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HomeMy WebLinkAboutCT 98-18; Carnation Property; Tentative Map (CT) (31)E C C I - AGRICULTURAL CHEMICAL RESIDUE SURVEY | CARNATION PROPERTY, ARM 215-070-08, CITY OF CARLSBAD, SAN DIEGO COUNTY, CALIFORNIA 92009 I C E E E E FOR RYLAND HOMES I 15373 INNOVATION DRIVE, SUITE 300 SAN DIEGO, CALIFORNIA 92128 • W.O. E2759-SC OCTOBER 11, 1999 C Geotechnical • Geologic • Environmental 5741 Palmer Way • Carlsbad, California 92008 • (760)438-3155 • FAX (760) 931-0915 October 11,1999 W.O. E2759-SC Ryland Homes 15373 Innovation Drive, Suite 300 San Diego, California 92128 Attention: Mr. Jim McMenamin Subject: Agricultural Chemical Residue Survey, Carnation Property, APN 215-070-08, Establishment Number H38425, City of Carlsbad, San Diego County, California 92009 INTRODUCTION In accordance with your request and authorization, GeoSoils, Inc. (GSI) is pleased to submit the following agricultural chemical residue survey on the subject property in the City of Carlsbad. The purpose of this survey was to evaluate the 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. The overall area of the subject parcel is 10.1 acres. 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: • Based upon our field reconnaissance of the property and interviews, as well as review of readily available historical maps and photographs from 1891 to 1989, the subject property was developed for agricultural purposes from at least 1967 to the present. United States Geological Survey (USGS) topographic maps from 1891 and 1898 note no development onsite or in the site vicinity. Greenhouse activity is first visible on the subject property in 1974. • Based upon our September 20 and 21,1999 site work, the property is occupied by an abandoned flower nursery. As noted in the Phase I Environmental Site Assessment report on the site (GSI, 1998b), structures on the site consist of dilapidated greenhouses, storage and packing facilities, an office with attached poison storage room, and what appears to have been temporary living quarters. Stockpiles of materials were observed on the site, which included construction materials, demolition waste materials, agricultural waste materials, and earth materials; however, demolition waste materials (i.e., lumber, plastic sheeting, PVC piping) and agricultural waste materials (i.e., waste vegetation), previously stockpiled near the northern site entrance, have been removed. Also observed on the site were two abandoned vehicles and assorted vehicle parts, two buckets of what appeared to be waste oil, a trailer mounted spray tank, a flatbed trailer, and four (4) above-ground tanks. One of the tanks appeared to be an empty fuel tank that was placed near the south site entrance. There were no signs of surface discoloration around the tank. Stockpiled empty plastic bags of (fertilizers-dry grade) potassium nitrate, ammonium nitrate, and calcium nitrate were observed near three (3) plastic tanks that were utilized to add fertilizers to the irrigation system. In addition, containers of Dimethoate 2.67 (insecticide) and Daconil 2787 (insecticide) were observed near the irrigation tanks and in the poison storage area of the main compound. The abandoned vehicles, the waste oil buckets, and the poison storage area, located in the southeastern portion of the property, are underlain by a concrete slab. Minor, localized concrete discoloration was associated with the vehicles. Heavier concrete staining was noted near the waste oil buckets. As a part of the referenced Phase IESA (GSI, 1998b), Mr. Bruce Vandemer, CPA for the nursery operator (Mrs. Victoria Fernandez) was interviewed. In addition, Ms. Elena Castrellon, Mrs. Fernandez's daughter, was interviewed. Both parties provided information regarding the agricultural use of the property. This information included that: the property under the Fernandez ownership had always been used to grow carnations; in prior years (over four years ago), methyl bromide had been used on the plants on a regular basis. The chemicals were applied by a contractor and not stored on the property. The only chemicals stored and used regularly on the property were fertilizers (ammonium nitrate, potassium nitrate, and calcium nitrate), which are stored in the above-ground plastic tanks on the site, then applied to the plants via the site irrigation system. To the best of their knowledge, above ground or underground fuel storage tanks were never utilized on the subject property. A binder containing Material Safety Data Sheets (MSDS) was found in the abandoned office desk. The binder, compiled by Western Farm Service, Inc. provided a table of contents (dated 1995) referencing 56 separate agricultural chemicals (i.e., fertilizers, insecticides, herbicides, and fungicides). The list included (but was not limited to) Brom-O-Gas, Daconil 2787, Diazinon AG 500, Dimethoate 2.67, Dipel 2X, Dursban T/O, Orthene TT&O, Pentac WP, Roundup, Rozol, Terraclor Ryland Homes : W.O. E2759-SC File: e:\wp7\env\e2700\e2759.acr Page TWO GeoSoils, Inc. 75 WP, and Vydate L. These agricultural chemicals do not appear to be highly persistent in nature, with half-lives in soil reported to range from one (1) to one hundred (100)days (Mackey, Shiu, and Ma, 1997) and one (1) day to one hundred twenty (120) days (Oregon State University, 1996). Brom-O-Gas (i.e., Chloropicrin), Triforine EC, and Vydate L (i.e., Oxamyl) are Restricted Use Pesticide (RUP), with an EPAToxicity Classification of I (i.e., highly toxic). Diazinon is also designated as a RUP; however, it's EPA Toxicity Classification is listed as II or III (moderately to slightly toxic). General Use Pesticides (i.e., GUP) include Daconil, Dimethoate, Dithane, Dursban (i.e., Chloropyrifos), Roundup (i.e., Glyphosate), Orthene, Subdue (i.e., Metalaxyl), and Metaldehyde. GUPs are rated with an EPA Toxicity Classification II or III (Oregon State University, 1996). To evaluate the potential for restricted agricultural chemical residues onsite, surficial soil samples were collected from depths of Vz foot and 11/2 feet within the ten (10) 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 that relatively high concentrations Organophosphorous Pesticides and/or Chlorinated Herbicides were detected in the 1/2-foot samples. Sample locations are shown on the enclosed Site Map, Plate 1 . Test results for Chlorinated Pesticides and PCB's (EPA test method 8080) reported concentrations of DDT, ODD, DDE (i.e., DDT^, ), Dieldrin, Endosulfan I and II, and Toxaphene above the laboratory detection limits. No other constituents of the test suite were detected. Concentrations of DDT/DDD/DDE (i.e., DDT^^) were detected in all twenty (20) samples collected from the subject property, ranging from 0.0007 mg/kg to 0.99 mg/kg (ARS-1 @ 1/2'). For comparison purposes, regulatory action levels for hazardous waste criteria (i.e., Total Threshold Limit Concentration - TTLC) for DDTfTota,) is 1 .0 mg/kg. Concentrations of Dieldrin (0.0009 mg/kg to 0.0035 mg/kg) were detected in three (3) of the ten (10) samples collected from the 1/2-foot interval. Concentrations of Dieldrin (0.0037 mg/kg to 0.01 mg/kg) were detected in two (2) of nine (9) samples collected from the 11/2-foot interval. Regulatory action levels for hazardous waste criteria (i.e., TTLC) for Dieldrin is 8.0 mg/kg. Concentrations of Endosulfan I and II (0.0009 mg/kg to 0.009 mg/kg) were detected in five (5) of the ten (10) samples collected from the 1/2-foot interval. Endosulfan I was detected in one (1) of ten (10) samples collected from the 1- and 11/2-foot interval at a concentration of 0.0017 mg/kg. There appears to be no specific regulatory action level for hazardous waste criteria (i.e., TTLC) for Endosulfan. Ryland Homes W.O. E2759-SC File: e:\wp7\env\e2700\e2759.acr Page Three GeoSoils, Inc. Concentrations of Toxaphene (0.059 mg/kg to 0.619 mg/kg) were detected in eight (8) of the ten (10) samples collected from the 1/2-foot interval. Concentrations of Toxaphene (0.066 mg/kg to 0.361 mg/kg) were detected in five (5) of nine (9) samples collected from the 11/2-foot interval. In addition, Toxaphene was detected at a concentration of 0.313 mg/kg in a sample collected at a depth of 1 foot (due to excavation refusal on hard formation). Regulatory action levels for hazardous waste criteria (i.e., TTLC) for Toxaphene is 5.0 mg/kg. 