, including the borrow area excavation, have been previously addressed within each EIR for the major planned developments abutting the proposed roadway (Sunbow, Otay Ranch, and Eastlake). The most current biological data is provided by the Biological Resources Report and Impact Assessment for Otay Ranch SPA One and GDP/SRP Amendment Areas (Dudek, February 1998) and the Eastlake GreensfTrails Replanning Program SEIR for Eastlake (RECON, April 1998). Some grading and development has occurred in confonnance with approved plans within the Sunbow portion of the proposed parkway alignment. The following summarizes the fmdings of the relevant environmental documentation and describes the current status of biological resources within the Sunbow, Otay Ranch SPA One, and Eastlake portions of the alignment. Sunbow The Sunbow General Development Plan Pre-Zone Final EIR identified impacts to wetland resources as a result of the construction of Olympic Parkway. U.S. Army Corps of Engineers, Department of Fish and Game, and Regional Water Quality Control Board permits for wetland disturbance associated with construction of the portion of the roadway through the Sunbow pròperty have been obtained. A wetland grading and revegetation plan has been prepared for Poggi Canyon and is currently being implemented. Mitigation for these impacts, as well as other wetland impacts on the Sunbow property is being addressed through the wetland restoration plan. Impacts to upland habitat (coastal sage scrub) as a result of development of the Sunbow project are addressed through an approved coastal sage scrub mitigation plan. This approved mitigation plan requires off-site purchase of 6.5 acres of mitigation land at the time Phase m of Sunbow is implemented. Olympic Parkway is part of Phase m. This plan involves the purchase of off-site habitat and the preservation of on-site areas to mitigate for on-site habitat losses. The coastal sage scrub mitigation plan also addresses impacts to coastal sage scrub associated with construction of Olympic Parkway through the Sun bow property. Page 4] - - Potentially Poteatially Sipificant Leu than Siplficant Unl... Siplficant No Imput Mitill"led Impact Impact Otay Ranch The majority of the impacts to sensitive biological resources from construction of Olympic Parkway will generally occur between Paseo Ranchero and SR-125. This portion of the alignment traverses portions of Otay Ranch SPA One. The Otay Ranch SPA One EIR identified Poggi Canyon as a local conidor for target mammal species and is considered a regional corridor for the coastal California gnatcatcher and the cactus wren as it contains some areas of coastal sage scrub and maritime succulent scrub. However, much of Poggi Canyon does not presently function as an effective wildlife corridor, due to its topographic separation from Salt Creek and Wolf canyons (except for two shallow passes) and the presence of agricultural land and other development at its eastern and western termini. Poggi Canyon functions as a "local" conidor for mammal species, and as a regional connection for avian species. To function as an effective corridor for avian species, revegetation of areas with coastal sage scrub and maritime succulent scrub would be required. Creation of such a corridor through revegetation was considered with the preparation of the original Otay Ranch GDP; however, such efforts are no longer proposed as determined through the modifications approved by the Chula Vista City Council on November 10, 1998 by Resolution # 19254. Currently, Poggi Canyon does not link two or more patches of habitat, as by defmition, is required of a corridor. Eastlake No signifi~t impacts to biological resources are anticipated for the portion of the roadway that traverses the Eastlake properties including the southern Landswap parcels. According to the Eastlake Greensrrrails Re-Planning Program SEIR_, the land within this portion of the alignment conidor has been historically utilized fo~ agricultural operations and does not contain significant environmental resources. Page 42 - - Potentially Potentially Significant Leu than Significant Unleu Significant No Impact Mitigated Impact Impact Project Specific Roadway Impacts UphuuJ Habitat Sensitive upland vegetation within the Olympic Parkway alignment corridor has been mapped utilizing existing biological reports. Sensitive upland vegetation within the alignment corridor, including Borrow Area (1) consists of coastal sage scrub, disturbed coastal sage scrub, maritime succulent scrub, disturbed maritime succulent scrub, valley needlegrass grassland and disturbed habitat. Figures 4 through 14 depict the sensitive biological upland habitat located within the alignment. Figure 17 depicts the sensitive habitat within Borrow Area (1). Attachment A depicts the areas of sensitive habitat impacted by the roadway in greater detail. These figures also depict the proposed alignment and limits of grading. Based on this preliminary design, it is anticipated that the proposed project will result in impacts to the biological resources identified in Table 1. Table 1 depicts the acreage of each habitat estimated to be impacted based on preliminary design for each of the habitat types. Approximately 2.43 acres of coastal sage scrub will be impacted within the Sunbow portion; however, this loss of acreage has already been accounted for in the Sunbow permits and is not shown in Table 1. Impacts to the remaining upland resources are located within the Otay Ranch portion of the alignment and Borrow Area (1) and will be mitigated to a less than significant level by obtaining an Interim take permit under the 4( d) rule and by implementing the Preserve established in the Otay Ranch General Development Plan and RMP as modified by the Chula Vista City Council on November 10, 1998 by Resolution #19254. Coastol Sage ScrlÚJ: Coastal sage scrub is a native plant community composed of a variety of soft, low, aromatic shrubs, characteristically dominated by drought-tolerant deciduous species such as California sagebrush, California buckwheat, and sages, with scattered evergreen shrubs, including lemonadebeny, laurel sumac, and tyon. The location of coastal sage scrub habitat is depicted on Figures 6, 7, 8, 9, and 17 and in Attachment B. Maritime Succulent Scrub: Maritime succulent scrub is similar to coastal sage scrub, but also contains a mixture of stem and leaf succulents, typically including barrel cactus, coast cholla, coast prickly-pear, cliff spurge, San Diego bur-sage and jojoba. The location of maritime succulent scrub is depicted on Figures 6, 7, 8, 9, and 17 and in Attachment B. Valley Needlegrass Grassland: Valley needlegrass grassland is a native grassland dominated by perennial bunchgrasses, such as needlegrass. This plant community typically alternates with coastal sage scrub on some clay soils, often on more mesic exposures and at the bases of slopes, but may also occur in large patches. The location of valley needlegrass grassland is depicted on Figures 6 and 7 and in Attachment B. Disturbed Habitat: Disturbed habitat are areas that lack vegetation entirely or support only sparse, weedy species. The location disturbed habitat is depicted on Figures 6, 7, 8, and 9 and in Attachment B. Page 43 - - Potenti.lly Polonti.11y Siplficant Laa Ih.o Siplfi..nl Unl... Sipifi..nl No Imput Miliptee! Imp.ct Imp.ct TABLE 1 UPLAND HABITAT IMPACTS Habitat Alignment Borrow Area Total Coastal Sage Scrub 4.09 acres 7.14 acres 11.23 acres Disturbed Goastal Sage Scrub 1.08 1.08 Maritime Succulent Scrub 4.25 0.87 5.12 Disturbed Maritime Succulent Scrub 4.62 4.62 Valley Needlegrass Grassland 3.04 2.14 Disturbed Habitat 0.03 0.03 Does not include 2.43 acres of coastal sage scrub in Sunbow. Upúind Impads Disturbance of coastal sage scrub and maritime succulent scrub associated with grading and construction of the roadway may result in impacts to gnatcatcher and cactus wren populations in the project area. The California gnatcatcher is listed by USFWS as a threatened species and the cactus wren is listed as a species of special concern by the California Department of Fish and Game. Both species are covered by the MSCP. The Cooper's Hawk and the White-Tailed Kite have also been sited in the project area. Both of these species are listed by the California Department ofFish and Game as species of special concern. Impacts to habitat utilized by these species may result in impacts to their viability in the project area. Implementation of Mitigation Measures identified below will reduce impacts to sensitive species to a less than significant level. Wetland Impads Implementation of the proposed project will result in impacts to wetland habitats within Poggi Canyon. Impacts to wetlands will occur as the natural drainage system through Poggi Canyon is altered by construction of the roadway. Table 2 depicts the wetland habitat acreage impacted and proposed mitigation ratio/acreage. Page 44 - - Potenüally Potenüally Significant Leu than Significant Unl... Significant No Impa.t Mitigated Impa.t Impact TABLE 2 WETLAND IMPACT ACREAGE AND PROPOSED MITIGATION Impacted Replacement Habimt Impacted (acre Miti2ation Ratio Created (acre) Habitat (on-site) Non-wetland 1.02 1 1.02 Southern Willow Waters of the Scrub/Mule Fat U.S. (includes Scrub Open Water) Disturbed 4.29 1 4.29 Southern Willow Scrub/ Herbaceous Mule Fat Scrub Wetland Coastal 2.04 1.42 2.89 Coastal Freshwater Freshwater Marsh/Southern Marsh Willow Scrub Mule Fat Scrub 0.50 1.5 0.75 Mule Fat Scrub Southern Willow 0.06 3 0.18 Southern Willow Scrub Scrub Riparian . 0.05 3 0.15 Southern Willow Scrub Woodland A jurisdictional wetland delineation was prepared for the proposed project site using routine on-site determination protocols of the 1987 Army Corps of Engineers (A CO E) manual (Environmental Laboratory 1987). The detailed technical report is titled "Jurisdictional Wetland Delineation for the Olympic Parkway Project" (Merkel & Associates, Inc. January 26, 1999) and is provided in Attachment C of this document. The purpose of the wetlands delineation was to determine the extent of jurisdictional wetland habitats on-site and to determine the potential impacts to these wetland resources from development. The wetland delineation effort also identified non-wetland waters under federal jurisdiction and streambeds under the jurisdiction of the CalifoqIia Department of Fish and Game (CDFG). Wetlands and jurisdictional waters existing in the study area are regulated under one or both of the following: Section 404 of the Clean Water Act (U.S. Army Corps of Engineers) covering discharge of dredged or fin materials into the Waters of the United States; and Section 1600 et seq. of the California Fish & Game Code which addresses alterations of streambeds. Non-wetland Waters of the u.s. are jurisdictional waterways that exhibit wetland hydrologic characteristics. These areas may be inundated during the wetter portion of the year by normal storm events, but lack either or both the hydrophytic vegetation or hydric soil conditions required to define wetlands under federal regulatory programs. Open Water is a subcategory of Non-wetland waters. Five wetland vegetation types were mapped including Herbaceous Wetland, Coastal Freshwater Marsh, Mule Fat Scrub, Southern Willow Scrub, and Riparian Woodland. Jurisdictional Non-wetland Water of the U.S. were also mapped. Page 45 - - Potentially POlelltially Siplificant Las than Significant Unl... SipiflCllnt No Impa.t Mitigated Impa.t Impact Herbaceous Wetland Approximately 4.29 acres of Herbaceous Wetland exist on-site. Herbaceous Wetlands are located along the main drainage throughout the project site. Coastal Freshwater Marsh Small stands of Coastal Freshwater Marsh vegetation are located sporadically along the main drainage. These stands, along with lar.ger areas of Freshwater Marsh located on the eastern portion of the project site, totaled 2.04 acres. This habitat type primarily consisted of Broad-leaf Cattail (Typha latifolia), which is an obligate wetland species. Occasionally, stand of California Bulrush (Scirpus californica), another wetland obligate species, occurred along with the Cattail. Mule Fat Scrub Approximately 0.50 acre of Mule Fat Scrub is located on-site. Mule Fat Scrub was mapped for several areas dominated by stands of Mule Fat (Baccharis salicifolia). This FA WC species occurred along drainages in several areas on-site. Southern Willow Scrub Southern Wïllow Scrub vegetation occurred at a few locations on-site (along the main drainage), yielding a total acreage of 0.06 acres. Gooding's Black Willow (Salix gooddingil), an obligate wetland species, was the dominant plant of this vegetation type in one area. The other areas of Southern Willow Scrub were comprised of Arroyo Willow (Salix lasiolepis), a FACW species. Ripariau Woodland Approximately 0.05 acre of Riparian Woodland is located on-site. This habitat type is characterized by several individual large willows. These trees are barren and most likely dead; however, the understory of these areas consisted of dense stands of Coastal Freshwater Marsh or Mule Fat Scrub vegetation types. Non-wetland Waters Areas devoid of wetland vegetation and soils, but showing evidence of flow or soil saturation, were identified (mapped) as Open Water or Non-wetland Waters of the U.S. These areas are under the jurisdiction ofCDFG and ACOE as Streambed and Non-wetland Waters of the U.S., respectively. Approximately 0.25 acres of Open Water and 0.77 acres of Non-wetland Waters, yielding a total of 1.02 acres ofthese jurisdictional types exist on-site. Wetlands Functions and Values The site's jurisdictional wetlands and non-wetland waters primarily occur along the central drainage of Poggi Canyon. In general, wildlife value is considered low for most wetland habitats given the lack of wetland vegetation within the canyon. The limited wetland on the site are valuable to a variety of animals such as the Pacific Chorus Frog and California toad. Sensitive bird species such as the Coastal California Gnatcatcher and Cactus Wren, although sage scrub associates, will also utilize wetland habitats. Various raptor species including the Golden Eagle forage over the area and were seen during the wetland delineation using snags and several large trees for perch sites. Page 46 - - Pot...ü.Uy Poteati.Uy Signlfiant Las th.n Signlfiant Unl... Signifiant No Jmpnt Mitig.ted Jmpnt Imp.ct Expected Impacts to Wetlands The proposed project will result in impacts to approximately 7.91 acres of Water of the U.S. consisting of 4.29 acres of Herbaceous Wetland., 2.04 acres of Coastal Freshwater Marsh, 0.50 acre of Mule Fat Scrub, 0.06 acre of South em Willow Scrub, 0.05 acre of Riparian Woodland, and 1.02 acres of Non- wetland Waters (including areas of Open Water). Wetland Permitting Requirements - The project will result in impacts to water and/or streambeds that fall under both state and federal regulatory programs. Under Section 404 of the Clean Water Act, placement of dredged or fill material within Waters of the U.S. requires a permit issued by the ACOE. The Clean Water Act also requires the issuance of a state water quality certification or waiver under Section 401 to be issued by the Regional Water Quality Con1rol Board for any action that may result in degradation of the waters of the State. In addition to the federal act requirements, the proposed work would constitute an alteration of a streambed and falls under the jurisdiction of CDFG pursuant to Section 1600 et seq. of the California Fish and Game Code. The creation of a new, larger natural drainage channel provides an opportunity to create a more viable, enhanced wetland than exists in the canyon today. The impact to wetlands in Poggi Canyon can be mitigated on-site. A small interim drainage ditch will be created on a portion of the southern side of the roadway in addition to the permanent drainage proposed for the north side of the roadway. Significant vegetation may begin to reestablish within this interim drainage should the drainage be left undisturbed over an extended period. The City is requesting as part of the wetland permit application that any mitigation agreements negotiated with the resource agencies address this potential future "wetland" issue, in an effort to avoid the need to obtain additional permits for the interim drainage at the time development occurs to the south of the roadway and this interim drainage facility is improved. The applications for the wetland permits; however, does not include a wetland mitigation acreage at this time for the interim drainage channel as the specific amount of wetland acreage impacted associated with the interim drainage is unknown. Additionally, early consultations with the U.S. Army Corps of Engineers has indicated that any impact to the interim facility would be viewed as a permanent impact due to the estimated 5 to 10 year timeframe before grading would occur on the south side of the road, removing the interim drainage facility. BIOLOGICAL RESOURCES MITIGATION Sunbow Mitigation for the Sunbow portion of the Olympic Parkway alignment is completed and is not part of the proposed project. A wetland mitigation plan has been prepared, is approved by the Resource Agencies, and is currently being implemented within the Sunbow property. A mitigation plan that addresses upland impacts for the portion of Olympic Parkway that 1raverses the Sunbow alignment has been approved as well and no further mitigation related to the construction of Olympic Parkway within the Sunbow property is required. Otay Ranch Mitigation measures identified in the SPA One EIR are summarized below: Page 47 - - Potentially Potentially Significant Leu than Significant Unless Significant No Impact Mitipted Impact Impact . Because a majority of the impacts to biological resources resulting from the grading and construction of the roadway and Borrow Area (I) occur within Otay Ranch properties, significant impacts to biological resources would be mitigated through adherence to the requirements of the Otay Ranch Resource Management Plan (RMP) (phases I and 2), and the San Diego Multiple Species Conservation Program (MSCP). The Phase 2 RMP establishes a series of standards for preservation of species and habitats to be applied project-wide for Otay Ranch and provides for the preservation of regionally significant wildlife corridors. Components