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Home My WebLink AboutRCC AGENDA PK 1992/05/18May 13, 1992 To: Resource Conservation Commission From: Bud Gray, lanning Department Project Manager for Kaiser Hospital Project Subject: Eastlake I Activity Center Air Quality Improvement Plan and Water Conservation Plan The attached Air Quality and Water Conservation Plans prepared by Cinti and Associates for the Kaiser Hospital project are requirements for major new projects in the City of Chula Vista. The Growth Management Program adopted by Council provides for review and recommendation by your Commission on these plans. The Air Quality Plan provides responses for air quality improvements such as providing pedestrian and bicycle paths, improving jobs/housing balance, providing access to regional transportation systems, transit access, educational programs for employees, and a transportation demand management program to reduce automobile usage. Pazk and ride facilities with shazed pazking will be included in the transit center within the Village Center. The Water Conservation Plan will achieve a 16% reduction in water usage within the Village Center as a whole. Measures include ultra ]ow flow toilets and shower heads as well as efficient outdoor irrigation systems with moisture sensors and use of reclaimed water. The project will be conditioned to comply with the City's emergency water use offset policy which is currently in preparation by the City's Environmental Resource Manager. Representatives from the City's environmental impact report team as well as the applicant's environmental consultant will be available to answer your questions at the May 18 meeting. BG:nr ~~.nirwo-.bg> EASTLAKE I ACTIVITY CENTER WATER CONSERVATION PLAN SUBMITTAL DRAFT' January 27,1992 Revised 4/16/92 Prepared for: Eastlake Development Company 900 Lane Avenue #100 Chula Vista, CA 91913 Prepared by: CINTI & ASSOCIATES 1133 Columbia Street #201 San Diego, CA 92101 (619) 239-1815 Table of Contents Paae I. INTRODUCTION/SUMMARY 1 A. Purpose B. Goals C. Conservation Estimates D. Roles and Responsibilities II. WATER CONSUMPTION 5 III. WATER CONSERVATION MEASURES 7 A. Available On-Site Conservation Measures B. Conservation Measures Implemented C. Projected Water Savings D. Off-Site Conservation Measures IV. IMPLEMENTATION/MONITORING 14 V. REFERENCES 15 Appendix A - Water Conservation Correspondence - Energy, the Environment, and the Kaiser Plan Appendix B - Kaiser Permanente Estimated Water Use i Z. INTRODUCTION/SUMMARY A. Purpose The purpose of this Water Conservation Plan for the Eastlake I Activity Center project is to respond to the Growth Management Policies of the City of Chula Vista. The water conservation measures presented in this plan are intended to respond to the long term need to conserve water in new development; more stringent short-term, emergency measures (e.g., water rationing, new meter moratorium, etc.) responding to drought or water crisis situations are not included. This plan is intended to be implemented over the life of the project and to establish standards which will be acceptable regardless of water availability. B. Goals The following are goals of the Eastlake I Activity Center Water Conservation program: 1. To conserve water during and after construction of the Activity Center project. 2. To comply with the water conservation standards and policies of the City of Chula Vista and Otay Water District. 3. To create a comprehensive framework for the design, implementation and maintenance of water conserving measures, both indoor and outdoor. 4. To be economically efficient and cost effective. C. Conservation Estimates As detailed in the report, numerous features have been included in the project and commitments made by the Master Developer to minimize the use of water during the construction and utilization of the Eastlake I Activity Center facilities. The estimated water consumption statistics, with and without conservation measures are outlined in the Table 1-1. The water savings summarized in Table 1-1 reflect the implementa- tion of several water conservation measures within the project boundary. These measures are summarized in Table 1-2. In addition, the project is committed to fully participate in any off- site mitigation program adopted by the Otay Water District and/or City. Such a program would be designed to require new development to offset all or a portion of their new water demand by funding or providing water conservation improvements in older developed areas where efficient plumbing fixtures or irrigation systems were not installed. Funds collected could also be spent on studying or acquiring new or improved sources of water (e.g., new or expanded (04/16/92) 