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 and CALEPA 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 for DDT^a,), 0.0028 mg/kg for Dieldrin, 330.0 mg/kg for Endosulfan, and 0.4 mg/kg for Toxaphene. Concentrations of DDTgota!), Dieldrin, and Endosulfan 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 11/2 times lower than the PRG criteria. Detected concentrations of Dieldrin and Endosulfan onsite are at least 2Va times and over 100 times lower than the PRG criteria, respectively. Detected concentrations of Toxaphene in 95 percent of the samples collected onsite are lower than the PRG criteria. Other than the above, no detectable levels of other potentially hazardous agricultural pesticides were reported in soil samples collected within the subject property. Data collected indicate that concentrations of pesticides detected generally decrease with depth. All chemical laboratory test results are presented in Appendix B. Laboratory testing indicated no detectable concentrations from the Organophosphorous Pesticides (EPA test method 8140) suite. Laboratory analyzes found concentrations of 2,4,DB in three (3) samples (0.0089 mg/kg to 0.013 mg/kg) and Pentachlorophenol in three (3) samples (0.0016 mg/kg to 00.0061 mg/kg) tested in the Chlorinated Herbicides (EPA test method 8150) suite. The PRG level for 2,4,DB is 440.0 mg/kg and 2.5 mg/kg for Pentachlorophenol. Detected concentrations of 2,4,DB and Pentachlorophenol onsite are over 100 times lower than the PRG criteria. No other constituents of this suite of tests were detected in soil samples collected onsite. To evaluate the potential for petroleum contamination within the subject property, five (5) soil samples were collected from the driveway/traffic areas of the property. Samples collected from a depth of 0 to 1 foot were tested for Total Recoverable Petroleum Hydrocarbons-TRPH (EPA test method 418.1). Two (2) of the samples were also tested for Semi-Volatile Organic Compounds (EPA test method 8270). Detected concentrations of TRPH were reported to range from less than 10.0 mg/kg Ryland Homes W.O. E2759-SC File: e:\wp7\env\e2700\e2759.acr Page Four GeoSoils, Inc. to 12.1 mg/kg. Based upon the laboratory test results, no remedial earthwork is recommended. Except for bis (2-Ethylhexyl) phthalate detected in one sample (DS-5), there were no detectable concentrations of constituents in the Semi-Volatile Organic Compound test suite (EPA test method 8270) reported. Phthalate are plasticizers which are used to soften plastic. Bis (2-Ethylhexyl) phthalate is often associated with plastic sampling equipment and/or plastic containers, and is commonly a laboratory contaminant. Review of laboratory test results as a whole do not suggest any other related contaminants. It is GSI's opinion, therefore, that since Phthalates are not typical working chemicals in the flower nursery industry, and since this sample was collected outside the working area of the flower nursery (i.e., near the southwestern site boundary with a public street), the sample concentration is not representative of onsite conditions. Sample locations are shown on the enclosed Site Map, Plate 1. • Laboratory testing for Total Lead (EPA test method 6010) was also completed. Two (2) samples from the driveway/traffic areas and seven (7) samples from within the greenhouses were analyzed. Concentrations were reported to range from 19.6 mg/kg to 33.9 mg/kg. The TTLC level for Lead is 1,000 mg/kg. The PRG criteria for Lead (Cal-Modified PRG) is 130 mg/kg. Based upon the test data, no remedial earthwork is recommended. • The regulatory action levels for hazardous waste criteria (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 equal to the PRG levels for all constituents, with the majority at least 4 times below the 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 this evaluation. Based upon comparison of regulatory site screening values (i.e., Preliminary Remedial Goals), it appears that remedial measures are required to mitigate certain residue concentrations of DDT^,) and 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 groundwater was not encountered within 25 feet of the pre- Ryland Homes W.O. E2759-SC File: e:\wp7\env\e2700\e2759.acr Page Five GeoSoils, Inc. 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. 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 (i.e., greater than 50 feet), the likelihood is low that pesticide residues detected in the upper 1 1/2 feet of earth materials within the subject site have affected groundwater. Based upon the scope of work completed, GSI concludes that the concentrations of the majority of potentially hazardous agricultural chemicals 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 the majority of reported concentrations, remedial earthwork is not recommended or required. Remedial earthwork is recommended, however, to mitigate two (2), one-acre grid areas with reported concentrations of DDT^,^, and Toxaphene above Preliminary Remedial Goals (PRGs), which potentially represent a risk to human health. GSI's recommendation for burial of affected 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 DDTf,^ and Toxaphene greater than the Preliminary Remedial Goal criteria should not be placed within ten (10) feet of finish pad grade(s) within 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 perched groundwater. Affected soils should be buried within the property boundary only, and placed so as not to adversely affect surface water. Based upon existing test data, remedial measures are needed to locally mitigate some residue concentrations of DDT^^ and Toxaphene detected within the property. Based upon existing data, GSI estimates that the upper one (1) foot of soils from two (2) one-acre grids (i.e., two acres) onsite should require remediation. Specifically, remedial earthwork is recommended in the area covering all or a portion of Lots 14 through 23 (See Plate 1). The estimated quantity of soils requiring remediation is on the order of 3,225 cubic yards (yds3). Remediation measures may include excavation and stockpile for use as backfill in paved street areas at a depth of at least five (5) feet, or excavation and disposal offsite. GSI recommends that this office, or other licenced environmental professional consultant, observed the remedial earthwork within the property boundary. Ryland Homes W.O. E2759-SC File: e:\wp7\env\e2700\e2759.acr Page Six GeoSotts, Inc. • Review of the Site Map (Plate 1) indicates that there are 54,000 ± square feet of paved street proposed within "A," "B," and "C" Streets. Considering a burial depth of at least five (5) feet, the depth of remedial earthwork is estimated to be on the order of seven (7) feet below finish grade. Calculations indicate that there is sufficient area within the site boundary to bury all affected soil within asphalt-paved streets. • Due to the large amount of structures and associated debris from dilapidated greenhouses scattered within the property, pre-demolition and demolition operations should be monitored by a representative of this office. Storage containers with petroleum products and agricultural chemicals should be removed from the site and disposed of following regulatory guidelines. • Removals and burial should be monitored by a representative of this office. Sampling should be conducted at a minimum of two (2) 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 are provided above and in the Recommendations section of this report. If detectable concentrations of restricted pesticides are encountered above the PRG criteria, additional removal would occur until earth materials with concentrations lower than PRG criteria are encountered. • Removal of the concrete slabs in the handling and storage compound areas should also be observed by a representative of this office, to evaluate if petroleum staining detected on the surface has leeched through to the subgrade. Dependant upon actual field conditions, sampling may be conducted after removal of the concrete to evaluate discoloration (if any) that may affect the underlying earth materials. Stained concrete should be property disposed of offsite, following proper disposal guidelines. • 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. Ryland Homes W.O. E2759-SC File: e:\wp7\env\e2700\e2759.acr Page Seven GeoSoils, Inc. 