of the Ph~e 2 RMP relevant to impacts to biological resources associated with construction of the proposed roadway include the Coastal Sage Scrub Restoration Master Plan and Restoration Analysis and the Biota Monitoring Program. These Phase 2 RMP components are intended to mitigate direct impacts from development of the entire Otay Ranch (with the exception of direct unavoidable impacts to the coastal California gnatcatcher, cactus wren). The San Diego Multiple Species Conservation Program (MSCP) was approved by the City of San Diego in March 1997 and by the County of San Diego in October 1997 with approval by the City of Chula Vista expected in 1999. The MSCP defines a Multiple Habitat Planning Area (MHP A) within which an open space preserve is ultimately to be assembled, primarily for the conservation of biological resources within southwestern San Diego County. Open space planned within Otay Ranch is considered by the wildlife agencies to be an integral component of the MHP A and, as part of the planning effortJor the MSCP, the wildlife agencies and Otay Ranch landowner( s) conducted negotiations to determine the appropriate configuration of open space on Otay Ranch to achieve consistency with the goals of the MSCP. Those negotiations concluded with an agreement executed by the wildlife agencies on February 22, 1996. The agreement resulted in changes in the Otay Ranch preserve configuration from that delineated in the Otay Ranch GDP approved on October 23, 1993. The agreement allows the "take" of habitat in Poggi Canyon (Olympic Parkway alignment) in exchange for open space in the Proctor VaHey and San Ysidro Mountain parcels. Wetland Permits . Impacts to Waters of the U.S. such as those located within portions·ofPoggi Canyon, will require a pennit from the U.S. Army Corps of Engineers for the discharge of dredged or fiH material pursuant to Section 404 of the federal Clean Water Act. Water Quality Certification (pursuant to Section 401 of the federal Clean Water Act) will also be necessary from the California Water Quality Control Board. Additionally, under the California Department ofFish and Game Code Section 1600, any obstruction, diversion, or alteration to any stream, streambed, adjacent riparian habitat, and sometime contiguous upland habitat requires an agreement with the California Department of Fish and Game. Impacts occurring within the project area will require a 1601 agreement. Wetland Mitieation . Wetland impacts will be mitigated through the creation of wetland habitat within the new, larger drainage to be located on the north side of Olympic Parkway. A conceptual wetland mitigation plan has been prepared for the proposed project, and is included as part of the U.S. Army Corps of Engineers Section 404 Pennit. The proposed wetland mitigation site occurs adjacent to Olympic Parkway within the reconstructed Poggi Canyon channel. As proposed, the 7.91 acres of jurisdictional waters will be off-set by the creation of 9.28 acres of wetlands. The goal of the revegetation effort is to create a multi-layered willow riparian woodland and mulefat scrubland Page 48 - --. Potentially Potenti.lly SignlfiC8nt Leu th.n SignifiC8nt Unl... SignifiC8nt No Imp.ct Mitig.ted Imp.ct Imp.ct with freshwater marsh habitat components interspersed with willow woodlands along the central core of the reconstructed Poggi Canyon channel. The mitigation proposed excludes all hard structures, roadway crossings, maintenance areas, and utility alignments crossing the channel, although these areas are expected to develop similar wetland functions and values between period of maintenance and would contribute to the overall function of the system. Table 2 depicts the impact acreage and proposed wetland mitigation for the project. Attachment C depicts a typical section of the mitigation concept. Overall. the mitigation lands are expected to provide greater functions and values than most of the existing wetlands within the project site. -. Eastlake No wetland or upland mitigation is necessary as this portion of the alignment is void of jurisdictional wetlands and sensitive upland habitat. vm. ENERGY AND MINERAL RESOURCES. Would the proposal: a) Conflict with adopted energy conservation plans? 0 0 0 181 b) Use non-renewable resources in a wasteful and 0 0 0 181 inefficient manner? c) If the site is designated for mineral resource 0 0 0 181 protection, will this project impact this protection? Comments: Response to VIDa. The proposed project involves construction of a roadway and will not involve excessive use of non-renewable resources and therefore will not conflict with adopted energy conservation plans. No impact to this issue was identified in the Sunbow .-1), Otay Ranch SPA One EIR (95-01), and Eastlake Greensffrails Re-Planning Program SEIR . . as it relates to the construction or operation of the Olympic Parkway. Response to VIIIb. The project will require fuel, steel, and aggregate materials for construction. However, the operation of the roadway will require only minimal use of energy for roadway lighting purposes, and will not result in the use of non-renewable resources in a wasteful and inefficient manner. The project will be coordinated with grading of adjacent areas, to be utilized for borrow material, which will reduce length of trips from other regions. No impact to this issue was identified in the Sunbow 1ìIï-1), Otay Ranch SPA One ErR (95-01), and Eastlake Greensrrrails Re-Planning Program SEIR .. as it relates to the construction or operation of the Olympic Parkway. Response to VIIIc. The project site is not designated for mineral resource protection. No impact to this issue was identified in the Sunbow EI., Otay Ranch SPA One EIR (95-01), and Eastlake Greensffrails Re-Planning Program SEIR· as it relates to the construction or operation of the Olympic Parkway. Page 49 --_._~~ - -_.... Potentially Poleøtially Siplficant Leu than Significant Unless Significant No Impact Mitigated Impact Impact IX. HAZARDS. Would the proposal involve: a) A risk of accidental explosion or release of 0 0 0 181 hazardous substances (including, but not limited to: petroleum products, pesticides, chemicals or radiation)? b) Possible interference with an emergency response 0 0 0 181 plan or emergency evacuation plan? c) The creation of any health hazard or potential 0 0 0 181 health hazard? d) Exposure of people to existing sources of potential 0 0 0 181 health hazards? e) Increased fire hazard in areas with flammable 0 0 0 181 brush, grass, or trees? Comments: Response to IXa. The proposed project will not result in the use of hazardous substances, no impact to this issue is anticipated. While vehicles transporting hazardous waste may utilize the proposed roadway ,such use will not significantly increase the risk of release of hazardous substances, as drivers will be required to comply with federal, state, and local regulations related to the handling and use of hazardous materials. The use of hazardous materials in the grading and construction of the proposed roadway will also be subject to compliance with applicable federal, state, and local regulations. The project will not result in a risk of accidental explosion or release of hazardous substances. Response to IXb. The project will create an additional roadway to be utilized as part of an emergency response or evacuation plan, potentially enhancing rather than interfering with such plans. Response to IXc. The proposed project is a roadway, and will not create any health hazard or potential health hazard. Response to IXd. No known health hazards exist in the vicinity of the project site. Therefore, the project will not result in the exposure of people to existing sources of potential health hazards. Sunbow The Sunbow EIR (88-1) did not address issues related to hazards; however, no hazardous materials are known, or have been identified within the Sunbow portion of the alignment. Otay Ranch According to the Otay Ranch GDP EIR 90- I, there are no soils in the project area with contamination levels above state and federal threshold levels, and no hazardous materials have been identified in the project area. The area has been historically used for dry fanning (i.e., grazing); use of hazardous materials associated with this type of fanning is minimal. Page 50 - - Potentially Potentially Significant Leu than Significant Unl... Significant No Impact Mitigated Impact Impact Eastlake The Eastlake Greensffrails Re-Planning Program SEIR (97-04) did not address issues related to hazards; however, no hazardous material are known, or have been identified within the Eastlake portion of the alignment. As with the Otay Ranch property, and this area has been historically used for dry farming (i.e., grazing); use of hazardous materials associated with this type offarming is minimal. Response to IXe. The proposed project will not result in a significant increase in fire hazards associated with flammable brush, grass, or trees. The project will not introduce fire into significant stands of vegetation. Any increase in the potential for fire hazards on-site will be reduced to a less than significant level through compliance with the City's brush management requirements. The specific requirements for the proposed roadway will be developed through consultation with City fire departments during subsequent design phases. The City's NCCP 4(d) permit requires thinning and pruning of fire management zones rather than clearing and grubbing. X. NOISE. Would the proposal result in: a) Increases in existing noise levels? 0 181 0 0 b) Exposure of people to severe noise levels? 0 181 0 0 Page 51 - - Potentially Potentially Significant Leu than Significant Unleu Siplficant No Impact Mitigated Impact Impact Comments: Response to Xa. The proposed project will result in increased noise levels in the project area during grading, construction and operation. Grading and construction will involve the use of graders, scrapers, bulldozers, excavators, backhoes, front-end loaders, pavers, and heavy trucks. Construction noise will be temporary in nature and will be reduced to a less than significant level with implementation noise mitigation measures intended to prevent noise levels from rising above the City's threshold for what is acceptable. - Sun-bow The Sunbow EIR (88-1) does not address short-term construction noise. Oto.y Ranch As identified in the SPA One EIR (95-01), Toads will be constructed first (for development of SPA One), which will involve the use of graders, scrapers, bulldozers, excavators, backhoes, front-end loaders, pavers, and heavy trucks. Noise levels for equipment which might be used for construction range from approximately 68dB(A) to 105dB(A) at a distance of 50 feet from the source. Noise levels typically decrease at a rate of approximately 6 dB(A) per doubling of the distance from the noise source. Implementation of mitigation identified below would reduce the impact to a level less than significant. Eastlake The Eastlake Greensrrrails Re-Planning Program SEIR_ does not address short-tenn construction noise. Response to Xb. Operation of the roadway will also result in increased noise levels as a result of the introduction of vehicular traffic into the area. The increase in noise levels in the project area generated by vehicular traffic associated with future land development projects de'scribed in earlier referenced EIRs would impact future development along the corridor; however the developments that will be abutting the roadway have been planned to avoid significant noise level impacts. Sunbow Sunbow EIR (88-1) identifies that on-site (within the planned Sunbow development) future noise levels attributed to cumulative traffic volumes will exceed standards and will require noise attenuation mitigation. No specific noise levels from the Olympic Parkway were identified; however, traffic volumes and associated noise levels would be similar to segments of Olympic Parkway that traverse SPA One, with the 65 CNEL contour occurring approximately 500 feet away from the roadway centerline. Oto.y Ranch The Otay Ranch SPA One ErR provides the most detailed infonnation regarding the noise levels projected for the roadway. As indicated in the SPA One EIR, the 65 CNEL contour is approximately 500 feet away from the roadway centerline. The primary method of noise mitigation for the proposed roadway is the construction of sound walls surrounding residential areas that abut the roadway. The Page 52 - - Potentially Potentially Significant Leu than Significant Unleas Siplficant No Impact Mitigated Impact Impact NOISE MITIGATION Sunbow No specific noise mitigation measures are identified; Sunbow EIR (88-1) identifies, "specific measures to be identified in future implementation stages." OtayRanch - 1. During construction and grading the following measures shall be complied with: 1) Grading and construction shall be limited to Monday through Saturday between the hours of 7a.m. and 5p.m. 2) All grading and construction equipment shall be equipped and maintained with effective muffler systems, subject to the approval of the City Engineer. Muffler systems shall conform to the Environmental Protection Agency's Noise Control Program (part 204 of Title 40, Code of Federal Regulations). 3) Construction equipment shall be located as far away from existing residential uses as . practical. . Noise barriers shall be provided where residential unmitigated noise levels will exceed 65 dBA CNELILdn. This barrier shall be a minimum 6 foot high solid barrier placed at minimum setback line where possible. The barrier can be a 6' masonry wall, 6' earthen berm, or other suitable material to provide noise attenuation (i.e.,plexiglass). Landscaping shall be utilized on or adjacent to the wall as determined to be appropriate by the Planning Department to minimize visual impacts of the wall. . Prepare a site specific noise study prior to construction to determine the potential impacts of the roadway adjacent uses. Long term mitigation will take place in the form of noise barriers on site. Eastlake No short-term construction noise mitigation measures were identified. Long term mitigation will take place in the form of noise barriers on site, as well as construction of homes with noise attenuating materials to achieve an interior 45dB(A). XI. PUBLIC SERVICES. Would the proposal have an effect upon, or result in a need for new or altered government services in any of the following areas: a) Fire protection? 0 0 0 ~ b) Police protection? 0 0 0 181 c) Schools? 0 0 0 181 Page 53 "~~,. - - Potentially Potentially Significant Las than Significant Unl... Significant No Impact Mitigated Impact Impact d) Maintenance of public facilities, including roads? 0 0 f8I 0 e) Other governmental services? 0 0 0 f8I Comments: Response to XIa. The proposed project will not generate an increase in dwelling units or population in the project area. Therefore, the proposed roadway will not result in a need for new or altered fire protection facilities or serviées. Response to XIb. The proposed project will not generate an increase in dwelling units or population in the project area. Therefore, the proposed roadway will not result in a need for new or altered police protection facilities or services. Response to XIc. The proposed project will not generate an increase in dwelling units or population in the project area. Therefore, the proposed roadway will not result in a need for new or altered school facilities or services. Response to XId. The proposed project involves the construction of a new roadway which would require both regular and emergency maintenance. The project will therefore result in the need for an expansiòn of public services to maintain the roadway. The degree to which maintenance services would need to be expanded would be less than significant, however, as construction of the roadway has been identified as part of the City's General Plan and Growth Management Plan forecasts. The City will be able to provide an adequate level of roadway maintenance service to this roadway. Response to XIe. The proposed project will not result in a need for any other new or altered governmental services. xu. THRESHOLDS. Will the proposal adversely 0 0 0 f8I impact the City's Threshold Standards? As described below, the proposed project does not adversely impact any of the Threshold Standards. a) FireÆMS 0 0 0 f8I The Threshold Standards requires that fire and medical units must be able to respond to calls within 7 minutes or less in 85% of the cases and within 5 minutes or less in 75% of the cases. Comments: Because the proposed project does not generate dwelling units or population in the project area, it will not adversely impact City of Chula Vista Threshold Standards for FirelEMS. The City of Chula Vista has indicated that this threshold standard will be met, since the nearest fire station is approximately 4 miles away and would be associated with a 4 to 7 minute response time (Rod Hastie - Chula Vista Fire Department). The proposed project will comply with this Threshold Standard. . Police 0 0 0 f8I Page 54 - - Potentially Potentially Significant Leu than Significant Unless Significant No Impact Mitigated Impact Impact The Threshold Standards require that police units must respond to 84% of Priority 1 calls within 7 minutes or less and maintain an average response time to all Priority 1 calls of 4.S minutes or less. Police units must respond to 62.10% of Priority 2 calls within 7 minutes or less and maintain an average response time to all Priority 2 calls of 7 minutes or less (Richard Preuss - Chula Vista Police Department). The proposed project will comply with this Threshold Standard. Comments: Because the proposed project does not generate dwelling units or population in the project area, it will not adversely impact City of Chula Vista Threshold Standards for Police. c) Traffic D D D 181 The Threshold Standards require that all intersections must operate at a Level of Service (LOS) "C" or better, with the exception that Level of Service (LOS) "D" may occur during the peak two hours of the day at signalized intersections. Intersections west ofl-80S are not to operate at a LOS below their 1987 LOS. No intersection may reach LOS "E" or "F" during the average weekday peak hour. Intersections of arterials with freeway ramps are exempted from this Standard. Comments: Because the proposed project does not generate