1 water reclamation, desalination, etc.). Although such a program does not exist at the current time, considerable work is being completed by several agencies including the CWA, local water districts, and the City to formulate such a plan and adoption of a region-wide program is anticipated. Table.:,l: 1. .. ;.:.. .:.; Eastlake I Activity Center Water Consumption/Conservation Summary Water Consumption Percent w/o Conserv. w/ Conserv. Savings Medical Center 0.34 MGD* 0.30 MGD Office/Retail 0.06 MGD 0.04 MGD Employment 0.01 MGD 0.01 MGD Open Space/ Public Facility 0.04 MGD 0.03 MGD TOTALS 0.45 MGD 0.38 MGD 16% Landscape 0.10 MGD 0.00 MGD 22% *MGD=million gallons/day ~ Savings based on using reclaimed water for irrigation. D. Roles and Responsibilities In order for this plan to be effective, it is necessary to clearly assign appropriate roles and responsibilities to all of the participants in the construction and occupancy phases of the Activity Center project. There are three primary groups involved: developer/builders; government/service agencies; and future tenants/residents. Each has an important role to play, as described below. 1 Developer/Builders The community developer, the Eastlake Development Company, is providing the basic planning, design, and management of this program. Community level facilities, landscaping and con- struction standards will be implemented by the master develop- er. Individual builders/users will construct buildings/facilities according to the standards set by the master developer (and (04/16/92) 2 the City) and will be responsible for water planning and management within their own project. Builders/owners will also be the primary communicators with tenants. In this role, they will be responsible for identifying the water conserva- tion features incorporated in the project, and educating tenants regarding a continuing conservation effort. The builder/developer will also comply with any city-wide or regional water supply mitigation or improvement program, if such a program is adopted. 2 Property Owners/Residents The long term success of the conservation effort rests with property owners who are the long term water users within the project. Private landowners, associations, and public agencies will be responsible for irrigation and landscape materials on individual lots. Builders will incorporate water conserving systems and materials with initial construction but it will be the responsibility of the property owner to maintain these installations and use water responsibly on a day-to-day basis. Land uses which have significant irrigation requirements (landscaped open space) should utilize reclaimed water as it becomes available. 3 Government/Service Agencies The City of Chula Vista will review project plans and assist in the monitoring of this plan. Because of its development approval role, the City can effectively enforce water conser- vation standards for new construction. The City can also be a source of on-going education and water awareness through citizen communication programs. The City, through the Interagency Water Commission, will also have a role in formulating and implementing a city-wide or regional water conservation/mitigation program. The Otay Water District will provide domestic water service, and reclaimed water service. As the water purveyor, the District may adopt its own guidelines or standards for water conservation. The District now has a water connection allocation program in effect. The District will also monitor adherence to policies or requirements of regional water agencies such as the County Water Authority and the Regional Water Quality Control Board. (04/16/92) 3 Table 1-2 Eastlake I Activity Center Water Conservation Measures On-Site Measures Fixtures/Devices Ultra-low Flow Toilet Ultra-low Flow Shower Head Faucet Aerator Hot Water Pipe Insulation Special Hospital Equipment Outdoors/Landscaping Efficient Irrigation Systems Moisture Sensors Low Water Use Landscaping Installation of Reclaimed Water Irrigation Lines Water Conserving Practices during Grading/Construction Off-Site Measures The applicant will comply with a water use offset policy, should such a policy be adopted. Said policy may require one or more of the following: 1. Compliance with a regional water use offset program, to be administered by the San Diego County Water Authority. 