HomeMy WebLinkAboutCT 98-17; Hadley Property; Tentative Map (CT) (56)c
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AGRICULTURAL CHEMICAL RESIDUE SURVEY
f HADLEY PROPERTY, APN 21 5-080-1 9
m CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA 92009
[ FOR
• RYLAND HOMES
t 15373 INNOVATION DRIVE, SUITE 300
SAN DIEGO, CALIFORNIA 921 28
E W.O.E2758-SC OCTOBER 8, 1999
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RECEIVED
*APR 132000
•f CITY OF CARLSBAD
* PLANNING DEPT.
C
Geotechnical • Geologic • Environmental
5741 Palmer Way • Carlsbad, California 92008 • (760)438-3155 • FAX (760) 931-0915
Octobers, 1999
W.O.E2758-SC
Ryland Homes
15373 Innovation Drive, Suite 300
San Diego, California 92128
Attention: Mr. Jim McMenamin
Subject: Agricultural Chemical Residue Survey, Hadley Property, APN 215-080-19,
City of Carlsbad, San Diego County, California 92009
• INTRODUCTION
«"• In accordance with your request and authorization, GeoSoils, Inc. (GSI) is pleased to
In submit the following agricultural chemical residue survey on the subject property in the City
of Carlsbad. The purpose of this survey was to evaluate potential presence of restricted
"* agricultural residue contamination on the subject site. This survey is submitted to fulfill the
*• requirement of the City of Carlsbad's Standard Agricultural Area Mitigation Condition (for
agricultural sites). As a part of the mitigation condition, this report should be presented to
** the San Diego County Department of Environmental Health Site Assessment (EHS)
*" Voluntary Assistance Program for review and comment.
P">
The overall area of the subject parcel is 14.7 acres; however, 10 acres are proposed for
*" development. The land use history of the subject property has been provided in detail in
,. the Phase I Environmental Site Assessment report (GSI, 1998b); therefore, only a brief
, description is provided in the summary below.
SUMMARY
Based upon the information obtained during the course of this study, as well as information
provided in the referenced texts, GeoSoils, Inc. presents the following summary of findings,
conclusions, and recommendations:
• Review of readily available historical maps and photographs from 1891 to 1993
indicates that the majority of the subject property was developed for agricultural
purposes (i.e. truck crops) from at least 1960 to 1974. Photographs and maps from
1960 indicate that the majority of the site and vicinity is cultivated. Maps and photos
noted that the eastern third of the property appears to have been native brush and
no structures are present within the site boundary. By 1970 the western two-thirds
of the property appears to be cultivated, but crops are not discernable.
Greenhouse activity is first visible on property to the west (i.e., Carnation site) in
1974. At this time, truck crops (i.e., tomatoes) are visible throughout the majority
of the site as well as on property directly south. Crops are also visible on land to the
north, but do not appear to be similar to the onsite crops. What appear to be tractor
trailers are noted parked along the western edge of the site (along Black Rail Road);
however, no permanent structures are visible within the subject property boundary.
Although unimproved dirt roads are visible along the western and southern edges
of the site, as well as within the central and eastern portions of the site, no
agricultural activity is noted on the site in photographs from 1978. There are no
obvious signs of agricultural development, brush management, and/or dumping on
the subject property from 1978 to 1993.
Based upon our September 20, 1999 site work, the subject site is currently
undeveloped land. Vegetation has been removed from the level portions of the site,
with the surface of the property tilled. There are no obvious signs of the surface
staining on the property. Well developed native vegetation is present on the natural
slopes and in the canyons on the eastern portion of the property. Based upon the
site development plan, these slopes and canyons are to remain natural. A dirt road
and wooden power poles exist along the southern site boundary, with tire tracks
visible locally within the property limits. The site is bounded on the west by Black
Rail Road, on the northwest and southwest by undeveloped (and tilled) agricultural
land, on the northeast and east by natural open space areas, and on the southeast
by a graded but unimproved residential tract. Small localized areas of artificial fill
appear to have been placed at the top of natural drainages along the eastern and
northern edge of the mesa (GSI, 1998a). These fills, placed to create level
farmland, typically consists on native earth materials; however, these materials may
also contain generally non-hazardous organic and inorganic debris.
As a part of the referenced Phase I ESA (GSI, 1998b), Mr. Wes Witt (sole trustee of
the Hadley estate) was interviewed. Mr. Witt stated that it was his understanding the
site was farmed only once (i.e., 1997) since 1985 by the Tabata family, owners of
the adjacent parcels to the north and south. The Tabata family grew tomatoes on
the property, but Mr. Witt was unaware of any agricultural chemicals used onsite.
When contacted, Mr. Tabata stated that his family business, Tabata Brothers, Inc.,
was no longer in business. Mr. Tabata noted that permitted pesticides were used
on the tomato plants grown of the subject property in 1997. To the best of his
knowledge, however, his family had not farmed the Hadley site over the past 24 to
25 years. Mr. Tabata suggested Agri Chemical & Supply, Inc. be contacted for a list
of pesticides used on the property.
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Agri Chemical & Supply, Inc. provided a list of chemicals, consisting of insecticides
and fungicides, included Biobit, Ridomil ML72, Azinphos 50, Manzate 200, Asana
XL, Provado 1 .6, Bravo 500, Vydate, and Benlate. These agricultural chemicals do
not appear to be highly persistent in nature, with half-lives in soil reported to range
from four to ninety days (Mackey, Shiu, and Ma, 1997) and five days to 12 months
(United States EPA, 1998). Based upon information from Agri Chemical & Supply,
Inc., Biobit, Asana, Provado 1 .6 and Ridomil ML72 are not restricted use pesticides.
Azinphos-methyl and Vydate (i.e., Oxamyl) are restricted use pesticide (United
States EPA, 1998). Although Ridomil (i.e., Metalaxyl), Manzate (i.e., Mancozeb),
Vydate (i.e., Oxamyl), and Benlate (i.e., Benomyl) are listed in the United States EPA
Preliminary Remedial Goals (Smucker, 1998), Bravo 500 (i.e., Chlorothalonil) is the
only chemical listed as a carcinogen.
To evaluate the potential for restricted agricultural chemical residues onsite, surficial
soil samples were collected from depths of 1/2 foot and 1 1/2 feet within the ten (1 0)
acres planned for grading. To provide a representative sampling of earth materials
within the subject parcel, a total of twenty (20) samples were collected from ten
(10), one-acre grids. Soil samples collected from a depth of 1/2 foot were tested for
Chlorinated Pesticides and PCB's (EPA test method 8080), Organophosphorous
Pesticides (EPA test method 8140), and Chlorinated Herbicides (EPA test method
8150). Samples collected at a depth of 11/2 feet were tested for Chlorinated
Pesticides and PCB's (EPA test method 8080). Initially, samples from the 1 1/2-foot
depth were archived in the event Organophosphorous Pesticides and/or
Chlorinated Herbicides were detected in the 1/2-foot samples. Due to the absence
of permit records regarding above ground or underground storage tanks within the
site, as well as the lack of surface staining and/or historical signs of longterm vehicle
storage within the property boundary, testing for petroleum residues was not
completed. Sample locations are shown on the enclosed Site Map, Plates 1 , 2,
and 3.
Except for DDT, ODD, DDE (i.e., DDTf,^ ) and Toxaphene, no constituents of the
Chlorinated Pesticides and PCB's were reported above the laboratory detection
limits (i.e., non-detect). Concentrations of Toxaphene (0.1 63 mg/kg to 0.76 mg/kg)
and DDTffotai) (0.0056 mg/kg to 0.664 mg/kg) were detected in nine (9) of the ten
(10) samples collected from the 1/2-foot interval. Concentrations of Toxaphene (0.09
mg/kg to 0.21 mg/kg) and DDT^^ were detected in three (3) of nine (9) samples
collected from the 11/2-foot interval. In addition, Toxaphene was detected at a
concentration of 0.55 mg/kg (milligrams per kilogram) in a sample collected at a
depth of 1 foot (due to excavation refusal on hard formation). Data collected
indicate that concentrations of pesticides detected generally decrease with depth.
All chemical laboratory test results are presented in Appendix B.
For comparison purposes, regulatory action levels for hazardous waste criteria (i.e.,
Total Limit Threshold Concentration) for Toxaphene is 5.0 mg/kg and 1 .0 mg/kg for
Detected concentrations of Toxaphene onsite are at least 61/2 times lower
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than the TTLC criteria. Detected concentrations of DDT^^ onsite are at least 1 Vz
times lower than the TTLC criteria.
Where applicable, GSI has used existing regulatory data as a screening tool for the
detected concentrations of pesticides and other contaminants within the property.
Preliminary Remedial Goals (PRGs), which combine existing USEPA toxicity values
with generally accepted exposure factors to estimate concentrations in residential
soil that do not represent a cancer risk to humans greater than one-in-one
million (i.e., 1 x 10'6), are 1.7 mg/kg DDT^^ and 0.4 mg/kg for Toxaphene.
Concentrations of the contaminants detected onsite were found to be less than
established criteria for a hazardous waste. Concentrations of DDT^^ were also
found to be less than the criteria established as a potential risk to human health
(Smucker, 1998). Detected concentrations of DDT^,^ onsite are at least 21/2 times
lower than the PRG criteria. Detected concentrations of Toxaphene in seventy (70)
percent of the samples collected onsite are lower than the PRG criteria. Other than
the above, no detectable levels of other hazardous agricultural pesticides or
herbicides were reported in soil samples collected within the subject property.
