HomeMy WebLinkAboutAppendix H.3 - Davies Soil and Groundwater Sampling ReportSoil and Groundwater
Sampling Report
Davies Acquisition
4501 Otay Valley Road
Chula Vista, California
Converse Project No. 02-41-346-02
November 3, 2006
Pardee Homes
12626 High Bluff Drive, Suite 100
San Diego, California 92130
Converse Consultants
Geotechnical Engineering, Environmental & Groundwater Science, Inspection & Testing Services
November 3, 2006
Mr. Allen Kashani
Pardee Homes
12626 High Bluff Drive, Suite 100
San Diego, California 92130
Subject:
Mr. Kashani:
Soil and Water Sampling Report
Davies Acquisition
4501 Otay Valley Road
Chula Vista, California
Converse Project No. 02-41-346-02
Converse Consultants (Converse) is pleased to submit the attached Soil and
Groundwater Sampling Report which summarizes the activities and the analytical
results of soil and water samples collected at the above referenced site in general
accordance with our Work Order dated July 14, 2003.
Dist.:2/Addressee
ft Priflledon
Norman S. Eke
Managing Officer
222 East Huntington Drive, Suite 211, Monrovia, California 91016-3500
\.1=""' Telephone: (626) 930-1200 ♦ Facsimile: (626) 930-1212 ♦ e-mail: converse@converseconsultants.com
Table of Contents
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
Page
1.0 BACKGROUND ...................................................................................................... 1
2.0 SCOPE OF .SERVICES .......................................................................................... 2
2.1 Objective ............... ; ...................................................................................... 2
2.2 Sampling Protocol and Methodology ........................................................... 2
3.0 SITE SAMPLING .................................................................................................... 4
3.1 Areas of Concern (AOC) .............................................................................. 4
3.2 Field Sampling Activities, July 2003 ............................................................. 5
3.3 Field Sampling Activities, September 2003 ................................................. 9
4.0 ANALYTICAL RESULTS ........................................................................................ 13
4.1 July 2003 Sample Analytical Results ........................................................... 13
4.1. 1 AOC-1 ....................................................................................................... 13
4.1.2 AOC-2 ....................................................................................................... 15
4.1.3 AOC-3 ....................................................................................................... 16
4.1.4 AOC-4 ....................................................................................................... 17
4.2 September 2003 Sample Analytical Results ................................................ 20
4.2.1 AOC-1 ....................................................................................................... 20
4.2.2 AOC-2 ....................................................................................................... 20
4.2.3 AOC-3 ....................................................................................................... 21
4.2.4 AOC-4 ....................................................................................................... 21
5.0 LIMITATIONS AND EXCEPTIONS ........................................................................ 23
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Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
FIGURES:
FIGURE 1 Areas of Concern
FIGURE 2 Area of Concern 1
FIGURE 3 Area of Concern 2
FIGURE 4 Area of Concern 3
FIGURE 5 Area of Concern 4
TABLES:
TABLE 1 Soil Sample TPH Analytical Results
TABLE 2 Soil Sample Metals Analytical Results
TABLE 3 Soil Sample Metals STLC Analytical Results
TABLE 4 Soil Sample Metals TCLP Analytical Results
TABLE 5 Soil Sample Pesticide and Herbicide Analytical Results
TABLE 6 Soil Sample voe and SVOC Analytical Results
TABLE 7 Soil Sample Coliform Analytical Results
TABLE 8 Soil Sample PCB Analytical Results
TABLE 9 Soil Sample PAHs Analytical Results
TABLE 10 Water Sample TPH Analytical Results
TABLE 11 Water Sample Metals Analytical Results
TABLE 12 Water Sample voe and SVOC Analytical Results
TABLE 13 Water Sample Coliform Analytical Results
APPENDIX A-Boring and Trench Logs (on CD)
APPENDIX B -Laboratory Analytical Reports (on CD)
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1.0 Background
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
The subject property (herein referred to as Property) is comprised of one (1) irregular-
shaped parcel of land occupying approximately 8-acres. The Phase I ESA Report,
prepared by Converse in April 2003, identified the Property to be occupied by the
following: two (2) towing/auto salvage yards (Lora's Towing and Monroy's Towing), a
portable storage bin lot, porta potties, and portable classrooms (Lamar Portable
Toilets and Classrooms). During the Phase I ESA, Converse identified the following
recognized environmental conditions (REC's):
• Aerial photos indicated that the western portion of the Property was
agricultural as early as 1928 to at least 1983.
• In the early 1980s a San Diego Regional Water Quality Control Board
(RWQCB) Cleanup and Abatement (C&A) Order was issued to the
Property for disposal of toxic and hazardous materials on-site. The
RWQCB issued a No Further Action (NFA) letter in 1984 after soil
sampling indicated the Property was not contaminated by hazardous
materials.
• In August 1986, during a geotechnical investigation, C.H. Wood and
Associates reported the presence of burn-ash in a pit excavated on the
central portion of the Property.
• In the late 1980s, the San Diego RWQCB issued C&A Order 81-27 to
adequately characterize sandblast grit fill material with respect to potential
impacts to water resources in the area. Water samples collected in 1988
and 1989 from three monitoring wells on the northern portion of the
Property revealed low quantities of metals. The Property owner placed a
cap on the fill and constructed a ditch around it to prevent intrusion of
storm water runoff. The RWQCB considered C&A Order 8f-27 to be
satisfied in July 1990.
• During the April 2003 Phase I Property reconnaissance Converse
observed the following : 55-gallon drums leaking waste oil, an exterior
paint spray booth area, railroad ties, various auto-body and engine parts,
porta potties, leaking car batteries, and a burn ash pile on the eastern
adjacent property approximately 25-feet east of the Property's western
boundary line.
• The Phase I ESA recommended soil sampling, groundwater sampling,
and surficial water and soil "grab" sampling to further assess potential
impacts from the RECs listed above. The Phase I ESA also
recommended evaluation of Border Zone issues relative to burn ash at the
eastern adjacent property, as well as asbestos and a lead-base paint
survey on the Property.
Based on the above recommendations, Converse completed soil and groundwater
sampling activities at the site from July to September 2003 . This report summarizes
these activities and the soil and groundwater sample analytical results.
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2.0 Scope of Services
2. 1 Objective
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
The objective of this report is to present soil and groundwater sampling activities
and analytical results. Based on the uses of the site at the time of sampling, soil
and groundwater samples were analyzed for one or more of the following.
• Total Petroleum Hydrocarbons (TPH) as gasoline (g) and/or carbon chain
(cc);
• TPH modified for Ethylene Glycol;
• Volatile Organic Compounds (VOCs);
• Semi Volatile Organic Compounds (SVOCs);
• Organochlorine Pesticides;
• Polychlorinated Biphenyls (PCBs);
• Organophosphorus Pesticides;
• Chlorinated Herbicides;
• PAHs;
• pH;
• Title 22 Metals; and
• Total and Fecal Coliform, and Disinfectants (Bromate, Chlorite, Chlorine
Dioxide, Free Chlorine, Total Chlorine).
2.2 Sampling Protocol and Methodology
On July 24 and 25, 2003, twenty (20) geoprobe direct-push borings (including step-
out borings) and two (2) hand auger borings were advanced on the Property to a
maximum depth of 19-feet below ground surface (bgs). Six (6) exploratory
backhoe trenches were excavated to a maximum depth of 17-feet bgs. Soil
samples were collected at depths ranging from 0.5-feet and 19-feet bgs. Four (4)
surface soil grab samples, three (3) surface water grab samples, and two (2) river
bottom sediment samples were also collected.
On September 2 and 3, 2003, fourteen (14) Stanley rig direct-push borings
(including step-out samples) were advanced on the Property to a maximum depth
of 20-feet bgs. Seven (7) exploratory backhoe trenches were also excavated to a
maximum depth of 15-feet bgs. Soil samples were collected at depths ranging from
0.5-feet to 20-feet bgs. Four (4) surface soil grab samples were also collected.
Converse used Geoprobe and Stanley direct push drill rigs to complete soil borings
and collect soil samples from each boring. The borings were completed using a
steel rod which was hydraulically advanced into the soil to the desired sample
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November 3, 2006
depth. A closed end sampler with an acetate liner was then advanced at the end of
the rod to collect the soil sample. Upon reaching the intended sample depth, the
sampler pin was unlocked to open the sampler, which was driven an additional 2-
feet into the soil. The sampler was then raised to the ground surface and the soil
sample was retrieved.
A portion of each soil sample was removed from the liner and placed into a plastic
bag and allowed to volatilize. Each bagged sample was screened with a
photoionization detector (PIO) for voes, and then visually inspected.
Samples for voe analysis were collected using EPA Method 5035 to extract a sub-
sample from the sample in the acetate liner. The remaining sample in the liner was
capped, labeled, and placed in an ice chest for transport, under chain of custody
documentation, to Associated Laboratories.
Before each use, all drilling and sampling equipment was cleaned, double rinsed
with tap water and final rinsed with distilled water, to reduce the potential for cross-
contamination. Bore holes were backfilled with hydrated bentonite and the ground
surface was restored to match the existing grade.
Samples were collected from the excavated test pits using the backhoe. The
samples were collected by hand from the backhoe bucket in 4-ounce glass jars,
which were labeled, and placed into an ice chest for transport, under chain of
custody documentation, to Associated Laboratories. Upon completion of each
excavation, the test pits were backfilled with the excavated soil.
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3.0 Site Sampling
3.1 Areas of Concern (AOC)
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
The Property was subdivided into areas of potential environmental concern and
sampled by area. These AOCs are shown on Figure 1 and the sample locations are
shown on Figures 2 through 5. A brief description of the AOCs sampled is presented
below.
AOC-1
AOC-1 is located on the southwest and western portions of the Property and
is occupied by a commercial auto towing and storage yard (Monroy's
Towing), and the dry Otay River bed. Identified recognized environmental
concerns (RECs) included used car batteries, leaking containers of waste oil,
historical agricultural use, auto storage and repair, 55-gallon drums of
unidentified liquid, and potential impacts from dumping into the river from
upstream sources.
AOC-2
AOC-2 is located on the central portion of the Property. AOC-2 is occupied by
a commercial towing yard (Lora's Towing), two (2) associated auto storage
areas, an access bridge, and a portion of the Otay River. Identified RECs
include leaking 55-gallon drums of waste oil, the presence of burn ash, auto
storage and repair, and fill material containing sandblast grit and debris.
AOC-3
AOC-3 is located on the eastern-central portion of the Property and is
occupied by a portable toilet and portable office storage yard, and a portion of
the Otay River . Identified RECs included storage of portable toilets, potential
for buried burn ash, and fill material containing debris and sandblast grit.
AOC-4
AOC-4 is located on the eastern portion of the Property. AOC-4 is occupied
by a storage lot for storage bins. Identified RECs included railroad ties, buried
sandblast grit and debris, and potential for burn ash .