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 David W. Skelly Civil Engineer, RCE )hn P. Franklin lanager, REA-1 1675, CEG 1341 EPL/DWS/JPF/mo Distribution: (3) Addressee (1) Department of EnvironrrrentaflHealth, Attention: Mr. Nasser Sionit, Ph.D. Ryland Homes File: e:\wp7\env\e2700\e2759.acr W.O. E2759-SC Page Eight 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 4 Hydrogeology 4 Summary of Discussions With Persons Familiar With Site 4 Material Safety Data Sheets 5 SCOPE OF WORK - AGRICULTURAL CHEMICAL RESIDUE SURVEY 6 Preliminary Chemical Test Results 7 CONCLUSIONS AND RECOMMENDATIONS 12 Conclusions 12 Recommendations 15 LIMITATIONS 17 FIGURES: Figure 1 - Site Location Map 2 ATTACHMENTS: Appendix A - References Rear of Text Appendix B - Laboratory Data Rear of Text Plate 1 - Sample Location Map Rear of Text in Pocket GeoSoils, Inc. AGRICULTURAL CHEMICAL RESIDUE SURVEY CARNATION PROPERTY, APN 215-070-08, ESIABL/SHMENT NUMBER H38425 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"r2000' sS»4lf£«*^ Base Map: The Thomas Guide, San Diego County Street Guide and Directory, 1998 Edition, by Thomas Bros. Maps, page 1127, 1"=1/2 mile R«produo«d with permission granted by thoma* Bros. Map*.Thia map la eopyrlghtotf by Thomaa Broa. Miipa. H ta unlawfulto copy or raproduc* aM or any part thereof, wtwttwr Wparaonal uaa or raaato, without parmiaaion. AM rlghta raaarved.W.O. E2759-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 10-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 eastern property boundary, is recently improved. A chain-link fence surrounds the property, with two (2) entrances along the eastern edge. The property is currently occupied by an abandoned flower nursery. As noted in the Phase I Environmental Site Assessment report on the site (GSI, 1998b), structures on the site consist of dilapidated greenhouses, storage and packing facilities, an office with attached poison storage room, and what appear to have been temporary living quarters. Stockpiles of materials were observed on the site, which included construction materials, demolition waste materials, agricultural waste materials, and earth materials; however, demolition waste materials (i.e., lumber, plastic sheeting, PVC piping) and agricultural waste materials (i.e., waste vegetation), previously stockpiled near the northern site entrance, have been removed. Also observed on the site were two (2) abandoned vehicles and assorted vehicle parts, two (2) buckets of what appeared to be waste oil, a trailer mounted spray tank, a flatbed trailer, and four (4) above-ground tanks. One of the tanks (an empty fuel tank ?), appeared to have been placed near the south site entrance. There were no signs of surface discoloration around the tank, and there were no obvious signs holes. Stockpiled empty plastic bags of (fertilizers-dry grade) potassium nitrate, ammonium nitrate, and calcium nitrate were observed near three (3) plastic tanks that appeared to be used to add fertilizers to the irrigation system. In addition, empty containers of Dimethoate 2.67 (insecticide) were observed near the irrigation tanks in the northerly area of the main compound. Containers of Daconil 2787 (insecticide) were observed within the poison storage area of the main compound building. The abandoned vehicles, the waste oil buckets, and the poison storage area, located in the southeastern portion of the property, are underlain by a concrete slab. Minor, localized concrete discoloration was associated with the vehicles. Heavier concrete staining was noted near the waste oil buckets. Ryland Homes W.O. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 3GeoSoils, Inc. Proposed Development Based upon the tentative tract map (by Hunsaker & Associates, Inc.) of the Carnation Property, the proposed development consists of thirty two(32) single-family residential lots and interior roadways "A," "B," and "C" 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. Hvdrogeology 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 westerly direction. 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 As a part of the previous Phase I ESA (GSI, 1998b), Mr. Bruce Vandemer (CPA for the nursery operator, Mrs. Victoria Fernandez) was interviewed by telephone. Mr. Vandemer indicated that Mrs. Fernandez had owned the property since 1979. The property under the Fernandez ownership had always been used for agricultural purposes to grow flowers; and, to the best of his knowledge, the property had only been used for agricultural purposes prior to the Fernandez ownership. Mr. Vandemer was not aware of the agricultural chemicals that were used on the site, but did know that above-ground storage tanks existed on the site and that one had recently been relocated on the site. Mr. Vandemer stated that Mrs. Fernandez was not available for interview, but her daughter could be contacted. Ryland Homes W.O. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 4 GeoSoils, Inc. Ms. Elena Castrellon, Mrs. Fernandez's daughter, was also previously interviewed (GSI, 1998b). Ms. Castrellon confirmed that the property has always been used under her family's ownership for the growth of carnation flowers. She stated that in prior years (over four years ago), methyl bromide had been used on the plants. A contractor was hired periodically (about every four to five years) to spray the plants. Mrs. Castrellon indicated that the methyl bromide was never stored on the property - the contractor brought the chemicals onto the property at the time of application. Mrs. Castrellon noted that the only chemicals stored and used regularly on the property were fertilizers (ammonium nitrate, potassium nitrate, and calcium nitrate). These chemicals are stored in the above-ground storage tanks on the site, then applied to the plants via the site sprinkler system. Material Safety Data Sheets A binder containing Material Safety Data Sheets (MSDS) was found in the office of the nursery. The binder, compiled by Western Farm Service, Inc. provided a table of contents (dated 1995) for 56 separate agricultural chemicals (i.e., fertilizers, insecticides, herbicides, and fungicides). The list included (but was not limited to) Brom-O-Gas, Daconil 2787, Diazinon AG 500, Dimethoate 2.67, Dipel 2X, Dursban T/O, Orthene TT&O, Pentac WP, Roundup, Rozol, Terraclor 75 WP, and Vydate L. These agricultural chemicals do not appear to be highly persistent in nature, with half-lives in soil reported to range from one (1) to one hundred (100) days (Mackey, Shiu, and Ma, 1997). 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 listed in the binder 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). Brom- O-Gas (i.e., Chloropicrin), Triforine EC, and Vydate L (i.e., Oxamyl) are Restricted Use Pesticide (RUP), with an EPA Toxicity Classification of I (i.e., highly toxic). Diazinon is also designated as a RUP; however, it's EPA Toxicity Classification is listed as II or III (moderately to slightly toxic). General Use Pesticides (i.e., GUP) include Daconil, Dimethoate, Dithane, Dursban (i.e., Chloropyrifos), Roundup (i.e., Glyphosate), Orthene, Subdue (i.e., Metalaxyl), and Metaldehyde. GUPs are rated with EPA Toxicity Classification II or III (Oregon State University, 1996). The reported Half-Life of these chemicals, which are listed slighlty to moderately persistent in nature, range from one (1) day to one hundred twenty (120) days (Oregon State University, 1996). Ryland Homes W.O. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 5 GeoSoils, Inc. SCOPE OF WORK - AGRICULTURAL CHEMICAL RESIDUE SURVEY The restricted agricultural chemical residue survey consisted of twenty (20) soil samples collected from existing earth materials onsite. Due to the recently active nature of agricultural activities onsite, as well as the existence of chemical storage areas and abandoned equipment, five (5) additional soil samples were collected from vehicle passage areas (i.e., driveways) within the main compound and within the most recently active greenhouses. It should be noted that the poison storage area and equipment repair/storage areas are underlain by a concrete slab; therefore, samples were not collected directly from these areas. Overall, 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 Vz foot and 11/2 feet at a random location within each grid. Soils samples from vehicle passage ways within the compound and greenhouses were collected at a depth of 0 to 1 foot. Holes were excavated using a small diameter, stainless steel hand auger. Samples were collected by a licenced geologist on September 20 and 21, 1999, properly stored and transported to a California Department of Health Services (DHS) certified laboratory the same day, following proper procedures. A Chain-of-Custody record was recorded within the laboratory. 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. • Soil samples tested for Total Recoverable Petroleum Hydrocarbons, utilizing EPA test method 418.1. • Soil samples tested for Total Lead compounds utilizing EPA test method 6010. • Soil samples tested for Semi-Volatile Organic Compounds utilizing EPA test method 8270. Based upon our experience with similar farmlands in Carlsbad, 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, Dieldrin, 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. Ryland Homes W.O. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 6 GeoSoils, Inc. Initially, GSI requested the chemical laboratory to test all samples collected from the 1/2-foot interval individually for the three agricultural chemical suites of tests presented above (i.e., EPA 8080, 81 40, & 81 50). Samples collected from the 1 1/2-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 1/2-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. Testing of select samples collected from the equipment passage areas consisted of Total Recoverable Petroleum Hydrocarbons (TRPH), Total Lead compounds, and Semi-Volatile Organic Compounds. Select samples collected from within the greenhouses were also tested for Total Lead. 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 1 to 11/2 feet, medium dense to dense and well cemented terrace deposits were encountered in the sample test excavations onsite. 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. Preliminary Chemical Test Results Based upon the laboratory test results, concentrations of DDT/DDD/DDE (i.e., DDT^^) were detected in all twenty (20) samples collected from the subject property, ranging from 0.0007 milligrams per kilogram (mg/kg) to 0.99 mg/kg. For comparison purposes, regulatory action levels for hazardous waste criteria (i.e., TTLC) for DDT^^ is 1 .0 mg/kg. Concentrations of Toxaphene (0.059 mg/kg to 0.619 mg/kg) were detected in eight (8) of the ten (10) samples collected from the 1/2-foot interval. Concentrations of Toxaphene (0.066 mg/kg to 0.361 mg/kg) were detected in five (5) of the nine (9) samples collected from the 1 1/2-foot interval. In addition, Toxaphene was detected at a concentration of 0.31 3 mg/kg in a sample collected at a depth of 1 foot, due to excavation refusal on hard sandstone formation. Regulatory action levels for hazardous waste criteria (i.e., TTLC) for Toxaphene is 5.0 mg/kg. Concentrations of Dieldrin (0.0009 mg/kg to 0.0035 mg/kg) were detected in three (3) of the ten (1 0) samples collected from the 1/2-foot interval. Concentrations of Dieldrin (0.0037 mg/kg to 0.01 mg/kg) were detected in two (2) of the ten (10) samples collected from the 1 to 11/2-foot interval. Regulatory action levels for hazardous waste criteria (i.e., TTLC) for Dieldrin is 8.0 mg/kg. Ryland Homes W.O. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 7 GeoSoils, Inc. Concentrations of Endosulfan I and II (0.0009 mg/kg to 0.009 mg/kg) were detected in five (5) of the ten (10) samples collected from the 1/2-foot interval. Endosulfan I was detected in one (1) often (10) samples collected from the 1 and 11/2-foot interval at a concentration of 0.0017 mg/kg. There appears to be no specific regulatory action level for hazardous waste criteria (i.e., TTLC) for Endosulfan. 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 @ Vi' ARS-1 @1V2' ARS-2 @ 1/2' ARS-2@11/2' ARS-3 @ Vi' ARS-3@1' ARS-4 @ 1/2' ARS-4@1V2' ARS-5 @ V* ARS-5@11/2' ARS-6 @ 1/2' ARS-6@1</2' ARS-7 @ y2' ARS-7@1V2' ARS-8 @ V* ARS-8 @ 1 Vi ARS-9 @ 1/2' ARS-9@1'/2' ARS-1 0@'/2' TOXAPHENE(iti»*g5 0.619 0.188 0.361 0.361 0.163 0.313 0.168 0.117 0.201 <DL <DL <DL 0.059 0.066 0.208 <DL 0.233 0.185 <DL PRO"*(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 0.40 0.40 0.40 0.40 fr8?Il) (mg/fcg) 0.99 0.122 0.275 0.234 0.11 0.174 0.115 0.099 0.216 0.0061 0.0048 0.00081 0.12 0.054 0.213 0.0058 0.166 0.193 0.0038 &9*9) 1.7/2.4 1.7/2.4 1.7/2.4 1 .7/2.4 1 .7/2.4 1 .7/2.4 1.7/2.4 1.7/2.4 1.7/2.4 1.7/2.4 1.7/2.4 1 .7/2.4 1.7/2.4 1 .7/2.4 1.7/2.4 1 .7/2.4 1.7/2.4 1.7/2.4 1.7/2.4 £NWAN (ing/kg) 0.0014 <DL 0.0013 0.0017 <DL <DL <DL <DL <DL <DL <DL <DL 0.0048 <DL 0.0011 & 0.009 <DL 0.0009 & 0.0087 <DL <DL Pfl<3«> (mg/kg) 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 330.0 DIELDRIN (mg/kg* <DL <DL <DL <DL <DL <DL 0.0035 0.0037 0.0047 <DL <DL <DL <DL <DL <DL <DL 0.0009 0.01 <DL PR6<*> (mg/Kfl) 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 0.028 Ryland Homes Carnation Property File: e:\wp7\env\e2700\e2759.acr GeoSoils, Inc. W.O. E2759-SC October 11,1999 Page8 SAMPLE LOCATION ARS-10@11/2' TOXAPHENE(mg/kgj <DL PRG «> (ing/Kg) 0.40 (r8?AL) {mg/kg) 0.0007 bRQW (mg/kg) 1 .7/2.4 "WBM"1 (mg/kg) <DL PRG (q) (mg/kg) 330.0 DIELDRIN (mg/kg) <DL PRO w (mg/ttg) 0.028 PRG(1) - Preliminary Remedial Goals - Toxaphene (Smucker, 1998) PRG (2) - Preliminary Remedial Goals - DDT/DDE/DDD (Smucker, 1998) PRG (3) - Preliminary Remedial Goals - Endosulfan (Smucker, 1998) PRG (4) - Preliminary Remedial Goals - Dieldrin (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). 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 SAMPLE LOCATION ARS-1 @ Vz' ARS-2 @ Vz' ARS-3 @ Vz ARS-4 @ Vz ARS-5 @ Vz ARS-6 @ Vz ARS-7 @ Vz ARS-8 @ Vz ARS-9 @ Vz ARS-1 0@Vz ORGANOPHOSPHORUS PESTICIDES (mg/kg) <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL - Less Than Laboratory Detection Limits Laboratory analyzes reported concentrations of 2.4.DB in three (3) samples (0.0089 mg/kg to 0.013 mg/kg) and Pentachlorophenol in three (3) samples (0.0016 mg/kg to 00.0061 mg/kg) tested in the Chlorinated Herbicides (EPA test method 8150) suite. The PRG level for 2,4,DB is 440.0 mg/kg and 2.5 mg/kg for Pentachlorophenol. Detected concentrations Ryland Homes Carnation Property File: e:\wp7\env\e2700\e2759.acr W.O. E2759-SC October 11,1999 Page 9 GeoSoils, Inc. of 2,4,DB and Pentachlorophenol onsite are over 100 times lower than the PRG criteria. No other constituents of this suite of test were detected in soil samples collected onsite. A summary of test results are provided in Table 3 below. Test results are provided in Appendix B. Of the ten (10) samples collected from the 1/2-foot interval, seven (7) samples from within the greenhouses were analyzed for Total Lead (EPA test method 6010). Concentrations were reported to range from 19.6 mg/kg to 33.9 mg/kg. For comparison purposes, the TTLC level for Lead is 1,000 mg/kg. The PRG level for Lead (Cal-Modified PRG) is 130 mg/kg. TABLE 3 SUMMARY OF CHEMICAL TEST RESULTS EPA TEST METHODS 8150 and TOTAL LEAD SAMPLE LOCATION ARS-1 @ Vz' ARS-2 @ Vz' ARS-3 @ Vz ARS-4 @ 1/2' ARS-5 @ Vz ARS-6 @ Vz' ARS-7 @ Vz ARS-8 @ Vz ARS-9 @ Vz ARS-1 0@Vz P6NTACHUORGPH6NOL (rng/kg) 0.0016 0.0061 <DL 0.002 <DL <DL <DL <DL <DL <DL PRG »> (mg/kg) 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2.5 2,4, DB {mg/kg) <DL 0.013 <DL 0.0095 0.0089 <DL <DL <DL <DL <DL PRQP) (mg/kg) 440.0 440.0 440.0 440.0 440.0 440.0 440.0 440.0 440.0 440.0 TOTAL LEAD (mg/kg) 26.0 25.7 NT'3' NT 19.6 24.7 31.5 33.3 NT 33.9 PRG(1) - Preliminary Remedial Goals - Pentachlorophenol (Smucker, 1998) PRG (2) - Preliminary Remedial Goals - 2,4, DB (Smucker, 1998) <DL - Less Than Laboratory Detection Limits NT(3)-Not Tested To evaluate the potential for petroleum contamination within the subject property, five (5) soil samples were collected from the driveway/traffic areas of the property. Samples, collected from a depth of 0 to 1 foot were tested for Total Recoverable Petroleum Hydrocarbons-TRPH (EPA test method 418.1). Two (2) of the samples were also tested for Semi-Volatile Organic Compounds (EPA test method 8270). Ryland Homes Carnation Property File: e:\wp7\env\e2700\e2759.acr W.O. E2759-SC October 11,1999 Page 10 GeoSoils, Inc. Detected concentrations of TRPH were reported to range from less than 10.0 mg/kg to 12.1 mg/kg. Based upon the laboratory test results, no remedial earthwork is needed. Except for bis (2-Ethylhexyl) phthalate, detected in one sample, there were no detectable concentrations of Semi-Volatile Organic Compounds reported. It is our understanding that phthalates are a fairly common laboratory contaminant. Phthalates are typically used as a plasticizer, which is not characteristic of flower operations. It is GSI's opinion that since this sample was collected outside the working area of the flower nursery and located near the southwestern site boundary with a public street, the sample concentrations is not representative of onsite conditions. Sample locations are shown on the enclosed Site Map, Plate 1. Laboratory testing for Total Lead (EPA test method 6010) was also completed. Two (2) samples from the driveway/traffic areas were analyzed. Concentrations were reported to be 27.0 mg/kg and 30.0 mg/kg. The TTLC level for Lead is 1,000 mg/kg. The PRG level for Lead (Cal-Modified PRG) is 130 mg/kg. A summary of test results are provided in Table 4 below. Test results are provided in Appendix B. TABLE 4 SUMMARY OF CHEMICAL TEST RESULTS EPA TEST METHOD 8270. TRPH. and TOTAL LEAD SAMPLE LOCATION DS-1 @ 1/2' DS-2 @ 1/2' DS-3 @ Vz DS-4 @ 1/2' DS-5 @ Vz' EPA TEST METHOD 8270 (mg/kg} NT(2) NT(2) <DL'1' NT(2) <DL TRPH {mg/kg) <10.0 10.0 12.1 <10.0 <10.0 TOTAL LEAD {mg/kg} NT<2' NT"2' 27.0 NT(2) 30.0 <DL - Less Than Laboratory Detection Limits <DL(1) - Except bis (2-Ethylhexyl) phthalate at a concentration of 225.0 mg/kg NT(2)-Not Tested By rule of thumb, if the 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 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 Ryland Homes Carnation Property File: e:\wp7\env\e2700\e2759.acr W.O. E2759-SC October 11,1999 Page 11 GeoSoils, Inc. 