• The regulatory action levels for hazardous waste criteria (Total Threshold Limit
Concentration-TTLC), the Preliminary Remediation Goals (PRGs) for chemical
residues (detected and non-detected onsite), and the chemical laboratory detection
limits (presented in Appendix B) were compared. In summary, detection limits
utilized by the testing laboratory were overall at least an order of magnitude (i.e., 10
times) below TTLC and PRG levels for all constituents except PCBs, which were at
least 4 times below the TTLC and PRG levels. It should be noted that PRG levels
were not available for all analytes tested; however, based upon the majority of
readily available regulatory limits, it appears likely that detection limits utilized by the
laboratory are suitable for agricultural-use chemicals.
• Based upon comparison of regulatory site screening values (i.e., Total Threshold
Limit Concentration and Preliminary Remedial Goals), it appears that remedial
measures are not required to mitigate residue concentrations of DDT^t^ detected
within the property. Remediation is, however, needed to mitigate residue
concentrations of Toxaphene detected within the property.
• Surface signs of water wells were not observed onsite during our site
reconnaissance. State of California regional groundwater maps from 1967 indicate
that no permitted water wells exist within the site. In addition, the Ground Water Site
Inventory (GWSI) database (dated March, 1998) by the United States Geological
Society (USGS) noted no water wells within a mile radius of the subject property.
Data provided in in-house geotechnical reports on properties located in the area
indicate that overall, groundwater was not encountered within 25 feet of the pre-
development surfaces. Based upon our experience in the project area, beneficial
use groundwater is not anticipated to be encountered within a depth of 50 feet.
"Perched" groundwater, where relatively impermeable fill and/or sediments underlie
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relatively permeable fill and/or sediments filled with water may be encountered at
shallower depths onsite, especially during the rainy season.
Based upon the characteristic immobility of pesticides, the overall density of terrace
deposits and bedrock underlying the subject property, as well as the estimated
depth to beneficial use groundwater, the likelihood is low that pesticide residues
detected in the upper 1 Vfe feet of earth materials within the subject site have affected
groundwater.
Based upon the scope of work completed, GSI concludes that the concentrations of
DDTgote,) detected in earth materials on the subject property are sufficiently below
Preliminary Remedial Goals (PRGs) so as not to represent a risk to human health. For
these concentrations, remedial earthwork is not recommended. Remedial earthwork is
recommended, however, to mitigate areas with reported concentrations of Toxaphene
above Preliminary Remedial Goals (PRGs), which potentially represent a risk to human
health. GSI's recommendation for burial of effected soils are to significantly limit the overall
impact chemical residues of the buried soils have on surface waters, groundwater(s),
and/or human health, both on the subject property and the immediate area. Based upon
the information obtained during the course of the assessment, GSI presents the following
recommendations:
• Surficial soils with concentrations of Toxaphene greater than the Preliminary
Remedial Goal criteria should not be placed within ten (10) feet of finish pad
grade(s) and/or five (5) feet of street subgrade to mitigate the potential for human
contact. Soils requiring remediation should not be placed in canyon bottoms or
below subdrains, where there is potential contact with groundwater. Affected soils
should be buried within the property boundary only, and placed so as not to
adversely affect surface water.
• GSI estimates that the upper one (1) foot of soils from six (6), one-acre grids (i.e.,
six acres) onsite will require remediation. Specifically, remedial earthwork is
required in the area covering all or a portion of Lots 3-11,15-17, 22-24, and 27-35
(See Plates 1,2 and 3). The estimated quantity of soils requiring remediation is on
the order of 9,680 cubic yards (yds3).
Review of the Site Map (Plates 1, 2 & 3) indicates that there are 67,000 ± square
feet of paved street proposed within "A" Street. Considering a burial depth of at
least five (5) feet, the depth of remedial earthwork is estimated to be on the order
of 9± feet below finish grade. These calculations indicate that there is sufficient area
within the site boundary to bury all affected soil.
• Removals and burial should be monitored by a representative of this office.
Sampling should be conducted at six (6) locations during grading (after removal of
the affected earth materials onsite) to verify that all affected earth materials have
been removed and buried. The specific areas of verification sampling for each tract
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is provided in the Recommendations section of this report. If detectable
concentrations of restricted pesticides are encountered, additional removal would
occur until earth materials with non-detectable concentrations are encountered.
Based upon the information collected by GSI during this survey, further studies or
action, other than the above, are not proposed from an environmental viewpoint, at
this time.
This investigation does not address or evaluate the potential for pesticide residue
contamination on any of the surrounding properties which have been historically utilized
for agricultural purposes during the same period. The conclusions and recommendations
provided in this report are based upon current regulatory guidelines for pesticide
contaminated soils due to legal application. Due to the dynamic nature of environmental
issues concerning the land use changes, there is some potential for future regulatory
requirements to be enacted that may affect the property.
If you have any questions pertaining to this report or we may be of further service, please
do not hesitate to contact this office. We appreciate the opportunity to be of service to you.
Respectfully submitted,
GeoSoils, Inc.Reviewed by:
Edward P. Lump
Director of Environmental Se
REA-1 2565, RG 5795, CEG 19;
David W. Skelly
Civil Engineer,
UoJhn P. Franklin
lanager, REA-1 1675, CEG 13
EPL/JPF/mo
Distribution: (3) Addressee
(1) Department of Environmental Health, Attention: Mr. Nasser Sionit, Ph.D.
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TABLE OF CONTENTS
INTRODUCTION 1
Purpose and Scope 1
Limitations and Exceptions 1
Terms and Conditions 1
SITE DESCRIPTION AND RECONNAISSANCE OBSERVATIONS 3
Site/Project Description 3
Proposed Development 3
Hydrogeology 3
Summary of Discussions With Persons Familiar With Site 4
SCOPE OF WORK - AGRICULTURAL CHEMICAL RESIDUE SURVEY 5
Preliminary Chemical Test Results 7
CONCLUSIONS AND RECOMMENDATIONS 9
Conclusions 9
Recommendations 11
LIMITATIONS 12
FIGURES:
Figure 1 - Site Location Map 2
ATTACHMENTS:
Appendix A - References Rear of Text
Appendix B - Laboratory Data Rear of Text
Plates 1 through 3 - Sample Location Maps Rear of Text in Pocket
GeoSoils, Inc.
AGRICULTURAL CHEMICAL RESIDUE SURVEY
HADLEY PROPERTY, APN 215-080-19,
CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA 92009
INTRODUCTION
Purpose and Scope
In accordance with our proposal and Client's (Ryland Homes) authorization, GeoSoils, Inc.
(GSI) is pleased to submit this agricultural chemical residue survey covering the subject
property, the location of which is illustrated in Figure 1. The purpose of this study was to
evaluate the potential presence of restricted agricultural chemical residues in soils on the
subject site from the permitted application of pesticides and/or herbicides historically to
crops.
The scope of work included:
1. A review of the subject property's geologic, hydrogeologic, and environmental
setting (Appendix A);
2. Completion of an agricultural chemical residue survey on the subject property
(Laboratory Data - Appendix B); and,
3. Preparation of this report which relates the findings of these studies and presents
GSI's conclusions and recommendations.
Limitations and Exceptions
This study does not include any of the following:
• Subsurface geotechnical evaluation of the subject property (GSI, 1998b);
• Groundwater sampling and analyses; and,
• Consideration of possible future contamination of the subject property from
adjacent or surrounding facilities or properties.
Terms and Conditions
This report is intended for the use of the Client (Ryland Homes). The contents should not
be relied upon by any party other than the aforementioned without the express written
consent of GSI. Exceptions to this include the San Diego County Department of
Environmental Health - Site Assessment Division (who will provide voluntary review of this
report) and the City of Carlsbad (who requires this survey as a Standard Agricultural Area
Mitigation Condition for agricultural sites).
GeoSoils, Inc.
Base Map: Encinitas Quadrangle, California—San Diego Co., 7.5 Minute Series (Topographic),
1968 (photo revised 1975), by USGS, 1"=2000'
1 «OiH THtl.Jw;. ....•, \ \ •
.rrf"sj ff ;^ \* ^ HV.^-N «f\\\w^ \ [ _ j^ :-^
Base Map: The Thomas Guide, San Diego County Street Guide and Directory, 1998 Edition, by
Thomas Bros. Maps, page 1127, 1"=1/2 mile
Reproduced with permission granted by Thomaa Bro«. Maps- -Thu map it copyrighted by Thomas Bros. Maps. It Is unlawful
to copy or reproduce all or any part thereof, whether for
personal use or resale, without permission. All rights reserved
w.o.
E2758-SC
SITE LOCATION MAP
Figure 1
This report does not consider possible future contamination of the subject property from
adjacent or surrounding facilities or properties. All judgements concerning adjoining
properties apply only to conditions observed during the time of the on-site reconnaissance.
SITE DESCRIPTION AND RECONNAISSANCE OBSERVATIONS
Site/Project Description
The undeveloped 14.7-acre property is located in the southern area of Carlsbad, west of
El Camino Real (S-11), south of Palomar Airport Road (S-12), and east of the San Diego
Freeway (I-5). Access to the site, located north of the Aviara development, is via Black Rail
Road off Alga Road (Figure 1). Black Rail Road, which comprises the western property
boundary, has been recently improved.
The site, which overall slopes in an easterly direction, is situated on an irregular mesa.