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3.2 Field Sampling Activities, July 2003
AOC-1
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
Four (4) surface grab samples (GS-1, -2, -3, -4) were .collected in the
northern portion of AOC-1 in the dry riverbed. Three (3) direct-push borings
(GP-12, -13, and -18) were advanced to a maximum depth of 10-feet below
the ground surface (bgs) in the vicinity of a paint spray area, and two (2) auto
and auto part/debris storage areas (GP-12, -18), located along the northern
portion of Monroy's Towing. During drilling, soil samples were collected at 2-
feet, 5-feet, and 10-feet below ground surface (bgs). The samples were
analyzed as indicated below:
• GS-1, -2, -3, -4: The samples were analyzed for organochlorine
pesticides, organophosphorous pesticides, chlorinated herbicides, and
Cam 17 metals. Sample GS-1 was also analyzed for total petroleum
hydrocarbons (TPH-cc) carbon chain.
• GP-12: The 2-foot sample and the 5-foot sample were analyzed for
TPH-cc, total petroleum hydrocarbons as gasoline (TPHg), volatile
organic compounds (VOCs), Cam 17 Metals, and PCBs. Due to
refusal at a depth of 6.5 feet bgs, no sample was collected from GP-12
at 10-feet.
• GP-13: The 2-foot sample and the 5-foot sample were analyzed for
Cam 17 metals and VOCs, and the 10-foot sample was archived.
• GP-18: The 2-foot sample and the 5-foot sample were analyzed for
TPHcc, TPHg, voes, Cam 17 metals, and PCBs. The 10-foot sample
was archived.
Four (4) direct-push borings (GP-9, GP-10, GP-11, and GP-17) and two (2)
hand auger borings (HA-6 and HA-7) were advanced to a maximum depth of
10-feet bgs. These borings were located in areas of historical agricultural
use, auto and auto part /debris storage areas, 5-gallon containers of waste
oil; and used car batteries. During drilling, soil samples were collected from
depths of 0.5-feet, 2-feet, 5-feet, and 10-feet bgs. The samples were
analyzed as indicated below.
• Samples GP-9 @ 0.5', GP-9 @ 2, GP-10@ 2' and GP-10 @5' were
analyzed for organochlorine pesticides, organophosphorous
pesticides, chlorinated herbicides. GP-9@ 2', GP-10@ 2' and GP-10
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@5' were also analyzed for TPHcc, TPHg, voes, and PeBs. The 10-
foot samples from Borings GP-9 and GP-10 were archived.
• Sample GP-11 @ 0.5' was analyzed for organochlorine pesticides,
organophosphorous pesticides, and chlorinated herbicides. Sample
GP-11 @ 2' was analyzed for TPHcc, TPHg, organochlorine
pesticides, organophosphorous pesticides, chlorinated herbicides,
voes, and PCBs. The 5-foot sample was analyzed for TPHcc, TPH-g,
VOCs, and PCBs. The 10-foot sample from this boring was archived.
• Sample GP-17@ 0.5' was analyzed for metals and pH. Samples from
boring GP-17 were not collected from depths of 2-feet, 5-feet, and 10-
feet were not collected due to refusal encountered in the boring.
• Samples HA-6 @ 0.5' and HA-6 @ 2' were analyzed for TPHcc,
SVOCs, and VOCs. The 5-foot and 10-foot samples we.re archived.
• Samples HA-7 @ 0.5' and HA-7 @ 2' were analyzed for Cam 17
metals and pH. The 5-foot and 10-foot samples were not collected
from this boring due to refusal encountered during drilling.
AOC-2
One (1) water grab sample (WA-1), and one (1) river bottom sediment
sample (SS-1) were collected from the Otay River on the northern portion of
this area. A total of five (5) Direct-push borings (GP-4, -5, -6, -7, -8) were
advanced to a maximum depth of approximately 16.5-feet bgs, in the vicinity
of: 55-gallon drums of waste oil, auto and auto parts/debris storage (GP-5),
historical anti-freeze storage and current auto and auto parts/debris storage
(GP-6 and GP-7), auto and auto part/debris storage, and potential buried
burn ash (GP-4, GP-8). AOC-2 is located at Lora's Towing, which includes
two (2) associated auto and auto part/debris storage yards adjacent and
contiguous to the west. The samples collected from these areas were
analyzed as indicated below.
• River water sample WA-1 and river bottom sample SS-1 was analyzed
for TPHcc, voes, SVOCs, and Cam 17 metals.
• The 2-foot, 5-foot, and 10-foot samples from boring GP-4 were
analyzed for Cam 17 metals and pH. The 15-foot sample was
archived.
• Soil samples collected from boring GP-5 at depths of approximately 2-
feet and 5-feet were analyzed for Cam 17 metals and TPHcc. The 10-
foot sample was archived .
.
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• Soil samples collected from borings GP-6 and GP-7 from depths of
approximately 2-feet and 5-feet were analyzed for TPH-c-c, ethylene
glycol, and Cam 17 metals. A sample was not collected from boring
GP-7 due to refusal. The 10 and 15-foot samples from boring GP-6
were archived.
• The 2-foot, 5-foot and 10-foot samples from boring GP-8 were
analyzed for TPHcc, TPHg, VOCs, Cam 17 metals, and PCBs. The
15-foot sample was archived
AOC-3
One (1) water grab sample (WA-3) was collected and one (1) direct-push
boring (GP-14) was advanced in the northern-central portion of AOC-3 in the
immediate vicinity of the portable toilet storage area . Samples were collected
from the ground surface (GP-14), 0.5-feet bgs and 5-feet bgs. The samples
were analyzed as indicated below.
• Groundwater sample WA-3 was analyzed for disinfectants, and total
and fecal coliform.
• The 0.5-foot and 2-foot samples collected from boring GP-14 were
analyzed for disinfectants, and total and fecal coliform. The 5-foot
sample from this boring was archived.
One (1) backhoe trench (TP-6) was excavated on the central portion of AOC-
3 so that the subsurface soils in this area could be observed for indications of
burn ash material. The trench was excavated parallel to the southern
boundary of the Property, for a distance of approximately 8 to 10-feet. TP-6
was terminated at a maximum depth of approximately 8-feet bgs when
refusal was encountered. One (1) sample was collected from TP-6 at a
depth of approximately 8-feet bgs . This sample was analyzed for Cam 17
metals and pH. No visual indicators (such as glass shards or gray ash
material) were observed in TP-6 during trenching and sampling activities.
AOC-4
One (1) water grab sample (WA-2), one (1) river bottom sediment sample
(SS-2) were collected, and five (5) direct-push borings (GP-1, -2, -3, -15, -16)
were advanced to a maximum depth of approximately 19-feet bgs . Water
sample WA-2 and sediment sample SS-3 were collected approximately 30-
feet north of the northeastern corner of the Property. Borings GP-1, -2, and -
3 were advanced along the eastern boundary of the Property in the vicinity of
burn ash located on the eastern adjacent property. GP-15 and GP-16 were
advanced in the immediate vicinity of railroad ties located at the southeastern
corner of the Property. During drilling of these borings, soil samples were
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collected at depths of approximately 0.5-feet, 2-feet, 5-feet, 10-feet, and 15-
feet bgs. These samples were analyzed as indicated below.
• Samples WA-2 and SS-2 were analyzed for TPHcc, VOCs, SVOCs,
and Cam 17 metals.
• The 2-foot, 5-foot, 10-foot, and 15-foot samples from boring GP-1
were analyzed for pH and Cam 17 metals. A sample collected from a
depth of approximately 19 feet bgs was archived.
• The 2-foot and 5-foot samples from boring GP-2 were analyzed for
Cam 17 metals and pH. The 10-foot and 15-foot samples from this
boring were archived.
• Samples were collected at 2-feet and 5-feet bgs from boring GP-3.
Samples were not collected at 10-feet and 15-feet bgs due to refusal.
The 2-foot and 5-foot samples were analyzed for Cam 17 metals and
pH.
• Soil samples were collected at 0.5-feet, 2-feet, and 5-feet bgs in boring
GP-15 and 0.5-feet, 2-feet, 5-feet and 10-feet in boring GP-16.
Samples collected at 0.5-feet and 2-feet bgs from these borings were
analyzed for VOCs, SVOCs, and Cam 17 metals. The 5 and 10-foot
samples were archived.
Five (5) exploratory backhoe trenches (TP-1, -2, -3, -4, -5), approximately 8 to
10 feet long were excavated at various locations throughout AOC-4 to
observe the subsurface soil for indications of potential for burn ash material.
All samples collected from TP-1 through TP-5 were analyzed for Cam 17
Metals and pH. The trench excavation and sampling activities are
summarized below.
• Trench TP-1 was excavated on the eastern portion of AOC-4, near the
eastern boundary of the Property, parallel to the southern boundary of
the Property. Soil samples were collected at depths of approximately
3-feet bgs and 11-feet bgs. The excavation was terminated at a depth
of approximately 12.5-feet bgs due to caving. Burn ash was observed
at a depth of approximately 3-feet bgs.
• Trench TP-2 was excavated on the central portion of AOC-4, parallel
to the southern boundary of the Property, to a maximum depth of
approximately 17-feet bgs. Soil samples were collected at depths of
approximately 4-feet, 8.5-feet and 16-feet bgs. These three samples
were analyzed for Cam 17 metals and pH. Burn ash was observed at
a depth of approximately 4-feet bgs.
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• Trench TP-3 was excavated at the northwest corner of AOC-4, parallel
to the northern boundary of the Property. Soil samples were collected
at 2-feet and 5-feet bgs. These two samples were analyzed for Cam
17 metals and pH. Trace amounts of burn ash were observed at a
depth of approximately 5-feet bgs.
• Trench TP-4 was excavated on the southwestern portion of AOC-4,
parallel to the eastern boundary of the Property, to a maximum depth
of 15-feet bgs. One (1) soil sample was collected at a depth of 2-feet
bgs and analyzed for Cam 17 metals and pH. Burn ash was not
observed in TP-4.
• Trench TP-5 was excavated on the western central portion of AOC-4,
parallel to the southern boundary of the Property, to a maximum depth
of 13-feet bgs. Soil samples were collected at 6-feet bgs and 11-feet
bgs and analyzed for Cam 17 metals and pH. Burn ash was not
observed in TP-5.
3.3 Field Sampling Activities, September 2003
Soil borings GP-19, GP-20, GP-21 and GP-22 were completed on an adjacent property
to south of the subject site concurrently with the September 2003 sampling activities at
the Davies property. The completion of these borings and the analysis of the soil
samples collected from these borings are not a part of this report and will be provided
under separate cover.
AOC-1
A total of three (3) direct-push borings (GP-26, GP-31, and -34) were
advanced on the northeastern portion of Monroy's Towing to a maximum
depth of 15-feet bgs. These step-out borings were • completed based on
elevated levels of TPH detected in GP-18 during the initial sampling in July
2003. Soil samples were collected at 2-feet, 5-feet, 10-feet, and 15-feet bgs
and were analyzed as indicated below.