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^), Dieldrin, Endosulfan 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 and CALEPA 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: • Test results for Chlorinated Pesticides and PCB's (EPA test method 8080) reported concentrations of DDT, ODD, DDE (i.e., DDT^^), Dieldrin, Endosulfan I and II, and Toxaphene above the laboratory detection limits. No other constituents of the test suite were detected. Concentrations of DDT/DDD/DDE (i.e., DDT^^) were detected in all twenty (20) samples collected from the subject property, ranging from 0.0007 mg/kg to 0.99 mg/kg (ARS-1 @ Vfe'). For comparison purposes, regulatory action levels for hazardous waste criteria (i.e., TTLC) for DDT^^is 1.0 mg/kg. Concentrations of Dieldrin (0.0009 mg/kg to 0.0035 mg/kg) were detected in three (3) of the ten (10) samples collected from the 1/2-foot interval. Concentrations of Dieldrin (0.0037 mg/kg to 0.01 mg/kg) were detected in two (2) of nine (9) samples collected from the 11/2-foot interval. Regulatory action levels for hazardous waste criteria (i.e., TTLC) for Dieldrin is 8.0 mg/kg. Concentrations of Endosulfan I and II (0.0009 mg/kg to 0.009 mg/kg) were detected in five (5) of the ten (10) samples collected from the 1/2-foot interval. Endosulfan I was detected in one (1) of ten (10) samples collected from the 1 and 11/2-foot Ryland Homes W.O. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 12 GeoSoils, Inc. interval at a concentration of 0.0017 mg/kg. There appears to be no specific regulatory action level for hazardous waste criteria (i.e., TTLC of Toxaphene (0.059 mg/kg to 0.619 mg/kg) were detected in eight (8) of the ten (10) samples collected from the 1/2-foot interval. Concentrations of Toxaphene (0.066 mg/kg to 0.361 mg/kg) were detected in five (5) of nine (9) samples collected from the 11/2-foot interval. In addition, Toxaphene was detected at a concentration of 0.313 mg/kg in a sample collected at a depth of 1 foot (due to excavation refusal on hard formation). Regulatory action levels for hazardous waste criteria (i.e., TTLC) for Toxaphene is 5.0 mg/kg. • 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 and CALEPA 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 for DDT^^, 0.0028 mg/kg for Dieldrin, 330.0 mg/kg for Endosulfan, and 0.4 mg/kg for Toxaphene. Concentrations of DDTp-ota,), Dieldrin, and Endosulfan 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 Vk times lower than the PRG criteria. Detected concentrations of Dieldrin and Endosulfan onsite are at least 21/2 times and over 100 times lower than the PRG criteria, respectively. Detected concentrations of Toxaphene in 95 percent of the samples collected onsite are lower than the PRG criteria. Other than the above, no detectable levels of other potentially hazardous agricultural pesticides were reported in soil samples collected within the subject property. Data collected indicate that concentrations of pesticides detected generally decrease with depth. All chemical laboratory test results are presented in Appendix B. • Laboratory testing indicated no detectable concentrations from the Organophosphorous Pesticides (EPA test method 8140) suite. • Laboratory analyzes found concentrations of 2,4,DB in three (3) samples (0.0089 mg/kg to 0.013 mg/kg) and Pentachlorophenol in three (3) samples (0.0016 mg/kg to 00.0061 mg/kg) tested in the Chlorinated Herbicides (EPA test method 8150) suite. The PRG level for 2,4,DB is 440.0 mg/kg and 2.5 mg/kg for Pentachlorophenol. Detected concentrations of 2,4,DB and Pentachlorophenol onsite are over 100 times lower than the PRG criteria. No other constituents of this suite of test were detected in soil samples collected onsite. • To evaluate the potential for petroleum contamination within the subject property, five (5) soil samples were collected from the driveway/traffic areas of the property. Samples, collected from a depth of 0 to 1 foot were tested for Total Recoverable Petroleum Hydrocarbons-TRPH (EPA test method 418.1). Two (2) of the samples Ryland Homes W.O. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 13 GeoSoils, Inc. were also tested for Semi-Volatile Organic Compounds (EPA test method 8270). Detected concentrations of TRPH were reported to range from less than 1 0.0 mg/kg to 12.1 mg/kg. Based upon the laboratory test results, no remedial earthwork is recommended. Except for bis (2-Ethylhexyl) phthalate detected in one sample (DS-5), there were no detectable concentrations of constituents in the Semi-Volatile Organic Compound test suite (EPA test method 8270) reported. Phthalate are plasticizers which are used to soften plastic. Bis (2-Ethylhexyl) phthalate is often associated with plastic sampling equipment and/or plastic containers, and is commonly a laboratory contaminant. Review of laboratory test results as a whole do not suggest any other related contaminants. It is GSI's opinion, therefore, that since Phthalates are not typical working chemicals in the flower nursery industry, and since this sample was collected outside the working area of the flower nursery (i.e., near the southwestern site boundary with a public street), the sample concentration is not representative of onsite conditions. Sample locations are shown on the enclosed Site Map, Plate 1 . • Laboratory testing for Total Lead (EPA test method 601 0) was also completed. Two (2) samples from the driveway/traffic areas and seven (7) samples from within the greenhouses were analyzed. Concentrations were reported to range from 19.6 mg/kg to 33.9 mg/kg. The TTLC level for Lead is 1 ,000 mg/kg. The PRG criteria for Lead (Cal-Modified PRG) is 130 mg/kg. Based on the test data, no remedial earthwork is recommended. • The regulatory action levels for hazardous waste criteria (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 equal to the PRG levels for all constituents, with the majority at least 4 times below the 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 this evaluation. Based upon comparison of regulatory site screening values (i.e., Preliminary Remedial Goals), it appears that remedial measures are required to mitigate certain residue concentrations of DDT^,^ and 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. Ryland Homes W.O. E2759-SC Carnation Property October 1 1 , 1 999 File: e:\wp7\env\e2700\e2759.acr Page 14 GeoSoils, Inc. 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. • 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 (i.e., greater than 50 feet), the likelihood is low that pesticide residues detected in the upper 1 Vz 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 the majority of potentially hazardous agricultural chemicals 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 the majority of reported concentrations, remedial earthwork is not recommended or required. Remedial earthwork is recommended, however, to mitigate two (2), one-acre grid areas with reported concentrations of DDT^^ and Toxaphene above Preliminary Remedial Goals (PRGs), which potentially represent a risk to human health. GSI's recommendation for burial of affected soils are to significantly limit the overall impact chemical residues of the buried soils have on surface waters, ground water(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 DDT^^ and Toxaphene greater than the Preliminary Remedial Goal criteria should not be placed within ten (10) feet of finish pad grade(s) within 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 perched groundwater. Affected soils should be buried within the property boundary only, and placed so as not to adversely affect surface water. • Based upon existing test data, remedial measures are needed to locally mitigate some residue concentrations of DDT^^ and Toxaphene detected within the property. Based upon existing data, GSI estimates that the upper one (1) foot of soils from two (2) one-acre grids (i.e., two acres) onsite should require remediation. Specifically, remedial earthwork is recommended in the area covering all of or a portion of Lots 14 through 23 (see Plate 1). The estimated quantity of soils requiring remediation is on the order of 3,225 cubic yards (yds3). Remediation