Two small knolls with an intermittent, roughly east-west trending drainage swale comprises
the western half of the site. The eastern half of the property is roughly level, descending
gently towards relatively steep natural slopes along the eastern and northeastern edge of
the site. Vegetation has been removed from that portion of the property planned for
development. Thick brush and vegetation is common on the natural slopes and in the
undisturbed canyons within the eastern portion of the site. Elevations onsite range from
roughly 375 feet Mean Sea Level (MSL) in the northwestern corner of the site, to
approximately 270 feet MSL in the canyon bottoms along the eastern and northeastern
sections of the property. Site conditions are shown on the Site Maps, Plates 1, 2, and 3,
which utilize a 1 "=40' scale tentative tract map prepared by Hunsaker & Associates (dated
May 21,1999) as a base map.
Proposed Development
Based upon the aforementioned tentative tract map (by Hunsaker & Associates, Inc.) of the
Hadley Property, the proposed development consists of thirty seven (37) single-family
residential lots, an open space lot (Lot 38), and interior roadways "A" and "B" Streets. It
is our understanding that typical cut and fill grading is proposed to generate the planned
property on only 10 acres of the site. City of Carlsbad municipal utilities are proposed.
Hydroaeoloay
The property lies within the Bataquitos Hydrologic Subarea (HSA 904.51) of the San
Marcos Hydrologic Area (HA 904.50) of the Carlsbad Hydrologic Unit (HU 904.00) within
the San Diego Region (State RWQCB, 1994). Carlsbad falls within Region 9 (San Diego)
of the State Regional Water Quality Control Board (RWQCB). Existing beneficial uses of
groundwater within this HSA are municipal and domestic supply, agricultural supply, and
industrial service supply. Overall, the local groundwater flow appears be in a southerly
direction, following natural drainages (see Figure 1).
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Surface signs of water wells were not observed onsite during our site reconnaissance.
Regional groundwater maps (State of California, 1967) indicate no permitted water wells
exist within the site. In addition, the Ground Water Site Inventory (GWSI) database (dated
March, 1998) by the United States Geological Society (USGS) reported no water wells
within a mile radius of the subject property. Data provided in in-house geotechnical reports
on properties located in the area indicate that overall, groundwater was not encountered
within 25 feet of the pre-development surfaces. Based upon our experience in the project
area, beneficial use groundwater is not anticipated to be encountered within a depth of 50
feet. "Perched" groundwater, where relatively impermeable fill and/or sediments underlie
relatively permeable fill and/or sediments filled with water may be encountered at shallower
depths onsite, especially during the rainy season. There was no surface water observed
within the property boundary, or in the immediate vicinity. Groundwater was not
encountered in any of the geotechnical test pits excavated on the site (GSI, 1998a).
Summary of Discussions With Persons Familiar With Site
Mr. Wes Witt, sole trustee of the Hadley estate was interviewed previously by phone (GSI,
1998b). Mr. Witt noted that Mr. Paul and Mrs. Peggy Hadley, long term owners of the
subject property, were deceased. Mr. Witt, involved with the Hadley estate since 1985,
noted that to the best of his knowledge, the site was farmed only one year in the last
fourteen years. Mr. Witt stated that the Tabata family, owners of the adjacent parcels to the
north and south, grew tomatoes on the property last year. He was unaware of any
agricultural chemicals used onsite, and suggested I contact the farmer, the Tabata family.
Mr. Tabata, contacted previously (GSI, 1998b), stated that his family company, Tabata
Brothers, Inc., was no longer in business. Mr. Tabata noted that legal pesticides were used
on last years tomato crops cultivated on the Hadley property. To the best of his
knowledge, Mr. Tabata though that his family also farmed the Hadley site over 24 years
ago. Mr. Tabata recommended that Agri Chemical Supply, Inc. be contacted regarding
agricultural chemicals used on the subject property by the Tabata Brothers.
Mr. Greg Omori with Agri Chemical Supply, Inc. was previously contacted by phone (GSI,
1998b). Mr. Omori provided a list of nine agricultural chemicals (i.e., fungicides,
insecticides) used by the Tabata Brothers on October 1,1998. The chemicals included
Biobit, Ridomil ML72, Azinphos 50, Manzate 200, Asana XL, Provado 1.6, Bravo 500,
Vydate, and Benlate. The reported half-lives of these chemicals in soil range from 4 to 90
days (Mackay, Ma, and Shiu, 1997). Bravo 500 (synonym-Chlorothalonil) is the only
agricultural chemical reported as a carcinogen in the United States EPA Preliminary
Remedial Goals; however, Ridomil (Metalaxyl), Manzate (Mancozeb), Vydate (Oxamyl), and
Benlate (Benomyl) are listed (Smucker, 1998). Based upon information provided by Mr.
Omori, Biobit, Ridomil ML72, Asana, and Provado are not restricted use chemicals. No
herbicides were reported to have been used by the Tabatas.
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GSI also previously contacted the County Department of Agriculture to verify the restricted
versus non-restricted nature of the agricultural chemical reported to have been used of the
subject property by Mr. Tabata and Mr. Omori (GSI, 1998b). The Pesticide Regulation
Division provided the following information.
Biobit - is a Bacillus chemical (bio-chemical) that is non-restricted.
Ridomil ML 72 - non-restricted fungicide, as is almost all fungicides.
Azinphos 50 - non-restricted.
Manzate 200- non-restricted.
Asana XL- listed as Esfenvalerate, a restricted insecticide.
Provado 1.6- Restricted and non-restricted, based upon use.
Bravo 500 - listed as Chlorothalonil, a restricted and non-restricted fungicide (based
upon use).
• Vydate - Restricted use insecticide.
• Ben late - non-restricted.
The United States Environmental Protection Agency (USEPA), in cooperation with Oregon
State University, provides information on pesticides via the National Pesticide
Telecommunication Network (NPTN). Specifically, the Extension Toxicology Network
(EXTOXNET) database provides pertinent information about pesticides (i.e., pesticide
profiles), including regulatory status, toxicological effects, ecological effects, environmental
fate, physical properties, and exposure guidelines.
Based upon the information, these agricultural chemicals are either General Use Pesticides
(GUP) or Restricted Use Pesticides (RUP). This classification appears to be based upon
toxicity, which ranges from EPA Class I (highly toxic) to EPA Class IV (practically nontoxic).
Of the agricultural chemicals reported to have been used onsite in 1997, Azinphos-methyl
and Vydate (Oxamyl) are listed as Class I. The remainder chemicals fall within Class II
(Bravo; Asana; Provado),Class III (Bacillus; Provado; Ridomil), or Class IV(Benlate;
Manzate). Overall, the reported half-lives of these chemical is soil range from 4 or 5 days
(Vydate and Azinphos-methyl) to 190 days (Provado). Additional information is available
through the database network or through this office.
SCOPE OF WORK - AGRICULTURAL CHEMICAL RESIDUE SURVEY
The agricultural chemical residue survey for the Hadley property consisted of twenty (20)
soil samples collected from the existing earth materials onsite. The ten (10) acres of
property proposed for development was divided into a one- acre grid pattern, with two (2)
samples collected within each grid. Soil samples were collected from a depth of Vfe foot
and 11/2 feet at a random location within each grid. Based upon our experience in the site
area, it is GSI's professional opinion that beneficial use groundwater exists at a depth
greater than 50 feet on the property; therefore, an evaluation of groundwater was not a part
of this assessment.
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Samples were collected by an environmental geologist on September 20, 1999. Holes
were excavated using a four (4) inch diameter hand auger. The stainless steel hand auger
was washed in a tri-sodium phosphate (TSP) solution and rinsed with clear water. The
auger was final rinsed with distilled water prior to each test hole. Soils encountered in our
holes consisted of dry to slightly moist, loose to dense, red brown to brown silty sands and
clayey sands. At a depth of 2 to 2Va feet, medium dense to dense and well cemented
terrace deposits were encountered in previous test excavations onsite (GSI, 1998a).
Samples were collected, stored and transported to a California Department of Health
Services (DHS) certified laboratory the same day, following proper procedures. A Chain-
of-Custody document, recorded with the laboratory, is included in Appendix B.
Based upon a list of 18 Hazardous Agricultural Substances generated by the San Diego
County Department of Environmental Health Services (EHS), chemical testing included the
following substances:
• Soil samples tested for Chlorinated Pesticides and RGB's, utilizing EPA test method
8080.
• Soil samples tested for Organophosphorous Pesticides, utilizing EPA test method
8140.
• Soil samples tested for Chlorinated Herbicides, utilizing EPA test method 8150.
Overall, our experience with similar farmlands in Carlsbad indicates the majority of
contaminants detected fall within the Chlorinated Pesticides suite (EPA test method 8080).
This suite of contaminants are known for their persistence in nature, and include pesticides
such as DDT and Toxaphene. Since the County of San Diego EHS does not recognize test
results from composite samples, the chemical laboratory conducted discrete chemical
analysis of the samples. In light of no permits/records available regarding above ground
and/or underground storage tanks within the site, as well as the lack of abandoned
vehicles and farm equipment observed on the subject property, as well as the absence of
surface staining throughout, testing for petroleum residues was not completed.
Initially, GSI requested the chemical laboratory to test all samples collected from the 1/2-foot
interval individually for the three suites of chemical tests presented above. Samples
collected from the 11/2-foot interval would be tested for contaminants by EPA test method
8080 only. These samples were archived for additional discrete testing in the event the 1/a-
foot interval samples detect concentrations of contaminants from the other two suites of
test methods (i.e., EPA test methods 8140 and 8150). This testing format typically allows
for detection of individual contaminants, eliminating needless repetition. Based upon all
constituents from all samples from the Va-foot interval reported as less than detection limits
for EPA test methods 8140 and 8150, further testing appeared to not be warranted.