• GP-26: The 5-foot and 15-foot samples were analyzed for TPHcc. The
2-foot and 10-foot samples were archived.
• GP-31: The 5-foot sample was analyzed for TPHcc. The 2-foot sample
was archived. Due to refusal encountered during drilling, the boring
was moved approximately 1-foot to the south completed to a depth of
10 feet as Boring GP-31a. One sample was collected from Boring 31a
at a depth of 10-feet and analyzed for TPHcc.
• GP-34: The 5-foot and 10-foot samples were analyzed for TPHcc, and
the 2-foot sample was archived.
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Three (3) exploratory trenches (TP-10, TP-12, and TP-16) were excavated
and observed for visual indications of burn ash and samples were collected
periodically.
• TP-10 was excavated to a maximum depth of approximately 14.5-feet
bgs on the western central portion of AOC-1, parallel to the southern
boundary of the Property. One (1) sample was collected at 15-feet
bgs, and subsequently archived. Visual indications of burn ash were
not noted in TP-10.
• TP-12 was excavated to a maximum depth of approximately 14.5-feet
bgs on the eastern central portion of AOC-1, parallel to the southern
boundary of the Property. One (1) sample was collected at 14-feet
bgs, and archived. Visual indications of burn ash were not noted inTP-
12.
• TP-16 was excavated to a maximum depth of 8-feet bgs on the
northeastern portion of AOC-1. No samples were collected from TP-
16 and no visual indications of burn ash were noted.
AOC-2
Based on the analytical results of samples collected from borings GP-4, GP-8
during the July 2003 sampling episode, seven (7) direct-push borings (GP-23,
-24, -25, -27, -28, -29, -30 and 35) were advanced on the western and
southeastern portion of AOC-2. During the completion of Borings GP-23, -24,
-25, -29 and -30, soil samples were collected at 2-feet, 5-feet, 10-feet, and
15-feet bgs. Due to refusal encountered at approximately 11-feet bgs
Borings GP-27 and GP-28 were completed to a depth of 10-feet bgs. The
analysis of the samples from these borings is summarized below.
• GP-23: The 10-foot sample was analyzed for TPHcc and PCBs. The 2-
foot and 5-foot samples were archived.
• GP-24 and GP-25: The 10-foot and 15-foot samples were analyzed
for TPHcc and PCBs. The 2-foot and 5-foot samples were archived.
• GP-27: The 5-foot and 10-foot samples were analyzed for TPHcc and
PCBs. The 2-foot sample was archived.
• GP-28: The 2-foot and 1 o.:.foot samples were analyzed for TPHcc and
PCBs. The 5-foot sample was archived.
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• GP-29: The 5-foot and 15-foot samples were analyzed for TPHcc and
PCBs. The 2-foot and 10-foot samples were archived.
• GP-30: The 2-foot, 10-foot, and 15-foot samples were analyzed for
TPHcc and PCBs. The 5-foot sample was archived.
• GP-35: The 5-foot, 10-foot, and 15-foot samples were analyzed for
TPHcc. The 2-foot sample was archived.
Two (2) exploratory trenches (TP-9, and TP-15) were excavated and the
subsurface soil was observed for visual indications of burn ash.
• TP-9 was excavated to a maximum depth of approximately 14.5-feet
bgs on the southwest portion of AOC-2, parallel to the eastern
Property boundary line. Visual indicators of burn ash were observed in
TP-9. No soil samples were collected from this trench.
• TP-15 was excavated to a maximum depth of approximately 15-feet
bgs, on the northwestern portion of AOC-2, parallel to the northern
Property boundary line. A soil sample was collected at 15-feet bgs,
and subsequently archived. Groundwater was encountered at 15-feet
bgs. No visual indicators of burn ash were observed in TP-15 .
AOC-3
Based on the analytical results of soil sample GP-14 collected during the July
, 2003 sampling episode, four (4) surface grab samples (GS-5 ,-6, -7, -8)
were collected from AOC-3 in the vicinity of the portable toilet storage area,
and from the southeastern corner of the area. These samples were analyzed
for total and fecal coliform.
One (1) exploratory trench (TP-7) was excavated and no visual indications of
burn ash were observed in the excavation.
AOC-4
Based on the analytical results of soil samples collected from GP-16 during
the July 2003 sampling episode, two (2) direct-push borings (GP-32 and GP-
33) were advanced on the southeastern corner of the AOC-4, in the
immediate vicinity of the railroad ties, to a maximum depth of 5-feet bgs. Soil
samples were collected at 0.5-feet, 2-feet, and 5-feet bgs in these borings.
The samples collected at 0.5-feet bgs were analyzed for VOCs, SVOCs, and
PAHs. The 2-foot and 5-foot samples were archived.
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• One (1) exploratory trench (TP-13) was excavated in the northeastern
corner of the property. During excavation of the trench, no visual
indicators of burn ash were observed.
See Appendix A for the boring and trench logs.
@ Converse Project No : 02-41 -346~02 12
4.0 Analytical Results
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
Selected soil and samples were analyzed in accordance with one or more of the
following Environmental Protection Agency (EPA) Methods:
• EPA 8015, TPHcc, TPH-g;
• EPA 8015 modified for Ethylene Glycol;
• EPA 8260B, voes;
• EPA 8270, SVOCs;
• EPA 8081, Organochlorine Pesticides;
• EPA 8082, PCBs;
• EPA 8141, Organophosphorus Pesticides;
• EPA 8151, Chlorinated Herbicides;
• EPA 8310, PAHs;
• pH;
• Title 22 Metals;
• EPA 9221, Total and Fecal Coliform; and
• EPA 300 and 4500CIO2, Disinfectants (Bromate, Chlorite, Chlorine Dioxide,
Free Chlorine, Total Chlorine).
The samples collected during the July 2003 sampling event were analyzed on a normal,
5-day turnaround time by Associated Laboratories (State-certified laboratory), located in
Orange, California and the samples collected during the September 2003 sampling event
were analyzed on a rush 2-day turnaround time by Associated Laboratories.
4.1 July 2003 Sample Analytical Results
The sample analytical results are summarized in the attached Tables 1
through 13 and the complete laboratory analytical report is presented in
Appendix B.
4.1.1 AOC-1
4.1.1.1 TPHcc
The analytical results indicated that the concentrations of petroleum
hydrocarbons in the C6-C10 and C1 0-C22 ranges and TPHg were not
above the detection limit used for reporting purposes in any of the
AOC-1 soil samples analyzed during the July sampling episode.
Detected concentrations of TPH C22-C36 in the shallow surface soil
(less than 2' bgs) ranged from 6.7 mg/kg in sample GP-12@ 2' bgs to
a maximum of 9,370 mg/kg in sample HA-6@ 0.5' bgs and from less
@ Converse Project No. 02-41-346°02 13
Soil and Groundwater Sampling Report
Davies Acquisition
November 3 , 2006
than the method detection limit in sample GP-11 @ 5' to a maximum
concentration of 269 mg/kg in sample GP-18@ 5'.
The analytical results of TPH concentrations detected in samples from
this area are summarized in Table 1.
4.1 .1.2 Cam 17 Metals,
The analytical results indicated that various metals were detected in
soil samples GS-1, -2, -3, -4, GP-12, -13, -17, -18, and HA-7. The
concentrations of metals in these samples were less than 10 times the
STLC, and less than the TTLC, with the exception of one sample.
• The arsenic concentration (57.9) in sample GP-13 @ 5' was
greater than 10 times the STLC but below the TTLC. This
sample was then analyzed using the waste extraction test (WET)
method. The results of this analysis indicated a concentration of
2.64 mg/L, which is below the STLC of 5 mg/L for arsenic.
The analytical results of metal concentrations detected in samples
from this area are summarized in Tables 2 and the STLC analytical
results are presented in Table 3.
4.1.1.3 pH
The pH was reported to be 8.08 in GP-18 at 2-feet bgs, 9.32 in HA-7 at
0.5-feet bgs, and 7.7 in HA-7 at 2-feet bgs.
The analytical results of the pH of soil samples are summarized in
Table 2.
4.1 .1.4 Organochlorine Pesticides, Organophosphorous Pesticides,
and Chlorinated Herbicides
The analytical results indicated that organochlorine pesticides were
detected in GS-1, -2, -3, -4; GP-9, -10 and -11. The maximum soil
concentrations of these pesticides are summarized below.
• 0.008 mg/Kg of 4,4-OOD in the surface grab sample GS-2.
• 0.094 mg/Kg of 4,4-DDE in sample GP-9 @ 0.5'.
• 0.085 mg/Kg of 4,4-DDT in sample GP-9@ 0.5'
• 0.12 mg/Kg of aldrin in sample GP-9@ 0.5'
• 0.12 mg/Kg of chlordane in sample GP-9@ 2'
@ Converse Project No: 02 -41-346-02 14
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
Organophosphorous pesticides and chlorinated herbicides were not
detected above method detection limits in GP-9, -10, -11, GS-1, -2, -3,
and -4.
The analytical results of the organochlorine pesticides,
organophosphorous pesticides, and chlorinated herbicides for the soil
samples in this area are summarized in Table 5.
4. 1. 1. s voes, svocs, and PCBs
VOCs, SVOCs, and PCBs, were not detected in any of the samples
analyzed in AOC-1.
4.1.2 AOC-2
4.1.2.1 TPHcc and Ethylene Glycol
The analytical results indicated that concentrations of petroleum
hydrocarbons in the C6-C10 range were not detected above method
detection limits in any of the samples (SS-1, WA-1, GP-4, -5, -6, -7, -8
analyzed from AOC-2 during the July sampling episode.
A maximum concentration (2,200 mg/Kg) of TPH in the C10 -C22
range was identified in sample GP-6 @2' and a maximum TPH
concentration of 10,400 mg/Kg in the C22 -C36 range was identified
in sample GP-8 @10'.
The analytical results indicated that ethylene glycol was not detected in
the analyzed samples from borings GP-6 and GP-7.
The analytical results of TPH concentrations detected in the soil
samples from this area are summarized in Tables 1 and the water
sample results are shown on Table 10 .
4.1.2.2 Cam 17 Metals
The analytical results indicated that concentrations of various metals
were detected in SS-1, WA-1, GP-4, -5, -6, -7, -8. These
concentrations in the soil samples are less than 10 times the STLC,
and less than the TTLC, with the exception of lead in sample GP-4 @
5' feet bgs. The analytical results indicated a lead concentration of
52.9 mg/kg in this sample. This lead concentration is less than the
TTLC of 1,000 mg/Kg and greater than 10 times the STLC of 5 mg/L.
Therefore, the sample was analyzed using the WET method. The
results of this analysis indicated a lead concentration 9f 0.771 mg/L,
which is below the STLC of 5 mg/L for lead.