dwelling units or population in the project àrf?a, it will not adversely impact City of Chula Vista Threshold Standards for Traffic. The proposed project will comply with this Threshold Standard as it will improve traffic on the surrounding roadways, specifically, the project will alleviate existing and future projected traffic volumes on Telegraph Canyon Road by providing an additional east-west connection. According to the "Draft Olympic Parkway Roadway and Intersection Phasing Analysis" (BRW Group, July 30,1999), all intersections on Olympic Parkway will operate at LOS D or better with the phased implementation of intersection geometries as recommended in the report. d) ParksIRecreation D D D 181 The Threshold Standard for Parks and Recreation is 3 acres/I ,000 population. The proposed project will comply with this Threshold Standard. Comments: Because the proposed project does not generate dwelling units or population in the project area, it will not adversely impact City of Chula Vista Threshold Standards for ParkslRecreation. e) Drainage D D D 181 The Threshold Standards require that storm water flows and volumes not exceed City Engineering Standards. Individual projects will provide necessary improvements consistent with the Drainage Master Planes) and City Engineering Standards. The proposed project will comply with this Threshold Standard. Comments: Because the proposed project does not generate dwelling units or population in the project area, it will not adversely impact City of Chula Vista Threshold Standards for Drainage. f) Sewer D D D 181 Page 55 - - Potentially Potentially SigDifieJlDt Leu than Siplficant Unl_ Significant No Impact Mitigated Impact Imp..,1 The Threshold Standards require that sewage flows and volumes not exceed City Engineering Standards. Individual projects will provide necessary improvements consistent with Sewer Master Plan(s) and City Engineering Standards. The proposed project will comply with this Threshold Standard simply in that the project itself will not generate a demand for sewer. The project includes the installation of the Poggi Canyon sewer within the roadway, which will serve the proposed developments along the alignment. Comments: Because the proposed project does not generate dwelling units or population in the project area, it will not adv~ely impact City ofChula Vista Threshold Standards for Sewer. g) Water 0 0 0 181 The Threshold Standards require that adequate storage, treatment, and transmission facilities are constructed concurrently with planned growth and that water quality standards are not jeopardized during growth and construction. The proposed project will comply with this Threshold Standard. Applicants may also be required to participate in whatever water conservation or fee off-set program the City of Chula Vista has in effect at the time ofbuiJding permit issuance. Comments: Because the proposed project does not generate dwelling units or population in the project area, it will not adversely impact City of Chula Vista Threshold Standards for Water services. XIII. UTILITIES AND SERVICE SYSTEMS. Would the proposal result in a need for new systems. or substantial alterations to the following utilities: a) Power or natural gas? 0 0 181 0 b) Communications systems? 0 0 0 181 c) Local or regional water treatment or distribution 0 0 0 181 facilities? d) Sewer or septic tanks? 0 0 0 181 e) Storm water drainage? 0 0 181 0 f) Solid waste disposal? 0 0 0 181 Comments: Response to XIIIa. The proposed roadway will utilize electricity for roadway lighting purposes. However the additional demand for electricity generated by the project will be less than significant. Response to XIllb. The proposed roadway will not result in a need for new communications systems, or result in alterations to existing systems. Response to XIIIc. The proposed roadway will not require the use of water treatment or distribution facilities. Therefore, the project will not result in a need for new systems or substantial alterations to local or regional water treatment or distribution facilities. Page 56 - - Potentially Potentially SigDifi..nt Leu than Signifi..nt Un..... SigDifi..nt No Impact Mitigated Impact Impact Response to XlDd. The proposed project will not require sewer or septic facilities for operation as no residential, or non-residential development is proposed as part of the project. Therefore, the project will not result in a need for new systems or substantial alterations to se~er or septic tanks. The project includes the installation of the Poggi Canyon sewer within the roadway, which will serve the proposed developments along the alignment. Response to XlDe. The proposed project will require a stonn water drainage system to control surface runoff, as Poggi Canyon will be modified and a new channel will be constructed parallel to the proposed roadway. Impactsto stonn water drainage due to increased stonnwater flows from the proposed roadway will be less than significant; however, as the drainage control plan for the roadway will address stonnwater runoff and drainage control. The [mal size and design of the detention basin will be detennined with preparation of final grading plans and will be designed to accommodate a 100- year frequency stann. Runoff from the portion of the roadway immediately adjacent to the Land Swap parcel located east of SPA One and south of Eastlake Greens will be directed into existing drainage facilities within Eastlake Parkway. Response to XIIIf. The proposed roadway will not generate solid waste, and therefore will not result in the need for new systems or substantial alterations to solid waste disposal facilities. Page 57 - - Potentially Potentially Sigulficant Leu than Sigulficant Unl... Siguificant No Impact Mitigated Impact Impact XIV. AESTHETICS. Would the proposal: a) Obstruct any scenic vista or view open to the public D 0 ~ 0 or will the proposal result in the creation of an aesthetically offensive site open to public view? b) Cause the destruction or modification of a scenic 0 0 0 ~ route? c) Have a demonstrable negative aesthetic effect? 0 0 ~ 0 d) Create added light or glare sources that could 0 0 0 181 increase the level of sky glow in an area or cause this project to fail to comply with Section 19.66.100 of the Chula Vista Municipal Code, Title 19? e) Result in an additional amount of spill light? 0 0 181 0 Comments: Response to XIVa. Construction of the proposed roadway will result in short-term visual impacts due to landform alteration and grading operations. The Otay Ranch General Development Plan contains policies related to visual resources and landform modification which, if applied to construction for the entire length of the proposed roadway will reduce aesthetic impacts to a less than significant level. The construction and operation of the proposed roadway will not obstruct any scenic vista or view open to the public. Response to XIVb. The proposed project will not affect a scenic route. Response to XIV c. The proposed project will not create a demonstrable negative effect. Response to XIVd. The proposed project will result in the creation of a small amount of light and glare originating from lighting along the roadway and vehicles. However, the amount of light and glare introduced by this roadway will not significantly increase the level of light glow in the project area or cause the project to fail to comply with Chula Vista outdoor lighting requirements. Response to XIVe. The proposed project will not have a significant spill light impact in the project area. The project traverses several large, comprehensively planned communities. Each planned community document recognizes the future construction of the roadway and has been planned with proper setbacks and landscaping to address compatibility issues associated with the future roadway. While the project will involve road lighting and additional light will be generated by headlights, the impact to this issue is not considered significant. All project lighting must comply with lighting standards of Section 19.66.100 of the Chula Vista Municipal Code, Title 19. Page 58 _. - Potenû.lly PotentÌJIlly Significant Leu th.n Signlfi..nt Unleu SigDifiCllnt No Imp.c! Miûg.ted Imp.c! Imp.ct AESTHETICS MITIGATION Sunbow No specific mitigation has been identified in the Sunbow EIR (88-1); however, the Sunbow General Development Plan Design Guidelines contain grading standards. Otay Ranch .. No specific mitigation has been identified in the SPA One EIR (95-01). SPA One guidelines to address grading, which are applicable to the proposed project include: · Protection of graded slopes through utilization of proper erosion control measures (i.e. hydro seeding for landscaping of slopes); · Landscaping and design guidelines for the construction of roads through the project; · The retention of significant landforms as much as possible; · Utilization of grading that simulates the natural topography so that once the landscaping matures, manufactured slopes are not discernible from natural areas; · Utilization of contour grading for all grading that occurs in canyons and on hillsides; · Utilization of proper native and naturalizing landscape techniques to blend graded slopes with natural open space areas; · The preservation of prominent topographic features whenever possible; utilization of varying slope heights; · The modulation of long slopes; · The protection of natural features such as significant rock outcrops and trees (not applicable to SPA One); · Rounding of the tops and toes of slopes; · When slopes cannot be rounded, vegetation shall be used to alleviate sharp angular appearances; · When significant land forms are modified for project implementation, the land form should be rounded as much as possible to blend into the natural grade; · Manufacture slope faces over 25' shall be varied to avoid excessive "flat-planed" surfaces; · Grading shall be sensitive to significant and/or sensitive vegetation and habitat areas; · To complement landform grading, landform vegetation techniques will be utilized. As in a natural setting, major element of the landscape are concentrated largely in the concave "drainages," while convex portions are planted primarily with ground cover and minor materials. Page 59 ---- - - Potentially Potentially Significant Less than Significant Unless Significant No Impact Mitigated Impact Impact Eastlake .ifiC mitigation has been identified in the Eastlake Greensffrails Re-Planning Program SEIR . Compliance with the SPA Plan Design Guidelines involving architectural and site design, lighting, fencing, circulation, and comprehensive grading and landscaping plans, among other techniques would reduce visual impacts to a less than significant level. XV. CULTURAL RESOURCES. Would the proposal: - a) Will the proposal result in the alteration of or the D 181 D D destruction or a prehistoric or historic archaeological site? b) Will the proposal result in adverse physical or D 181 D D aesthetic effects to a prehistoric or historic building, structure or object? c) Does the proposal have the potential to cause a D D D 181 physical change which would affect unique ethnic cultural values? d) Will the proposal restrict existing religious or sacred D D D 181 uses within the potential impact area? e) Is the area identified on the City's General Plan EIR D 181 D D as an area of high potential for archeological resources? Comments: A review of existing archaeological infonnation was undertaken to establish the level of previous study with the Area of Potential Effect (APE) for the Olympic Parkway proposed alignment and associated borrow areas. Previous archaeological studies of projects within the area have included portions of the Olympic Parkway APE. These studies include "Otay Ranch Archaeological Survey" by RECON in 1989, "Otay Ranch Archaeological Survey: San Ysidro Mountains Parcel, Proctor Valley Parcel, Otay River Parcel" by RECON in 1990, "Draft Final Cultural Resources Evaluation of the 23,088-acre Otay Ranch" by Ogden in 1992, and "Results of an Archaeological Survey and the Evaluation of Cultural Resources at the Otay Ranch Sectional Planning Area One and Annexation Project" by Brian F. Smith and Associates in 1995. Within the project APE, where surveys have been completed, 11 archaeological sites have been recorded. Ten oftbese sites, SDI-4258, SDI-ll, 387H, SDI-12,466, SDI-13,867, SDI-13,868, SDI- 13,869, SDI-13,870, SDI-12,465, SDI-12,771H and SDI-13,865 have been tested and found to be not significant. Based on the infonnation derived from various archaeological studies, the APE for the project will include 10 non-significant and one significant cultural resources. The significant site, SDI-13,872H is important under CEQA criteria for the infonnation potential contained in the deposit of historic artifacts at the site. Destruction of the site during grading will be a significant adverse impact. The proposed roadway will not cause physical change which would affect unique ethnic or cultural values. No known religious or sacred uses currently take place on or immediately adjacent to the project site. Therefore, the proposed project will not restrict such uses. Page 60 - - Potentially Potentially Significant Leu th.n Significant Unl... Significant No Imp..t Mitig.ted Imp.ct Imp..! Cultural Resources Mitigation Discussion The proposed grading for Olympic Parkway will result in a direct adverse impact to SDI-13,872H. In order to reduce the impacts to a level below significant, measures must be implemented prior to grading to mitigate the adverse impacts. Ideally, the mitigation of impacts to significant cultural resources is always avoidance of the resource through project redesign. Because the alignment for the roadway is fixed, the only viable measure to mitigate the potential impacts to SDI-13,872H is the recovery of sufficient artifacts and mitigation from the significant deposit to exhaust the research potential of the site. Therefore, to mitigate the adverse direct impacts to SDI-13,872H, a data recovery program will be necessary. As a condition of approval for the road project, the mitigation of impacts to cultural resources should include a requirement for a data recovery program at SDI-13,872H. The requirement should include a statement that a research design should be prepared and submitted to the City of Chula Vista. This research design will serve as a guide for the excavations at the site and for the research effort needed 10 reduce the significance of impacts by exhausting the research potential of the site. Generally, the research design will include discussions of the general plan to recover data from the historic deposit, the quantity and locations of excavations, the types of field work needed to successfully recover data, the types of laboratory analyses to be conducted, preservation techniques for historic artifacts, and procedures to be implemented to conduct the field work and to deal with special situations that may arise, such as encountering foundations or other features. The research design will include the specific research 'questions or directions of research that will be applied to the information generated by the recovery effort All of the information from the fieldwork, laboratory analysis, and research will be presented in a technical report to the City. The tasks of the research design are noted below: · Preparation of a research plan that explicitly provides research questions that can reasonably be expected to be addressed by excavation, or historic research and documentation, and subsequent analysis of collected data. · A statement of the types of data that can reasonably be expected to be recovered from the site or from historic research, or both, and how that information will be used to address the research orientation. · A step-by-step discussion of field, laboratory, and/or archival research methods to be employed. This will include the archaeological sampling strategy, or method of documentation in the case of historic sites, methods of excavation, specialized studies to be employed, laboratory techniques, and methods for the synthesis and interpretation of recovered data. · Provisions for the permanent curation of recovered artifacts, photographs, notes, documents, and other related materials must be clarified. A memorandum of agreement with an appropriate institution may be necessary to formalize the curation plan in accordance with state and local mandates. · Site-specific mitigation recommendations must be accompanied with a requirement that archaeological monitoring of all grading and excavations associated with the construction ofthe new roadway is necessary in order to identify any masked or buried cultural resources. Should previously undocumented cultural resources be encountered during the monitoring program, significance testing and mitigation of impacts to significant resources would be required as appropriate. Page 61 - - Potenüally Potentially Signlfio:ant Leu than Sicnifio:ant Ualeu Signlfio:ant No Impa.t Miügated Impa.t Impact XVI. PALEONTOLOGICAL RESOURCES. Will the 0 181 0 0 proposal result in the alteration of or the destruction of paleontological resources? Comments: Sunbow The Sunbow General Development Plan area is underlain by both the San Diego formation and the Otay formation. Becausetliere is a high possibility that paleontological resources will be encountered within these formations during earthwork activities, a potentially significant impact to paleontological resources is anticipated in this area. Otay Ranch The portion of the roadway and the borrow areas that traverses the SPA One area is underlain by the San Diego formation and the Otay formation, and therefore contains areas of high sensitivity and moderate sensitivity (Le., there is a moderate possibility that this area contains paleontological resources). Impacts to paleontological resources may occur in this area if earthwork activities associated with roadway construction cut into geological deposits (formations) within which fossils are buried. Other impacts might include burial of a fossiliferous locality by fill operations or causal fossil collecting by amateur collectors. Because SPA One is underlain by areas of high and moderate sensitivity for paleontological resources, a significant impact to paleontological resources is anticipated. Eastloke The Otay Formation underlies the Eastlake"Land Swap" parcel which is traversed by the proposed roadway. This formation is considered to possess high sensitivity for paleontological resources. High sensitivity means there is a high possibility that the area contains paleontological resources within the geological formation. Areas of the Otay Formation may be exposed during grading and construction activities associated with the proposed project. Exposure of this formation would likely result in the unearthing of fossil remains. Iflef! unprotected, the loss of these fossils would represent a significant impact. PALEONTOLOGICAL RESOURCES MITIGATION 1. Prior to approval of grading permits, the applicant shall confirm to the City of Chula Vista that a qualified paleontologist has been retained to carry out an appropriate mitigation program. (A qualified paleontologist is defined as an individual with an M.S. or Ph.D. in paleontology or geology who is familiar with paleontological procedures and techniques). The palaeontologist shall attend pre-grade meetings to consult with grading and excavation contractors. Page 62 - - Potentially Potentially Significant Leu than Significant Unl... Significant No Impact Mitl.aled Impact Impact 2. A paleontological monitor shall be on-site at all times during the original cutting of previously undisturbed sediments of highly sensitive geologic formations (i.e. San Diego and Otay formations) to inspect cuts for contained fossils. (A paleontological monitor is defmed as an individual who has experience in the collection and salvage of fossil materials.) The paleontological monitor is defmed as an individual wh has experience in the collection and salvage of fossil materials.) The paleontological monitor shall work under the direction of a qualified paleontologist. The monitor shall be on-site on at least a half-time basis during the original cutting of previously undisturbed sediments of moderately sensitive geologic formations (i.e., unnamed river terrace deposits) to inspect cuts for contained fossils. 