measures may Ryland Homes W.O. E2759-SC Carnation Property October 1 1 , 1 999 File: e:\wp7\env\e2700\e2759.acr Page 1 5 GeoSoils, Inc. include, but not limited to excavation and stockpile for use as backfill in paved street areas at a depth of at least five (5) feet, or excavation and stockpile for use as fill materials in building areas or open space areas at a depth of at least ten (10) feet, which may require over-excavation to generate disposal areas; and, excavation and disposal offsite. GSI recommends that this office, or another licensed environmental professional consultant, observed the remedial earthwork within the property boundary. Review of the Site Map (Plate 1) indicates that there are 54,000 ± square feet of paved street proposed within "A," "B," and "C" Streets. Considering a burial depth of at least five (5) feet, the depth of remedial earthwork is estimated to be on the order of seven (7) feet below finish grade. Calculations indicate that there is sufficient area within the site boundary to bury all affected soil within asphalt-paved streets. Due to the large amount of structures and associated debris from dilapidated greenhouses scattered within the property, pre-demolition and demolition operations should be monitored by a representative of this office. Storage containers with petroleum products and agricultural chemicals should be removed from the site and disposed of following regulatory guidelines. Removals and burial should be monitored by a representative of this office. Sampling should be conducted at a minimum of two (2) 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 are provided above and in the Recommendations section of this report. If detectable concentrations of restricted pesticides are encountered above the PRG criteria, additional removal would occur until earth materials with concentrations lower than the PRG criteria are encountered. Removal of the concrete slabs in the handling and storage compound areas should also be observed by a representative of this office, to evaluate if petroleum staining detected on the surface has leeched through to the subgrade. Dependant upon actual field conditions, sampling may be conducted after removal of the concrete to evaluate discoloration (if any) that may affect the underlying earth materials. Stained concrete should be property disposed of offsite, following proper disposal guidelines. 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. Ryland Homes W.O. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 16 GeoSoils, Inc. 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. E2759-SC Carnation Property October 11,1999 File: e:\wp7\env\e2700\e2759.acr Page 17 GeoSoils, Inc. E E E § vV .•' ,': >':"•.•• ; E . . .';/ ' ^: .. . APPENDIX A REFERENCES I i E E c 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 Septembers (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, Carnation Property, City of Carlsbad, California, W.O. E2759-SC, dated September 28. GeoSoils, lnc.,1998a, Preliminary Geotechnical Investigation, 10-Acre "Carnation/Fernandez" Property, City of Carlsbad, California, W.O. 2588-A-SC, dated December 3. , 1998b, Phase I Environmental Site Assessment, Carnation/Ferandez Property, City of Carlsbad, San Diego County, California 92009, W.O. E2588-SC, by GeoSoils, Inc., dated December 8. 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. i 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, 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. E r c I - APPENDIX B LABORATORY DATA I I C C c c c c 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: 9/27 and 10/5 and 8/99 Sampling Date: 9/21/99 Date Sample Received: 9/21/99 Date Extracted: 9/22 and 23/99 Date Analyzed: September 23,28 and October 4 and 6,1999 Analyzed By: EA Sample Type: Soil Project Name: E2759-SC Log Number: 99-2764 to 99-2783 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 Aticnza Operations Manager D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 SAN DIEGO, CA 92121 (858) 566-4540, FAX (858) 566-4542 CHAIN OF CUSTODY D-TEK LOG #: PAGE TO #: OF CUSTOMER INFORMATION PROJECT INFORMATION ANALYSIS REQUEST COMPANY:CONTACT PERSON: PROJECT MANAGER. U>Viyf PROJECT BILLING INFORMATION BILL TO: ^ *""' ADDRESS: D-TEK LOG*SAMPLE #7 SAMPLE IDENTIFICATION SAMPLE SAMPLE; TIME ':\- SAMPLE MATRIX CONTAIN # OF C O N T A 1 N E R S /O en \,X QQ- ,N V \ V V N-V \v Vv V \ V*.\ IVJVi \ -Ucr SAMPLE INTEGRITY MEETS HOLDING TIME?Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N CORRECT CONTAINERS ?Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N . RELINQUISHED BY:2. RELINQUISHED BY;3. RELINQUISHED BY;SAMPLfe RECEIPT SPECIAL INJStRUCtlORS DATE AND TIME:'DATE AND TIME:RECEIVED IN ICE? YES/NO SIGNATURE: ^ SIGNATURE:SIGNATURE:TAPE SEAL INTACT Y/N NA PRINTED NAME:Vj y . , ,PRINTED NAME:PRINTED NAME:PRESERVATIVE YES/NO NA . RECEiVEO BY;2. RECEIVED BY:3; RECEIVED :BY:PRECAUTIONS: DATE AND T^DATE AND TIME:DATE AND TIME: SIGNATURE:SIGNATURE: PRINTED NAMEM XT .PRINTED NAME:PRINTED NAME:| (A KM 5c\V*> - ALL SAMPLES ARE SUBJECT TO TERMS AND CONDITIONS ON REVERSE SIDE - Chain of Custody Form.xU 2/8/9S II 11 II II Illlfl II IJ II 11 tl IJ li IJ II llfl II D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 SAN DIEGO, CA 92121 (858) 566-4540, FAX (858) 566-1542 CHAIN OF CUSTODY DATE: D-TEK LOG #: PAGE TO #: J&^\_OF <J^±. CUSTOMER INFORMATION PROJECT INFORMATION :' ANALYSIS: REiUESti:: CONTACT PERSON: e. PROJECT MANAGER:BILLING INFORMATION ** ADDRESS: D-TEK LOG #SAMPLE # 1 SAMPLE IDENTIFICAflON SAMPLE SAMPLE TIME ; SAMPLE CONTAIN # OF C O N T A cP oe r ) VJ-zl v-v X xr X V ; \ SAMPLE INTEGRITY MEETS HOLDING TIME 7 Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N CORRECT CONTAINERS ?Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N . RELINQUISHED BY:fc RELlNQtilSHea BY:RELiN<5UlSHEO BV:SAMPLE ^RECEIPT DATE AND TIM DATE AND TIME:'DATE AND TIME:RECEIVED IN ICE? YES/NO SIGNATURE:SIGNATURE:SIGNATURE:TAPE SEAL INTACT Y/N NA PRINTED NAME:PRINTED NAME:PRINTED NAME:PRESERVATIVE YES/NO NA . RECEIVED BY:2. RECEIVED BY:3, RECEIVED BY:PRECAUTIONS: DATE ANDTIM5:- 5\'C( C\^ \DATE AND TIME:DATE AND TIME: SIGNATURE:SIGNATURE: RINTED NAM PRINTED NAME:PRINTED NAME: \- ALL SAMPLES ARE SUBJECT TO TERMS AND CONDITIONS ON REVERSE SIDE- Chain of Custody Form.xls 2/M* II 11 II II I I I I I I II II II II II 1J llll If tl fl |1 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: Date Analyzed: Analyzed By: Sample Type: Project Name: Log Number: 10/5/99 9/21/99 9/21/99 October 4,1999 EA Soil E2759-SC 99-2764,99-2766,99-2772,99-2774, 99-2776,99-2778 and 99-2782 ANALYSES RESULTS Log#:Sample ID: Analysis: Prep/Analysis Method: Units: Total Lead EPA 6010 mg/kg 99-2764 99-2766 99-2772 99-2774 99-2776 99-2778 99-2782 ARS-1@ ARS-2@: ARS- 5 @: ARS- 6 @ ARS- 7 @: ARS- 8 @ ARS-10 (2 26.0 25.7 19.6 24.7 31.5 33.3 33.9 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: 10/5/99 Attn: Mr. Ed Lump Log #: 99-2764,99-2766,99-2772,99-2774, 99-2776,99-2778 and 99-2782 Date Analyzed: October 4,1999 Analysis Prep/Analysis LCS Spike Duplicate Method % Recovery % Recovery % RPD Total Lead EPA 6010 89 114 3 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 80 % -120 % recovery. 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 75 % -125% recovery. % Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration. RPD (Relative % Difference) = (Spiked Sample - Spike Duplicate) * 100 / Average Result. 