@ Converse Project No. 02-41~346~02 ·' 15
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
Concentrations of barium (0.13 mg/I), copper (0.006 mg/I),
molybdenum (0.24mg/l) and zinc (0.015 mg/I) were identified in water
sample WA-1.
The analytical results of metal concentrations detected in soil samples
from this area are summarized in Tables 2 and the STLC analytical
results are presented in Table 3. The water sample analytical results
are presented in Table 11.
4.1.2.3 pH
The pH was reported to be 9.69 in GP-4 at 2-feet bgs, 8.30 in GP-4 at
5-feet bgs, and 8.21 in GP-4 at 10-feet bgs.
The analytical results of the pH of soil samples in this area are
summarized in Table 2.
4.1.2.4 SVOCs and VOCs
The analytical results indicated that no VOCs or SVOCs were detected
above the method detection limits in AOC-2 except for sample GP-8
@5'. A Tetrachloroethene concentration of 0.0032 was detected in
GP-8, at a depth of 5-feet bgs.
The SVOC and VOC analytical results for boring GP-8 are presented
in Table 6.
4.1.3 AOC-3
4. 1.3. 1 Cam 17 Metals
Analytical results indicated that various metals were detected in
backhoe trench sample TP-6 @ 8'. The analytical results of these
samples indicated that the metal concentrations are less than 10 times
the STLCs, and less than the TTLCs.
4.1.3.2 pH
The pH in TP-6 at 8-feet bgs was reported to be 9.26.
4.1.3.3 Total Coliform, Fecal Coliform, and Disinfectants
The analytical results indicated concentrations of that total and fecal
coliform in samples from boring GP-14 and in water surface grab
sample WA-3 as indicated below.
@ Converse Project No. 02-41~346-02· ' 16
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
• Sample GP-14 at 0.5-feet bgs: Total coliform concentration of
11,000 MPN/g and a fecal coliform concentration of 460 MPN/g.
• GP-14, at 2-feet bgs: Total coliform concentration of 350 MPN/g
and fecal coliform at a concentration of 240 MPN/g.
• WA-3, surface grab water sample: Total coliform exceeding
160,000 MPN/L and fecal coliform at a concentration of 160,000
MPN/L.
Disinfectants were not detected in any of the analyzed samples
analyzed from AOC-3.
4.1.4 AOC-4
4. 1.4. 1 TPHcc
One soil sample (SS-2) and one surface river water sample (WA-2)
collected from this area were analyzed for TPH carbon chains. No
concentrations of hydrocarbon carbon chains above the method
detection limit were identified in sample WA-2. The analytical results
of soil sample SS-2 indicated hydrocarbon chain concentrations of 2.2,
3.6, and 26 mg/kg in the C6-C10, C10-22, and C22-36 carbon chain
ranges respectively.
4.1.4.2 Cam 17 Metals, pH
The analytical results of soil samples collected in this area indicated
that concentrations of various metals were less than 10 times the
STLC, and less than the TTLC, with the exception of the following:
• Arsenic concentrations of 397 and 70.3 mg/kg were detected in
samples TP-5 @11-feet bgs and GP-1 @ 15-feet bgs
respectively. These concentrations were greater than ten (10)
times the STLC of 5 mg/L, and below the TTLC of 500 mg/kg.
Therefore, these samples were analyzed using the WET
method. The results of these analysis indicated arsenic
concentrations of 1.35 and 1.68 mg/I in samples TP-5@ 11-feet'
and GP-1 @ 15-feet respectively. Sample TP-5 @11-feet bgs
was also analyzed for Toxicity Characteristic Leaching
Procedure (TCLP). The TCLP analytical results indicated an
arsenic concentration of 0.075 mg/L which is below the Title 26
threshold of 100 mg/L.
• Concentrations of copper greater than 10 times the STLC, and
below the TTLC were detected in sample TP-1 at 3-feet bgs
@ Converse Project No. 02-41-346~02 17
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
(757 mg/kg), TP-2 at 4 (435 mg/kg), TP-3 at 5-feet (1,030
mg/kg), GP-1 at 5 and 15-feet bgs (394 mg/kg and 786 mg/kg
respectively), GP-2 at 5-feet bgs (389 mg/kg), and GP-16 at
0.5-feet bgs (789 mg/kg). Therefore, these samples were
analyzed using the WET method. The analytical results of
these analysis indicated copper concentrations below the
STLC. Sample TP-2 at 4-feet bgs was also analyzed for TCLP.
The results indicated a concentration of 0.651 mg/L which is
below the Title 26 TCLP regulatory threshold of 5 mg/L.
• The analytical results also indicated a copper concentration in
sample TP-5 at 11-feet bgs. This concentration (2,780 mg/kg)
was greater than ten (10) times the STLC, and greater than the
TTLC for copper. This sample was analyzed using the WET
method and analyzed for TCLP. The results of these additional
analyses indicated no concentrations above the method
detection limit.
• A concentration of lead (136 mg/kg) was detected in soil sample
SS-2. This concentration is greater than ten (10) times the
STLC and less than the TTLC for lead.
• Lead concentrations greater than 10 times the STLC and less
than the TTLC were detected in samples GP-1 at 15-feet bgs
(173 mg/kg), GP-2 at 5-feet bgs (163 mg/kg), TP-2 at 4-feet
bgs (320 mg/kg), TP-2 at 8.5-feet bgs (818 mg/kg), TP-5 at 11-
feet bgs (822 mg/kg), GP-1 at 5-feet bgs (61.2 mg/kg), TP-1 at
3-feet bgs (132 mg/kg}, TP-3 at 5-feet bgs (113 mg/kg) and
TP-5 at 6-feet bgs (58.9 mg/kg). These samples were
analyzed using the WET method. The results of these
analyses indicated concentrations of lead above the STLC for
lead in samples TP-2 at 4 feet bgs (13.5 mg/L), TP-2 at 8.5-
feet bgs (17.5 mg/I), TP-1 at 3-feet bgs (5.27mg/kg) and TP-3
at 5-feet bgs (8.16 mg/kg). These concentrations are above
the STLC (5 mg/kg) for lead.
Samples TP-2 at 4-feet and 8.5-feet bgs and TP-5 at 11-feet
bgs were analyzed using the TCLP. The analytical results of
TP-5 at 11 feet bgs reported a lead concentration to be below
the Title 26 threshold level for lead. Lead concentrations in
samples TP-2 at 4-feet (0.722 mg/L) and TP-2 at 8.5 feet (0.907
mg/L) were above the Title 26 threshold level for lead (0.2
mg/L).
• A concentration (2.31 mg/kg) of mercury was detected in
sample GP-2 at 5-feet bgs. This concentration is greater than
ten (10) times the STLC, and less than the TTLC for mercury.
@ Converse Project No. 02-41-346-02 18
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
The sample was analyzed using the WET method. The results
of this analysis indicated no mercury concentrations above the
method detection limit.
• Zinc concentrations greater than 10 times the STLC, and
greater than the TTLC were identified in samples GP-1 at 15-
feet bgs (3,000 mg/kg), and TP-5 at 11-feet bgs (7,310 mg/kg).
These samples along with samples TP-2 at 4-feet bgs and TP-2
at 8.5-feet bgs were analyzed using the WET method. The
results of these analyses indicated zinc concentrations less
than the STLC (250 mg/L) for zinc.
Detected concentrations of the following analytes in the following
samples were less than ten (10) times their respective STLCs, and
below their respective TTLCs. However, the samples were analyzed
using the WET and/or TCLP methods.
• TCLP analytical results indicated no concentrations of arsenic,
cadmium, chromium, copper, selenium and silver above the
method detections limit in samples TP-2 at 4-feet and TP-2 at
8.5-feet.
• TCLP analysis indicated barium concentrations of 0.208, 0.262,
and 0.775 mg/Lin samples TP-2 at 4-feet, TP-2 at 8.5-feet; and
TP-5 at 11-feet bgs, respectively.
• A nickel WET analysis of samples TP-2 at 4-feet bgs (0.331
mg/L), TP-2 at 8-feet bgs (0.437 mg/L) and TP-5 at 11-feet bgs
(0.697 mg/L) reported concentrations less than the STLC (20
mg/L) for nickel.
4.1.4.3 pH
The pH of the soil samples collected from AOC-4 was reported to be
between 7 .57 and 10.90.
4. 1.4.4 voes
The analytical results indicated concentrations of VOCs, were
detected in two samples from AOC-4.
• A toluene concentration of 5 ug/kg was reported in Sample
GP-16 at 2 feet. Sample GP-16 at 0.5-feet bgs reported ethyl
benzene, toluene, and total xylenes, with concentrations of
8,990 mg/kg; 255,000 mg/kg; and 42, 900 mg/kg, respectively.
4.1.4.5 SVOCs
@ Converse ProjectNo. 02-41:345~02 19
I
I I
I
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
The analytical results also indicated concentrations of SVOCs in
sample GP-6 at 0.5-feet bgs.
• The analytes benzo(a) anthracene, benzo(b)pyrene,
benzo(b )fluoranthene, benzo(g ,h, i)perylene,
benzo(k)fluoranthene, chrysene, dibenz(a,h)anthracene,
indeno(1,2,3-c,d)pyrene, phenanthrene, and pyrene, with
concentrations of 1,530; 2,020; 1,81 0; 1,530; 988; 1,760; 591;
2,450; 1,300; 640; and 2,400 mg/kg, respectively were reported
in the sample.
4.1.4.6 PAHs
Analytical results ·indicated concentrations of PAHs in sample GP-16 at
0.5-feet bgs.
• Anthracene, benzo(a)anthracene, benzo(b)pyrene,
benzo(b)fluoranthene, benzo(g,h,i)perylene,
benzo(k)fluoranthene, chrysene, dibenz(a,h)anthracene,
fluoranthene indeno(1,2,3-c,d)pyrene, phenanthrene, and
pyrene, with concentrations of 0.034; 1.20; 0.995; 1.59; 2.11;
0.78; 1.96; 0.131; 3.39; 1.11; 0.901 and pyrene mg/kg,
respectively were reported in this ,sample.
4.2 September 2003 Sample Analytical Results
4.2.1 AOC-1
4.2.1.1 TPHcc
The analytical results reported no concentrations of hydrocarbons in
the C6-C 10 and C 1 0-C22 carbon chain ranges above the method
detection limit in soil samples GP-26, -31, -31a and -34.
The analytical results reported concentrations of hydrocarbons in the
C22-36 carbon chain range from below the method detection limit
(sample GP-26 at 5-feet bgs) to a maximum 2,820 mg/kg in sample
GP-31 at 5-feet bgs.
4.2.2 AOC-2
4.2.2.1 TPHcc
@ Converse Project No. 02-41-346~02 20
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
The analytical results reported no concentrations of hydrocarbons in
the C6-C 10 and C 1 0-C22 carbon chain ranges above the method
detection limit in soil samples from borings GP-23, -24 @10-feet bgs, -
25, -27, -28, -29, -30, and -35. TPH concentrations in the C6-C10 and
C10-C22 carbon chain ranges of 34 mg/kg and 9.4 mg/kg respectively
were reported in sample GP-24 at 15-feet bgs .