3. When fossils are discovered, the paleontologist (or paleontological monitor) shall recover them. 4. Prepared fossils along with copies of all pertinent field notes, photos, and maps shall be deposited in a scientific institution with paleontological collections such as the San Diego Natural History Museum. A final summary report shall be completed which outlines the results of the mitigation program. This report shall include discussions of the methods used, stratigraphy exposed, fossils collected, and significance of recovered fossils. XVII. RECREATION. Would the proposal: a) Increase the demand for neighborhood or regional 0 0 0 ~ parks or other recreational facilities? b) Affect existing recreational opportunities? 0 0 0 ~ c) Interfere with recreation parks & recreation plans or 0 0 0 ~ programs? Comments: Response to XVlla. The proposed project will not result in additional residential development and corresponding population and therefore would not increase the demand for neighborhood or regional parks or other recreational facilities. Response to XVIIb. The proposed project will not result in a population increase which would affect existing recreational opportunities. Response to XVIIc. The proposed project will in no way interfere with recreation parks and recreation plans or programs. xvm. MANDATORY FINDINGS OF SIGNIFICANCE: See Negative Declarationjor mandatory findings of significance. If an EIR is needed, this section should be completed. Page 63 - - Potentially Potenüally Significant Leu than Significant Unl... Sipificant No Impact Miügated Impact Impact a) Does the project have the potential to degrade the 0 ~ 0 0 quality of the environment, substantially reduce the habitat of a fish or wildlife species, cause a fish or wildlife population to drop below self-sustaining levels, threaten to eliminate a plant or animal community, reduce the number or restrict the range of a rare or endangered plant or animal or eliminate important examples of the major periods or California history OJ: prehistory? Comments: b) Does the project have the potential to achieve short- 0 0 0 ~ term, to the disadvantage of long-term, environmental goals? Comments: c) Does the project have impacts that are individually 0 0 0 ~ limited, but cumulatively considerable? ("Cumulatively considerable" means that the incremental effects of a project are considerable when viewed in connection with the effects of past projects, the effects of other current projects, and the effects of probable future projects.) Comments: d) Does the project have environmental effect which 0 0 0 ~ will cause substantial adverse effects on human beings, either directly or indirectly? Comments: Page 64 .,~,--~ - - XIX. PROJECT REVI~_ ..INS OR MITIGATION MEASURES: The mitigation measures listed in Attachment A have been incorporated into the project and will be implemented during the design, construction or operation of the project. xx. AGREEMENT TO IMPLEMENT MITIGATION MEASURES By signing the line(s) provided below, the Applicant(s) and/or Operator(s) stipulate thattbey have each read, understood and have their respective company's authority to and do agree to the mitigation measures contained herein, and will implement same to the satisfaction of the Environmental Review Coordinator. Failure to sign the line(s) provided below prior to posting of this [Mitigated] Negative Declaration with the County Clerk shall indicate the Applicants' and/or Operator's desire that the Project be held in abeyance without approval and that Applicant(s) and/or Operator(s) shall apply for an Environmental Impact Report. t.J.l.F/"'ÞS!,P ~JA>It:l'I?'# ~ tErr &,*¡1:II!f!!(Z- Printed Name and Title of Authorized Representative of [Property Owner's Name] ~~~2veOf ~ Date [property Owner's Name] Printed Name and Title of [Operator if different from Property Owner] SigDature of Authorized Representative of Date [Operator if different from Property Owner] XXI. ENVIRONMENTAL FACTORS POTENTIALLY AFFECTED: The environmental factors checked below would be potentially affected by this project, involving at least one impact that is a "Potentially Significant Impact" or "Potentially Significant Unless Mitigated," as indicated by the checklist on the following pages. o Land Use and Planning o Transportation/Circulation o Public Services o Population and Housing ~ Biological Resources o Utilities and Service Systems ~ Geophysical o Energy and Mineral Resources ~ Aesthetics ~ Water o Hazards ~ Cultural Resources ~ Air Quality ~ Noise o Recreation ~ Mandatory Findings of Significance Page 65 - - xxn. DETERMINATION: On the basis of this initial evaluation: I fmd that the proposed project COULD NOT have a significant effect on the 0 environment, and a NEGATIVE DECLARATION will be prepared. I find that although the proposed project could have a significant effect on the r8I environment, there will not be a significant effect in this case be~use the mitigation measures described on an attached sheet have been added to the project. A MITIGATED NEGATIVE DECLARATION win be prepared. I fmd that the proposed project MA Y have a significant effect on the environment, and an 0 ENVIRONMENTAL IMP ACT REPORT is required. I fmd that the proposed project MAY have a significant effect(s) on the environment, but 0 at least one effect: 1) has been adequately analyzed in an earlier document pursuant to applicable legal standards, and 2) has been addressed by mitigation measures based on the earlier analysis as described on attached sheets, if the effect is a "potentially significant impacts" or "potentially significant unless mitigated." An ENVIRONMENTAL IMPACT REPORT is required, but it must analyze only the effects that remain to be addressed. I find that although the proposed project could have a significant effect on the 0 environment, there WILL NOT be a significant effect in this case because all potentiany significant effects (a) have been analyzed adequately in an earlier EIR pursuant to applicable standards and (b) have been avoided or mitigated pursuant to that earlier EIR, including revisions or mitigation measures that are imposed upon the proposed project. An addendum has been prepared to provide a record of this determination. fJ~~./ 2)1:¿! '/1 SIgnature Date Douglas D. Reid Environmental Review Coordinator City of Chula Vista Page 66 - - ATTACHMENT A Mitigation Measures - - ATTACHMENT A MITIGATION MEASURES GEOPHYSICAL MITIGATION 1. The recommendations contained in the "Preliminary Geotechnical Evaluation Olympic Parkway Feasibility Study" shall be implemented as part of project grading and construction. As identified in the Preliminary Geotechnical Evaluation a comprehensive subsurface evaluation, including development-specific subsmface exploration and laboratory testing is recommended to be perfonned to aid design and construction of future roadway improvements. The purpose of the subsurface evaluation is to assess subsurface geotechnical conditions and to provide specific data regarding potential geotechnical hazards and constraints, as well as infonnation pertaining to the engineering characteristics of underlying earth materials. From these data, specific geotechnical recommendations for grading/earthwork, slope stability, surface and subsurface drainage, pavement design, drainage and other geotechnical design considerations can be prepared. The following identifies the preliminary geotechnical recommendations to address alluvium, landslides, slope stability, Excavatability, gr01mdwater, liquefaction and dynamic settlement, soil corrosivity and expansive soil. Alluvium - The majority of the proposed alignment is underlain by significant depths of compressible and liquefaction-susceptible alluvium. Feasible earthwork options include removal and recompaction of compressible alluvium, dewatering as needed, and removal recompaction down to the water table. Surcharge the remaining saturated alluvial section to achieve stable density for roadway support and minimal liquefaction potential. Detailed geotechnical sampling and testing will be required to model surcharge effectiveness, particularly the imposed load/settlement-time relationships. Landslides - Further investigation of the landslide features mapped and possible features identified from aerial photographs/topography needs to l?e performed to evaluate the potential for slope failures adjacent to the proposed alignment. Some of these features may require stabilization orremoval during grading. In some cases, possible landslides identified in geotechnical studies of the area may not represent a landslide hazard. Slope Stabžlžty - In general, cuts in the granular formational materials should be grossly stable at gradients of 2: I (horizontal to vertical). Considerable erosion and gullies were observed on the newly cut slopes located on the south side of Poggi Canyon in the Sunbow development. Planting these slopes should help reduce surficial stability and erosion problems. Grading plans for the canyon roadway have not been firialized. Cut and fill slopes descending into the canyon shall be evaluated for gross and surficial mability. Excavatabžlžty - Alluvial materials found in Poggi Canyon should be excavatable with conventional grading equipment. Formational materials in the eastern area of the project will likely contain scattered concretionary materials which could require local heavy ripping. Special handling of the oversize material in the fill will probably be required. Groundwater - Canyon areas to receive fill should have subdrains installed to reduce and control potential future seepage out of the slopes. Where fill embankments are planned for Olympic Parkway A-I City of Chula Vista Initial Study February 1999 - - both the planned parkway and the Poggi Creek drainage, consideration should be given to installing a subdrain at the base of the alluvial removals and prior to fill placement. Dewatering may be required as part of the remediation of the underlying alluvium. Liquefaction and Dynamic Settlement - Subsurface exploration and associated laboratory testing shall be performed during the design phase of the roadway to evaluate the liquefaction and dynamic settlement potential of on-site soils. It is possible that liquefaction will have limited impact on the planned parkway. Under these circumstances, consideration can be give to reading minor damage to roadways rather than totally mitigation against any potential movement. Ifliquefaction of underlying soils is found to be a significant problem, mitigation of already graded area could include stone piles, compaction grouting or other ground modification techniques. Soil Corrosivity - Soils within the alignment have been identified as corrosive with respect to both ferrous metals and concrete. Further testing shall be performed to determine the extent of the corrosive materials so that improvements can be designed accordingly. Expansive Soi/- Soils exhibiting expansive characteristics are present within the formational materials, residual/colluvial soils and alluvium. Expansive soils also have generally poor engineering characteristics. Selective grading shall be performed to prevent these materials from being placed within 5 feet of the final grade of the proposed roadway. If expansive sòils are exposed in cut portions of the roadway, these materials should be under cut 5 feet and replaced with non-expansive materials. WATER MITIGATION Sunbow The Sunbow EIR (88-1) identifies the project's increase in impervious surfaces from development including roadway construction will result in increased runoff. Flow contributions may impact facilities associated with the Telegraph and Poggi Canyon basins, requiring upgrading as mitigation. Water quality impacts are also identified with the proposed project urban development and associated urban pollutants. Implementation of measures contained in Sunbow EIR 88-01, as well as standard City grading and construction procedures/requirements would mitigate project drainage and water quality impacts to a level less than significant. Otay Ranch As identified in the SPA One EIR, potentially significant water resources impacts resulting from development in the project area can be reduced to a less than significant level through the use of Best Management Practices and through the implementation of mitigation measures. Mitigation measures identified in the SPA One EIR include the following: 1. Prior to the issuance of grading permits and during grading the applicant shall comply with all applicable regulations established by the United States Environmental Protection Agency as set forth in the National Pollutant Discharge Elimination System (NPDES) permit requirements for urban runoff and stormwater drainage and any regulations adopted by the City ofChula Vista pursuant thereto. The City ofChula Vista and County of San Diego have Olympic Parkway A-2 City ofChula Vista Initial Study February 1999 - - a Municipal Permit from the State Regional Water Quality Control Board (RWQCB) for stormwater discharge. In order to be covered under NPDES Municipal Permit No. CA 0108758, the proposed developed area will be required to mitigate impacts to stormwater quality. In addition, RWQCB has issued one general permit that applies to construction activity. In order to be covered under the Construction General Permit, a Notice of Intent (NOl) must be filed with R WQCB. Compliance with the Permit requires that a stormwater pollution plan be prepared and implemented for the project. Best management practices, design, treatment, and monitoring for stormwater quality must be addressed with respect to Municipal and Construction Permits. EastIake 4.4.4.1 Hydroseeding and landscaping of any cut/fill slopes disturbed or built during the construction phase of (the Eastlak:e Trails project) with appropriate ground cover vegetation would be performed within 30 days of completion of grading activities. 4.4.4.2 Areas of native vegetation or adjoining slopes to be avoided during grading activities . would be delineated to minimi7.e disturbance to existing vegetation and slopes. 4.4.4.3 Artificial ground cover, hay bales, and catch basins to retard the rate of runoff from manufactured slopes would be installed if grading occurs during wet weather season (November I through April 1). 4.4.4.4 Fine particulates in geologic materials used to construct the surficial layers of manufactured slopes would not be specific unless a suitable alternative is not available. 4.4.4.5 Temporary sedimentation and de silting basins between graded areas and streams would be provided during grading. 4.4.4.6 Detention basins, effective for very large drainage areas. These are essentially ponds with controlled release rates to minimize downstream effects. Some pollutants can settle during storage and improve the quality of water released. 4.4.4.7 Infiltration basins, designed to hold runoff and allow percolation into the ground. These basins need adequate storage volume and good permeability of the underlying soils. 4.4.4.8 Infiltration trenches and dry wells, holes, or trenches filled with aggregate and then covered. Dry wells are typically used for runoff from roofs; infiltration trenches typically serve larger areas, such as streets and parking lots in commercial areas. Both are best suited for areas with permeable soils and a sufficiently low water table or bedrock. 4.4.4.9 Porous pavement such a lattice pavers or porous asphalt. These may be used to replace large areas of paving that are not subject to heavy traffic. 