2. Compliance with a locally administered water use offset program (such program may be administered by the City, water district, or a combination of both). In the event that a water offset policy is not in effect at the time building permits are issued, the requirements of this plan shall constitute the water conservation obligation of this project. ~ See Chapter 3 for flow standards for Kaiser Permanente facility. (04/16/92) 4 II. WATER CONSUMPTION This section presents information on the anticipated water demand of the Eastlake I Activity Center project. In evaluating the project, it is important to remember that the proposed project is an amendment to an existing development approval. Water consump- tion by the proposed project must be compared to that of the current approval to evaluate any water demand "impacts" associated with the project. Table 2-1 shows comparable projected water use in the Eastlake I Activity Center, based on average use rates which do not reflect significant conservation measures, and the adopted and proposed land use statistics. The projected increase in water use (without conservation measures) for the Eastlake I Activity Center project is 0.23 million gallons per day (MGD). The total water demand associated with the proposed land uses is approximately 0.45 MGD, which is approximately a 105 increase over the projected demand of the adopted land use plan. As can be seen in the table, the significant increase is due to the inclusion of the hospital use. This total amount of water is utilized for various purposes. These may vary considerably according to the uses on each site (e.g., office uses demand less water than water intensive manufacturing). The demand rates in Table 2-1 represent average rates for planning purposes. One use of water which is fairly standardized from site- to-site is landscaping irrigation. An estimate of water demand for on-site landscaping is presented in Table 2-2. The estimates are based on an average of 20% site area in landscaping and an irrigation requirement of 2.5 ft/yr, except for the Kaiser Permanente facility. A separate estimate of landscape water consumption has been provided by Kaiser (see Appendix B). The estimated 0.10 MGD landscaping demand represents a significant opportunity (22°s of total demand) to conserve potable water by using reclaimed water for irrigation. (04/16/92) 5 Table 2-1 Projected Water Use Comparison without Conservation Land Use Units Rate Use Adopted Land Uses Residential High Density 810 persons/18.0 acres 95 gpcpd .08 office/Retail 34.2 acres 2,700 gpapd .09 Open Space/Public Facility 19.6 acres 2,700 gpapd .05 Totals 71.8 acres .22 Proposed Land Uses Hospital 30.6 acres 11,000 gpapd .34 Office/Retail 23.3 acres 2,700 gpapd .06 Employment 2.0 acres 3,500 gpapd .Ol Open Space/Public Facility 15.9 acres 2,700 gpapd .04 Totals 71.8 acres .45 Increase in Water Demand 0.23 gpapd= gallons per acre per day gpcpd= gallons per capita per day MGD= million gallons per day Table 2-2 Estimated On-Site Landscape Water Demand Land Use Hospital Office/Retail Employment Open Space/Public Facility Totals Landscape Area Use N/A .07~ 4.7 acres .O1 0.4 acres <.O1 3.2 acres .O1 8.3 acres .10 ~ Consumption estimated by Kaiser Permanente. (04/16/92) 6 III. WATER CONSERVATION MEASURES Three consecutive years of drought in watersheds supplying San Diego County have lead to changing attitudes and governmental policies regarding water. Continued water shortfalls are projected as growth continues in Southern California. Three possible solutions are available: increase water supply from non-tradition- al sources; conserve available water; or, increase production and use of reclaimed water. The conservation approach is the focus of this report, primarily because it is a cost effective approach which can be directly implemented on a project-by-project basis. The potential impact of water conservation in residential uses can be see in Table 3-l. Comparable saving should be available from non-residential uses, as discussed below. Residential uses have received the majority of study and documenta- tion regarding water conservation. This is because residential uses can provide large water savings through the use of simple standardized approaches which are applicable to any type of residential unit. Water use in non-residential development can vary tremendously depending on the activities occurring on-site. This to a large degree, precludes the use of standardized conserva- tion requirements. The majority of conservation in industrial or institutional uses occurs with the development of new processes or installation of new equipment which is more water efficient. Statewide, industrial water use has been reduced to 75 percent of 1975 levels. For purposes of this study, residential statistics have been included to identify the order of magnitude of water savings which could be expected in non-residential uses. Some residential inside water use is directly comparable to uses in non-residential (e.g., toilet, faucet, etc.). Within the hospital, bath/shower, laundry, dishwashing, and cooking are comparable activities. A. Available On-Site Conservation Measures Several general approaches to water conservation are available: demand reduction; increased efficiency; increased supply/reclaimed water use; and, improved water system management. The measures included in this report are limited to those which can be imple- mented in projects of the size and type of Eastlake I Activity Center. 