• The analytical results indicated that concentrations of C22-C36
carbon chains ranged from less than the method detection limit
(samples GP-25 @ 1 0 and 15 feet bgs and GP-35 at 15-feet
bgs) to a maximum concentration of 4,300 mg/kg in sample GP-
29 at 15-feet bgs.
4.2.2.1 PCBs
The analytical results indicated a PCB concentration above the
detection limit for reporting purposes in one sample. A PCB 1254
concentration of 0.035 mg/kg was reported in sample GP-24 at 10-feet
bgs.
4.2.3 AOC-3
4.2.3.1 Fecal Coliform
• Analytical results of surface grab samples GS-5 through GS-8
indicated that concentrations of fecal coliform from <1 MPN/g in
samples GS-5 and GS-7 to a maximum of 350 MPN/g in
sample GS-6 .
4.2.4 AOC-4
4.2.4.1 voes and svocs
The analytical results indicated that no VOCs or SVOCs were detected
above method detection limits in any of the samples analyzed (GP-32
and GP-33 at 0.5-feet bgs) from AOC-4 during the September 2003
sampling episode.
@ Converse Project No . 02-41 -346-02
4.2.4.2 PAHs
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
The analytical results indicated concentrations of PAHs above the
method detection limit in sample GP-32 at a depth of 0.5-feet bgs.
The concentrations of benzo-(a)anthracene (0.219 mg/kg), benzo-
(a)pyrene (0.290 mg/kg), benzo-(b)fluoranthene (0.357 mg/kg), benzo-
(g,h,i)perylene (0.469 mg/kg), benzo-(k)fluoranthene (0.199 mg/kg),
chrysene (0.458 mg/kg), floranthane (0.572 mg/kg), indeno(1,2,3-
cd)pyrene (0.250 mg/kg), phenanthrene (0.100 mg/kg), and pyrene
(0.346 mg/kg) were reported in this sample.
@ Converse Project No: 02-41-346~02 22
5.0 Limitations and Exceptions
Soil and Groundwater Sampling Report
Davies Acquisition
November 3, 2006
This report has been prepared for the exclusive use of Pardee Homes in accordance
with the professional services agreement under which these services have been
provided for as it applies to the Davies Property in the City of Chula Vista, San Diego
County, California. Our services have been performed in general accordance with
applicable state and local ordinances, and generally accepted practices in the
geosciences. No other warranty, either expressed or implied, is made.
Converse Consultants is not responsible or liable for any claims or damages associated
with the accuracy and completeness of available information provided by others.
Property exploration identifies actual subsurface conditions only at those points where
samples are collected, when they are collected. Data derived through sampling and
analytical testing are extrapolated by geoscientists who then render an opinion about
overall subsurface conditions. Actual conditions in areas not sampled may differ from
predictions. This report • should not be regarded as a guarantee that no further
contamination, beyond that which was detected in our assessment, is present beneath
the Property. In the event that changes to the Property occur, or additional, relevant
information about the Property is brought to our attention, the recommendations
contained in this report may not be valid unless these changes and additional relevant
information are reviewed and the recommendations of this report are modified or
verified in writing. Reliance on this report by Third Parties shall be at the Third Party's
sole risk.
E§) Converse Project No . 02-41-346-02
APPENDIX A
B o ring and Tren c h Log s (on CD)
APPENDIX B
•
L ab oratory An a lytical Re p o rts (on C D)
FIGURE S
0 100 200
APPROXIMATE SCALE IN FEET
l
r -
I
I
I
>-I • ~ w GS-4
w I a:
11.
II)
0 co
@ I g
w
[i ~L
----
OTAY RIVER t.,S
(DRY WEST OF BRIDGE)
* MONROY'$ TOWING r STORAGE 81
f-I TP-12
TP-10
AOC1
TRAILER
ORT -
18 c::
I
I
I
ID
I JTP-9
I
AOC2
ADJACENT NAKANO PROPERTY
(AGRICULTURAL)
\
* LORA'S
TOWING
PROPERTY OTAYRIVER
\
-
GS-7
PORTA POTTIES
•
\
\
WA-3 ...
--i
TP-6
DIRT/GRAVEL LOT
;--;
TP-7
-
AOC3
·•· GS-8
CONCRETE
MONU ENTS
SS-2
WA-2
♦ ?
? ?
;;-~)t~
f:)9"~
'--~' APPROXIMATE LOCATION
OF BURN ASH ALL
ADJACENT DENNERY
RANCH PROPERTY
NDEVELOPED AND RESIDENTIAL)
LEGEND
AOC AREA OF CONCERN
GEOPROBE BORING
• HAND AUGER BORING
♦
SOIL SURFACE GRAB SAMPLE
TEST PIT
GRAB WATER SAMPLE AND
SEDIMENT SAMPLE (RIVER BOTTOM SOIL)
AREA OF CONCERN BOUNDARY
APPROXIMATE LOCATION OF BURN ASH
AREAS OF CONCERN
~ Converse Consultants
DAVIES AQUISmON
4501 OTAYVALLEY ROAD
CHULA VISTA, CALIFORNIA
Project No.
02-41-346-02
Figure No.
1
♦
GS-1 OTAY RIVER
♦
GS-2
(DRY WEST OF BRIDGE)
RIVER BANK
♦
GS-4
I •
~3P 12 * MONROY'S TOWING
I TP-10
GP 10
I GP 11+ •
I .. -• I AOC1
50 0 50 ~-Scale 1" = 50'
♦
GS-3
HE
CEMENT PAD
STORAGE BIN
TP-12 GF TIRES ,1------,-_,I
CAR
PORT
CEMENT • PAD
TRAILER O I
□ .--~
LEGEND
* AREA NOT COMPLETELY CHARACTERIZED
GEOPROBE BORING
• HAND AUGER BORING
♦
SOIL SURFACE GRAB SAMPLE
TEST PIT
GRAB WATER SAMPLE AND
SEDIMENT SAMPLE (RIVER BOTTOM SOIL)
-• -PROPERTY BOUNDARIES
--AREA OF CONCERN BOUNDARIES
-• • -APPROXIMATE LOCATION OF BURN ASH
AREA OF CONCERN 1
DAVIES AQUISITION
4501 OTAY VALLEY ROAD
CHULA VISTA, CALIFORNIA
(i Converse Consultants
Project No.
02-41-346-02
Figure No.
2
I
I
I
I
AD
HE
NTPAD
I
I
50 0
RIVER slNK
\
\ 50 I
I Scale 1 • = 50' PORTA POTTIES
I
lw
(!)
I~
C)
I
I
I
I
I
I
I (_
I
I
SS-1
WA-1
♦
T~ GI
~\ l
GP 29 1
CONCRET
MONUMEN S
.. p.?
UNIMPROVED ROAD
* LORA'S
TOWING
1f P -7
(:,p.35
GS-6
WA-3
T
DIRT/G R
1
T
I
is•!!!!!!~~~~~~~~~~~~~•:_:~~~~~j~=:r-1 ~ --· * AREA NOT COMPLETELY CHARACTERIZED
... g GEOPROBE BORING \
I
I
AOC2
• HAND AUGER BORING \
♦ SOIL SURFACE GRAB SAMPLE
TEST PIT \
A GRAB WATER SAMPLE AND T SEDIMENT SAMPLE (RIVER BOTTOM SOIL)
-• -PROPERTY BOUNDARIES
--AREA OF CONCERN BOUNDARIES
ADJACENT NAKANO PROPERTY -··-APPROXIMATELOCATIONOFBURNASH
DAVIES AQUISITION
4501 OTAYVALLEY ROAD
CHULA VISTA, CALIFORNIA
AREA OF CONCERN 2
Project No.
02-41-346-02
€i Converse Consultants
Figure No.
3
P-5
LORA'S
TOWING
GP-3!'-i
50
r ••
• •
♦
GS-7
PORTA POTTIES
\
50\
GP-14
WA-3.
f--------1
TP-6
DIRT/GRAVEL LOT
TP-7
AOC3
......__. ________ -. -. -. -. -. -. -.-. -. ~., \
Scale 1" = 50'
♦
GS-8
GS-5
GEOPROBE BORING
• HANO AUGER BORING
SOIL SURFACE GRAB SAMPLE
TEST PIT
A GRAB WATER SAMPLE ANO T SEDIMENT SAMPLE (RIVER BOTTOM SOIL)
-• -PROPERTY BOUNDARIES
--AREA OF CONCERN BOUNDARIES
-• • -APPROXIMATE LOCATION OF BURN ASH
AREA OF CONCERN 3
DAVIES AQUISITION
4501 OTAY VALLEY ROAD
CHULA VISTA, CALIFORNIA
(i Converse Consultants
Project No.
02-41-346-02
Figure No.
4
J_
TP
50
Scale 1 • = 50'
OTAY RIVER
OT
GS-8
\
\
\
GS-5
DAVIES AQUISITION
4501 OTAY VALLEY ROAD
CHULA VISTA, CALIFORNIA
\
\
{!) Converse Consultants
TP-
?
APPROXIMATE LOCATION
OF BURN ASH FILL
LEGEND
@I APPROXIMATE LOCATION OF BURNASH
GEOPROBE BORING
• HAND AUGER BORING
• SOIL SURFACE GRAB SAMPLE
TEST PIT
♦ GRAB WATER SAMPLE AND
SEDIMENT SAMPLE (RIVER BOTTOM SOIL)
R"TY BOUNDARIES
NCERN BOUNDARIES
\
-• • -APPROXIMATE LOCATION OF BURN ASH
I\ r\r"JI
AREA OF CONCERN 4
ProJecf No.
02-41-346-02
Figure No.