Ryland Homes W.O. E2758-SC
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Preliminary Chemical Test Results
Based upon the laboratory test results, concentrations of DDT/DDD/DDE (i.e.,
were detected in nineteen (19) of the twenty (20) samples collected from the subject
property. Concentrations of Toxaphene (0.163 mg/kg to 0.76 mg/kg) and DDT^^ (0.0056
mg/kg to 0.664 mg/kg) were detected in nine (9) of the ten (10) samples collected from the
1/2-foot interval. Concentrations of Toxaphene (0.09 mg/kg to 0.21 mg/kg) and DDT^a,)
were detected in two (2) of nine (9) samples collected from the 11/2-foot interval. In
addition, Toxaphene was detected at a concentration of 0.55 mg/kg (milligrams per
kilogram) in a sample collected at a depth of 1 foot (due to excavation refusal on hard
sandstone formation). It should be noted that sloughing from the loose, overlying soils
was likely responsible for this atypical sample result. For comparison purposes, regulatory
action levels for hazardous waste criteria (i.e., Total Limit Threshold Concentration) for
Toxaphene is 5.0 mg/kg and 1.0 mg/kg for DDT^a,). Provided below (Table 1) are test
results, as well as criteria limits for the preliminary estimate of risk to human health (i.e.,
Preliminary Remedial Goals). Test results are provided in Appendix B.
TABLE 1
SUMMARY OF CHEMICAL TEST RESULTS
EPA TEST METHOD 8080
SAMPLE
LOCATION
ARS-1 @ 1/2'
ARS-1 @ r/z'
ARS-2 @ Vi
ARS-2@11/2'
ARS-3 @ 1/2'
ARS-3@11/2'
ARS-4 @ 1/2'
ARS-4@11/2'
ARS-5 @ 1/2'
ARS-5@11/2'
ARS-6 @ 1/2'
ARS-6@1V2'
ARS-7 @ 1/2'
ARS-7@11/2'
ARS-8 @ 1/2'
TOXAPHENE
(mg/kg}
0.165
0.135
0.163
<DL
0.224
<DL
0.59
<DL
0.26
0.09
0.64
<DL
0.47
<DL
0.71
PRQs*
(mg/kg)
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
0.40
DDT (TOTAL)
(mg/kg)
0.0076
0.0074
0.0085
<DL
0.0056
<DL
0.341
0.0232
0.162
0.09
0.06
0.0173
0.344
0.077
0.664
PRGs**
(mg/kg)
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1 .7/1 .7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
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SAMPLE
LOCATION
ARS-8@1'
ARS-9 @ 1/2'
ARS-9@11/2'
ARS-1 0@1/2'
ARS-10@1V2'
TOXAPHENE
(mg/kg)
0.55
0.76
0.21
<DL
<DL
PRGs*
(mg/kg)
0.40
0.40
0.40
0.40
0.40
DDT (TOTAL)
(mg/fcg)
0.599
0.413
0.194
<DL
0.0023
PRGs**
(mg/kg)
1 .7/1 .7/2.4
1 .7/1 .7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
1.7/1.7/2.4
* PRGs - Preliminary Remedial Goals - Toxaphene (Smucker, 1998)
** PRGs - Preliminary Remedial Goals - DDT/DDE/DDD (Smucker, 1998)
<DL - Less Than Laboratory Detection Limits
Laboratory test results were reported as "less than detection limits" for Organophosphorus
Pesticides (EPA test method 8140) and Chlorinated Herbicides (EPA test method 8150).
A summary of test results are provided in Table 2 below. Test results are provided in
Appendix B.
TABLE 2
SUMMARY OF CHEMICAL TEST RESULTS
EPA TEST METHODS 8140 and 8150
SAMPLE
LOCATION
ARS-1 @ V2 '
ARS-2 @ W
ARS-3 @ V2'
ARS-4 @ Va'
ARS-5 @ 1/2'
ARS-6 @ Vz
ARS-7 @ 1/2'
ARS-8 @ Va'
ARS-9 @ 1/z'
ARS-1 0@1/2'
ORGANOPHOSPHORUS
PESTICIDES
(mg/kg}
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
CHLORINATED
HERBICIDES
(mg/kg)
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL - Less Than Laboratory Detection Limits
By rule of thumb, if the Total Threshold Limit Concentration (TTLC) regulatory level is
exceeded on a substance, a CCR (California Code of Regulations) WET (Waste Extraction
Test) extraction should be conducted to evaluate the Soluble Threshold Limit
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Concentration (STLC). If the regulatory level for STLC of a substance is exceeded, then
it is considered a hazardous toxic waste. It should be noted however, that human health
based risk concentration levels, which are typically lower than hazardous waste criteria
concentrations, will more than likely be the default factor regarding the depth and amount
of remedial grading needed to mitigate concentrations of pesticides detected onsite.
Remedial grading may include (but not limited to) removal and burial of impacted earth
materials at locations and depths with which will effectively eliminate future human contact,
as well as eliminate potential impacts to surface water and groundwater. Guidelines for
remedial earthwork is discussed in detail in a later section of this report.
Residue concentrations of DDT^^ and Toxaphene detected in soil samples were also
compared to the Preliminary Remedial Goals (PRGs) for residential soil concentrations
(Smucker, 1998). PRG tables combine existing USEPA toxicity values with generally
accepted exposure factors to estimate concentrations in soil that do not represent a cancer
risk to humans greater than one-in-one million (i.e., 1 x 10~6). Exposure pathways
considered include ingestion, inhalation and dermal absorption. Chemical concentrations
presented in the PRG tables, therefore, can be directly compared to the residue
concentrations detected in soils within the property. The PRG tables may be used initially
in lieu of a health based risk assessment to determine the need for further evaluation of
sites with concentrations of known cancer-causing contaminants (i.e., site screening).
CONCLUSIONS and RECOMMENDATIONS
Conclusions
Based upon the information obtained during the course of this study, as well as information
provided in the referenced texts, GSI presents the following summary of findings,
conclusions, and recommendations:
Except for DDT, ODD, DDE (i.e., DDT^0^) and Toxaphene, no constituents of the
Chlorinated Pesticides and PCB's were reported above the laboratory detection
limits (i.e., non-detect). Concentrations of Toxaphene (0.1 63 mg/kg to 0.76 mg/kg)
and DDTfrotai) (0.0056 mg/kg to 0.664 mg/kg) were detected in nine (9) of the ten
(10) samples collected from the 1/2-foot interval. Concentrations of Toxaphene (0.09
mg/kg to 0.21 mg/kg) and DDT^^ were detected in three (3) of nine (9) samples
collected from the 11/2-foot interval. In addition, Toxaphene was detected at a
concentration of 0.55 mg/kg (milligrams per kilogram) in a sample collected at a
depth of 1 foot (due to excavation refusal on hard sandstone formation). Data
collected indicate that concentrations of pesticides detected decrease with depth.
All chemical laboratory test results are presented in Appendix B.
• For comparison purposes, regulatory action levels for hazardous waste criteria (i.e.,
Total Limit Threshold Concentration) for Toxaphene is 5.0 mg/kg and 1 .0 mg/kg for
Ryland Homes W.O. E2758-SC
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Detected concentrations of Toxaphene onsite are at least 6Vz times lower
than the TTLC criteria. Detected concentrations of DDT^,^ onsite are at least 1Va
times lower than the TTLC criteria.
• Where applicable, GSI has used existing regulatory data as a screening tool for the
detected concentrations of pesticides and other contaminants within the property.
Preliminary Remedial Goals (PRGs), which combine existing USEPAtoxicity values
with generally accepted exposure factors to estimate concentrations in residential
soil that do not represent a cancer risk to humans greater than one-in-one
million (i.e., 1 x 10'6), are 1.7 mg/kg DDT^,) and 0.4 mg/kg for Toxaphene.
Concentrations of the contaminants detected onsite were found to be less than
established criteria for a hazardous waste. Concentrations of DDT^,^ were also
found to be less than the criteria established as a potential risk to human health
(Smucker, 1998). Detected concentrations of DDT^^ onsite are at least 2Va times
lower than the PRG criteria. Detected concentrations of Toxaphene in seventy (70)
percent of the samples collected onsite are lower than the PRG criteria. Other than
the above, no detectable levels of other hazardous agricultural pesticides or
herbicides were noted in soil samples collected within the subject property.
• The regulatory action levels for hazardous waste criteria (Total Threshold Limit
Concentration-TTLC), the Preliminary Remediation Goals (PRGs) for chemical
residues (detected and non-detected onsite), and the chemical laboratory detection
limits (presented in Appendix B) were compared. In summary, detection limits
utilized by the testing laboratory were overall at least an order of magnitude (i.e., 10
times) below TTLC and PRG levels for all constituents except PCBs, which were at
least 4 times below the TTLC and PRG levels. It should be noted that PRG levels
were not available for all analytes tested; however, based upon the majority of
readily available regulatory limits, it appears likely that detection limits utilized by the
laboratory are suitable for agricultural-use chemicals.
• Based upon comparison of regulatory site screening values (i.e., Total Threshold
Limit Concentration and Preliminary Remedial Goals), it appears that remedial
measures are not required to mitigate residue concentrations of DDT^,^ detected
within the property. Remediation is, however, needed to mitigate residue
concentrations of Toxaphene detected within the property.