1. Public Information Any voluntary or mandatory water conservation effort requires cooperation of the public. Most consumers have very little knowledge of the water system that serves them. Historically, water has been inexpensive in California; therefore, people have a tendency to assume that there is an abundant supply and take it for granted. The purpose of public education is to inform and convince the consumer that a change in personal water habits is essential and is in his/her own and the (04/16/92) 7 Table 3-1 Residential Water Use in Southern California (Typical Single Family Home) Typical Use (gPcPd) Use w/ Conservation Measures (gPcPd) Potential Water Savings (gPcPd) Inside Use Toilet 30.0 20.0 10.0 33 Bath/Shower 22.0 17.0 5.0 23 Laundry 10.0 8.5 1.5 15 Dishwashing 4.0 3.0 1.0 25 Faucet 3.0 2.5 0.5 17 Cooking 3.0 3.0 0.0 0 Total Inside 72.0 54.0 18.0 25°s Outside Use Landscape 53.0 28.0 25.0 47 Car Washing, etc. 5.0 5.0 0.0 0 Total Outside 58.0 33.0 25.0 47s TOTAL USE 130.0 87.0 43.0 33% NOTE: Total savings without consideration of water reclamation. Source: Luke-Dudek Engineers community's best interest. Generally, long term results are best achieved through educating children in water conserva- tion. 2. Mechanical Measures Numerous mechanical devices to reduce water consumption are available, especially for interior use. The bathroom is where most inside water is used and wasted daily. Conventional toilets use from 5 to 7 gallons per flush, as opposed to low- flush toilets, which use from 3.3 to 1.5 gallons per flush. Since 1978, California has required that all new toilets installed use no more than 3.5 gallons per flush. (04/16/92) g Ultra low flush toilets, which have recently been developed, use about 1.5 gallons per flush. This is a reduction of about 57% from the low flush toilets used in new homes, and a reduction of up to 70o from the older toilets. This presents a significant opportunity for reduction. Another approach is the use of reclaimed water for toilet flushing. A commercial building in Irvine, CA has implemented this approach on an experimental basis. The requirement for dual piping in the building makes this a relatively expensive approach which is not yet cost-effective. This use of reclaimed water could also require modification or waiver of health department standards. Standard shower heads have a flow rate of about 4.5 gallons per minute (gpm). California requires that new shower heads have a flow of no more than 2.75 gpm. The most water conser- vative showerheads have a flow rate of 0.5 gpm using a blend of air and water to give the illusion of a higher flow rate. In addition to saving water, low flow showerheads save energy too by reducing the amount of hot water used. Corresponding- ly, low flow faucets reduce flow rates from about 5 gpm to between 2.75 gpm and 0.5 gpm. Low water-use appliances can also be large contributors to water conservation. Certain residential dishwashers use 50% less water than others and can thus save between 7 and 9 gallons per load. Clothes washers use 41 to 74 gallons per load. Water level controls and washers that recycle rinse water can save additional water. Table 3-2 shows potential water use reduction due to water saving devices installed in an average home. Equivalent savings should be available from institutional equipment in non-residential uses. Table 3-2 Summary of Typical Household Water-Saving Devices Device Water Use Reduction gpd percent Toilet improvements 7.5-17.5 Faucet aerators 0- 0.5 Shower flow limiting 0- 7.5 Pressure-reducing valves 0-16.0 Improved clothes washers 0- 8.0 Improved dishwashers 0- 8.0 Hot water pipe insulation 0- 8.0 Approximate Total 35.0 gpd From: Water Conservation Strategies, AWWA, 1980. 