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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.025 0.02 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 99-2764 ARS - 1 @ %' *DF <DL 0.600 50 0.390 50 <DL <DL <DL <DL <DL <DL 0.0014 <DL <DL <DL <DL <DL <DL <DL <DL 0.619 <DL <DL <DL <DL <DL <DL <DL <DL Ellen 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' - 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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.005 0.004 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 99-2765 ARS - 1 @ 1 Vi' *DF <DL 0.071 10 0.051 10 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL 0.188 <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.9200S 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 ( fj-^^-^-*'** -* 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 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 99-2766 ARS - 2 @ '/,' *DF <DL 0.19 20 0.085 20 <DL <DL <DL <DL <DL <DL 0.0013 <DL <DL <DL <DL <DL <DL <DL <DL 0.361 <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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 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 99-2767 ARS-2@1'/,' *DF <DL 0.154 20 0.08 20 <DL <DL <DL <DL <DL <DL 0.0017 <DL <DL <DL <DL <DL <DL <DL <DL 0.361 <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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.005 0.004 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 99-2768 ARS - 3 @ Vi' *DF <DL 0.083 10 0.027 10 <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 Ellen Atienzar 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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 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 99-2769 ARS - 3 @ 1' (Refusal) *DF <DL 0.132 20 0.042 20 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL 0.313 <DL <DL <DL <DL <DL <DL <DL <DL Ellen Atienza p-" 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 frfei^ 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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 Log Number: Sample ID: 99-2770 ARS - 4 @ '/i' *DF <DL 0.068 20 0.047 20 <DL <DL <DL <DL <DL 0.0035 <DL <DL <DL <DL <DL <DL <DL <DL <DL 0.168 <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 C/^xo2X*i-. •- 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 rag/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.005 0.004 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 99-2771 ARS-4@l'/j' *DF <DL 0.061 10 0.038 10 <DL <DL <DL <DL <DL 0.0037 <DL <DL <DL <DL <DL <DL <DL <DL <DL 0.117 <DL <DL <DL <DL <DL <DL <DL <DL Ellen Atienza Y 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 (ri> dQ~*^-j 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 rag/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.02 0.016 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 99-2772 ARS - 5 @ W *DF <DL 0.144 40 0.072 40 <DL <DL <DL <DL <DL 0.0047 <DL <DL <DL <DL <DL <DL <DL <DL <DL 0.201 <DL <DL <DL <DL <DL <DL <DL <DL Ellen Atienza "y 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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 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 S 99-2773 ARS - 5 @ 1 W <DL 0.0031 0.003 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL 99-2774 ARS-6@'/,' <DL 0.004 0.00082 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL Enefi 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 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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 ing/kg 9/22/99 9/23/99 Log Number: Sample ID: 99-2775 ARS - 6 @ 1 %' <DL 0.00081 <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 99-2779 ARS-8®!1/*' <DL 0.0032 0.0026 <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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.005 0.004 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 ••— ^ 99-2776 ARS - 7 @ %' *DF <DL 0.071 10 0.049 10 <DL <DL <DL <DL <DL <DL <DL 0.0048 <DL <DL <DL <DL <DL <DL <DL 0.059 <DL <DL <DL <DL <DL <DL <DL <DL Ellen Atienza y 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&^ 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 nig/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.0025 0.002 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 99-2777 ARS - 7 @ 1 '/i' *DF <DL 0.031 5 0.023 5 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL 0.066 <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 Dleldrin 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 8?ft^ 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.025 0.02 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 99-2778 ARS-8@'/2' *DF <DL 0.130 50 0.083 50 <DL <DL <DL <DL <DL <DL 0.0011 0.009 <DL <DL <DL <DL <DL <DL <DL 0.208 <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 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 Detection Log Number: Limit Sample ID: 0.0005 0.02 0.016 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 s 99-2780 ARS-9@V4' *DF <DL 0.094 40 0.072 40 <DL <DL <DL <DL <DL 0.0009 0.0009 0.0087 <DL <DL <DL <DL <DL <DL <DL 0.233 <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 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 / 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 Log Number: Sample ID: 99-2781 ARS - 9 @ 1 1A' *DF <DL 0.117 20 0.076 20 <DL <DL <DL <DL <DL 0.01 <DL <DL <DL <DL <DL <DL <DL <DL <DL 0.185 <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 o> 9/27/99 9/21/99 3:20 PM 9/21/99 EA Soil EPA 3550/3620/8080 mg/kg 9/22/99 9/23/99 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 99-2782 ARS - 10 @ Vi' <DL 0.0018 0.002 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL 99-2783 ARS-10@l'/a' <DL 0.0007 <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 Operations Manager D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 San Diego, CA 92121 (858) 566-4540 FAX (858) 566-4542 Date: Attn: Log#: Date Extracted: Date Analyzed: Extraction Method: Analysis Method: METHOD BLANK QUALITY CONTROL DATA REPORT 9/27/99 Mr. Ed Lump 99-2764 to 99-2783 9/22/99 September 23,1999 EPA 3550/3620 EPA 8080 No target analytes were detected in the method blank. LABORATORY CONTROL STANDARD Compound % Recovery QC Limits % * G-BHC(Lindane) Heptachlor Aldrin Dieldrin Endrin 4,4' DDT PCB(1260) MATRIX SPIKE RESULTS (99-2734) 101 109 107 115 123 102 95 32-127 34-111 42-122 36-146 30-147 25-160 8-127 Compound Spike % Recovery Spike Dup. % Recovery MS/MSD RPD % G-BHC (Lindane) Heptachlor Aldrin Dieldrin Endrin 4,4 - DDT 75 80 82 115 123 102 77 82 85 77 101 87 1 2 4 79 103 91 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. il 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 99-2764 99-2765 99-2766 99-2767 99-2768 99-2769 99-2770 99-2771 99-2772 99-2773 99-2774 99-2775 99-2776 99-2777 99-2778 99-2779 99-2780 99-2781 99-2782 99-2783 99-2783 MS 99-2783 MSD LCS 84% 90% 83% 83% 80% 66% 83% 85% 79% 84% 80% 81% 81% 83% 81% 88% 82% 80% 84% 83% 83% 82% 84% 107% QC Limits: 43 to 169% 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 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 \j£) f ) *-~ s. 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 9/21/99 9/21/99 3:20 PM EA Soil EPA 3550/8140 mg/kg 9/22/99 9/28/99 Log Number: Sample ID: 99-2764 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. 99-2766 ARS - 2 @ 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 9/21/99 9/21/99 3:20 PM EA Soil EPA 3550/8140 mg/kg 9/22/99 9/28/99 Log Number: Sample ID: 99-2768 ARS - 3 @ '/*' <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. 99-2770 *DF ARS - 4 @ %' *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 9/21/99 9/21/99 3:20 PM EA Soil EPA 3550/8140 rag/kg 9/22/99 9/28/99 Log Number: Sample ID: 99-2772 ARS - 5 @ '/ <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. 99-2774 i' *DF ARS-6@'/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 Xjly"""*^ p 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 9/21/99 9/21/99 3:20 PM EA Soil EPA 3550/8140 mg/kg 9/22/99 9/28/99 Log Number: Sample ID: 99-2776 ARS - 7 @ '/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. 99-2778 ARS - 8 @ 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. 0.12 <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 9/21/99 9/21/99 3:20 PM EA Soil EPA 3550/8140 mg/kg 9/22/99 9/28/99 Log Number: Sample ID: 99-2780 ARS -9@V. <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. 99-2782 i' *DF ARS-10@'/z' *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#: 99-2764,99-2766,99-2768,99-2770,99-2772,99-2774, 99-2776,99-2778,99-2780 and 99-2782 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% 99-2764 76% 99-2766 70% 99-2768 82% 99-2770 76% 99-2772 84% 99-2774 86% 99-2776 80% 99-2778 70% 99-2780 120% 99-2782 116% 99-2731 MS 104% 99-2731 MSB 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. 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 10/8/99 9/21/99 9/21/99 3:20 PM EA Soil EPA 8150 mg/kg 9/23/99 10/6/99 Log Number: Sample ID: 99-2764 ARS - 1 @ VS <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. 0.0016 <D.L. 99-2766 ' *DF ARS-2@y2' *DF <D.L. 0.013 <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. 0.0061 <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 10/8/99 9/21/99 9/21/99 3:20 PM EA Soil EPA 8150 mg/kg 9/23/99 10/6/99 Log Number: Sample ID: 99-2768 ARS - 3 @ V <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. 99-2770 V *DF ARS-4@%' *DF <D.L. 0.0095 <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. 0.002 <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: Detection Analysis Limit 10/8/99 9/21/99 9/21/99 3:20 PM EA Soil EPA 8150 mg/kg 9/23/99 10/6/99 Log Number: 99-2772 99-2774 Sample ID: ARS-S®1/*' *DF ARS-6@V2* *DF 2,4,5 - T 0.0012 2,4, DB 0.005 2,4, - D 0.0011 Dalapon 0.0005 Dicamba 0.0006 Dichloroprop 0.0008 Dinoseb 0.0011 MCPA 0.20 MCPP 0.15 Pentachlorophenol 0.001 Silvex 0.0012 <D.L. 0.0089 <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 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 10/8/99 9/21/99 9/21/99 3:20 PM EA Soil EPA 8150 rag/kg 9/23/99 10/6/99 Log Number: Sample ID: 99-2776 ARS - 7 @ V <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. 