• Surface signs of water wells were not observed onsite during our site
reconnaissance. State of California regional groundwater maps from 1967 indicate
that no permitted water wells exist within the site. In addition, the Ground Water Site
Inventory (GWSI) database (dated March, 1998) by the United States Geological
Society (USGS) noted no water wells within a mile radius of the subject property.
Data provided in in-house geotechnical reports on properties located in the area
indicate that overall, groundwater was not encountered within 25 feet of the pre-
development surfaces. Based upon our experience in the project area, beneficial
Ryland Homes W.O. E2758-SC
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use groundwater is not anticipated to be encountered within a depth of 50 feet.
"Perched" groundwater, where relatively impermeable fill and/or sediments underlie
relatively permeable fill and/or sediments filled with water may be encountered at
shallower depths onsite, especially during the rainy season.
• Based upon the characteristic immobility of pesticides, the overall density of terrace
deposits and bedrock underlying the subject property, as well as the estimated
depth to beneficial use groundwater, the likelihood is low that pesticide residues
detected in the upper 11/2 feet of earth materials within the subject site have affected
groundwater.
Recommendations
Based upon the scope of work completed, GSI concludes that the concentrations of
DDT(Tota0 detected in earth materials on the subject property are sufficiently below
Preliminary Remedial Goals (PRGs) so as not to represent a risk to human health. For
these concentrations, remedial earthwork is not recommended. Remedial earthwork is
recommended, however, to mitigate areas with reported concentrations of Toxaphene
above Preliminary Remedial Goals (PRGs), which potentially represent a risk to human
health. GSI's recommendation for burial of effected soils are to significantly limit the overall
impact chemical residues of the buried soils have on surface waters, groundwater(s),
and/or human health, both on the subject property and the immediate area. Based upon
the information obtained during the course of the assessment, GSI presents the following
recommendations:
• Surficial soils with concentrations of Toxaphene greater than the Preliminary
Remedial Goal criteria should not be placed within ten (10) feet of finish pad
grade(s) and/or five (5) feet of street subgrade to mitigate the potential for human
contact. Soils requiring remediation should not be placed in canyon bottoms or
below subdrains, where there is potential contact with groundwater. Affected soils
should be buried within the property boundary only, and placed so as not to
adversely affect surface water.
• GSI estimates that the upper one (1) foot of soils from six (6), one-acre grids (i.e.,
six acres) onsite will require remediation. Specifically, remedial earthwork is
required in the area covering all or a portion of Lots 3-11,15-17, 22-24, and 27-35
(See Plates 1,2 and 3). The estimated quantity of soils requiring remediation is on
the order of 9,680 cubic yards (yds3).
• Review of the Site Map (Plates 1, 2 & 3) indicates that there are 67,000 ± square
feet of paved street proposed within "A" Street. Considering a burial depth of at
least five (5) feet, the depth of remedial earthwork is estimated to be on the order
of 9± feet below finish grade. These calculations indicate that there is sufficient area
within the site boundary to bury all affected soil.
Ryland Homes W.O. E2758-SC
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• Removals and burial should be monitored by a representative of this office.
Sampling should be conducted at six (6) locations during grading (after removal of
the affected earth materials onsite) to verify that all affected earth materials have
been removed and buried. The specific areas of verification sampling for each tract
is provided in the Recommendations section of this report. If detectable
concentrations of restricted pesticides are encountered, additional removal would
occur until earth materials with non-detectable concentrations are encountered.
• Based upon the information collected by GSI during this survey, further studies or
action, other than the above, are not proposed from an environmental viewpoint, at
this time.
The Client should understand that the final survey report will likely be reviewed by a local
regulatory oversight agency, such as the San Diego County Department of Health
Services. Actual mitigation requirements (if any) will be provided based upon their review
comments. Consultation with a qualified environmental lawyer (in California) should be
considered regarding public disclosures and other environmental issues.
LIMITATIONS
GSI has performed the services for this project in accordance with the terms of a contract
between GSI and Client and in accordance with current professional standards for
investigations of this type. The conclusions presented in this report are based on the
information collected during the study, the present understanding of the site conditions,
and professional judgment.
Please note, subsurface and hazardous waste/toxic substance conditions may vary from
those provided in historical documents reviewed by GSI. The interpretations and
recommendations of GSI are based solely on such information and/or information supplied
by Client. Findings of this assessment based on data provided by others carries no
warranty, expressed or implied, as a result of the usage of such data.
It is possible that future assessments may reveal additional data or variations of the current
data which may require the current conclusions and recommendations to be reevaluated.
As a result, GSI makes no warranty, either express or implied, as to its findings, opinions,
recommendations, specifications, or professional advice except that they were
promulgated after being prepared in accordance with generally accepted standards of care
and diligence normally practiced by recognized consulting firms performing services of a
similar nature.
The information in this report is relevant to the date of the site work and should not be
relied on to represent conditions at any later date. Facts, conditions, and acceptable risk
factors change with time, accordingly, this report should be viewed within this context.
Ryland Homes W.O. E2758-SC
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E
E : -'
E
E :
EE ' : :' ;'
. APPENDIX A
REFERENCES
E
C
C •'•
i
C
E
E
E
E
APPENDIX A
REFERENCES
California, State of, Environmental Protection Agency, 1992, "Supplemental Guidance for
Human Health Multimedia Risk Assessments of Hazardous Waste Sites and
Permitted Facilities," chapter 8, "DDT in Soil" Guidance for the assessment of health
risk to humans, dated July.
California Regional Water Quality Control Board, San Diego Region, Water quality control
plan, San Diego Basin (9), dated September 8 (Approved 1995).
County of San Diego, Environmental Health Services, 1996, Site assessment and
mitigation (SA/M), manual.
GeoSoils, Inc., 1999, Preliminary Summary of Agricultural Chemical Residue Survey,
Hadley Property, City of Carlsbad, California, W.O. E2758-SC, dated September 27.
GeoSoils, lnc.,1998a, Preliminary Geotechnical Evaluation, Hadley Property, City of
Carlsbad, California, W.O. 2541-A-SC, dated November 12.
, 1998b, Phase I Environmental Site Assessment, Hadley Property, City of Carlsbad,
San Diego County, California 92009, W.O. E2541-SC, by GeoSoils, Inc., dated
October 6.
Mackay, D., Shiu, W., Ma, K., 1997, Illustrated Handbook of Physical-Chemical Properties
and Environmental Fate for Organic Chemicals, volume V, Pesticide Chemicals,
Lewis Publishers, CRC Press LLC.
Oregon State University, 1995-1996 revisions, The Extension Toxicology Network
(EXTOXNET), electronic files in cooperative effort with Univ. Of Calif.-Davis,
Michigan State Univ., Cornell Univ., and Univ. Of Idaho.
Smucker, Stanford J., United States Environmental Protection Agency (USEPA), Region
IX, Region 9 Preliminary Remediation Goals (PRGs) 1998, expires May 1,1999.
State of California - Department of Health Services, 1990, California Statewide Radon
Survey Results, p. 9.
State of California, 1967, Department of Water Resources, Bulletin 106-2, Groundwater
occurrence and quality: San Diego Region, vol. II: plates, dated June.
Waxman, Michael F., 1998, Agrochemical and Pesticide Safety Handbook, Lewis
Publishers, CRC Press LLC.
GeoSoils, Inc.
G
E
- APPENDIX B
I
LABORATORY DATAE .:: ;: :
c '..-.••• :;
E
c
E
E
E
I
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date of Report: 9/24 and 10/5/99
Sampling Date: 9/20/99
Date Sample Received: 9/20/99
Time Sample Received: 3:35 PM
Date Extracted: 9/20,22 and 23/99
Date Analyzed: September 21,28 and 30,1999
Analyzed By: EA
Sample Type: Soil
Project Name: E2758-SC
Log Numbers: 99-2723 to 99-2742
The sample(s) were analyzed with EPA methodology or equivalent methods as
specified on the attached "Analyses Results" report. The symbol for "less than"
indicates a value below the reportable detection limit.
The results of these analyses and the quality control data are enclosed.
Ellen Atienza
Operations Manager
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta-BHC
Gamma - BHC
Delta - BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB-1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB -1254
PCB - 1260
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.0005
0.0004
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2723
ARS-1®1/!'