12-27 0- 1 0-12 0-20 0- 5 0- 4 1- 4 25% (04/16/92) 9 3. Landscape Approximately 50% of water used in California is for land- scapes. Typical landscape efficiencies are between 50$ and 800; therefor, savings of 20-50$ are possible through better watering techniques and maintenance. Trickle/drip irrigation applies water exactly where it is needed at an efficiency of 85-90%, and results in a total water savings of more than 4$ alone. Generally, sprinklers are between 60 and 75°s effi- cient. Watering at night, or in the early morning, using automatic sprinkler systems can save 200 of outside water. Daytime irrigation is inefficient because much water is lost to evaporation. Through the use of drought tolerant plants, water consumption can be reduced by 40% to 60%. Moisture sensors are another way to increase irrigation efficiencies. Residential customers, on the average, over water their landscaping by about 20% while parks and recre- ational areas are over watered by nearly 80$. Moisture sensors would limit irrigation to the quantities actually required to maintain the landscape. Polymers and wetting agents in the soil can also increase irrigation efficiency. B. Conservation Measures Implemented Implementing water conservation measures before a project is constructed provides an opportunity to include measures which might not otherwise be practical. Many of the measures described here could be prohibitively expensive to retro-fit to existing develop- ment, but can be cost effective if included with the initial construction. In addition, moving into or using a new facility provides a major opportunity to change habits and attitudes while adjusting to the new environment. 1. Fixtures/Devices - Indoors Ultra-Low Flow Toilet - The ultra low flow toilet uses 1.6 gallons per flush, compared to the current requirement of 3.5 gal/flush, or the older standard of 5 to 7 gal/flush. The Kaiser Permanente facility will utilize 3 gal/flush fixtures. Ultra-Low Flow Shower Head - The ultra-low flow shower head reduces the flow from the current standard of 3.5 to 2 gpm. Older shower heads flow from 3 to 5 gpm. The Kaiser Perma- nente facility will utilize 2.5 gpm fixtures. Faucet Aerator - Faucet aerators give the appearance and feel of greater flow, so less water is used. Although the savings is small, the additional cost is low, so their use is economi- cal. There is also potential savings in energy through reduced use of hot water. The Kaiser Permanente facility will utilize 1.5 gpm fixtures. (04/16/92) 10 Hot Water Pipe Insulation - By insulating the hot water pipes and separating the hot and cold lines to reduce heat exchange, the time the faucet is allowed to flow while waiting for the water to become hot is reduced. The cost for insulating the pipes exceeds the value of water saved, but the cost is relatively low, and it is simple to do while the unit is under construction. The potential energy savings with insulation can be significant. Water Efficient Dishwasher - New water efficient residential dishwashers can save as much as 6 gallons per cycle over older models. Equivalent saving from water efficient institutional equipment is expected. Water Efficient Clothes Washers - The relationship between water efficiency and cost of the appliance for the clothes washer is the same as with the dishwasher. Since the clothes washer uses more water, the potential savings is greater. Hospital Equipment - In addition to the devices described above, the medical center will incorporate special equipment to reduce the amount of water consumed by the facility. Automatic sink faucets and urinals are currently being tested in other Kaiser facilities. Air cooled compressors will be installed instead of water cooled equipment. Oil recirculat- ing vacuum pumps will be used instead of water-using vacuum pumps. Ion sticks will be installed in cooling towers. The ion sticks produce ozone to treat the water, eliminating the need to both chemically treat or aerate the water. Kaiser Permanente recognizes the importance of conserving water and will continue to explore new technologies which allow their facility to use water more efficiently. Additional informa- tion on these measures can be found in Appendix A. A full estimation of water consumption by the Kaiser Permanente facility is provided in Appendix B. 2. Outdoors/Landscaping Efficient Irrigation Svstem - Most landscaping is over- watered, so the potential savings with efficient, timed sprinklers and micro irrigation systems is very large. The use of moisture sensors can further reduce irrigation water consumption. Moisture sensors and efficient irrigation systems will be required of all development within the Activity Center. Low Water Use Landscaping - The largest potential for reducing outside water use is to decrease the water demand by using low-water use, drought-tolerant landscaping. Turf areas require large amounts of water, so restricting the area of turf will have a significant impact. The use of drought tolerant plant materials can result in water savings of up to 50o following the first few years during which regular irrigation is required to establish the landscape. (04/16/92) 11 3. Education General Water Conservation - In addition to the physical measures to reduce water consumption, a general water conser- vation program will enforced to reduce waste. Guidelines and educational materials will be distributed to all new property owners. Water waste may be monitored by the local owners' associations. 