5
I
I t
TA B LES
Table 1
Soil Sample TPH
Analytical Results
Converse Project No. 02-41-346-02
EPA Method 8015
Boring Sample
Number Depth
(feet bgs)
GP10 2
GP10 5
GP11 2
GP11 5
GP9 2
GS2 0
GP12 2
GP12 5
GP18 2
GP18 5
HA6 0.5
HA6 2
GP26 5
GP26 10
GP31 5
GP31A 10
GP34 5
GP34 10
GP5 2
GP5 5
GP6 2
GP6 5
GP7 2
GP7 5
GP8 2
GP8 5
GP8 10
GP23 10
GP24 10
GP24 15
GP25 10
GP25 15
GP27 5
GP27 10
GP28 2
GP28 10
GP29 5
mg/Kg -Miligrams per kilogram
NA -Not analyzed
Area of Date
Concern Sampled
AOC1 7/24/2003
AOC1 7/24/2003
AOC1 7/24/2003
AOC1 7/24/2003
AOC1 7/24/2003
AOC1 7/24/2003
AOC1 7/25/2003
AOC1 7/25/2003
AOC1 7/25/2003
AOC1 7/25/2006
AOC1 7/25/2003
AOC1 7/25/2003
AOC1 9/2/2003
AOC1 9/2/2003
AOC1 9/3/2003
AOC1 9/3/2003
AOC1 9/3/2003
AOC1 9/3/2003
AOC2 7/24/2003
AOC2 7/24/2003
AOC2 7/24/2003
AOC2 7/24/2003
AOC2 7/24/2003
AOC2 7/24/2003
AOC2 7/24/2003
AOC2 7/24/2003
AOC2 7/24/2003
AOC2 9/2/2003
AOC2 9/2/2003
AOC2 9/2/2003
AOC2 9/2/2003
AOC2 9/2/2003
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 9/3/2003
ND -Not detected above the method detection limit
bgs -Below ground surface
J -An estimate concentration below the method detection limit
TPH -Total Petroleum Hydrocarbons
TPH cc (mg/Kg) TPHg
(mg/Kg)
C06-C10 C10-C22 C22-C36
ND ND 115 ND
ND 2.5J 4.7J ND
ND ND 18 ND
ND ND ND ND
ND ND 300 ND
ND ND 170 NA
ND ND 6.7 ND
ND ND 105 ND
ND ND 1210 ND
ND ND 269 ND
ND 235J 9370 NA
ND ND 48 NA
ND ND ND NA
ND ND 130 NA
ND ND 2820 NA
ND ND 200 NA
ND ND 24 NA
ND ND · 490 NA
ND ND 650 NA
ND ND 1800 NA
ND 2200 ND NA
ND ND 830J NA
ND ND ND NA
ND ND 380 NA
ND ND 90 ND
ND ND 6.0 ND
ND 540 10400 5.6
ND ND 2320 NA
ND ND 1010 NA
34 9.4 81 NA
ND ND ND NA
ND ND ND NA
ND ND 350 NA
ND ND 805 NA
ND ND 16 NA
ND ND 200 NA
ND ND 160 NA
Ethylene
Glycol
(mg/Kg)
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
ND
ND
ND
ND
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
NA
1 of 2
Table 1
Soil Sample TPH
Analytical Results
Converse Project No. 02-41-346-02
EPA Method 8015
Boring Sample
Number Depth
(feet bgs)
GP29 15
GP30 2
GP30 10
GP30 15
GP35 5
GP35 10
GP35 15
SS-1 0
SS-2 0
mg/Kg -Miligrams per kilogram
NA -Not analyzed
Area of Date
Concern Sampled
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 9/3/2003
AOC2 7/25/2006
AOC4 7/25/2003
ND -Not detected above the method detection limit
bgs -Below ground surface
J -An estimate concentration below the method detection limit
TPH -Total Petroleum Hydrocarbons
TPHcc (mg/Kg) TPHg
(mg/Kg)
C06-C10 C10-C22 C22-C36
ND ND 4300 NA
ND ND 420 NA
ND ND 202 NA
ND ND 373 NA
ND ND 230 NA
NO ND 770 NA
ND ND ND NA
ND ND 185 NA
2.2J 3.6 26 NA
Ethylene
Glycol
(mg/Kg)
NA
NA
NA
NA
NA
NA
NA
NA
NA
2 of 2
Sample Boring Area of Depth Number Concern (feet bgs)
GP12 2 AOC1
GP12 5 AOC1
GP13 2 AOC1
GP13 5 AOC1
GP17 0.5 AOC1
GP18 2 AOC1
GP18 5 AOC1
GS1 0 AOC1
GS2 0 AOC1
GS3 0 AOC1
GS4 0 AOC1
HA7 0.5 AOC1
HA7 2 AOC1
GP4 2 AOC2
GP4 5 AOC2
GP4 10 AOC2
GP5 2 AOC2
GP5 5 AOC2
GP6 2 AOC2
GP6 5 AOC2
GP7 2 AOC2
GP7 5 AOC2
GP8 2 AOC2
GP8 5 AOC2
GP8 10 AOC2
SS-1 0 AOC2
TP-6 8 AOC3
mg/Kg -Miligrams per kilogram
NA-Not analyzed
Date
Sampled
7/25/2003
7/25/2003
7/25/2003
7/25/2003
7/25/2003
7/25/2003
7/25/2006
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/25/2003
7/25/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/25/2003
7/24/2003
ND -Not detected above the method detection limit
bgs -Below ground surface
>,
C:
0
E
:;::;
C:
<(
2.65
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
2.46
24.5
1.93
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
J -An estimate concentration below the method detection limit
E E u E ·c ~ ::,
::, .E Q) ~ II) ·c: ro "C L.. Q) ro <( al al (.)
ND 61.3 0.418 ND
1.05 51.6 0.373 ND
ND 71.7 0.397 0.078
57.9 110 0.616 ND
2.57 99.5 0.557 0.251
2.01 81.0 0.277 ND
2.13 118 0.513 ND
1.06 54.9 0.280 ND
3.05 65.7 0.301 ND
3.46 77.3 0.625 0.118
3.46 54.4 0.365 ND
1.97 74.9 0.414 0.103
4.15 105 0.566 0.061
8.88 98.2 0.471 0.189
15.8 94.1 0.424 0.23
1.91 29.5 0.391 ND
4.17 213 0.431 0.154
2.26 59.5 0.329 0.191
0.969 202 0.363 0.069
3.33 138 0.438 0.204
ND 0.631 ND 12.4
1.88 89.2 0.391 0.129
1.16 82.4 0.582 0.605
ND 51.4 0.399 0.168
1.59 27.8 0.226 ND
1.65 75.5 0.338 ND
6.50 104 0.572 ND
Table 2
Soil Sample Metals
Analytical Results
Converse Project No. 02-41-346-02
CAM 17 Metals EPA Method 6010B (mg/Kg), Mercury EPA Method 7471A
E E
~ ::,
::, -L.. C: co Q) "C Q) .E 0. ro ::, Q) ~ .c 0. u "C 0 0 Q) L.. .0 u 0 ....I Q) z ... (.) u >, .s:::. :: 0 (.) ::
13.5 6.01 7.35 4.58 ND 9.29 4.61
10.5 4.87 6.14 16.5 0.17 3.44 4.30
17.0 7.46 2.29 1.20 ND 0.761 5.00
13.7 10.5 7.49 3.30 ND ND 7.33
12.1 6.71 31.8 15.70 0.33 2.62 5.79
12.0 4.04 2.81 4.30 0.29 2.16 20.30
15.0 8.44 9.89 11.5 ND ND 9.01
6.88 3.38 5.11 5.45 ND 0.827 3.35
8.59 4.63 9.27 15.4 ND ND 4.85
15.8 9.09 13.8 14.7 ND ND 9.51
9.88 4.66 9.52 8.54 ND ND 5.73
12 5.50 10.5 11.1 0.48 0.952 8.24
23.3 8.36 37.5 14.3 0.15 0.392 19.4
22 8.58 79.3 30.4 ND 23.9 10.4
17.8 10.8 151 52.9 0.31 30.5 7.21
11.2 6.68 7.28 3.61 ND 2.91 3.82
17.0 4.81 40.0 33.8 ND 0.936 4.95
12.8 5.11 21.5 23.3 ND ND 6.58
14.5 4.39 8.12 18.6 ND ND 6.00
20.8 9.04 160 36.5 ND 2.38 9.39
6.18 6.18 4.32 1.62 ND ND 5.64
13.3 4.82 361 19.5 ND 1.12 6.34
25 6.99 13.7 21.7 ND ND 7.20
13.6 7.02 50.9 17.1 ND 6.69 6.62
14.8 3.81 61.9 8.82 0.21 9.13 2.10
15.8 4.30 68.2 11.4 ND ND 4.54
7.46 3.49 5.29 5.99 ND 12.6 4.55
EPA
Method
9045 E E E ::, L.. ::, ·c Q) ~ '5 u
2 C: Q) co ro ci5 N Q) .s:::. C: ro pH Cl) I->
ND ND ND 43.3 31.1 NA
ND ND ND 24.9 29.4 NA
ND ND ND 72.9 41.3 NA
ND ND ND 46.4 32.0 NA
ND ND ND 43.6 56.0 8.08
ND ND ND 52.7 25.2 NA
ND ND ND 47.8 43.5 NA
ND ND ND 24.6 50.8 NA
ND ND ND 28.0 47.2 NA
ND ND ND 40.7 66.4 NA
ND ND ND 30.5 48.4 NA
ND ND ND 32.0 48.3 9.32
ND ND ND 54.9 65.2 7.7
ND ND ND 38.5 177 9.69
ND ND ND 38.9 338 8.30
ND ND ND 30.3 19.7 8.21
ND ND ND 63.4 60.4 NA
ND ND ND 33.6 74.0 NA
ND ND ND 35.9 57.4 NA
ND 0.118 ND 34.5 186 NA
ND ND ND 39.5 39.9 NA
0.705 ND ND 33.7 83.7 NA
ND 0.213 ND 35.3 83 NA
0.903 ND ND 42.5 71.8 NA
ND ND ND 20.6 69.1 NA
ND ND ND 33.3 205 NA
ND ND ND 21.5 38.1 9.26
1 of 2
Sample Boring Area of Date Depth Number Concern Sampled (feet bgs)
GP1 2 AOC4 7/24/2003
GP1 5 AOC4 7/24/2003
GP1 10 AOC4 7/24/2003
GP1 15 AOC4 7/24/2003
GP15 0.5 AOC4 7/25/2006
GP15 2 AOC4 7/25/2006
GP16 0.5 AOC4 7/25/2003
GP16 2 AOC4 7/25/2003
GP2 2 AOC4 7/24/2003
GP2 5 AOC4 7/24/2003
GP3 2 AOC4 7/24/2003
GP3 5 AOC4 7/24/2003
SS-2 0 AOC4 7/25/2003
TP-1 3 AOC4 7/24/2003
TP-1 11 AOC4 7/24/2003
TP-2 4 AOC4 7/24/2003
TP-2 8.5 AOC4 7/24/2003
TP-2 16 • Ine 7/24/2003
TP-3 2 AOC4 7/24/2003
TP-3 5 AOC4 7/24/2003
TP-4 2 AOC4 7/24/2003
TP-5 6 AOC4 7/24/2003
TP-5 11 AOC4 7/24/2003
Total Threshhold Limit Concentration (TTLC;
mg/kg)
Soluable Th reshold Limit Concentration (STLC;
mg/L)
mg/Kg -Mil igrams per kilogram
NA -Not analyzed
ND -Not detected above the method detection limit
bgs -Below ground surface
>,
C:
0
E ;;:::;
C: <{
ND
4.02
ND
16.4
ND
ND
ND
ND
ND
ND
ND
ND
2.73
5.27
ND
7.98
11.2
ND
ND
ND
ND
2.65
138
500
15
J -An estimate concentration below the method detection limit
E E 0 E ·2 ~ ::,
::, .E Q) ·c: ~ (/) co "O .... Q) co <{ co co (.)