4.4.4.10 Vegetative controls. Plant materials which intercept rainfall and filter pollutants and absorb nutrients. Olympic Parkway A-3 City ofChula Vista Initial Study February 1999 - - 4.4.4.11 Grassed swales, shallow grass-covered channels used in place of a buried storm drain. This type of vegetative control is most applicable to residential areas. AIR QUALITY Sunbow Mitigation Measures identified in the Sunbow EIR (88-1), subject to City approval are: · Use of watering or other dust palliatives to reduce fugitive dust; emissions reductions of about 50 percent can be realized by implementation of these measures. · Hydroseeding, landscaping, or developing of disturbed areas as soon as possible to reduce dust generation. · Proper covering of trucks hauling fill material. · Enforcement of a 20 mile-per-hour speed limit on unpaved surfaces. · Use of heavy-duty construction equipment that is equipped with modified combustion/fuel injection systems for emission control. Otay BaRch Mitigation Measures identified in the Otay Ranch SPA One EIR (95-01), to reduce construction emissions are: · Minimize simultaneous operation of multiple construction equipment units (i.e., phase construction to minimize impacts). · Use low pollutant-emitting construction equipment. · Use electrical construction equipment as practical. · Use catalytic reduction for gasoline-powered equipment. · Use injection timing retard for diesel-powered equipment. · Water the construction area twice daily to minimize fugitive dust. · Stabilize (for example, hydroseed) graded areas as quickly as possible to minimize fugitive dust · Pave permanent roads as quickly as possible to minimize dust. Eastlake Mitigation Measures identified in the Eastlake GreensITrails Re-Planning Program. SEIR_, to reduce construction emissions are: 1. All unpaved construction areas shall be sprinkled with water or other acceptable San Diego APCD dust control agents during dust-generating activities to reduce dust emissions. Additional watering or acceptable APCD dust control agents shall be applied during dry weather or windy days until dust emissions are not visible. Emissions reductions of about 50 percent can be realized by implementation of these measures. 2. Trucks hauling dirt and debris should be properly covered to reduce windblown dust and spills. Olympic Parkway A-4 City of Chula Vista Initial Study February 1999 - - 3. Enforce a 20-mile-per-hour speed limit on unpaved surfaces. 4. On dry days, dirt and debris spilled onto paved surfaces shall be swept up immediately to reduce resuspension of particulate matter caused by vehicle movement. Approach routes to construction sites shall be cleaned daily of construction-related dirt in dry weather. 5. On-site stockpiles of excavated material shall be covered or watered. 6. Disturbed area shall be hydroseeded, landscaped, or developed as quickly as possible and as directed by the Citý to reduce dust generation. 7. Use low pollutant-emitting construction equipment. 8. Heavy-duty construction equipment with modified combustion/fuel injection systems for emissions control shall be utilized during grading and construction activities. 9. Equip construction equipment with prechamber diesel engines (or equivalent) together with proper maintenance and operation to reduce emissions of nitrogen oxide to the extent available and feasible. 10. Use electrical construction equipment, to the extent feasible. 11. Use catalytic reduction for gasoline-powered equipment. 12. The simultaneous operations of multiple construction equipment units shall be minimized (i.e., phase construction to minimize impacts). BIOLOGICAL RESOURCES Sunbow Mitigation for the Sunbow portion of the Olympic Parkway alignment is completed and is not part of the proposed project. A wetland mitigation plan has been prepared, is approved by the Resource Agencies, and is currently being implemented within the Sunbow property. A mitigation plan that addresses upland impacts for the portion of Olympic Parkway that traverses the Sunbow alignment has been approved as well and no further mitigation related to the construction of Olympic Parkway within the Sunbow property is required. Otay Ranch Mitigation measures identified in the SP A One EIR are summarized below and will be implemented through the Mitigation Monitoring and Reporting Program for SPA One: . Because a majority of the impacts to biological resources resulting from the grading and construction of the roadway and Borrow Area (1) occur within Otay Ranch properties, significant impacts to biological resources would be mitigated through adherence to the requirements of the Otay Ranch Resource Management Plan (RMP) (phases 1 and 2), and the San Diego Multiple Species Conservation Program (MSCP). The Phase 2 RMP establishes a series of standards for Olympic Parkway A-5 City ofChula Vista Initial Study February 1999 - - preservation of species and habitats to be applied project-wide for Otay Ranch and provides for the preservation of regionally significant wildlife corridors. . Components of the Phase 2 RMP relevant to impacts to biological resources associated with construction of the proposed roadway include the Coastal Sage Scrub Restoration Master Plan and Restomtion Analysis and the Biota Monitoring Program. These Phase 2 RMP components are intended to mitigate direct impacts from development of the entire Otay Ranch (with the exception of direct unavoidable impacts to the coastal California gnatcatcher, cactus wren). The San Diego Multipl~ Species Conservation Program (MSCP) was approved by the City of San Diego in March 1997 and by the County of San Diego in October 1997 with approval by the City ofChula Vista expected in 1999. The MSCP defmes a Multiple Habitat Planning Area (MHPA) within which an open space preserve is ultimately to be assembled, primarily for he conservation of biological resources within southwestern San Diego County. Open space planned within Otay Ranch is considered by the wildlife agencies to be an integral component of the MHP A and, as part of the planning effort for the MSCP, the wildlife agencies and Otay Ranch landowner( s) conducted negotiations to determine the appropriate configuration of open space on Otay Ranch to achieve consistency with the goals of the MSCP. Those negotiations concluded with an agreement executed by the wildlife agencies on February 22, 1996. The agreement resulted in changes in the Otay Ranch preserve configuration from that delineated in the Otay Ranch GDP approved on October 23, 1993. The agreement allows the "take" of habitat in Poggi, Canyon (Olympic Parkway alignment) in exchange for open space in the Proctor Valley and San Y sidra Mountain parcels. Wetland Permits . Impacts to Waters of the U.S. such as those located within portions of Poggi Canyon, will require a permit from the U.S. Army Corps of Engineers for the discharge of dredged or fill material pursuant to Section 404 of the federal Clean Water Act. Water Quality Certification (pursuant to Section 401 of the federal Clean Water Act) will also be necessary from the California Water Quality Control Board. Additionally, under the California Department of Fish and Game Code Section 1600, any obstruction, diversion, or alteration to any stream, streambed, adjacent riparian habitat, and sometime contiguous upland habitat requires an agreement with the California Department of Fish and Game. Impacts occurring within the project area win require a 1603 agreement. Wetland Mitie:ation . Wetland impacts will be mitigated through the creation of wetland habitat within the new, larger drainage to be located on the north side of Olympic Parkway. A conceptual wetland mitigation plan has been prepared for the proposed project, and is included as part of the U.S. Army Corps of Engineers Section 404 Permit. The proposed wetland mitigation site occurs adjacent to Olympic Parkway within the reconstructed Poggi Canyon channel. As proposed, the 7.91 acres of jurisdictional waters will be off-set by the creation of9.28 acres of wetlands. The goal of the revegetation effort is to create a multi-layered willow riparian woodland and mulefat scrubland with freshwater marsh habitat components interspersed with willow woodlands along the central core of the reconstructed Poggi Canyon channel. The mitigation proposed excludes all hard structures, roadway crossings, maintenance areas, and utility alignments crossing the channel, although these areas are expected to develop similar wetland functions and values between period of maintenance and would contribute to the overall function of the system. Table 2 Olympic Parkway A-6 City ofChula Vista Initial Study February 1999 -.-" - - depicts the impact acreage and proposed wetland mitigation for the project. Appendix Adepicts a typical section of the mitigation concept. Overall, the mitigation lands are expected to provide greater functions and values than most of the existing wetlands within the project site. Eastlake No wetland or upland mitigation is necessary as this portion of the alignment is void of jurisdictional wetlands and sensitive upland habitat. - NOISE Sunbow No specific noise mitigation measures are identified; Sunbow EIR (88-1) identifies, "specific measures to be identified in future implementation stages." Otay Ranch 1. During construction and grading the following measures shall be complied with: 1) Grading and construction shall be limited to Monday through Saturday between the hours of7a.m. and 5p.m. 2) All grading and construction equipment shall be equipped and maintained with effective mufller systems, subject to the approval of the City Engineer. Mufller systems shall conform to the Environmental Protection Agency's Noise Control Program (part 204 of Title 40, Code of Federal Regulations). 3) Construction equipment shall be located as far away from existing residential uses as practical. . Noise barriers shall be provided where residential unmitigated noise levels will exceed 65 dBA CNEL/Ldn. This barrier shall be a minimum 6 foot high solid barrier placed at minimum setback line where possible. The barrier can be a 6' masonry wall, 6' earthen berm, or other suitable material to provide noise attenuation (i.e.,plexiglass). Landscaping shall be utilized on or adjacent to the wall as determined to be appropriate by the Planning Department to minimize visual impacts of the wall. . Prepare a site specific noise study prior to construction to determine the potential impacts of the roadway adjacent uses. Long term mitigation will take place in the form of noise barriers on site. EastJake No short-term construction noise mitigation measures were identified. Long term mitigation will take place in the form of noise barriers on site, as well as construction of homes with noise attenuating materials to achieve an interior 45dB(A). Olympic Parkway A-7 City ofChula Vista Initial Study February 1999 -. - AESTHETIC Sunbow No specific mitigation has been identified in the Sunbow EIR (88-1); however, the Sunbow General Development Plan Design Guidelines contain grading standards. Otay Ranch No specific mitigation has been identified in the SPA One EIR (95-01). SPA One guidelines to address grading, which are applicable to the proposed project include: · Protection of graded slopes through utilization of proper erosion control measures (i.e. hydroseeding for landscaping of slopes); · Landscaping and design guidelines for the construction of TOadS through the project; · The retention of significant landforms as much as possible; · Utilization of grading that simulates the natural topography so that once the landscaping matures, manufactured slopes are not discernible from natural areas; · Utilization of contour grading for all grading that occurs in canyons and on hillsides; · Utilization of proper native and naturalizing landscape techniques to blend graded slopes with natural open space areas; · The preservation of prominent topographic features whenever possible; utilization of varying slope heights; · The modulation of long slopes; · The protection of natural features such as significant rock outcrops and trees (not applicable to SPA One); · Rounding of the tops and toes of slopes; · When slopes cannot be rounded, vegetation shall be used to alleviate sharp angular appearances; · When significant land forms are modified for project implementation, the land form should be rounded as much as possible to blend into the natural grade; · Manufacture slope faces over 25' shall be varied to avoid excessive "flat-planed" surfaces; · Grading shall be sensitive to significant and/or sensitive vegetation and habitat areas; Olympic Parkway A-8 City of Chula Vista Initial Study February J 999 _. - . To complement landform grading, landform vegetation techniques will be utilized. As in a natural setting, major element of the landscape are concentrated largely in the concave "drainages," while convex portions are planted primarily with ground cover and minor materials. Eastlake iiIIific mitigation has been identified in the Eastlake GreensfTrails Re-Plannine; Program SEIR . Compliance with the SPA Plan Design Guidelines involving architectural and site design, lighting, fencing, circulation, and comprehensive grading and landscaping plans, among other techniques would reduce visual impacts to a less than significant level. CULTURAL RESOURCES Cultural Resources Mitigation Discussion The proposed grading for Olympic Parkway will result in a direct adverse impact to SDI-13,872H. In order to reduce the impacts to a level below significant, measures must be implemented prior to grading to mitigate the adverse impacts. Ideally, the mitigation of impacts to significant cultural resources is always avoidance of the resource through project redesign. Because the alignment for the roadway is fixed, the only viable measure to mitigate the potential impacts to SDI-13,872H is the recovery of sufficient artifacts and mitigation from the significant deposit to exhaust the research potential of the site. Therefore, to mitigate the adverse direct impacts to SDI-13,872H, a data recovery program will be necessary. As a condition of approval for the road project, the mitigation of impacts to cultural resources should include a requirement for a data recovery program at SDl -13 ,872H. The requirement should include a statement that a research design should be prepared and submitted to the City of Chula Vista. This research design will serve as a guide for the excavations at the site and for the research effort needed to reduce the significance of impacts by exhausting the research potential of the site. Generally, the research design will include discussions of the general plan to recover data from the historic deposit, the quantity and locations of excavations, the types of field work needed to successfully recover data, the types of laboratory analyses to be conducted, preservation techniques for historic artifacts, and procedures to be implemented to conduct the field work and to deal with special situations that may arise, such as encountering foundations or other features. The research design will include the specific research questions or directions of research that will be applied to the information generated by the recovery effort. All of the information from the fieldwork, laboratory analysis, and research will be presented in a technical report to the City. The tasks of the research design are noted below: · Preparation of a research plan that explicitly provides research questions that can reasonably be expected to be addressed by excavation, or historic research and documentatio~ and subsequent analysis of collected data. · A statement of the types of data that can reasonably be expected to be recovered from the site or from historic research, or both, and how that information will be used to address the research orientation. · A step-by-step discussion offield, laboratory, and/or archival research methods to be employed. This will include the archaeological sampling strategy, or method of documentation in the case Olympic Parkway A-9 City of Chula Vista Initial Study February] 999 .- - of historic sites, methods of excavation, specialized studies to be employed, laboratory techniques, and methods for the synthesis and interpretation of recovered data. . Provisions for the permanent curation of recovered artifacts, photographs, notes, documents, and other related materials must be clarified. A memorandum of agreement with an appropriate institution may be necessary to formalize the curation plan in accordance with state and local mandates. . Site-specific mitigation recommendations must be accompanied with a requirement that archaeological monitoring of all grading and excavations associated with the construction of the new roadway is necessary in order to identify any masked or buried cultural resources. Should previously undocumented cultural resources be encountered during the monitoring program, significance testing and mitigation of impacts to significant resources would be required as appropriate. PALEONTOLOGICAL RESOURCES 1. Prior to approval of grading permits, the applicant shall confirm to the City of Chula Vista that a qualified paleontologist has been retained to carry out an appropriate mitigation program. (A qualified paleontologist is defined as an individual with an M.S. or Ph.D. in paleontology or geology who is familiar with paleontological procedures and techniques). The palaeontologist shall attend pre-grad meetings to consult with grading and excavation contractors. 2. A paleontological monitor shall be on-site at all times during the original cutting of previously undisturbed sediments ofhighly sensitive geologic formations (i.e. San Diego and Otay formations) to inspect cuts for contained fossils. (A paleontological monitor is defined as an individual who has experience in the collection and salvage of fossil materials.) The paleontological monitor is defined as an individual wh has experience in the collection and salvage of fossil materials.) The paleontological monitor shall work under the direction of a qualified paleontologist. The monitor shall be on-site on at least a half-time basis during the original cutting of previously undisturbed sediments of moderately sensitive geologic formations (i.e., unnamed river terrace deposits) to inspect cuts for contained fossils. 3. When fossils are discovered, the paleontologist (or paleontological monitor) shall recover them. 4. Prepared fossils along with copies of all pertinent field notes, photos, and maps shall be deposited in a scientific institution with paleontological collections such as the San Diego Natural History Museum. A final summary report shall be completed which outlines the results of the mitigation program. This report shall include discussions of the methods used, stratigraphy exposed, fossils collected, and significance of recovered fossils. Olympic Parkway A-JO City ofChula Vista Initial Study February ]999 .- - ATTACHMENTB Biology Exhibits Wetland Planting Section - - ATTACHMENTB Biology Exhibits Wetland Planting Section ;........,~-- ..~.;.". ..... - =? - .... .... . II -- ~ ""' < ~ .:¡J I < >< ¿ I z ð < ~ \.Î I 0 z 0 -5 I '" 8 ¡;¡ AVM)I}JVd :>ldWA'O '" < "" '" ;¡ ~ "" ..; t I 0 ~ :5 '" " ~ '" ¡;; '" ì: I ;¡ < ~ ;¡ i :¿ g :¿ '" .