4. Reclaimed Water Water Reclamation - Water reclamation conserves large amounts of potable water used for irrigation. The major opportunities for irrigation with reclaimed water are the landscaped open space and on-site landscaping. Landscaped areas will be installed with piping to use reclaimed water, when it is available. A reclaimed water main is installed in Lane Avenue, approximately 1,000 feet east of the site and could deliver water to these sites when sufficient quantities are available. The use of reclaimed water alone could result in a more than 20$ reduction in potable water use in the project (see Table 2-2). 5. Water Use During Construction Water conservation measures can also be implemented during the construction/grading process. The three primary uses are: dust abatement; soil compaction; and, street washing. During the imposition of Stage 2 water conservation requirements by the Otay Water District, water conservation was incorporated in construction activities, as appropriate. Water use was limited to that necessary for proper soil compaction; soiled streets were swept instead of washed. Street washing is now prohibited. Reclaimed water will be used for grading activi- ties. A determination of the appropriate water use during construction will be made by the builder and water district at the time construction commences. C. Projected Water Savings Water savings for each of the measures identified above has not been calculated because of a lack of data for non-residential development. Kaiser Permanente has calculated that the expected water consumption of their completed hospital/medical center will be 0.30 MGD, implementing various conservation measures. This is a 12o reduction from the 0.34 MGD estimated without conservation measures. For other land uses however, a total water savings of 25 percent or approximately 0.03 MGD is a reasonable estimate of the effectiveness of the techniques. Full utilization of reclaimed water for landscape irrigation would increase water saving to approximately 35 percent. (04/16/92) 12 D. Off-Site Conservation Measures Because of the crisis created by the multi-year drought in California and the extreme short-term water rationing/use restric- tions adopted to respond to the situation, new attention is being given to formulating new policies which will conserve water and allow for long-term growth. As noted in the preceding sections, although the project implements a variety of water conserving practices, the construction and occupation of this project will result in an increased demand for water. The drought has demon- strated that water is a finite resource and that current supplies cannot reliably support current demands and continued growth. However, growth is major component of both the State's and, especially, the local San Diego area economy. In order to accommodate growth, while long term water supply options are evaluated and implemented, new programs to more efficiently use the available water are being proposed. An initial area of focus is the retro-fit of plumbing fixtures and landscape irrigation in existing development. According to statistics compiled by the Construction Industry Federation (CIF) retro-fitting the shower and toilet fixtures in approximately 2.8 older homes would save the amount of interior-use water required by one new home (additional older homes would be required to offset outdoor water use at the new home) . Thus a mitigation program which collected fees to complete such conversions, or directly required equivalent conversions, could allow a limited amount of new development to occur without creating a net increase in water demand. Comparable water savings could also be achieved by retro- fitting irrigation systems of schools, parks, golf courses, etc., where significant conservation of irrigation water could be achieved. Retro-fitting of commercial or industrial facilities has not been suggested. This type of water consumption offset program has been conceptually approved by the San Diego County Water Authority. Additional studies to determine the exact specifica- tions, scope and implementation process are now underway. Zn order to avoid conflicting regulations and to maximize fairness, such a program would need to be implemented on a wide basis, preferably county-wide. The City and local water district would provide input in the establishment of the large scale program and would probably provide local implementation. As indicated earlier, several potential water offset programs are being studied by the City