1.63 227 0.650 ND
21.2 195 0.493 0.347
3.21 75.7 0.257 ND
70.3 333 0.600 1.44
ND 33.3 0.367 ND
9.97 140 0.218 0.286
6.45 219 0.698 0.182
ND 54.8 0.385 ND
3.90 94.9 0.590 0.097
6.69 171 0.453 1.42
2.99 80.9 0.389 0.139
7.01 97.0 0.352 0.115
3.02 76.4 0.379 2.79
24.9 290 0.682 2.95
1.81 94.5 0.672 ND
6.26 142 0.386 1.24
3.17 96.3 0.243 1.39
1.44 23 .6 0.185 ND
ND 77.4 0.563 0.101
7.37 336 0.798 0.853
ND 45.9 0.417 0.096
15.4 87 .2 0.537 0.216
397 694 0.944 3.89
500 10,000 75 100
5 100 0.75 1
Table 2
Soil Sample Metals
Analytical Results
Converse Project No. 02-41-346-02
CAM 17 Metals EPA Method 6010B (mg/Kg), Mercury EPA Method 7471A
E E
~ ::, ::, -...
C: ro Q) "C Q) .E ::, Q) Q. co (.) ~ .0 Q. Q) .... "O 0 0 0 0 ..J Q) .0 z .... (.) (.) >, .c ::E (.) 0
~
13.4 6.90 32.2 18.2 ND 6.29 6.29
22.0 18.9 394 61.2 ND 94.2 14.3
9.64 4.11 20.1 14 .5 ND ND 3.40
48.0 48.9 786 173 ND 394 11.4
14.0 5.21 2.66 ND ND ND 4.35
31.8 9.26 223 19.50 ND 24 · 21.90
32.4 18.4 789 44.30 ND 5.77 14.10
18.8 6.67 8.69 ND ND 7.04 9.09
14.5 6.67 21.0 11 .2 ND 4.22 6.94
43.3 14.4 389 163 2.31 26.4 25.9
19.4 8.38 72.7 20.2 ND 11.2 10.2
17.7 8.87 90.2 25.9 ND 25.8 11.9
20.2 4.55 121 136 0.39 6.03 22.7
83.6 31.6 757 132 0.20 73.9 46.9
11.9 6.00 3.62 2.68 ND 1.55 4.80
31.5 12.6 435 320 0.62 5.14 15.1
29.6 5.99 194 818 0.39 7.66 10.4
2 1.33 0.943 1.93 ND 2.19 0.683
15.8 8.55 15.2 7.27 ND 0.591 6.57
52.1 24.2 1030 113 0.64 1.64 24.1
15.8 6.80 28.5 8.61 0.22 1.46 7.86
18.0 12.6 143 58.9 0.30 32.4 7.97
78.2 165 2780 822 0.55 782 33.0
2,500 8,000 2,500 1,000 20 3,500 2,000
560 80 25 5 0.2 350 20
EPA
Method
9045 E E E ::, ... ::,
Q) .:2 0 ·2 '6 ~ 'iii C: Q) en co N Q) .c C: co pH en I->
ND ND ND 46.8 133 7.57
2.96 0.319 ND 30 1010 8.91
ND ND ND 28.9 31.4 8.85
5.7 1.29 ND 38.6 3000 8.82
ND ND ND 49.7 29.8 NA
ND ND ND 124 280.0 NA
ND 0.312 ND 28.7 533.0 NA
ND 0.719 ND 37.5 24.5 NA
ND ND ND 42.5 87.9 7.89
0.953 7.22 ND 36.5 630 10.90
ND ND ND 34.9 204 9.58
ND 0.272 ND 23.7 320 8.88
ND 1.21 ND 23.8 361 NA
5.75 0.811 ND 54.1 1110 8.41
ND ND ND 47.3 30.3 8.58
ND 3.16 ND 30.1 559 8.87
0.727 2.11 ND 18.4 553 7.98
ND ND ND 12.3 9.93 9.03
ND ND ND 56.2 44.5 8.15
0.865 1.06 ND 77.5 1350 8.17
ND ND ND 56.8 66.3 8.37
ND ND ND 34.8 373 9.35
12.7 4.88 ND 68.9 7310 8.99
100 500 700 2,400 5,000 --
1 5 7 24 250 --
2 of2
Sample Boring Area of Depth Number Concem (feet bgs)
GP-13 5 AOC1
GP-4 5 AOC2
GP1 5 AOC4
GP1 15 AOC4
GP2 5 AOC4
GP16 0.5 AOC4
SS-2 0 AOC4
TP-1 3 AOC4
TP-2 4 AOC4
TP-2 8.5 AOC4
TP-3 5 AOC4
TP-5 6 AOC4
TP-5 11 AOC4
STLC (mg/L)
mg/L -Milligrams per Liter
NA -Not analyzed
Date
Sampled
7/25/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/25/2003
7/25/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/24/2003
ND -Not detected above the method detection limit
bgs -Below ground surface
>,
C: (,.)
'i: 0
E Q)
~ ~ <( <(
NA 2.64
NA NA
NA NA
NA 1.68
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA NA
NA 1.35
15 5
J -An estimated concentration below the method detection limit
STLC -Soluble Threshold Limit Concentration
Table 3
Soil Sample Metals STLC Analytical Results
Converse Project No. 02-41-346-02
Metals EPA Method 6010 STLC, Mercury Extract EPA Method 245.1 (mg/L)
E E E
E ... ~ :::, E E :::, .., C: :::, :::, tii Q) 'O ] :::, :::, ·e ·e a. :::, Q) 'i: ~ .c a. ct! ~ 'O ·.:::: e 0 Q) .c (,.) Q) ro 'O (.) 0 ...J Q) >, z ai CD Q) ct! ..c: (.) ::E CD (.) (.) 0 en ::E
NA NA NA NA NA NA NA NA NA NA NA
NA NA NA NA NA NA 0.77 NA NA NA NA
NA NA NA NA NA 3.13 2.32 NA NA NA NA
NA NA NA NA NA 2.81 0.562 NA NA NA NA
NA NA NA NA NA 8.64 3.99 ND NA NA NA
NA NA NA NA NA 20 .8 NA NA NA NA NA
NA NA NA NA NA NA 5.38 NA NA NA NA
NA NA NA NA NA 2.57 5.27 NA NA NA NA
NA NA 0.101 0.330 NA 12.1 13.5 NA NA 0.331 NA
NA NA ND 0.439 NA NA 17.5 NA NA 0.437 NA
NA NA NA NA NA 2.94 8.16 NA NA NA NA
NA NA NA NA NA NA 0.802 NA NA NA NA
NA NA ND 0.184 NA ND 1.36 NA NA 0.697 NA
100 0.75 1 560 80 25 5 0.2 350 20 1
E E ... :::,
~ :::, i5 (,.)
C: tii ct! N ci5 C: ..c: ~ f-
NA NA NA NA
NA NA NA NA
NA NA NA NA
NA NA NA 39.8
NA NA NA NA
NA NA NA NA
NA NA NA NA
NA NA NA NA
NA NA NA 28.8
NA NA NA 29.6
NA NA NA NA
NA NA NA NA
NA NA NA 90.2
5 7 24 250
1 of 1
Sample Boring Area of Depth Number Concern (feet bgs)
TP-2 4 AOC4
TP-2 8.5 AOC4
TP-5 11 AOC4
TCLP (mg/L)
mg/L -Milligrams per Liter
NA -Not analyzed
Date
Sampled
7/24/2003
7/24/2003
7/24/2003
ND -Not detected above the method detection limit
bgs -Below ground surface
>,
CJ C
0 ·c
E Q)
Cl) :;:::; ,._
C <.( <.(
NA ND
NA ND
NA 0.075
5 100
J -An estimated concentration below the method detection limit
TCLP -Toxicity Characteristic Leaching Procedure
Table 4
Soil Sample Metals TCLP Analytical Results
Converse Project No. 02-41-346-02
Metals EPA Method 6010 TCLP (mg/L)
E E
E E ,._ ~ ::::,
E ::::, ::::, ::::, -Q) C Q) .E cii "O ::::, Q) ::::, .E .c a. co CJ "O ..:.:: ·c ~ 0 0 a. Q) ,._ .c CJ co "O ,._ (.) 0 ...I Q) >, z co Q) co .c (.) :a: co (.) (.) 0
~
0.208 NA ND ND NA 0.651 0.722 NA NA NA
0.262 NA ND ND NA ND 0.907 NA NA NA
0.775 NA ND ND NA ND 0.08 NA NA n
NA 1 5 NA NA 5 0.2 NA NA 1
E E E ::::, ,._ ::::,
Q) ::::, CJ ·c > 'o C
Q) cii co N Q) u5 C .c ctJ Cl) I->
ND ND NA NA NA
ND ND NA NA NA
ND ND NA NA NA
5 NA NA NA NA
1 of 1
Table 5
Soil Sample Pesticide and Herbicide Analytical Results
Converse Project No. 02-41-346-02
Organophosphorus
Organochlorine Pesticides EPA Test Method 8081 (mg/kg)
Boring Sample Area of Date Depth (feet Number bgs) Concern Sampled
GS4 0 AOC1 7/24/2003
GS3 0 AOC1 7/24/2003
GS2 0 AOC1 7/24/2003
GS1 0 AOC1 7/24/2003
GP9 0.5 AOC1 7/24/2003
GP9 2 AOC1 7/24/2003
GP11 0.5 AOC1 7/24/2003
GP11 2 AOC1 7/24/2003
GP10 2 AOC1 7/24/2003
GP10 5 AOC1 7/24/2003
mg/Kg -Milligrams per kilogram
ND -Not detected above the method detection limit
bgs -Below ground surface
J -An estimated concentration below the method detection limit
Cl
Cl
Cl
I
""'" -.i
ND
ND
0.008
ND
ND
ND
ND
ND
ND
ND
Q) w I-C Cl Cl C co All other Cl Cl ·c -e I ..;. "C 0 analytes s:t" <( :2 -.i -.i t)
0.005 0.006 ND 0.026 ND
0.010 0.009 ND 0.059 ND
0.030 0.010 ND 0.091 ND
0.007 ND ND ND ND
0.094 0.085 0.12 ND ND
0.011 0.020 ND 0.12 ND
0.013 O.Q18 ND ND ND
0.005 ND ND ND ND
0.029 0.012 ND 0.091 ND
0.084 0.012 ND 1 ND
Pesticides EPA
Method 8141
(mg/kg)
All Analytes
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
Chlorinated
Herbicides EPA
Method 8151
(mg/kg)
All Analytes
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
1 of 1
Sample Boring Area of Depth Number Concern (feet bgs)
GP10 2 AOC1
GP10 5 AOC1
GP11 2 AOC1
GP11 5 AOC1
GP12 2 AOC1
GP12 5 AOC1
GP13 2 AOC1
GP13 5 AOC1
GP18 2 AOC1
GP18 5 AOC1
GP9 2 AOC1
HA6 0.5 AOC1
HA6 2 AOC1
GP8 2 AOC2
GP8 5 AOC2
GP8 10 AOC2
SS-1 0 AOC2
GP15 0.5 AOC4
GP15 2 AOC4
GP16 0.5 AOC4
GP16 2 AOC4
GP32 0.5 AOC4
GP33 0.5 AOC4
SS-2 0 AOC4
ug/Kg -Micrograms per kilogram
NA -Not analyzed
Date
Sampled
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/25/2003
7/25/2003
7/25/2003
7/25/2003
7/25/2003
7/25/2003
7/24/2003
7/25/2003
7/25/2003
7/24/2003
7/24/2003
7/24/2003
7/25/2006
7/25/2003
7/25/2003
7/25/2003
7/25/2003
9/3/2003
9/3/2003
7/25/2006
ND -Not detected above the method detection limit
bgs -Below ground surface
a,
C: a,
i e
0 :c
0
I!!
