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HomeMy WebLinkAboutCT 98-17; Hadley Property; Tentative Map (CT) (56)c c ' c £ C E 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 E •C c c C 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. Ryland Homes W.O. E2758-SC File:e:\wp7\env\e2700\e2758.acr Page Two GeoSoils, Inc. 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 Ryland Homes W.O. E2758-SC File:e:\wp7\env\e2700\e2758.acr Page Three GeoSollSj Inc. 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 Ryland Homes W.O. E2758-SC File:e:\wp7\env\e2700\e2758.acr Page Four GeoSofls, Inc. 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 Ryland Homes W.O. E2758-SC File:e:\wp7\env\e2700\e2758.acr Page Five GeoSoils, Inc. 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. Ryland Homes File:e:\wp7\env\e2700\e2758.acr W.O. E2758-SC Page Six GeoSoils, Inc. 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). Ryland Homes W.O. E2758-SC Hadley Property October 8,1999 Rle:e:\wpAenv\e2700\e2758.acr Page 3 GeoSoilSj Inc. 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. Ryland Homes W.O. E2758-SC Hadley Property October 8,1999 File:e:\wp7\env\e2700\e2758.acr Page 4 GeoSoils, Inc. 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. Ryland Homes W.O. E2758-SC Hadley Property October 8,1999 File:e:\wp7\env\e2700\e2758.acr Page 5 GeoSoils, Inc. 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 Hadley Property October 8,1999 Rle:e:\wp7\env\e2700\e2758.acr Page 6 GeoSoils, Inc. 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 Ryland Homes Hadley Property File:e:\wp7\env\e2700\e2758.acr GeoSoils, Inc. W.O. E2758-SC Octobers, 1999 Page? 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 Ryland Homes Hadley Property File:e:\wp7\env\e2700\e2758.acr W.O. E2758-SC Octobers, 1999 PageS GeoSoils, Inc. 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 Hadley Property October Q, 1 999 File:e:\wp7\env\e2700\e2758.acr Page 9 GeoSoils, Inc. 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 Hadley Property October 8,1999 File:e:\wp7\env\e2700\e2758.acr Page 10 GeoSotts, Inc. 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 Hadley Property October 8,1999 File:e:\wp7\en\Ae2700\e2758.acr Page 11 GeoSoils, Inc. • 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 Hadley Property October 8,1999 File:e:\wp7\env\e2700\e2758.acr Page 12 GeoSofls, Inc. 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 ARS -I®1/. <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. 99-2737 i' *DF ARS-8@'/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 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' <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. 99-2741 *DF ARS - 10 @ '/i' *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 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. CO> ICO5mco §mq 3-im7) co> COO xm S Smco S f V SAMPLE INTEGRI-0( (X •vjU) N VM N -vl N ^1NJ-0 g -0 -0 N 8) ,N JO o) oCO O />* X J7 SAMPLE #/ SAMPLE ibESATIME6 UJ X?£ r r> co3 IJO z Ol - x »;§•<*•—»• Ka * S. O> 'C 1O JECTIOWJOITIZ — )>HZOOO 5o 5I 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. Policies, 2/8/99 y 3 I en> O Si ooo m O) v/J fl VI SAETEGRN «kKK2£S V1 ^ N >0 60 ^li r y vj (to O OQ J S,'-<f -4 -0 1 Ni -4 0 AJ X £ s? %d -C L/J ui S V£ f-I3 r m z - fV H Z O O n C)SAN DIEGO, C19 6692121FAX 619) 666-4642TOS O l^|m B, />1 > iSf'i » oi fi>(0 — <n 01 U O 3 ff 5'«> 3To D-TEK LOGS:^^ »" o O Iit 1m P § P 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 .