and various water agencies. If an offset policy is adopted, the project will be required to comply. (04/16/92) 13 IV. IMPLEMENTATION/MONITORING Implementation of the Water Conservation Plan shall primarily be the responsibility of the Master Developer and individual site developers. The Master Developer will establish requirements and guidelines for site developers/builders and provide educational materials and guidance to new property owners. The Master Developer will also install drought tolerant landscaping, approved by the City, in streetscapes and open space areas. The Master Developer will require the inclusion of drought tolerant plant materials and efficient irrigation systems in individual site land- scaping. A substantial responsibility will also rest with the City of Chula Vista to ensure/enforce the provisions of this plan, specifically the Planning, Building, and Park and Recreation Departments. The Planning and Building Departments will review plan submittals to ensure that water conservation measures are properly included. The Parks and Recreation Department will approve planting and irriga- tion plans for public parks and open space. Irrigation piping for reclaimed water will be installed with the major landscaping improvements on each site. The provision of reclaimed water is the responsibility of the Otay Water District, which will also be responsible for enforcing water quality regulations. In order to ensure that all provisions of this plan are met, the Mitigation Monitoring Program for the Eastlake I Activity Center project, utilized to ensure the mitigation measures specified in the project EIR are implemented, will also incorporate the provisions of this Water Conservation Plan. This approach will allow for a formal determination by the City that each of the required measures are implemented. Future discretionary or administrative actions with regard to the Eastlake I Activity Center (e.g., tentative map, development agreement, building or grading permit, etc.) may be utilized to address or ensure compliance with the prescribed water conservation measures. (04/16/92) 14 V. REFERENCES Dudek & Associates; Final EIR Scripps Hospital Expansion. November 1991. ERC Environmental and Energy Services Co.; Draft Supplemental EIR Eastlake III/Olympic Training Center. August 1989. Cinti & Associates; Eastlake I SPA Plan. August 1990. Cinti & Associates; Rancho del Rev SPA II and SPA III Water Conservation Plan. July 9, 1991. Luke-Dudek Civil Engineers; Eastlake Planned Community Water Conservation Study. September 1989. Luke-Dudek Civil Engineers; Water Conservation Recommendations for Eastlake Greens. November 1989. Metropolitan Water District of Southern California; Final Draft Reaional Urban Water Management Plan. July 1990. Nordquist Associates; Draft Reclaimed Water Master Plan - Fanita Ranch. March 1991. "Water Rationing Plan Includes S.D. County"; Los Angeles Times San Diego County Edition, page A-l, December 12, 1990. Willdan Associates and Bud Gray; Draft Growth Management Program - City of Chula Vista. August 1990. (04/16/92) 15 APPENDIX A I? L ~- - ~ ~ i _. 1 {= F=' 1 1 ~, [ 4 -. E .~. - .. L .~. 4: .- L ~ .- I -. F ,,, .= r~ z. ~../ i~~//~ ItAISF.I~ PF_f~MANEN7E (''~( illl Kaiser Foundation I Hospitals December 18, 1991 Ms. Katy Wright Project Manager, Community Development Eastlake Development Company 900 Lane Avenue, Suite 100 Chula Vista, California 92103 Ro: P7ater Saving Measures I'ermanente ~~ F' _ .± Being Implemented by Kaiser Dear Katy, The following water conservation measures wfll substantially reduce the amount of water consumed by our proposed medical center in Chula Vista. 1. Installation of low-flow toilets and shower heads. 2. Automatic sink faucets and urinals. These are currently being tested at several of our facilities. 3. Installing air cooled compressors instead of water cooled Compressors. a. Installing oil recirculating vacuum pumps instead of water-using vacuum pumps. 5. Installing ion sticks in cooling towers. The ion sticks produce ozone to treat the water, which eliminates both the need to chemically treat the water, and the need to aerate the water. Aeration greatly increases water evaporation. F. Installing a moisture sensor system to regulate the landscape irrigation. 7. As you are aware, we are required to install dual water pipes. If reclaimed water is available, we will use it to irrigate our landscaping. ~s,:,:,,,-.,. D E C: - ~ 4+- ~ 1 F~ F' I Y ~ C 4F E_.~-a t L.~. 4, ~- L'- - I ._.F ~~~._-rte *. y - .. ~./ ~~ Ms. xaty Wright December 18, 1991 Page Two P ~i x We feel confident we can cut our water consumption by 30~ to 35$ by implementing these measures. Very truly s, ~ZuG~ ~' Vance F rukawa Land Use Manager