<DL
0.0026
0.005
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.165
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
99-2724
ARS - 1 @ 1 W
<DL
0.0024
0.005
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.135
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza
Operations Mana'ger
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta-BHC
Gamma - BHC
Delta - BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB-1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB -1254
PCB - 1260
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.0005
0.0004
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2725
ARS-2@'/i'
<DL
0.0032
0.0053
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.163
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
99-2726
ARS - 2 @ 1 '/i'
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza
Operations Manager
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - ODD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta -BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB -1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.0005
0.0004
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2727
ARS-3®1/,'
<DL
0.0018
0.0038
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.224
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
99-2728
ARS - 3 @ 1 '/2'
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza
Operations Manager
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' -DDE
4,4' -DDT
Aldrin
Alpha- BHC
Beta - BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB -1221
PCB - 1232
PCB -1242
PCB - 1248
PCB -1254
PCB -1260
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.01
0.008
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2729
ARS - 4 @ W *DF
<DL
0.216 20
0.125 20
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.59
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza'
Operations Manager
* DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - ODD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta - BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB - 1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
Detection
Limit
0.0005
0.0005
0.0004
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
»i
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Log Number:
Sample ID:
99-2730
ARS-4@1'/,'
<DL
0.015
0.0082
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
99-2734
ARS - 6 @ 1 V4*
<DL
0.012
0.0053
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza "<r
Operations Manager
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' -DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta -BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB -1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
^"*^ *^**4 "*
Detection
Limit
0.0005
0.01
0.008
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
-^»
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Log Number:
Sample ID:
99-2731
ARS - 5 @ W *DF
<DL
0.096 20
0.066 20
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.26
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza I
Operations Manager
* DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta-BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB-1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.01
0.008
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2732
ARS-5@l'/2' *DF
<DL
0.055 20
0.035 20
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.09
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza
Operations Manager
' DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - ODD
4,4' -DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta - BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB - 1221
PCB - 1232
PCB - 1242
PCB -1248
PCB - 1254
PCB - 1260
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.01
0.008
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2733
ARS - 6 @ W *DF
<DL
0.304 20
0.244 20
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.64
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza
Operations Manager
* DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta - BHC
Gamma - BHC
Delta - BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB - 1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
rag/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.01
0.008
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2735
ARS - 7 @ W *DF
<DL
0.220 20
0.124 20
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.47
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza \
Operations Manager
1 DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858)566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - ODD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta -BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB - 1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.01
0.008
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2737
ARS - 8 @ W *DF
<DL
0.380 20
0.284 20
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.71
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza\
Operations Manager
* DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - ODD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta -BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB - 1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
V/|TI>^— ** \~**-^***
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.025
0.020
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2738
ARS-8@1'
(Refusal) *DF
<DL
0.385 50
0.214 50
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.55
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza r
Operations Manager
* DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta -BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB - 1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
> i •*^*~ir^ \
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.025
0.020
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
99-2739
ARS-9®1/,' *DF
<DL
0.231 50
0.182 50
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.76
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza
Operations Manager
' DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta - BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB - 1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
JC
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Detection Log Number:
Limit Sample ID:
0.0005
0.010
0.008
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
-- — r
99-2740
ARS-9@l'/2' *DF
<DL
0.111 20
0.083 20
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
0.21
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza (/
Operations Manager
* DF= Dilution Factor. The Detection Limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - ODD
4,4' - DDE
4,4' -DDT
Aldrin
Alpha- BHC
Beta - BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB -1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
\~f^)( ^LQ^~~*
Detection
Limit
0.0005
0.0005
0.0004
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
rag/kg
9/20/99
9/21/99
Log Number:
Sample ID:
99-2736
ARS - 7 @ 1 '/»'
<DL
0.013
0.064
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
99-2741
ARS - 10 @ '/i'
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza
Operations Manager
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA. 92008
Attn: Mr. Ed Lump
Date Of Report:
Date Sample Received:
Time Sample Received:
Sampling Date :
Analyzed By :
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
ANALYSIS
4,4' - DDD
4,4' - DDE
4,4' - DDT
Aldrin
Alpha- BHC
Beta -BHC
Gamma - BHC
Delta -BHC
Dieldrin
Endosulfan I
Endosulfan II
Endosulfan Sulfate
Endrin
Endrin Aldehyde
Endrin Ketone
Heptachlor
Heptachlor Epoxide
Methoxychlor
Toxaphene
Chlordane (Tech / Total)
PCB- 1016
PCB - 1221
PCB - 1232
PCB - 1242
PCB - 1248
PCB - 1254
PCB - 1260
Detection
Limit
0.0005
0.0005
0.0004
0.0002
0.0006
0.0006
0.0003
0.0006
0.0003
0.0003
0.0005
0.0004
0.0004
0.0005
0.0005
0.0002
0.0003
0.01
0.025
0.01
0.05
0.05
0.05
0.05
0.05
0.05
0.05
9/24/99
9/20/99
3:35 PM
9/20/99
EA
Soil
EPA 3550/3620/8080
mg/kg
9/20/99
9/21/99
Log Number:
Sample ID:
99-2742
ARS - 10 @ 1 %'
<DL
0.0014
0.0009
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
<DL
Ellen Atienza \
Operations Manager
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
QUALITY CONTROL DATA REPORT
Date: 9/24/99
Attn: Mr. Ed Lump
Log #: 99-2723 to 99-2742
Date Extracted: 9/20/99
Date Analyzed: September 21,1999
Extraction Method: EPA 3550 / 3620
Analysis Method: EPA 8080
METHOD BLANK
No target analytes were detected in the method blank.
LABORATORY CONTROL STANDARD
Compound % Recovery QC Limits % *
G-BHC(Lindane) 93 32-127
Heptachlor 91 34-111
Aldrin 96 42-122
Dieldrin 102 36-146
Endrin 124 30-147
4,4' DDT 99 25-160
MATRIX SPIKE RESULTS (99-2734)
Compound Spike Spike Dup. MS/MSD
% Recovery % Recovery RPD %
G-BHC (Lindane) 75 77 3
Heptachlor 88 91 3
Aldrin 85 86 1
Dieldrin 86 88 2
Endrin 122 128 5
4,4-DDT 142 151 6
QUALITY CONTROL TERMINOLOGY
LCS - LABORATORY CONTROL SAMPLE. Reported as % recovery of an independent standard carried through all
sample preparation procedures to verify method performance. Acceptable range is based on historical laboratory control data
and EPA requirements. Any out-of-control QC data is clearly indicated.
Spike- environmental sample is matrix spiked with method compounds and % recovery of concentration spiked into sample is
calculated. Reported as % recovery. Acceptable range for "Normal Matrix Sample" is based on historical laboratory control
data. Any out-of-control QC data is clearly indicated.
Surrogates- Compounds representative of a group of compounds. Surrogates are spiked into environmental samples and %
recovery of concentration spiked is calculated and reported. Acceptable range varies depending on sample matrix and analysis
method. Any out-of-control QC data is clearly indicated.
Pagel
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
SURROGATE RECOVERIES
(Tetrachloro-M-Xylene)
Log# Percent Recovery;
Method Blank
99-2723
99-2724
99-2725
99-2726
99-2727
99-2728
99-2729
99-2730
99-2731
99-2732
99-2733
99-2734
99-2735
99-2736
99-2737
99-2738
99-2739
99-2740
99-2741
99-2742
99-2743
99-2734 MS
99-2734 MSB
LCS
112%
69%
84%
79%
87%
79%
79%
87%
88%
87%
85%
83%
86%
83%
90%
91%
92%
96%
*
*
*
*
100%
97%
105%
QC Limits: 43 to 169%
* No surrogate added. No corrective action taken.
Ellen Atienza
Operations Manager
QUALITY CONTROL TERMINOLOGY
LCS - LABORATORY CONTROL SAMPLE. Reported as % recovery of an independent standard carried through all
sample preparation procedures to verify method performance. Acceptable range is based on historical laboratory control data
and EPA requirements. Any out-of-control QC data is clearly indicated.
Spike- environmental sample is matrix spiked with method compounds and % recovery of concentration spiked into sample is
calculated. Reported as % recovery. Acceptable range for "Normal Matrix Sample" is based on historical laboratory control
data. Any out-of-control QC data is clearly indicated.
Surrogates- Compounds representative of a group of compounds. Surrogates are spiked into environmental samples and %
recovery of concentration spiked is calculated and reported. Acceptable range varies depending on sample matrix and analysis
method. Any out-of-control QC data is clearly indicated.
Page 2
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received
Analyzed By:
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
Analysis
2,4,5 -T
2,4, DB
2,4, -D
Dalapon
Dicamba
Dichloroprop
Dinoseb
MCPA
MCPP
Pentachlorophenol
Silvex
Detection
Limit
0.0012
0.005
0.0011
0.0005
0.0006
0.0008
0.0011
0.20
0.15
0.001
0.0012
10/5/99
9/20/99
9/20/99
3:35 PM
EA
Soil
EPA 8150
mg/kg
9/23/99
9/30/99
Log Number:
Sample ID:
99-2723
ARS - 1 @ %'
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
99-2725
*DF ARS- 2®%' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
Ellen Atienza
Operations Manager
DF= Dilution Factor. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received
Analyzed By:
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
Analysis
2,4,5 -T
2,4, DB
2,4, -D
Dalapon
Dicamba
Dichloroprop
Dinoseb
MCPA
MCPP
Pentachlorophenol
Silvex
:
Detection
Limit
0.0012
0.005
0.0011
0.0005
0.0006
0.0008
0.0011
0.20
0.15
0.001
0.0012
10/5/99
9/20/99
9/20/99
3:35 PM
EA
Soil
EPA 8150
mg/kg
9/23/99
9/30/99
Log Number:
Sample ID:
99-2727
ARS - 3 @ VS'
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
99-2729
*DF ARS-4@1/i' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
Ellen Atienza
Operations Manager
• DF= Dilution Factor. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received
Analyzed By:
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
Analysis
2,4,5 -T
2,4, DB
2,4, -D
Dalapon
Dicamba
Dichloroprop
Dinoseb
MCPA
MCPP
Pentachlorophenol
Silvex
Detection
Limit
0.0012
0.005
0.0011
0.0005
0.0006
0.0008
0.0011
0.20
0.15
0.001
0.0012
10/5/99
9/20/99
9/20/99
3:35 PM
EA
Soil
EPA 8150
rag/kg
9/23/99
9/30/99
Log Number:
Sample ID:
99-2731
ARS - 5 @ '/
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
99-2733
V *DF ARS- 6®%' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
Ellen Atienza »
Operations Manager
DF= Dilution Factor. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received
Analyzed By:
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
Analysis
2,4,5 -T
2,4, DB
2,4, -D
Dalapon
Dicamba
Dichloroprop
Dinoseb
MCPA
MCPP
Pentachlorophenol
Silvex
••
Detection
Limit
0.0012
0.005
0.0011
0.0005
0.0006
0.0008
0.0011
0.20
0.15
0.001
0.0012
10/5/99
9/20/99
9/20/99
3:35 PM
EA
Soil
EPA 8150
mg/kg
9/23/99
9/30/99
Log Number:
Sample ID:
99-2735
ARS - 7 @ '/*' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
99-2737
ARS - 8 @ %' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
Ellen Atienza
Operations Manager
DF= Dilution Factor. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received
Analyzed By:
Sample Type:
Method:
Unit:
Date Extracted:
Date Analyzed:
Analysis
2,4,5 -T
2,4, DB
2,4, -D
Dalapon
Dicamba
Dichloroprop
Dinoseb
MCPA
MCPP
Pentachlorophenol
Silvex
:
Detection
Limit
0.0012
0.005
0.0011
0.0005
0.0006
0.0008
0.0011
0.20
0.15
0.001
0.0012
10/5/99
9/20/99
9/20/99
3:35 PM
EA
Soil
EPA 8150
mg/kg
9/23/99
9/30/99
Log Number:
Sample ED:
99-2739
ARS - 9 @ l/2
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
99-2741
' *DF ARS-IO®1/!' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
Ellen Atienza
Operations Manager
DF= Dilution Factor. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
QUALITY CONTROL DATA REPORT
Date: 10/5/99
Attn: Mr. Ed Lump
Log # 99-2723,99-2725,99-2727,99-2729,99-2731,99-2733,
99-2735,99-2737,99-2739 and 99-2741
Date Extracted: 9/23/99
Date Analyzed: September 30,1999
Extraction Method: EPA 8150
Analysis Method: EPA 8150
Method Blank
NO TARGET ANALYTES WERE DETECTED IN THE METHOD BLANK.