al I-
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
3.2J
ND
ND
ND
ND
ND
ND
ND
ND
ND
J -An estimated concentration below the method detection limit
II)
C:
Q)
N
C:
Q)
IO
>,
:6 w
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
ND
NO
ND
ND
ND
ND
ND
ND
8,990
ND
ND
ND
ND
Table 6
Soil Sample VOCs, SVOCs, Analytical Results
Converse Project No. 02-41-346-02
voes EPA 8260
(µg/Kg)
a, a, a,
C: C: C:
Q) Q) Q) Q)
~ 0 C: ..c: ~ Jg l!! ~ 'E II) I!! Q)
C: g :6 >, a. All Other a. Q) C: ro 0 ~
::, Q) ta ::, .c Analytes ~ C: ro 2 ~ Q) .c 0)
>, 0 C: 2 0 X N Ql N C: IO C: C: Ql Ql Ql IO IO IO
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND NO NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND ND ND ND ND
ND ND ND ND ND ND ND
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND NA NA NA NA
ND ND ND ND ND ND ND
ND ND ND ND ND ND ND
ND ND ND ND ND ND ND
255,000 42,900 ND 1,530 2,020 1,810 1,530
5.0 ND ND ND ND ND ND
ND ND ND ND ND ND ND
ND NO ND ND ND ND ND
ND ND ND ND ND ND ND
SVOCs EPA 8270
(µg/Kg)
a, a,
C: C: Q) Q) 0 ..c: ~ a,
~(l)
II)
'E C: C: a, :6 a, N C: ~ l!! C: C: :6 • Q) a,
Q) :6 C: All Other 0 Ul ,!!!_ C:
~ ... ~ ::, ~» C: ~ l!! 0 a. ~ ..c: C: ~ ta >, Analytes ..,. ..c: ¾ 0 Q) "O C: 11.
0 (.) ::, ~o Ql ..c:
N C: iI 11. C: Ql
Ql .c
IO 0
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
ND ND ND ND ND ND ND ND
ND ND ND ND ND ND ND ND
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
NA NA NA NA NA NA NA NA
ND ND ND ND ND ND ND ND
ND ND ND ND ND ND ND ND
ND ND ND ND ND ND ND ND
988 1,760 591 2,450 1,300 640 2,440 ND
ND ND ND ND ND ND ND ND
ND ND ND ND ND ND ND ND
ND ND ND ND ND ND ND ND
ND ND ND ND ND ND ND ND
1 of 1
Table 7
Soil Sample Coliform
Analytical Results
Converse Project No. 02-41-346-02
9221 Coliform by Multiple Tube
Boring Sample Depth Area of Sample Date Number (feet bgs) Concern
GP14 0.5
GP14 2
GS5 0
GS6 0
GS? 0
GS8 0
mg/Kg -Milligrams per kilogram
NA -Not analyzed
AOC3
AOC3
AOC3
AOC3
AOC3
AOC3
ND -Not detected above the method detection limit
bgs -Below ground surface
7/25/2003
7/25/2003
9/3/2003
9/3/2003
9/3/2003
9/3/2003
J -An estimated concentration below the method detection limit
MPN/g -Most probable number per gram
Fermentation
Total Coliform Fecal Coliform
(MPN/g) (MPN/g)
11,000 460
350 240
NA <1
NA 350
NA <2
NA <2
Cationic
Surfactants
(mg/kg)
ND
ND
NA
NA
NA
NA
1 of 1
Table 8
Soil Sample PCB
Analytical Results
Converse Project No. 02-41-346-02
Boring Sample Depth Area of PCBs EPA Method 8082 (mg/Kg)
Number (feet bgs) Concern
GP10 2 AOC1
GP10 5 AOC1
GP11 2 AOC1
GP11 5 AOC1
GP12 2 AOC1
GP12 5 AOC1
GP18 2 AOC1
GP18 5 AOC1
GP9 2 AOC1
GP23 10 AOC2
GP24 10 AOC2
GP24 15 AOC2
GP25 10 AOC2
GP25 15 AOC2
GP27 5 AOC2
GP27 10 AOC2
GP28 2 AOC2
GP28 10 AOC2
GP29 5 AOC2
GP29 15 AOC2
GP30 2 AOC2
GP30 10 AOC2
GP30 15 AOC2
GP8 2 AOC2
GP8 5 AOC2
GP8 10 AOC2
mg/Kg -Milligrams per kilogram
ND -Not detected above the method detection limit
bgs -Below ground surface
Sample Date
7/24/2003
7/24/2003
7/24/2003
7/24/2003
7/25/2003
7/25/2003
7/25/2003
7/25/2006
7/24/2003
9/2/2003
9/2/2003
9/2/2003
9/2/2003
9/2/2003
9/3/2003
9/3/2003
9/3/2003
9/3/2003
9/3/2003
9/3/2003
9/3/2003
9/3/2003
9/3/2003
7/24/2003
7/24/2003
7/24/2003
J -An estimated concentration below the method detection limit
1254 1260 All Other Analytes
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
0.035 ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND 0.014J ND
ND ND ND
ND 0.023J ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
ND ND ND
1 of 1
Sample Boring Area of Date Depth Number Sampled Concern (feet bgs)
GP16 0.5 AOC4 7/25/2003
GP32 0.5 AOC4 9/3/2003
GP33 0.5 AOC4 9/3/2003
mg/Kg -Milligrams per kilogram
ND -Not detected above the method detection limit
bgs -Below ground surface
(I)
C
Q) u e ..c c <x:
0.034J
ND
ND
J -An estimated concentration below the method detection limit
Table 9
Soil Sample PAHs
Analyticla Results
Converse Project No. 02-41-346-02
PAHs EPA 8310
(mg/Kg)
Q)
(I) Q) (I) Q) C
C C C C Ql
(I) (I) (I) Q) Ql u u C ..c ~ ..c e ~ --e C Q) C Q) £ ..c >, e 0. e C -0. 0 0 Ql C
C rn ,....._ "' Jt :, :, (1) !E. ..c 5:.. ~ ..c rn 0 .0 0) .::,: ..c ti 0 N 0 0 -CJ -C 0 N N (I) N N N C C Ill C C C Ql (I) (I) Ql Ql .0 Ill Ill Ill (0 i:5
1.2 0.995 1.59 2.11 0.78 1.96 0 .131J
0.219 0.290 0.357 0.469 0.199 0.458 ND
ND ND ND ND ND ND ND
Q)
C
~
>, (I) 0. (I)
C C ~ (I) (I) ... (I) ..c c5 -..c C All other I -~ C C'? C e C'i (1) >, Analytes
0 . C a. :, .... Q)
u::: 0 ..c a. C
(I)
"'O
.E
3.39 1.11 0.901 1.83 ND
0.572 0 .250 0.100 0.346 ND
ND ND ND ND ND
1 of 1
Table 10
Water Sample TPH
Analytical Results
Converse Project No. 02-41-346-02
EPA Method 8015
Boring
Sample
Number Depth
{feet bgs)
WA-1 0
WA-2 0
mg/L -Milligrams per liter
NA -Not analyzed
Area of Date
Concern Sampled
AOC2 7/25/2006
AOC4 7/25/2003
ND -Not detected above the method detection limit
bgs -Below ground surface
J -An estimated concentration below the method detection limit
TPH cc (mg/L)
TPHg (mg/L)
C06-C10 C10-C22 C22-C36
ND 1.1J 0.7J NA
ND ND ND NA
Ethylene
Glycol (mg/L)
NA
NA
1 of 1
Sample Boring Depth Number (feet bgs)
WA-1 0
WA-2 0
mg/L -Milligrams per liter
NA -Not analyzed
Area of Date
Concern Sampled
AOC2 7/25/2003
AOC4 7/25/2003
ND -Not detected above the method detection limit
bgs -Below ground surface
>,
C
0
E :;::::;
C:
<(
ND
ND
J -An estimated concentration below the method detection limit
u ·c:
Q)
1/) ....
<(
ND
ND
Table 11
Water Sample Metals
Analytical Results
Converse Project No. 02-41-346-02
CAM 17 Metals EPA Method 6010 (mg/L)
E E
E E .... ~ ::,
E ::::I ::, -Q) C: Q) ::, .E ci'i "'C ::, Q) ::, .E a. ctl .le: ·;:: ~ ..c a. Q) ~ "'C u ca "'C 0 0 0 ..J Q) ..c z .... () >, al Q) ca .c () ~ al () () 0
~
0.130 ND ND ND ND 0.006 ND ND 0.24 ND
0.179 ND ND ND ND 0.004 ND ND 0.08 ND
EPA
Method
E 9045 E E .... ::::I ::, Q) .2 u ·c: 'a ~ ci'i ca C:
Q) u; C: N a; ..c: ca pH rn I->
ND ND ND ND 0.015 NA
ND ND ND ND 0.013 NA
1 of 1
Table 12
Water Sample SVOCs, voes, Analytical Results
Converse Project No. 02-41-346-02
Boring Sample Area of Date
Number Depth Concern Sampled (feet bgs)
WA-1 0 AOC2 7/25/2003
WA-2 0 AOC4 7/25/2003
ug/L -Milligrams per liter
ND -Not detected above the method detection limit
bgs -Below ground surface
voes EPA 8260
(µg/L)
All Analytes
ND
ND
J -An estimated concentration below the method detection limit
SVOCs EPA 8270
(µg/L)
All Analytes
ND
ND
-
1 of 1
Table 13
Water Sample Coliform Analytical Results
Converse Project No. 02-41-346-02
Boring Sample Depth Area of Sample Date Number (feet bgs) Concern
WA-3 0 AOC3
mg/L -Milligrams per Liter
ND -Not detected above the method detection limit
bgs -Below ground surface
7/25/2006
J -An estimated concentration below the method detection lim it
MPN/L -Most probable number per Liter
9221 Coliform by Multiple Tube
Fermentation
Total Coliform Fecal Coliform
(MPN/L) (MPN/L)
>160000 160000
Cationic
Surfactants
(mg/L)
ND
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