~ '" < u ~ i ;¡ '" 9 :t '" L_-_ ~ ~ < "" < \J - ""I:: -' '" ~ ~ < '" ~ _______ J +dòOI =t: --n---------------- .--..--.................-...-.....- -- 9NldV:)SONY1 AVMCJVOH : [J ~ ~ ... ~ I ~ I '" ð '" '" ~ ;¡ ¡;; ~ z ~ < w ~ '" ~ ~ :; z -' w Û 2 ð 0 '" ~ z < ~~ ¡;¡ < III 8 ¡;; b3 ~ 0 w-' 0 '" z :¿12 !i .5 :J 0 0- ~ :55 - :¿ :¿ '" ~ ~ >- :¿ ~~ ;¡ w ~ -' ¡;; = Q "CI Q91 O<J ã 8- 0 - r/'J ~ eo.. :S 0 ... 8 '" ã 12 ð ü z ~ - 0 ø.c ~ :¿ :§ ~ 12 011 '" g .5 ~ t:I tš - '" ¡ þ( 5 .. ~ :¿ - . >- ¡;¡ ø.c .! :t C, 800.,8 - - II) = N e ~ I .c C, r/'J . ! "5 - c. a: '" 6 Þ '" '" Ä: z ~:¡ .... õ -' 0 0 g.... ¡;; § -,0 :5 ~~ þ( þ( ~~ ~ ~ '" III .. . QC9Q .! 0 C') < ~ '" 0 0 ~ :¿ u .... ~ .,., ::~ '" ",... ;¡ II ;¡.... ~ ...... ;¡o . ...- ~ - ~5 :5 ... 0 0 ".-.-.. - -. - ATTACHMENTC Wetland Delineation --- - - JURISDICTIONAL WETLAND DELINEATION FOR THE OLYMPIC PARKWAY PROJECT January 26, 1999 Prepared for: City of Chula Vista Planning Department 276 Fourth Avenue Chula Vista, CA 91910 Ph: (619) 585-5707; Fx: (619) 691-5171 Prepared by: Merkel & Associates, Ine. 3944 Murphy Canyon Road, Suite CI06 San Diego, California 92123 Ph: (619) 560-5465; Fx: (619) 560-7779 ..,- - - M&A # 97-122-03 - JURISDICTIONAL WETLAND DELINEATION FOR THE OLYMPIC PARKWAY PROJECT Prepared for: City of Chula Vista Planning Department 276 Fourth Avenue Chula Vista, CA 91910 Ph: (619) 585-5707 Fx: (619) 691-5171 Prepared by: Merkel & Associates, Inc. 3944 Murphy Canyon Road, Suite C-106 San Diego, California 92123 Ph: (619) 560-5465 Fx: (619) 560-7779 7did;:JJ Keith W. Merkel, Principal Consultant ~. In: W~~roI ..- - - Olympic Parlcway - Jurisdictional Wetland Delinearion M&:A # 97-122-03 T ABLE OF CONTENTS BACKGROUND AND 1NTRODUCTION .................................. I LOCATION ......................................................1 ~ ])~ATIj[)N ............ . . . . . . . . . . . . . . . . . . 1 . .. .. .. .. .. .. .. .. .. .. .. .. METHODS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1 .. .. .. .. .. .. .. .. .. .. .. .. .. .. Vegetation ............... . . . . . . . . . . . . . . . . . . . 3 .. .. .. .. .. .. .. .. .. .. .. .. Soils . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 Hydrology ...... . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 REsULTS .................................................... 4 Herbaceous Wetland. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Coastal Freshwater Marsh .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Mule Fat Scrub . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . 4 SouthernWillowScrub .....................................22 Riparian Woodland . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 Non-wetland Waters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 WETLANDS FuNcnONS AND VALUES ................................. 22 ExPECTED IMPACTS TO WETLANDS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 WETI.AND PERMrrrING REQUIREMENTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 IXI'ERATURE (;l"1"E1J .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24 LIST OF TABLES Table 1. Impacts to Wetlands and Non-wetland Waters . . . . . . . . . . . . . . . . . . . . . . . . . . 23 LIST OF FIGURES Figure 1. Project Vicinity Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 Figure 2, Sheet 1. Wetland and Jurisdictional Water Delineation. . . . . . . . . . . . . . . . . . . . . 5 Figure 2, Sheet 2. Wetland and Jurisdictional Water Delineation. . . . . . . . . . . . . . . . . . . . . 6 Figure 2, Sheet 3. Wetland and Jurisdictional Water Delineation. . . . . . . . . . . . . . . . . . . . . 7 Figure 2. Sheet 4. Wetland and Jurisdictional Water Delineation. . . . . . . . . . . . . . . . . . . . . 8 Figure 2, Sheet 5. Wetland and Jurisdictional Water Delineation. . . . . . . . . . . . . . . . . . . . . 9 Figure 2, Sheet 6. Wetland and Jurisdictional Water Delineation. . . . . . . . . . . . . . . . . . . . 10 Figure 2. Sheet 7. Wetland and Jurisdictional Water Delineation . . . . . . . . . . . . . . . . . . . . 11 Figure 2, Sheet 8. Wetland and Jurisdictional Water Delineation. . . . . . . . . . . . . . . . . . .. 12 Figure 2. Sheet 9. Wetland and Jurisdictional Water Delineation. . . . . . . . . . . . . . . . . . . . 13 Figure 2, Sheet 10. Wetland and Jurisdictional Water Delineation .... . . . . . . . . . . . . . .. 14 Figure 2. Sheet 11. Wetland and Jurisdictional WaterJ)elineation ...... . . . . . . . . . . . ., 15 Figure 2, Sheet 12. Wetland and Jurisdictional Water Delineation .., . . . . . . . . . . . . . . .. 16 Figure 2, Sheet 13. Wetland and Jurisdictional Water Delineation .... . . . . . . . . . . . . . . . 17 Figure 2, Sheet 14. Wetland and Jurisdictional Water Delineation ..... . . . . . . . . . . . . ., 18 Figure 2, Sheet 15. Wetland and Jurisdictional Water Delineation .... . . . . . . . . . . . . . ., 19 January 15, 1999 1 - - Olympic Parkway - Jurisdictional Wetland Delineation M&A # 97-122-03 Figure 2, Sheet 16. Wetland and Jurisdictional Water Delineation ... . . . . . . . . . . . . . . . . 20 Figure 2, Sheet 17. Wetland and Jurisdictional Water Delineation ., . . . . . . . . . . . . . . . . . 21 LIST OF APPENDICES Appendix 1. Wetland Data Forms Appendix 2. Wetland Photo Points o· ~ ~ JtlIIUIUY 15, 1999 11 - - Olympic Par/cway - Jurisdictional Wetland Delineation M&A # 97-122-03 JURISDICTIONAL WETLAND DELINEATION FOR THE OLYMPIC P ARKW A Y PROJECT BACKGROUND AND INTRODUCTION The subject of the proposed development is Olympic Parkway (an extension of East Orange Avenue). Olympic Parkway is a five.:mile long roadway which will provide regional access to 1-805 and SR-125 from the proposed development areas of the eastern territories of Chula Vista. The roadway crosses four major devlopment areas and is being developed as a regional transponation facility. In July 1998, an impact summary report was prepared by CottonlBelandlAssociates, Inc. as part of a feasibilty study. The 1998 report provided a detailed review of previous environmental documentation conducted within the alignment corridor for the Sunbow, McMillan, Otay Ranch, and Eastlake properties. The review identified the assumed alignment for Olympic Parkway within each Environmental Impact Report (EIR) and summarized the findings of these EIRs with regard to the environmental impacts and mitigation measures associated with Olympic Parkway. However, the environmental impacts associated with the construction of the entire roadway had not been addressed as a stand alone project. This wetland and jurisdictional waters delineation report addresses Olympic Parkway as a stand alone project and provides updated information regarding the extent and distribution of jurisdictional waters as well as anticipated impacts associated with the proposed roadway development. LOCATION The project site is located in the City of Chula Vista and occurs within Sections 17 and 18, Range 1 West, Township 18 South of the USGS 7.5' Imperial Beach Quadrangle. It also extends into unsectioned lands, Range 1 West, Township 18 South of the Otay Mesa Quadrangle; unsectioned lands and Section 3, Range 1 West, Township 18 South of the Jamul Mountains Quadrangle; and unsectioned lands, Range 1 West, Township 18 South of the National City Quadrangle (Figure 1). The roadway will be an extension of East Orange A venue, which currently terminates at Brandywine A venue. From East Orange Avenue, it runs eastward, through Eastlake Greens, and terminates at Hunte Parkway. The Olympic Parkway project mostly lies within Poggi Canyon, roughly paralleling Telegraph Canyon Road to the north. WETLAND DELINEATION METHODS A wetland delineation of the project site was conducted using routine on-site determination protocols of the 1987 Army Corps of Engineers (ACOE) manual (Environmental Laboratory 1987). Delineation work was performed by Merkel & Associates, Inc. (M&A) from January 5 through January 7, 1999. The purpose of this investigation was to determine the extent of jurisdictional wetland habitats on-site and to determine the potential impacts to these wetland resources from development. January 15. 1999 1 - r") -- 0 I I N N <1.> .... r- <·-~~VI/( U' (j \ j/ ). "Ø~~-" ~- '" ., -On . è / /: ' ../'( o( ~.- ..--- _..__ / ' ""'.' " .~ ...; "" ~"\r\ t.:.. -< :~ ~ \\,; ~"" ._::- _ ·i}¡~~é< - ~ ./'~<, ' . : ..; ¿ ~ 1 ~ I ,< , . -. ~. ': I ,'" ~ #- ~". --...; ~·;;;ín._::::_ --- - - . ,.' . I Q ...' . ~<...~ C .. .-..... "\ ~,_..:... ~ VJ ..., CU ..., ..................., , 0.0 ~ c"'. ....... \'" ';... .;~ /~ /{ ~ ; '5~.,(} c:: ~ C'; .... - "'0 ~ "i" '.-; ... I 'T. 0 ì ./··-41 C'; ~ . '" ,~ '" " - . ~ ! . ",' ¡,..: .,-.... . -t a ~ " '- - \ O_.c? .&.. < , \ ....; \: ..Lf.. ~ " u ~ 9.." Ó '_, ~~_ . \ '~ "\ ~ ,?, -./ .. ·'f ¿ ".', \'\ !' Y . __ ." ,.r_, V) \ . J\, \', "'..¿ ....;? 0 <1.> \ \ ,', . . \" , \ .... '" ~ ~) : /' ~ ¿ \ '" 'ì <'-' " -'.': " ~ ;>-, o " } \" ""[1,- <Ii I \ ... . C'; - \. \..., It to \. # ~ ...~ Õ .: . ! .;. 1'·... \ '\.J":. ~/ -'- 'L'\~ ! ¡"Z 0 ,: --.c", "'0 ! . ~ ',.... ~ / ..... ; .; ~..,~J/ ~ " ~ ë¡j .\ 'c\'¿ ....U/'f- ..c:: ~... .'" / ...... . --, . u '/ \ 'J' ~ C'; ., ·0 ,",,=:.. . '.'v<' CU '(""\'<::. ::, ',; ~p1.t! ¡ o.C!) eo: ë;j :;; ï: " u,' CU ~/ ~ 0.. ..... ...... c:: .- - = .; .~ Q ~ u ...... - U ~ C) - ..... 0 o .;:: "'. ;... C'; ~z _.- " vi' c:: K. E ,~ ~ 0 .-:: ¿ ~ ..... c:: C'; --. V') r- (/) 0 (/) ;:) Q) U ... ~ 0 CI) 8 .... \I :... u ~ VJ --.-.,-.-.-----. ._"_.~.., - - Olympic Parkway - Jurisdictional Wetland Delineation M&A # 97-122-03 The delineation made use of the physical evidence (vegetation. soils, and hydrologic indicators) exhibited on-site to define th~ presence and extent of jurisdictional wetlands and waterways. Wetland delineations of the property were performed using routine on-site determination protocols of the 1987 Army Corps of Engineers (ACOE) manual (Environmental Laboratory 1987). In addition. the delineation effort was expanded to identify non-wetland waters under federal jurisdiction and streambeds under the jurisdiction of the California Department of Fish and Game (CDFG). Evidence supporting jurisdictional determinations was recorded on wetland field data forms (Appendix 1). Photographs of representative jurisdictional waters, including wetlands. are provided in Appendix 2. Wetlands and other jurisdictional waterways were plotted on 1" = 100' scale topographic maps. Where the mapping scale was inadequate to show true jurisdictional widths, these have been noted on the map. The principal field delineators were M&A biologist, Kyle L. Ince. and biological technicians. Diana M. ErnIet and Vanessa A. Lee. Wetlands and jurisdictional waters existing in the study area are regulated under one or both of the following: Section 404 of the Clean Water Act (U .5. Army Corps of Engineers) covering discharge of dredged or fill materials into the Waters of the United States; and Section 1600 et seq. of the California Fish & Game Code which addresses alterations of streambeds. The following text describes the three parameters used to determine the presence/absence of wetlands and non-wetland water streambeds occurring on the site. Additional information addressing the overall delineation process and jurisdictional limits may be found in the federal delineation manual (EnviromnP.l1ml Laboratory 1987). state and federal enacting legislation. guidance provided by judicial interpretation. solicitors' opinions. and regulatory guidance issued to ACOE offices and CDFG field staff. Vegetation Vegetation communities which meet the criteria of wetland-associated vegetation were dominated by a preponderance of species classified as obligate wetland plants (OBL). facultative wetland plants (FACW). or facultative plants (FA C) based on the National List of Plant Species that Occur in Wetlands (USFWS 1991). Soils To confirm the presence of hydric soils, soil pits were excavated using a shovel. Soils taken from depths ranging from 12 to 18 inches were examined for physical and chemical evidence of hydric conditions. Excavated soils evaluated using the chroma indicies from the Munsell Soil Color Charts (Munsell Color 1974). but soil color is not used as the only indicator in the study area's mineral sandy soils. Other indicators of hydric soils such as vertical streaking, high organic matter content in the surface horizon. mottling. spodic zones, and organic pans were also sought during the survey. Hydrology *" *" Hydrologic wetland indicators included both surficial and subsurface characteristics. Included here were evidence of flow. soil saturation in the upper 12 inches, scouring around stationary objects. ponding, and accumulation of debris and sediments. Most of the site's flow information consisted of drainage patterns and flowing water. Other evidence includes water-damaged vegetation. accumulated JfJ1Ul(J1] 15. 1999 3 - - Olympic Parkway - Jurisdiaional Wetland Delinearion M&A # 97-122-03 debris around stationary objects, and localized erosion patterns. Non-wetland Waters of the U.S. are jurisdictional waterways that exhibit wetland hydrologic characteristics. These areas may be inundated during the wetter portion of the year by normal storm events, but lack either or both the hydrophytic vegetation or hydric soil conditions required to define wetlands under federal regulatory programs. Open Water, a subcategory of Non-wetland Waters, descnDeS areas where ponded or flowing water of substantial depth exist. Areas of Open Water also lack hydric vegetation. Fpr the purpose of this report Open Water is discussed as a type of Non- wetland Waters. REsuLTS Both ACOE and CDFG jurisdictional wetlands were delineated for the study area (Figure 2, Sheets 1- 17). Five wetland vegetation types were mapped including Herbaceous Wetland. Coastal Freshwater Marsh, Mu1e Fat Scrub, Southern Willow Scrub, and Riparian Woodland. Jurisdictional Non-wetland Waters of the U.S. were also mapped. The following discusses these habitats with regard to hydrophytic vegetation, hydric soils, and wetland hydrology . Herbaceous Wetland The survey revealed approximately 1.79 acres (78.037 M of Herbaceous Wetland on-site. Herbaceous Wetlands were found along the main drainage throughout the project site. This habitat type was mostly domin~too by Curly Dock (R1unex crispus). This FACW species occurred sporadically throughout the main drainage of Poggi Canyon; however, only areas dominated by this species (or sub-domin~terl with other wetland associates) were mapped. The stands of Curly Dock often occurred with other types of wetland-associated vegetation (FACW or FAC species). such as Grass Poly (Lythrum hyssopifolia), Perennial Ryegrass (Lolium spp.), and Cocklebur (Xanthium strumarium). The soils in these areas generally exhibited a low matrix color with evidence of gleyzation. Organic streaking was noted for sandy soils. In a few areas, the presence of hydric soils were assumed given the presence of both hydrophytic vegetation (F ACW or OBL species) and hydrology. Hydrology was indicated by the presence of flowing water, saturated soils, or drainage patterns. Coastal Freshwater Marsh Small stands of Coastal Freshwater Marsh vegetation occurred sporadically along the main drainage. These stands, along with larger areas of Freshwater Marsh located on the eastern portion of the project site, totaled 2.04 acres (88,659 ff). This habitat type primarily consisted of Broad-leaf Cattail (Typha latifolia), which is an obligate wetland species. Occasionally, stands of California Bulrush (Sdrpus califomica), another obligate species, occurred along with the Cattail. Hydrology was indicated by the presence of flowing water. Hydric soils were assumed given the predominance of obligate wetland species and the presence of flowing water. Mule Fat Scrub ~ ~ The survey revealed approximately 0.50 acre (21,704 if) of Mule Fat Scrub on-site. Mule Fat Scrub was mapped for several areas dominated by stands of Mule Fat (Baccharis salidfolia). This FACW January 15, 1999 4 -- ...- - « :¡ - tñ 0: ...:> < < .. ~ ~ !:5 - < fþ::> i'5 ~ t5 0: - 5 ~~<g~ ~ C'I '"- O~WUZ ~ III 0 O:O~/:~ !š "~..:JZ 15 CI ~ !!óo::>¡::<è c. ¡¡: D Oll>()::>~ 0 r-:> ~ 0. ,~~ " ~ .~ I: I I" 1\ ~ tfØ·: :¡i: I Ö ~ ¡;: .~ ¡:: ro.,,) ~ ~ ~ ED ~ ::> Q 0: ~~¡¡¡ofA ~ ~ ¡::! !Ii ~ ~ II> ~ C ~ ~ 8 ~ ~ ~"hJ ~ å ~ ~ ~ ¡¡¡ t!t! ~~~~ffi3 ~~ Im¡¡¡~Fw c-J õffi w ~55 ...!èro.,,} ~n".> t~ § .,~~~~ ~~ r-, .~ .~ I@I ~ "'ö L-1 ~ CI) ~ ~ .~ < ó ~ ~ ::! ~ ;:::::;3 > ~ ~~ W I/) ~ ~ '"ö ~ ~ - t! '"ö ~ t! f'-..;) "hJ ~ ~ '" '" '" oi >- a:: « ::> z « "'> ~ . u ~ ....... 01 ~ ~ ¡,) ¡:; ¿, Q). CD ~::: It) ö,j\ ãi' _ 0 ."" .,;'" q¡ -- u g ~ ~ c- 0 a: OJ ¡¡ -- 0 CI} 0 Oz fI) t< ... > ~ 8 ~ II> ~o,¡ ~ î ~ "O~C6 fOoo,.) ~ ~ :g Q,)or ~ ~or 01 ~~ ~ Q,) ~ ;! 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Ü I .. , ¡! ¡ ~ ~ -< ...J 0 m YJ 0 .! \o::li 8 ::J 5 ~ ~ :g i ¡ .,~z en II: 0 !i en ...¡¡..... t. i õ ~ ~Zl- .~..f")~ ! w.c: Z D:: <I( "ONfO :. u ~ < OJ IL t)g¡;¡~ \1 ~ ffi Œ ~ w 0 D: OJ )( .~cr LU ~~...J Cl)c ~ , ' z ~ e: æ @ 5) en ~ ð . ~ 8 ò I/') _v " ~ ::i! DO~Q,? " c: 0 ì ~~~~ . r _ ~. - [ ~ ,..Sè; ~ ¡....., ~ I ~œ - . , .. ( I- :.crç'-SO"V"UOA\OO'ee~:s 'HLVd - ... ."., "·/'·i..~ ~:s - ~ o,~ ! ª ._" ..~, '" '", .... CD U C·, :g-\. ~ ~ ... i:J ..'11:.< _ <> ·z··· ~ 1&1 .~ ~ ~ž-·- !š ~ ::ï ~ te ~ u .~ ~._-.Q IL. ,.::. . . ~ e· ·....:=1...., .~ ' . ..... ' . ~ ' "¡5 '" " m ¡: \ -, ~ . ~ \ q' / ~ ~ '- --- ..... - ~~ ö~ ~ ...:.¿ -.:. ' ~ ~ " ~-~ - ..... '- .' " " -',,-' .,., -.. ~'"ö ~ ...--' " ~ CI) , .,., . ~ '/ ~~ ' '" - .. '- '-- C) ...., .==-:: ' , ~ -- , "d ~- . ¡: .~. 