LABORATORY CONTROL STANDARD
COMPOUND % RECOVERY
2,4-D 117
2,4,5 - TP (SILVEX) 108
2,4,5-T 113
MATRIX SPIKE RESULTS (99-2723)
COMPOUND SPIKE SPIKE DUP
% RECOVERY % RECOVERY RPD %
2,4-D 140 140 0
2,4,5,-TP (SILVEX) 62 72 15
2,4,5-T 108 108 0
QUALITY CONTROL TERMINOLOGY
LCS - LABORATORY CONTROL SAMPLE. Reported as % recovery of an independent standard carried through all
sample preparation procedures to verify method performance. Acceptable range is based on historical laboratory control data
and EPA requirements. Any out-of-control QC data is clearly indicated.
SPIKE- environmental sample is matrix spiked with method compounds and % recovery of concentration spiked into sample is
calculated. Reported as % recovery. Acceptable range for "Normal Matrix Sample" is based on historical laboratory control
data Any out-of-control QC data is clearly indicated.
SURROGATES- Compounds representative of a group of compounds. Surrogates are spiked into environmental samples and
% recovery of concentration spiked is calculated and reported. Acceptable range varies depending on sample matrix and
analysis method. Any out-of-control QC data is clearly indicated.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858)566-4540 FAX (858) 566-4542
SURROGATE RECOVERIES
(DCAA)
Logfl Percent Recovery;
Method Blank
99-2723
99-2725
99-2727
99-2729
99-2731
99-2733
99-2735
99-2737
99-2739
99-2741
99-2723 MS
99-2723 MSD
LCS
100%
159%
64%
92%
87%
97%
79%
54%
51%
58%
69%
67%
50%
71%
QC Limits: 50 to 170%
Ellen Atienza •
Operations Manager
QUALITY CONTROL TERMINOLOGY
LCS - LABORATORY CONTROL SAMPLE. Reported as % recovery of an independent standard carried through all
sample preparation procedures to verify method performance. Acceptable range is based on historical laboratory control data
and EPA requirements. Any out-of-control QC data is clearly indicated.
SPIKE- environmental sample is matrix spiked with method compounds and % recovery of concentration spiked into sample is
calculated. Reported as % recovery. Acceptable range for "Normal Matrix Sample" is based on historical laboratory control
data. Any out-of-control QC data is clearly indicated.
SURROGATES- Compounds representative of a group of compounds. Surrogates are spiked into environmental samples and
% recovery of concentration spiked is calculated and reported. Acceptable range varies depending on sample matrix and
analysis method. Any out-of-control QC data is clearly indicated.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858)566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received:
Analyzed By:
Sample Type:
Method :
Unit:
Date Extracted:
Date Analyzed:
Analysis
Dichlorvos
Mevinphos
Demeton-O
Ethoprop
Naled
Phorate
Demeton-S
Diazinon
Disulfoton
Methyl Parathion
Ronnel
Fenthion
Chlorpyrifos
Trichlornate
Gardona
Tokuthion
Merphos
Fensulfothion
Bolstar
Azinphos Methyl
Coumaphos
Detection
Limit
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.01
0.005
0.005
0.005
10/5/99
9/20/99
9/20/99
3:32 PM
EA
Soil
EPA 3550/8140
mg/kg
9/22/99
9/28/99
Log Number:
Sample ID:
99-2723
ARS - 1 @ W *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
99-2725
ARS - 2 @ '/2' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
Ellen Atienza **
Operations Manager
*DF= DILUTION FACTOR. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received:
Analyzed By:
Sample Type:
Method :
Unit:
Date Extracted:
Date Analyzed:
Analysis
Dichlorvos
Mevinphos
Demeton-O
Ethoprop
Naled
Phorate
Demeton-S
Diazinon
Disulfoton
Methyl Parathion
Ronnel
Fenthion
Chlorpyrifos
Trichlornate
Gardona
Tokuthion
Merphos
Fensulfothion
Bolstar
Azinphos Methyl
Coumaphos
Detection
Limit
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.01
0.005
0.005
0.005
^-
10/5/99
9/20/99
9/20/99
3:32 PM
EA
Soil
EPA 3550/8140
rag/kg
9/22/99
9/28/99
Log Number:
Sample ID:
99-2727
ARS-3@'/2' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
99-2729
ARS - 4 @ W *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
Ellen Atienza
Operations Manager
*DF= DILUTION FACTOR. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received:
Analyzed By:
Sample Type:
Method :
Unit:
Date Extracted:
Date Analyzed:
Analysis
Dichlorvos
Mevinphos
Demeton-O
Ethoprop
Naled
Phorate
Demeton-S
Diazinon
Disulfoton
Methyl Parathion
Ronnel
Fenthion
Chlorpyrifos
Trichlornate
Gardona
Tokuthion
Merphos
Fensulfothion
Bolstar
Azinphos Methyl
Coumaphos
Detection
Limit
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.01
0.005
0.005
0.005
10/5/99
9/20/99
9/20/99
3:32 PM
EA
Soil
EPA 3550/8140
mg/kg
9/22/99
9/28/99
Log Number:
Sample ID:
99-2731
ARS - 5 @ W *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
99-2733
ARS - 6 @ Vi' *DF
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
<D.L.
Ellen Atienza '
Operations Manager
*DF= DILUTION FACTOR. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received:
Analyzed By:
Sample Type:
Method :
Unit:
Date Extracted:
Date Analyzed:
Analysis
Dichlorvos
Mevinphos
Demeton-O
Ethoprop
Naled
Phorate
Demeton-S
Diazinon
Disulfoton
Methyl Parathion
Ronnel
Fenthion
Chlorpyrifos
Trichlornate
Gardona
Tokuthion
Merphos
Fensulfothion
Bolstar
Azinphos Methyl
Coumaphos
Detection
Limit
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.01
0.005
0.005
0.005
10/5/99
9/20/99
9/20/99
3:32 PM
EA
Soil
EPA 3550/8140
mg/kg
9/22/99
9/28/99
Log Number:
Sample ID:
99-2735
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99-2737
i' *DF ARS-8@'/2' *DF
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Ellen AtienzaH
Operations Manager
*DF= DILUTION FACTOR. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
GEOSOILS
5741 Palmer Way
Carlsbad, CA 92008
Attn: Mr. Ed Lump
Date Of Report:
Sampling Date:
Date Sample Received:
Time Sample Received:
Analyzed By:
Sample Type:
Method :
Unit:
Date Extracted:
Date Analyzed:
Analysis
Dichlorvos
Mevinphos
Demeton-O
Ethoprop
Naled
Phorate
Demeton-S
Diazinon
Disulfoton
Methyl Parathion
Ronnel
Fenthion
Chlorpyrifos
Trichlornate
Gardona
Tokuthion
Merphos
Fensulfothion
Bolstar
Azinphos Methyl
Coumaphos
Detection
Limit
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.005
0.01
0.005
0.005
0.005
10/5/99
9/20/99
9/20/99
3:32 PM
EA
Soil
EPA 3550/8140
mg/kg
9/22/99
9/28/99
Log Number:
Sample ID:
99-2739
ARS - 9 @ '/z'
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99-2741
*DF ARS - 10 @ '/i' *DF
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Ellen Atienza
Operations Manager
*DF= DILUTION FACTOR. The detection limits and analyses results were corrected accordingly.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
QUALITY CONTROL DATA REPORT
Date: 10/5/99
Attn: Mr. Ed Lump
Log#: 99-2723,99-2725,99-2727,99-2729,99-2731,99-2733,
99-2735,99-2737,99-2739 and 99-2741
Date Extracted: 9/22/99
Date Analyzed: September 28,1999
Extraction Method: EPA 3550
Analysis Method: EPA 8140
Method Blank
No target analytes were detected in the method blank.