'r / ö . , ..... ' " !, ~ ~.,J , f ~ ,"'~ " ~ ", , , ..... : ~ ~ '" '" '" ",' >- a:: 0( ::> ~ -;, I , r I f I . t) . V; , t: ~ '1·1' :~ ~ \ Q) ~ -+->" ~ ö III. I') ~ .... '& ~ ~ \ g&~ ~ '. II) C ... " II) ~ ð " ~ 6 ô It) " U co ~ '.'" .0,} ....!! It) ", '" 00 ê- ~ ó ",,'.," ~ ~.:¡ :- u... _ ......'" <0 hI') ~ ~ ~')/\-"-:<... seo\Saod\ os 'HlVd :IIICI"9~-SON~\ocreal -- , -----~- - - Olympic Parlcway - Jurisdictional Wetland Delineation M&A # 97-122-03 species occurred along drainages in several areas on-site. Most stands of Mu1e Fat were in close proximity to other types of wetland-associated vegetation. Soils exhibited a low matrix color with mottles. Organic streaking was observed in sandy soils. Hydrology was indicated by the presence of saturated soils, flowing water, or drainage patterns. Southern Willow Scrub Southern Willow Scrub vegetation occurred at a few locations on-site (along the main drainage), yielding a total acreage of 0.06 acre (2,559 ff). Goodding's Black Willow (Salix gooddingŽl), an obligate wetland species, was the dominant plant of this vegetation type in one area. The other areas of Southern Willow Scrub were comprised of Arroyo Willow (Salix lasiolepis), a FACW species. The soil was mostly loamy sand in these areas with a low matrix color and an aquic moisture regime. Hydrology was indicated by the presence of flowing water, saturated soils, or drainage patterns. Riparian Woodland The survey revealed approximately 0.05 acre (2,186 if) of Riparian Woodland. This habitat type was characterized by several individual large willows (Salix spp.). These trees were barren and most likely dead; however, the understory of these areas consisted of dense stands of Coastal Freshwater Marsh or Mule 'Fat Scrub vegetation types. Wetland hydrology was indicated by the presence of saturated soils. Non-wet1and Waters Areas devoid of wetland vegetation and soils, but showing evidence of flow or soil saturation, were mapped as Open Water or Non-wetland Waters of the U.S. These areas are under the jurisdiction of CDFG and ACOE as Streambed and Non-wetland Waters of the U.S., respectively. The survey identified 0.25 acre (10,832 ft2) of Open Water and 3.22 acres (140,197 ft2) of Non-wetland Waters, yielding a total of 3.47 acres (151,029 ft2) of these jurisdictional types on-site. WETLANDS FuNcnONS AND VALUES The site's jurisdictional wetlands and non-wetland waters primarily occur along the central drainage of Poggi Canyon. Soils mapped for the canyon consist of Linne clay loam and Diablo clay (Bowman 1973). These soils consist of well -drained, moderately deep to deep clays which typically occur in uplands (Bowman 1973). Most of the canyon is broad allowing for moderate to high groundwater recharge and floodflow alteration. Streambed stabilization would be considered low given the lack of wetland vegetation and/or rock which wou1d bind soil and dissipate erosive forces. Sediment/toxicant retention varies throughout the canyon. Relatively high retention value is given to areas near the eastern end of the canyon where a pond occurs and significant marsh vegetation was noted. Most of the western end of the canyon consisted of a narrow drainage ditch with sporadic patches of low- growing, herbaceous wetland vegetation. High nutrient transformation areas are those which retain or transform inorganic P anlor N in to their organic forms or transform N into its gaseous state. High nutrien1 transformation areas would be ãssociated with areas of low water velocity and presence of significant herbaceous vegetation which are found around ponds near the eastern end of Poggi Canyon. In general, wildlife value is considered low for most wetland habitats given the lack of wetland vegetation within the canyon. The limited wetlands on the site are valuable to variety of animals such as the Pacific Chorus Frog (Pseudacris regilla) and California toad (Bufo boreas halophilus). Sensitive January 15. 1999 22 ._~A".",~" - - Olympic Parkway - Jurisdictional Wetland Delinearion M&A # 97-122-03 bird species such as the Coastal California Gnatcatcher (Polioptila califomžca califomica) and Cactus Wren (Campylorhynchyus brunnežcapžllus), although sage scrub associates, will also utilize wetland habitats. Various raptor species including the Golden Eagle (Aquila chrysaetos) forage over the area and were seen using snags and several large trees for perch sites. ExPEcTED IMPACTS TO WETLANDS The proposed project involves a roadway development, which would include clearing of existing vegetation. grading, and fùling. The proposed development will result in impacts to approximately 7.91 acres of Waters of the U.S. consisting of 1.79 acres (78,037 if) of Herbaceous Wetland, 2.04 acres (88,659 if) of Coastal Freshwater Marsh, 0.50 acre (21,704 if) of Mule Fat Scrub, 0.06 acre (2.559 ft2) of Southern Willow Scrub, 0.05 acre (2,186 ft2) of Riparian Woodland, and 3.47 acres (151.029 if) of Non-wetland Waters (includes areas of Open Water). The following table summarizes quantities of wetland and non-wetland water resources existing. to be impacted and to be retained on the site. Table 1. Impacts to Wetland and Non-wetland Waters . Jurisdictional Type Existing (acre) Impacted (acre) Retained (acre) Herbaceous Wetland 1.79 1.79 0.00 Coastal Freshwater Marsh 2.04 2.04 0.00 Mule Fat Scrub 0.50 0.50 0.00 Southern Willow Scrub 0.06 0.06 0.00 Riparian Woodland 0.05 0.05 0.00 Non-wetland Waters of the U.S. 3.47 ·3.47 0.00 (Includes Open Water) Total 7.91 7.91 0.00 WETLAND PERMITTING REQUIREMENTS 1be project would result in impacts to waters and! or streambeds that fall under both state and federal regulatory programs. Under Section 404 of the Clean Water Act, placement of dredged or fill material within Waters of the U.S. requires a permit issued by the ACOE. The Clean Water Act also requires the issuance of a state water quality certification or waiver under Section 401 to be issued by the Regional Water Quality Control Board for any action that may result in degradation of the waters of the State. In addition to the federal act requirements, the proposed work would constitute an alteration of a streambed and would fall under the jurisdiction of CD FG pursuant to Section 1600 et seq. of the California Fish and Game Code. ~ ~ January 15. 1999 23 -.- - - Olympic Par1cway - Jurisdicrional Wetland D~lin~ation M&A # 97-122-03 LITERATURE CITED Bowman, Roy H. 1973. Soil Survey of the San Diego Area, California, Part I. U.S. Department of Agriculture. Soil Conservation Service and Forest Service. in cooperation with the University of California Agricultural Experiment Station, the U.S. Department of the Interior. Bureau of Indian Affairs, the Department of the Navy, United States Marine Corps. the Department of Housing and Urban Development, and the County of San Diego Planning Department. December. 1973. CottonlBelandl Associates, Inc. 1998. Olympic Parkway Feasibility Study - Impact Summary Report. July. 1998. Environmental Laboratory. 1987. Wetland Delineation Manual. January 1987. Munsell Color. 1974. Munsell Soil Color Charts. Macbeth, a Division of Kollmorgen Corporation, Baltimore. Maryland. U.S. Fish..& WIldlife Service. 1991. Wetland Delineation Manual, Appendix C. Section 1: National List of Plant Species that Occur in Wetlands, Region 0 - California "'" "'" JiJ1UIßTY 15, 1999 24 --- _. - APPENDIX 1 WETLAND DATA FORMS I ~ ~ Merlœl d: ÄS.SOCÏQIa. Inc. - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-l22-03) Date: l/S/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Kyle L. Ince & Vanessa A. Lee State: California Do normal circumstances exist on the site? DYes f8I No Community ill: NNG Is the site significantly disturbed (Atypical Situation)? DYes f8I No Transect ill: DP l Is the area a potential Problem Area? DYes f8I No Plot ID: PP 1. (If needed, explain on reverse.) ~ VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Bromus sp. Herb NI 9. 2. Feonic:ulum vulgare Shrub FACU 10. 3. Ricinus communis Shrub FACU II. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL,FACW or FAC (excluding FAC-). 0% Remarks: Non-native grassland. HYDROLOGY [8J Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: [8J Aerial Photographs o Inundated o Other o Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) o Drainage Patterns in Wetlands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o FAC-Neutral Test o Other (Explain in Remarks) Remarks: Soil is moist, but not saturated; No glistening epipedons. ~,~_.- - - SOILS Map Unit Name (Series and Phase): Diablo Clay (DaE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Chromic pelloxererts Confum Mapped Type? DYes 181 No Profile Descriotion: - Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-3 N/A 10YR 4/3 N/A N/A Clay loam 9-12 N/A lOYR 3/2 N/A N/A Clay loam Hydric Soil Indicators: o Histosol. o Concretions o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o SuJfidic Odor o Organic Streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List i. o Gleyed or Low-Chroma Colors o Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes 0 No 181 Wetland Hydrology Present? Yes 0 No 181 Hydric Soils Present? Yes 0 No 181 Is this Sampling Point Within a Wetland? Yes 0 No 181 Remarks: Grassy area abutting narrow drainage near western end of alignment; Normal circumstances do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 - .. DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-~22-03) Date: ~/5/99 Applicant/Owner: City of Chula Vista County; San Diego Investigator: Kyle L. Ince & Vanessa A. Lee State: California Do nonnal circumstances exist on the site? DYes 181 No Community ID: HW Is the site significantly disturbed (Atypical Situation)? DYes 181 No Transect ID: DP 2 Is the area a potential Problem Area? DYes 181 No Plot ID: PP 2 (Ifneeded, explain on reverse.) -. VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Bromus sp. Herb NI 9. 2 Rumexcrispus Herb FACW 10. 3. xanthium strumarium Herb PAC 11. 4. 12. 5. 13. 6. 14. 7. 15. ·8. 16. Percentage of Dominant Species that are OBL, F ACW or FAC (excluding F AC-). 66% Remarks: Herbaceous wetland. HYDROLOGY 181 Recorded Data (Descn"bed in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: 181 Aerial Photographs o Inundated o Other o Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) ~ Drainage Patterns in Wetlands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test o Other (Explain in Remarks) Rem~~: Soil moist, but not saturated. ._,- _0 - SOILS Map Unit Name (Series and Phase): Diablo Clay (DaE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Chromic Pelloxererts Confirm Mapped Type? DYes 181 No Profile Description: -. Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-3 N/A 10YR 4/3 N/A N/A Clay loam 9-12 N/A 10YR 3/2 N/A N/A Clay loam Hydric Soil Indicators: o Histosol, o Concretions o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o Sulfidic Odor o Organic Streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o G1eyed or Low-Chroma Colors o Other (Explain in Remarks) RæIDmks: Hydric soils presumed due to the presence of hydrophytic vegetation and hydrology. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes [81 No 0 Wetland Hydrology Present'? Yes [81 No 0 Hydric Soils Present? Yes [81 No 0 Is this Sampling Point Within a Wetland? Yes [81 No 0 Remarks: Herbaceous wetland; Normal circumstances do not exist on-site due to càttle grazing. Approved by HQUSACE 3/92 - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-~22-03) Date: ~/S/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Kyle L. Ince & Vanessa A. Lee State: California Do nonna! circmnstances exist on the site? DYes 181 No Community ill: HW Is the site significantly disturbed (Atypical Situation)? DYes 181 No Transect ill: DP 3 Is the area a potential Problem Area? DYes 181 No Plot ill: PP 3 (If needed, explain on reverse.) - VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Lythrum hyssopi£olia Herb FACW 9. 2 Rumex crispus Herb FACW 10. 3. Bromus sp. Herb NI 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, F ACW or F AC (excluding F AC-). 66% Remarks: Herbaceous wetland. HYDROLOGY t8J Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: t8J Aerial Photographs o Inundated o Other o Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) t8J Drainage Patterns in Wetlands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o FAC-Neutral Test o Other (Explain in Remarks) Remarks: Narrow drainage. .- - SOILS Map Unit Name (Series and Phase): Diablo Clay (DaE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Chromic pelloxererts Confirm Mapped Type? DYes 181 No Profile Descritrtion: - Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-8 N/A N/A N/A N/A Sand 8-12 N/A lOYR 2/2 N/A N/A Clay loam Hydric Soil Indicators: o Histosol, o Concretions o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o Sulfidic Odor o Organic Streaking in Sandy Soils o Aquic Moisture Regime D Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o Gleyed or Low-Chroma Colors o Other (Explain in Remarks) R~ks: Soil is moist, but not saturated; Soils assumed due to presence of hydrophytic vegetation and hydrology. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes 181 No 0 Wetland Hydrology Present? Yes 181 No 0 Hydric Soils Present? Yes 181 No 0 Is this Sampling Point Within a Wetland? Yes 181 No 0 Remarks: Herbaceous wetland; Normal circumstance do ~ot exist on-site due to cattle grazing. Approved by HQUSACE 3/92 .- -- DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-~22-03) Date: ~/5/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Kyle L. Inee & Vanessa A. Lee State: California Do nonna! circumstances exist on the site? DYes 181 No Community ill: HW Is the site significantly disturbed (Atypical Situation)? DYes 181 No Transect ill: DP 4 Is the area a potential Problem Area? DYes 181 No Plot ill: PP 4 (Ifneeded, explain on reverse.) - VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Rumex crispus Herb FACW 9. 2 Lactuca serriola Herb FAC 10. 3. unknown grass Herb NI 11. 4. Feoniculum vulgare Herb FACU 12. 5. 13. 6. 14. , 7. 15. 8. 16. Percentage of Dominant Species that are OBL, F ACW ,or F AC (excluding F AC-). 50% Remarlcs: Herbaceous wetland. HYDROLOGY 181 Recorded Data (Descn'bed in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: 181 Aerial Photographs o Inundated o Other 181 Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) o Drainage Patterns in Wetlands Depth to free Water in Pit 2 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test o Other (Explain in Remarks) Remarlcs: Open field with high water table. - - son.s Map Unit Name (Series and Phase): Diablo Clay (DaE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Chromic pelloxererts èonfum Mapped Type? DYes 181 No Profile Descriotion: Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (M1DlSell Moist) ( Ab\Dldance/Contrast) Texture, Concretions, Structure, etc. 0-J.2 N/A J.OYR 3/J. Gley Chart 5% Clay J. 2.5/5 GY Hydric Soil Indicators: o Histosol'" o Concretions o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o Sulfidic Odor o Organic.streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List 181 Gleyed or Low-Chroma Colors o Other (Explain in Remarks) Remarks: Low-chroma with evidence of gleyed soils. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes 181 No 0 Wetland Hydrology Present? Yes 181 No 0 Hydric Soils Present? Yes 181 No 0 Is this Sampling Point Within a Wetland? Yes 181 No 0 Rem~b: Herbaceous wetland in open field with high water table; Saturated soils and hydrophytic vegetation; Normal circumstances do not exist on site due to cattle grazing. Approved by HQUSACE 3/92 - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-~22-03) Date: ~/S/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Kyle L. Ince & Vanessa A. Lee State: California Do normal circumstances exist on the site? DYes 181 No Community ID: SWS Is the site significantly disturbed (Atypical Situation)? DYes 181 No Transect ID: DP 5 Is the area a potential Problem Area? DYes 181 No Plot ID: PP 5 (If needed, explain on reverse.) ~ VEGETATION Dominant Plant Species Stratmn Indicator Dominant Plant Species Stratum Indicator 1. Salix gooddingii 'I'ree OBL 9. 2 10. , 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. , Percentage of Dominant Species that are OBL, FACW orFAC (excluding FAC-). ~OO!¡ Remarks: One tree. HYDROWGY 181 Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: 181 Aerial Photographs r8I Inundated o Other r8I Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: 6 (in.) r8I Drainage Patterns in Wetlands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test o Other (Explain in Remarks) Remarks: Open water drainage. - - SOILS Map Unit Name (Series andPbase): Linne Clay Loam (LsE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confinn Mapped Type? DYes 181 No Haploxerolls -. Profile Descriotion: Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. Hydric Soillndicators: o Histosol. o Concretions o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o Sulfidic Odor o Organic Streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Redncing Conditions o Listed on National Hydric Soils List o Gleyed or Low-Chroma Colors o Other (Explain in Remarks) Remarks: Not necessary given dominance of obligate plant species. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes [gJ No 0 Wetland Hydrology Present? Yes [gJ No 0 Hydric Soils Present? Yes [gJ No 0 Is this Sampling Point Within a Wetland? Yes [gJ No 0 Remarks: Southern Willow Scrub; Normal circumstances do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 CaE Wetlands Delineation Manual) Project/S ite: Olympic Parkway (M&A # 97-l22-03) Date: l/S/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Kyle L. Ince & Vanessa A. Lee State: California Do normal circumstances exist on the site? DYes 181 No Community ID: FWM Is the site significantly disturbed (Atypical Situation)? DYes 181 No Transect ID: DP 6 Is the area a potential Problem Area? DYes 181 No Plot ID: PP 6 (If needed, explain on reverse.) - VEGETATION DominaDt Plant Species Stratum Indicator Dominant Plant Species S1ratum Indicator 1. Typba'J.atifolia Herb OBL 9. 2. 10. 3. 11. 4. 12. 5. 13. 6. 14. I 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW orFAC (excluding FAC-). loot Rem~: Fresh Water Marsh patch along open water drainage. HYDROLOGY f81 Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: f81 Aerial Photographs f81 Inundated o Other f81 Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: 6 (in.) o Drainage Patterns in Wetlands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test o Other (Explain in Remarks) Rem~: Open water channel. - - SOILS Map Unit Name (Series and Phase): Linne Clay Loam (LsE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic ConfÏnn Mapped Type? DYes 181 No Haploxerolls -. Profile DescriDtion: Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. Hydric Soil Indicators: o Histosor. o Concretions o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o Sulfidic Odor o Organic Streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o Gleyed or Low-Chroma Colors o Other (Explain in Remarks) Remarks: Not necessary given dominance of obligate plant species and hydrology. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes ~ No 0 Wetland Hydrology Present? Yes ~ No 0 Hydric Soils Present? Yes ~ No 0 Is this Sampling Point Within a Wetland? Yes l8I No 0 Remarks: Normal circumstances do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 -- - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-122-03) Date: 1/5/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Kyle L. Ince & Vanessa A. Lee State: Calfiornia Do normal circumstances exist on the site? DYes ~No Community ID: NNG Is the site significantly disturbed (Atypical Situation)? DYes ~No Transect ID: DP 7 Is the area a potential Problem Area? DYes ~No Plot ID: PP 7 (Ifneeded, explain on reverse.) ~ VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Loli umperenne Herb FAC 9. 2. . .. 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, F ACW or F AC (excluding F AC-). 100 % RemariŒ: FAC-neutral test = no hydrophytic vegetation, although normal conditions do not exist on-site due to grazing from cattle; Vegetation is predominantly ryegrass. HYDROLOGY 181 Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: 181 Aerial Photographs o Inundated o Other ~ Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) o Drainage Patterns in Wetlands Depth to free Water in Pit 1 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test o Other (Explain in Remarks) Re~ks: High water table. - - SOILS Map Unit Name (Series -and Phase): Linne Clay Loam (LsE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confirm Mapped Type? DYes 181 No Haploxerolls Profile Description: - Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 N/A 10YR 2/1 N/A N/A Clay Hydric Soil Indicators: o Histosol'. o Concretions , o Histic Epipedon o High Organic Content in surface layer in Sandy Soils 181 Sulfidic Odor o Organic Streaking in Sandy Soils 181 Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o Gleyed or Low-cbroma Colors o Other (Explain in Remarks) Re~ks: Saturated clay soil with high concentrations of decomposed organic material. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes 0 No 181 Wetland Hydrology Present? Yes 181 No 0 Hydric Soils Present? Yes 181 No 0 Is this Sampling Point Within a Wetland? Yes 0 No 181 ~m~: Non-wetland waters. Approved by HQUSACE 3/92 - .- DATA FORM ROUTINE WETLAND DETERMINATION (1987 CaE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-122-03) Date: 1/6/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Vanessa A. Lee & Diana M. Emlet State: California Do nonnal circumstances exist on the site? DYes 181 No Community ID: HW Is the site significantly distUIbed (Atypical Situation)? DYes 181 No Transect ID: DP 8 Is the area a potential Problem Area? DYes 181 No Plot ID: PP 8 (If needed, explain on reverse.) - VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. RumeX' érispus Shrub FACW 9. 2 Lolium perenne Herb FAC 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW orFAC (excluding FAC-). 100% Remarks: Herbaceous wetland. HYDROLOGY 181 Recorded Data (Descnòed in Remarks): Wetland Hydrology Indicators: o Stream. Lake, or Tide Gauge Primary Indicators: 181 Aerial Photographs o Inundated o Other ~ Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) o Drainage Patterns in Wetlands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test o Other (Explain in Remarks) Remarks: Data Point approximately 3 feet away from flowing drainage. ..- - SOILS Map Unit Name (Series and Phase): Linne Clay Loam (LsE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confinn Mapped Type? DYes 181 No Haploxerolls Profile Descritrtion: - Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. O-~2 N/A ~OYR 2/~ N/A N/A Clay Hydric Soil1ndicators: o Histosol, o Concretions I o Histic Epipedon [8 High Organic Content in surface layer in Sandy Soils o Sulfidic Odor o Organic Streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o Gleyed or Low-chroma Colors o Other (Explain in Remarks) Remarks: Organic streaking. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes ~ No 0 Wetland Hydrology Present'? Yes ~ No 0 Hydric Soils Present? Yes ~ No 0 Is this Sampling Point Within a Wetland? Yes 181 No 0 Rem~ks: Normal circumstance do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-~22-03) Date: ~/6/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Vanessa A. Lee & Diana M. Emlet State: California Do normal circumstances exist on the site? DYes ~No Community ill: HW Is the site significantly distmbed (Atypical Situation)? DYes ~No Transect ill: DP 9 Is the area a potential Problem Area? DYes ~No Plot ill: PP 9 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Lolium ~perenne Herb FAC 9. 2. Rumex prispus Herb FACW 10. 3. polypogon Herb FACW 11. mODspeliensis 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, F ACWor F AC (excluding F AC-). J. DO!¡ Rem~: Herbaceous wetland. HYDROLOGY [8] Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: [8] Aerial Photographs o Inundated o Other [8] Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water. N/A (in.) [8] Drainage Patterns in Wetlands Depth to free Water in Pit 6 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local SoH Survey Data o FAC-Neutral Test o Other (Explain in Rem~) Remarks: Saturated soils surrounded by flowing water. - - SOILS Map Unit Name (Series and Phase): Linne Clay Loam (LsE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confirm Mapped Type? DYes ~No Haploxerolls Profile Descrßrtion: - Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. O-~2 N/A lOYR 2/~ N/A N/A Clay Hydric Soillndicators: D Histosol· D Concretions D Histic Epipedon [g High Organic Content in surface layer in Sandy Soils [g Sulfidic Odor D Organic Streaking in Sandy Soils D Aquic Moisture Regime o Listed on Local Hydric Soils List rg¡ Reducing Conditions D Listed on National Hydric Soils List D Gleyed or Low-Chroma Colors D Other (Explain in Remarks) Remarks: Clay soils saturated with organic streaking. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes 181 No 0 Wetland Hydrology Present? Yes 181 No 0 Hydric Soils Present? Yes 181 No 0 Is this Sampling Point Within a Wetland? Yes 181 No 0 Remwks: Normal circumstances do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-122-03) Date: 1/6/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Vanessa A.Lee & Diana M. Emlet State: California Do normal circumstances exist on the site? DYes 181 No Community ID: NNG Is the site significantly disturbed (Atypical Situation)? DYes 181 No Transect ID: DP 10 Is the area a potential Problem Area? DYes 181 No Plot ID: PP 10 (Ifneeded, explain on reverse.) - VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Unknown grass Herb HI 9. 2. 10. 3. 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, F ACW or F AC (excluding F AC-). 0 % R~: Unknown grass is likely Bromus sp. or Avena sp. - definitely not Lolium perenne or Polypogon monspeliensis - therefore it is concluded that there is no hydrophytic vegetation present. HYDROLOGY t81 Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: t81 Aerial Photographs l8J Inundated o Other o Saturated in Upper 12 inches o No Recorded Data Available o Water Marks t8J Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: 2 (in.) o Drainage Patterns in Wetlands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves D Local Soil Survey Data D F AC-Neutral Test D Other (Explain in Remarks) Rem~: No defined drainage, but ponding due to high water table. - - son..s Map Unit Name (Series and Phase): Linne Clay Loam (LsE) Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confinn Mapped Type? DYes 181 No Haploxerolls Profile DescriDtion: -. Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-12 N/A 2.SY 2/5/1 N/A N/A Clay loam Hydric Soil Indicators: o Histosol o Concretions o Histic Epiþedon 181 High Organic Content in surface layer in Sandy Soils .181 Sulfidic Odor o Organic Streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o Gleyed or Low-Chroma Colors o Other (Explain in Remarks) Remarks: High organic content in soil with sulfidic odor. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes 0 No ~ Wetland Hydrology Present? Yes g No 0 Hydric Soils Present? Yes r8J No 0 Is this Sampling Point Within a Wetland? Yes 0 No g RemM~: Non-wetland waters; Normal circumstances do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-122-03) Date: 1/6/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator. Vanessa A. Lee & Diana M. Emlet State: California Do nonnal circumstances exist on the site? DYes ~No Community ID: MFS Is the site significantly disturbed (Atypical Situation)? DYes t8I No Transect ID: DP J.l Is the area a potential Problem Area? DYes t8I No Plot ID: PP 11 (If needed, explain on reverse.) VEGETATION Domi:rµmt Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Bacchq,ris Shrub FACW 9. salici£p).ia 2 Scirpus c~i£o.rni.c:us Shrub OBL 10. 3. Xanthium ·strumarium Herb FAC 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL,FACWorFAC (excluding FAC-). 100% Remarks: Mule Fat Schrub. HYDROLOGY 181 Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: 181 Aerial Photographs o Inundated o Other ¡:g Saturated in Upper 12 inches o No Recorded Data Available o Water Marks ¡:g Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) ¡:g Drainage Patterns in WetJands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o FAC-Neutral Test o Other (Explain in Remarks) Remarks: Saturated soils with evidence flow due to drainage patterns and drift lines. ."-.- - .-. SOILS Map Unit Name (Series and Phase): Linne Clay Loam Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confirm Mapped Type? DYes 181 No Haploxerolls Profile Descriotion: - Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (A bun dance/Contrast ) Texture, Concretions, Structure, etc. 0-J.2 N/A 2.5Y 3/2 7.5YR 5/8 1.% Loamy sand Hydric Soil Indicators: o Histosol'. o Concretions , o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o Sulfidic Odor ~ Organic Streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on Natiomù Hydric Soils List o Gleyed or Low-Cbroma Colors o Other (Explain in Remarks) Remarks: Organic streaking. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes 181 No 0 Wetland Hydrology Present? Yes 181 No 0 Hydric Soils Present? Yes 181 No 0 Is this Sampling Point Within a Wetland? Yes 181 No 0 Rem~~: Mule Fat Scrub; Normal circumstances do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-122-03) Date: 1/6/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator. Vanessa A. Lee & Diana M. Emlet State: California Do normal circumstances exist on the site? DYes ~No Community ID: TS Is the site significantly distmbed (Atypical Situation)? DYes ~No Transect ID: DP 12 Is the area a potential Problem Area? DYes ~No Plot ID: PP J.2 (Ifneeded. explain on reverse.) - VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Tamarix parviflora Tree FAC 9. 2. FoeniCzil um vulgare Shrub FACU 10. 3. Unkown Grass Herb NI 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, F ACW or F AC (excluding F AC-). 33% Remarks: Non-hydrophytic vegetation. HYDROLOGY 181 Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: 181 Aerial Photographs o Inundated o Other 181 Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) 181 Drainage Patterns in Wetlands Depth to free Water in Pit N/A (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: 0 (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test [] Other (Explain in Remarks) Remarks: Saturated soils directly abutting open water drainage. - - son..s Map Unit Name (Series and Phase): Linne Clay Loam Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confirm Mapped Type? DYes ~No Haploxerolls ~ Profile Descriution: Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-1.2 N/A 2.5Y 3/2 N/A N/A Sandy loam Hydric Soil Indicators: o Histosol . o Concretions o Histic Epii>edon o High Organic Content in surface layer in Sandy Soils o Sulfidic Odor o Organic Streaking in Sandy Soils 181 Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o GIeyed or Low-chroma Colors o Other (Explain in Remarks) Remarks: WETLAND DETERMINATION Hydrophytic Vegetarion Present? Yes 0 No 181 Wetland Hydrology Present? Yes 181 No 0 Hydric Soils Present? Yes 181 No 0 Is this Sampling Point Within a Wetland? Yes 0 No 181 Remarks: Lack of hydrophytic vegetation, although this data point is between a stand of Arroyo willows and a stand of cattails; Normal circumstance do not exist on-site due to cattle grazing. Non-wetland waters. Approved by HQUSACE 3/92 - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-122-03) Date: 1/7/99 Applicant/Owner: City of Chula Vista County: San Diego Investigator: Kyle L. Ince, Vanessa A. Lee & Diana M. State: California Emlet Do nonnal circumstances exist on the site? DYes 181 No Community ill: HW Is the site significantly disturbed (Atypical Situation)? DYes 181 No Transect ID: DP 13 Is the area a potential Problem Area? DYes 181 No Plot ill: PP 13 (If needed, explain on reverse.) - VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Polypogon Herb FACW 9. monspelien.sis 2. xant:1riumstrumarium Herb FAC 10. 3. Rumex crispus Herb FACW 11. 4. 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, F ACW or F AC (excluding F AC-). 100 % RemadŒ: Herbaceous wetland. HYDROLOGY l'8I Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream, Lake, or Tide Gauge Primary Indicators: [8J Aerial Photographs o Inundated o Other [8J Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water: N/A (in.) [8J Drainage Patterns in Wetlands Depth to free Water in Pit 1 (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: N/A (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test o Other (Explain in Remarks) Remarks: Data point along flowing drainage. ~ - son.s Map Unit Name (Series and Phase): Linne Clay Loam Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confirm Mapped Type? DYes 181 No Haploxerolls - Profile Description: Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (A bundance/Contrast) Texture, Concretions, Structure, etc. 0-1.2 N/A 7.5YR 5/2 N/A N/A Loamy sand Hydric Soil Indicators: o Histosol ' , o Concretions o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o Sulfidic Odor o Organic Streaking in Sandy Soils 181 Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o GIeyed or Low-Chroma Colors o Other (Explain in Remarks) Remarks: Saturated loamy sand along flowing drainage. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes rg No 0 Wetland Hydrology Present? Yes rg No 0 Hydric Soils Present? Yes rg No 0 Is this Sampling Point Within a Wetland? Yes rg No 0 RemariŒ: Data point along flowing drainage; Normal circumstances do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 -~---_., - - DATA FORM ROUTINE WETLAND DETERMINATION (1987 COE Wetlands Delineation Manual) Project/Site: Olympic Parkway (M&A # 97-122-03) Date: 1/7/99 Applicant/Owner. City of Chula Vista County: San Diego Investigator: Kyle L. Ince, Vanessa A. Lee & Diana M. State: California Emlet Do normal circumstances exist on the site? DYes 181 No Community ill: NNG Is the site significantly disturbed (Atypical Situation)? DYes 181 No Transect ill: DP 14 Is the area a potential Problem Area? - DYes 181 No Plot ill: PP 14 (If needed, explain on reverse.) VEGETATION Dominant Plant Species Stratum Indicator Dominant Plant Species Stratum Indicator 1. Bromus bordaceous Herb NI 9. 2. Medicago polymorpba Herb NI 10. 3. Foenicu1.um vulgare Shrub FACU 11. 4. Hirshfeldia incana Shrub NI 12. 5. 13. 6. 14. 7. 15. 8. 16. Percentage of Dominant Species that are OBL, FACW or FAC (excluding FAC-). 0% Remarks: Non-native grassland. HYDROLOGY 181 Recorded Data (Described in Remarks): Wetland Hydrology Indicators: o Stream. Lake, or Tide Gauge Primary Indicators: 181 Aerial Photographs o Inundated o Other o Saturated in Upper 12 inches o No Recorded Data Available o Water Marks o Drift Lines Field Observations: o Sediment Deposits Depth of Surface Water. (in.) o Drainage Patterns in Wetlands Depth to free Water in Pit (in.) Secondary Indicators (2 or more required): Depth of Saturated Soil: (in.) o Oxidized Root Channels in Upper 12 Inches o Water-Stained Leaves o Local Soil Survey Data o F AC-Neutral Test o Other (Explain in Remarks) Remarks: Non hydrological indicators. _._~~~~--_.. - - son.s Map Unit Name (Series and Phase): Linne Clay Loam Drainage Class: well-drained Field Observations Taxonomy (Subgroup): Calcic Entic Confmn Mapped Type? DYes ~No Haploxerolls .. Profile Descrintion: Depth Matrix Color Mottle Colors Mottle (inches) Horizon (Munsell Moist) (Munsell Moist) (Abundance/Contrast) Texture, Concretions, Structure, etc. 0-1.2 N/A 1.0YR 5/3 N/A N/A Clay loam Hydric Soilmdicators: o Histosol o Concretions o Histic Epipedon o High Organic Content in surface layer in Sandy Soils o SuJfidic Odor o Organic Streaking in Sandy Soils o Aquic Moisture Regime o Listed on Local Hydric Soils List o Reducing Conditions o Listed on National Hydric Soils List o Gleyed or Low-Chroma Colors o Other (Explain in Remarks) Remarks: No hydric soil indicators. WETLAND DETERMINATION Hydrophytic Vegetation Present? Yes 0 No ~ Wetland Hydrology Present? Yes 0 No ~ Hydric Soils Present? Yes 0 No ~ Is this Sampling Point Within a Wetland? Yes 0 No ~ RemarlŒ: Data point near data point #1.3, out of drainage and within non-native grassland; Normal circumstances do not exist on-site due to cattle grazing. Approved by HQUSACE 3/92 .~.,,__~_.."Ü -- - - APPENDIX 2 WETLAND PHOTO POINTS ~ Moiœl &: Associates. Inc. - - (}lvnJ/JlC !'arkwlll /\1([.-] ~ ,.- ., _I; - -- --~_._._-- -- I'hoto Point I. Looking oonht:ast at Data Point # I localcd ill Non-nmive Grassland. Photo Point 2.. Looking east at Data Point 112 located in herbaceous wetlands. Merkel & Assocí(l/cs. i/1c. '{'" /- \ \ ;;..... I .y -; - \ . j ¡ , i ! ¡ , Jo- ~ .~- --/'1 I I I , .. . .......... . , I .. 'tr.I"' I . , , '. .\ r- :"'II...... _.' ,.... /:t1"-~~.:' ,~'!".._'~·_..";':IIf·: -·L"-',L...w..:-r· -.t~.... "~'''''~'',J L:";:' ~ þ" ~. 1 .' .,~ ". .,: ........ .,' .. ~..":, - ;\J' . " ...., . ..". 10(;;' "~i ...~..¿.I;"'>- '~'~.'j., i~..,~,;.,..;',;:'·'· ~:.:,.:. ::;'~~~/"'~>;¿" '?' ,¡:,:~$;/" ..~ ~''r'. " ;)~~ - N - - '~';''-'7., ? .. \ t-. ~ ~~,.< 10" .,-,' . . ~':".;;; ;,~~ - '. rf¡'l~.:.e-~t:t'.": '"." ,.',.."'.,~;¡I..... .\,.'.' .~~""'., ,,'..... ,··,;·t""·· , . ... '~ . ,-':' r t \ - . " ~ ~, - / , " ,. ~':,. . . .~ ;.. 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