Laboratory Control Sample % Recovery
Diazinon 90
Gardona (Stirophos) 119
Methyl Parathion 100
Mevinphos 91
Naled 108
Matrix Spike Results (99-2731)
Compound Spike Spike Dup MS/MSD
% Recovery % Recovery RPD %
Diazinon 84 86 2
Dichlorvos 85 86 1
Dursban (Chlorpyrifos) 90 80 2
Methyl Parathion 86 83 4
Naled 90 92 1
QUALITY CONTROL TERMINOLOGY
LCS - LABORATORY CONTROL SAMPLE. Reported as % recovery of an independent standard carried through all
sample preparation procedures to verify method performance. Acceptable range is based on historical laboratory control data
and EPA requirements. Any out-of-control QC data is clearly indicated.
Spike- environmental sample is matrix spiked with method compounds and % recovery of concentration spiked into sample is
calculated. Reported as % recovery. Acceptable range for "Normal Matrix Sample" is based on historical laboratory control
data. Any out-of-control QC data is clearly indicated.
Surrogates- Compounds representative of a group of compounds. Surrogates are spiked into environmental samples and %
recovery of concentration spiked is calculated and reported. Acceptable range varies depending on sample matrix and analysis
method. Any out-of-control QC data is clearly indicated.
D-TEK Analytical Laboratories, Inc.
9020 Kenamar Drive, Suite 205
San Diego, CA 92121
(858) 566-4540 FAX (858) 566-4542
SURROGATE RECOVERIES
(TRIBUTYLPHOSPHATE)
Log# Percent Recovery;
Method Blank 140%
99-2723 52%
99-2725 64%
99-2727 66%
99-2729 66%
99-2731 70%
99-2733 76%
99-2735 76%
99-2737 86%
99-2739 76%
99-2741 76%
99-2731 MS 104%
99-2731MSD 98%
QC Limits: 50 to 170%
Ellen Atienza
Operations Manager
QUALITY CONTROL TERMINOLOGY
LCS - LABORATORY CONTROL SAMPLE. Reported as % recovery of an independent standard carried through all
sample preparation procedures to verify method performance. Acceptable range is based on historical laboratory control data
and EPA requirements. Any out-of-control QC data is clearly indicated.
Spike- environmental sample is matrix spiked with method compounds and % recovery of concentration spiked into sample is
calculated. Reported as % recovery. Acceptable range for "Normal Matrix Sample" is based on historical laboratory control
data. Any out-of-control QC data is clearly indicated.
Surrogates- Compounds representative of a group of compounds. Surrogates are spiked into environmental samples and %
recovery of concentration spiked is calculated and reported. Acceptable range varies depending on sample matrix and analysis
method. Any out-of-control QC data is clearly indicated.
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D-TEK POLICIES
Fee Schedule Criteria / Discounts: Fees are established from our fixed list prices, with the exception of
non-routine analyses requiring supplemental research, method development, extensive QA/QC reporting
data, not ^routine detection limits, or additional materials. Fixed prices are applied to routine analyses and
reporting formats. The prices for non-routine analyses are assessed on a "time and materials" basis.
Expedited turnaround times for sample analyses may be arranged with advanced notice. Surcharges are
applied to the prices of analyses requiring expedited turnaround times.
Discounts are extended for projects involving large numbers of samples, or on a contractual arrangement.
Please call our office for price quotations.
Turnaround Time: Standard turnaround time is five to seven (5-7) working days for verbal results, with a
written report following within three (3) working days. Expedited turnaround times may be arranged with
advanced notice and are subject to a surcharge. Samples received after 5:00 PM on regular working days
are considered as being received at 8:00 AM on the next working day and turnaround time begins at that
point.
Surcharges: Standard turnaround time (TAT) is five to seven (5-7) working days. On expedited
turnaround times the following surcharge factors apply: Three (3) day TAT (X) 1.2, Two (2) day TAT
(X) 1.5, One (1) day TAT (X) 2.0 and Same Day TAT (X) 2.5.
Holding Times: Holding times are carefully monitored at D-TEK since this is a vital part of Quality
Control procedures. D-TEK will make every effort to perform analyses within the applicable holding
times established by the Environmental Protection Agency (EPA) or equivalent methodology. We reserve
the right to apply a surcharge to prices if the sample holding time dictates sample processing within a
specified time that would otherwise not be performed within our standard turnaround time.
PaymenfcJPavment for pre-approved accounts is net 30 days from the date of invoice. On all analyses that
are done on other than pre-approved accounts, payment must accompany the sample at the time of the
sample delivery unless credit is approved by D-TEK. Cash, checks, money order or Visa / MasterCard are
acceptable forms of payment. D-TEK has a forty dollar ($40) minimum laboratory/data generation fee per
visit. Without pre-approved credit, no analyses will begin until payment is received in full.
Sample Archiving: After thirty (30) calendar days, samples will be disposed of or returned to customer.
D-TEK will not be held responsible for reanalysis of samples after this time. Samples stored after 30
calendar days are subject to an archiving fee of $5.00 per sample per month. Samples received with
instructions to only "hold" or "store" are subject to an archiving fee commencing on the date of receipt.
However, if analytical work is performed within the thirty (30) days, the archiving fee is suspended until
another thirty (30) days have passed.
Hazardous Samples: Hazardous samples will be returned to the client. Samples that D-TEK deems as
"hazardous" or difficult to dispose of are subject to a disposal fee per sample.
Reporting Results: Analyses are reported in wet weight values. Dry weight values may be obtained when
percent total solids is performed at an additional cost.
Overtime Services: Time-and-a-half charges will apply for hours worked 5:00 PM to 12:00 AM Monday
through Friday and 8:00 AM through 5:00 PM on Saturday and 8:00 AM to 5:00 PM on Sunday. Triple
time will be charged for hours from 12:00 AM to 8:00 AM on Saturday and 5:00 PM to 12:00 AM on
Sunday.
Sample Collection: D-TEK does not accept any liability with regard to the collection, preservation
technique, or transportation method of samples by clients.
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D-TEK POLICIES
Fee Schedule Criteria / Discounts: Fees are established from our fixed list prices, with the exception of
non-routine analyses requiring supplemental research, method development, extensive QA/QC reporting
data, not-routine detection limits, or additional materials. Fixed prices are applied to routine analyses and
reporting formats. The prices for non-routine analyses are assessed on a "time and materials" basis.
Expedited turnaround times for sample analyses may be arranged with advanced notice. Surcharges are
applied to the prices of analyses requiring expedited turnaround times.
Discounts are extended for projects involving large numbers of .samples', or on a contractual arrangement.
Please call our office for price quotations. . ...
*• '
Turnaround Time: Standard turnaround time is five to seven '(5-7) working days for verbal results, with a
written report following within three (3) working days. .Expedited turnaround times may be arranged with
advanced notice and are subject to a surcharge. Samples received after 5:00 PM on regular working days
are considered as being received at 8:00 AM on the nexf working day and turnaround time begins at that
point.
Surcharges: Standard turnaround time (TAT) is five to seven (5-7) working days. On expedited
turnaround times the following surcharge factors apply: Three (3) day TAT (X) 1.2, Two (2) day TAT
(X) 1.5. One (1) day TAT (X) 2.0 and Same Day TAT (X) 2.5.
Holding Times: Holding times are carefully monitored at D-TEK since this is a vital part of Quality
Control procedures. D-TEK will make every effort to perform analyses within the applicable holding
times established by the Environmental Protection Agency (EPA) or equivalent methodology. We reserve
the right to apply a surcharge to prices if the sample holding time dictates sample processing within a
specified time that would otherwise not be performed within our standard turnaround time.
Payment: Payment for pre-approved accounts is net 30 days frorii the date of invoice. On all analyses that
are done on other than pre-approved accounts, payment must accompany the sample at the time of the
sample delivers' unless credit is approved by D-TEK. Cash, checks, money order or Visa / MasterCard are
acceptable forms of payment. D-TEK has a forty dollar ($40) minimum laboratory/data generation fee per
visit. Without pre-approved credit, no Analyses will begin until payment is received in full.
Sample Archiving: After thirty (30) calendar days, samples will be disposed of or returned to customer.
D-TEK will not be held responsible for reanalysis of samples after this time. Samples stored after 30
calendar days are subject to an archiving fee of $5.00 per sample per month. Samples received with
instructions to only "hold" or "store" are subject to an archiving fee commencing on the date of receipt.
However, if analytical work is performed within the thirty (30) days, the archiving fee is suspended until
another thirty (30) days have passed.
Hazardous Samples: Hazardous samples will be returned to the client. Samples that D-TEK deems as
"ha/ardous" or difficult to dispose of are subject to a disposal"fee per sample.
Reporting Results: Analyses are reported in wet weight values. Dry weight values may be obtained when
percent total solids is performed at an additional cost.
Overtime Services: Time-and-a-half charges will apply for hours worked 5:00 PM to 12:00 AM Monday-
through Friday and 8:00 AM through 5:00 PM on Saturday and 8:00 AM to 5:00 PM on Sunday. Triple
time will be charged for hours from 12:00 AM to 8:00 AM on Saturday and 5:00 PM to 12:00. AM ort .
Sunday.
Sample ..Collection; D-TEK does not accept any liability with regard to the collection, preservation ".
technique, or transportation method of samples by clients.
• Policies, 2J8/99 .