99-2778 V *DF ARS-8@>/z' *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 v 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 10/8/99 9/21/99 9/21/99 3:20 PM EA Soil EPA 8150 rag/kg 9/23/99 10/6/99 Log Number: Sample ID: 99-2780 ARS - 9 @ V <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. <D.L. 99-2782 V *DF ARS-IO®1/!5 *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: 10/8/99 Attn: Mr. Ed Lump Log # 99-2764,99-2766,99-2768,99-2770,99-2772,99-2774, 99-2776,99-2778,99-2780 and 99-2782 Date Extracted: 9/23/99 Date Analyzed: October 6,1999 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 88 2,4,5 - TP (SILVEX) 84 2,4,5 - T 88 MATRIX SPIKE RESULTS (99-2782) COMPOUND SPIKE SPIKE DUP % RECOVERY % RECOVERY RPD % 2,4-D 62 64 3 2,4,5,-TP (SILVEX) 77 80 4 2,4,5-T 66 67 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 (DCAA) Log # Percent Recovery; Method Blank 92% 99-2764 81% 99-2766 56% 99-2768 70% 99-2770 84% 99-2772 76% 99-2774 74% 99-2776 64% 99-2778 62% 99-2780 72% 99-2782 72% 99-2782 MS 78% 99-2782 MSD 80% LCS 100% 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: 10/5/99 Sampling Date: 9/20/99 Date Sample Received: 9/20/99 Time Sample Received: 3:35 PM Date Extracted: 9/22 and 27/99 Date Analyzed: September 23 and October 4,1999 Analyzed By: DC, EA and JV Sample Type: Soil Project Name: E2759-SC Log Numbers: 99-2743 to 99-2747 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: Sampling Date: Date Sample Received: Date Extracted: Date Analyzed: Analyzed By: Sample Type: Project Name: Log Numbers: 10/5/99 9/20/99 9/20/99 9/27/99 October 4,1999 EA and JV Soil E2759-SC 99-2743 to 99-2747 ANALYSES RESULTS Log Number: Analysis: Prep/Analysis Method: Units: Sample ID: TRPH EPA 418.1 rag/kg Total Lead EPA 6010 mg/kg 99-2743 99-2744 99-2745 99-2746 99-2747 DS-1 @ 0-1' DS-2 @ 0-1' DS-3 @ 0-1' DS-4 @ 0-1' DS-5 ® 0-1' <10.0 10.0 12.1 <10.0 <10.0 27.0 30.0 Ellen Atienza Operations Manager TRPH - Total Recoverable Petroleum Hydrocarbon D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 San Diego, CA 92121 (858) 566-4540 FAX (858) 566-4542 Date: Attn: Log#: Date Extracted: Date Analyzed: QUALITY CONTROL DATA REPORT 10/5/99 Mr. Ed Lump 99-2743 to 99-2747 September 27,1999 October 4,1999 Analysis Prep/Analysis Method LCS % Recovery Spike % Recovery Duplicate %RPD TRPH Total Lead EPA 418.1 EPA 6010 102 89 94 114 4 3 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 80 % -120 % recovery. 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 75 % -125% recovery. % Recovery = (Spike Sample Result - Sample Result) *100/Spike Concentration. RPD (Relative % Difference) = (Spiked Sample - Spike Duplicate) * 100 / Average Result. 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: Analyzed By: Sample Type: Method: Unit: Date Extracted: Date Analyzed: 10/5/99 9/20/99 9/20/99 DC Soil EPA 3550/8270 rag/kg 9/22/99 9/23/99 Analysis 1 ,2,4,5-Tetrachlorobenzene 1,2- Dichlorobenzene 1 ,2-Diphenylhydrazine 1 ,2,4-Trichlorobenzene 1,3 -Dichlorobenzene 1 ,4-Dichlorobenzene 1 -Chloronaphthalene 1 -Naphthylamine 2,3 ,4,6-Tetrachlorophenol 2,4,5-Trichlorophenol 2,4,6-Trichlorophenol 2,4-Dichlorophenol 2,4-Dimethylphenol 2,4-Dinitrotoluene 2,4-Dinitrophenol 2,6-Dichlorophenol 2,6-Dinitrotoluene 2-Chloronaphthalene 2-Chlorophenol 2-Methylnaphthalene Detection Limits .250 .0475 .250 .0475 .0475 .110 .250 .250 .250 .250 .0675 .0675 .0675 .143 1.050 .250 .0475 .0475 .0825 .250 Log Number: 99-2745 Sample ID: DS-3 @ 0-1' <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL 99-2747 DS-5 @ 0-1' <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 San Diego, CA 92121 (858) 566-4540 FAX (858) 566-4542 Analysis 2-Methylphenol 2-Methyl-4,6-Dinitrophenol 2-Naphthylamine 2-Nitroaniline 2-Nitrophenol 2-Picoline 3,3 '-Dichlorobenzidine 3 -Methylcholoanthrene 3-Nitroaniline 4,4'-DDD 4,4'-DDE 4,4'-DDT 4-Aminobiphenyl 4-Bromophenyl Phenyl Ether 4-Chloroaniline 4-Chlorophenyl-phenyl Ether 4-Chloro-3 -methy Iphenol 4-Methylphenol 4-Nitroaniline 4-Nitrophenol 7,12-Dimethylbenz (a) Anthracene Acenaphthene Acenaphthylene Acetophenone Aldrin alpha BHC Aniline Anthracene a-,a-Dimethylphenethylamine Benzidine Benzoic Acid Benzo (A) anthracene Benzo (A) pyrene Benzo (B) fluoranthene Benzo (G,H,I) perylene Benzo (K) fluoranthene Benzyl Alcohol Detection Limits .250 .600 .250 .250 .090 .250 .413 .250 .250 .070 .140 .118 .250 .0475 .250 .105 .075 .250 .250 .060 .250 .0475 .0875 .250 .0475 .250 .250 .0475 .250 1.100 1.250 .195 .0625 .120 .102 .0625 .500 Log Number: 99-2745 Sample ID: DS-3 @ 0-1' <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 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL 99-2747 DS-5 @ 0-1' <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 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 San Diego, CA 92121 (858) 566-4540 FAX (858) 566-4542 Analysis beta BHC Nitrobenzene N-Nitrosodimethylamine bis (2-chloroethyl) ether bis (2-Chloroethoxy) methane bis (2-Chloroisopropyl) ether bis (2-Ethylhexyl)phthalate Butyl Benzyl Phthalate Chlordane Chrysene delta BHC Dibenzofuran Dibenzo (A,H) Anthracene Dibenz (A,J) Acridine Dieldrin Diethyl Phthalate Dimethyl Phthalate Diphenylamine Di-n-butylphthalate Di-n-Octylphthalate Endosulfan I Endosulfan II Endosulfan Sulfate Endrin Endrin Aldehyde Endrin Ketone Ethyl Methanesulfonate Fluoranthene Fluorene gamma BHC Heptachlor Heptachlor Epoxide Hexachlorobenzene Hexachlorobutadiene Hexachlorocyclopentadiene Hexachloroethane Indeno (1,2,3-CD) Pyrene Detection Limits .105 .0475 .250 .143 .133 .143 .0625 .0625 .250 .0625 .250 .250 .0625 .250 .0625 .0475 .040 .250 .0625 .0625 .250 .250 .140 .250 .250 .250 .250 .055 .0475 .0775 .0475 .055 .0475 .0225 .250 .040 .0925 Log Number: 99-2745 Sample ID: DS-3 @ 0-1' <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 <DL <DL <DL <DL <DL <DL <DL <DL <DL <DL 99-2747 DS-5 @ 0-1' <DL <DL <DL <DL <DL <DL 0.225 <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 <DL <DL <DL D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 San Diego, CA 92121 (858) 566-4540 FAX (858) 566-4542 Analysis Isophorone Methoxychlor Methyl Methanesulfonate N-Nitrosodiphenylamine Naphthalene N-Nitrosodi-N-Propylamine N-Nitrosopiperidine N-Nitroso-Di-N-Butylamine PCB 1016 PCB 1221 PCB 1232 PCB 1242 PCB 1248 PCB-1254 PCB-1260 Pentachlorobenzene Pentachloronitrobenzene Pentachlorophenol Phenacetin Phenanthrene Phenol Pronamide Pyrene p-Dimethylaminoazobenzene Toxaphene Detection Limits .055 .250 .250 .0475 .040 .250 .250 .250 .250 .750 .250 .250 .250 .900 .250 .250 .250 .090 .250 .135 .037 .250 .047 .250 .250 Log Number: 99-2745 Sample ID: DS-3 @ 0-1' <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 99-2747 DS-5 @ 0-1' <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 QUALITY CONTROL DATA REPORT Date: Attn: Log#: 10/5/99 Mr. Ed Lump 99-2745 and 99-2747 Date Extracted: Date Analyzed: Extraction Method: Analysis Method: 9/22/99 September 23,1999 3550 8270 METHOD BLANK No Target Analytes were found in the Method Blank. """ LCS Recoveries 1,4-Dichlorobenzene N-Nitroso-di-n-propylamine 1 ,2,4-TrichIorobenzene Acenaphthene 2,4-Dinitrotoluene Pyrene Phenol 2-ChlorophenoI 4-Chloro-3-Methylphenol 4-NitrophenoI Pentachlorophenol % Recovery 72.52 95.80 81.46 88.86 74.01 86.27 74.33 75.71 82.95 45.91 73.25 QC Limits % ** 36-105 41-116 39-98 46-118 24-120 26-127 12-110 27-123 23-117 10-133 9-118 Dup. % Rec. 71.42 92.75 82.40 88.12 74.48 92.93 71.83 73.51 80.64 45.16 73.55 RPD % 1.54 3.24 1.16 .83 .62 7.44 3.42 2.95 2.82 1.65 .40 Maximum RPD% 28 38 28 31 38 31 42 40 42 50 50 D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 San Diego, CA 92121 (858)566-4540 FAX (858) 566-4542 SURROGATE RECOVERIES Acid Extractable Surrogate Recoveries Log# 99-2745 99-2747 LCS LCS DUP Method Blank 2-Fluorophenol 81.3% 79.1% 89.9% 84.9% 88.1% Phenol-d5 70.3% 69.8% 85.9% 83.0% 80.6% 2,4,6-Tribromophenol 73.6% 83.5% 77.2% 77.3% 78.4% QC Limits 21-105%10-107%10-123% B/N Surrogates Recoveries Log# 99-2745 99-2747 LCS LCS DUP Method Blank Nitrobenzene-d5 65.5% 69.7% 80.3% 79.3% 76.4% 2-Fluorobiphenyl 76.2% 81.5% 83.7% 84.3% 84.3% Terphenyl-dl4 134.3% 126.1% 118.1% 95.7% 126.9% QC Limits 35-114%43-116%33-141% Ellen Atienza Operations Manager D-TEK Analytical Laboratories, Inc. 9020 Kenamar Drive, Suite 205 SAN DIEGO, CA 92121 (858) 566^540, FAX (858) 566-4542 CHAIN OF CUSTODY DATE PAGE I I_| _ OF J _ D-TEK LOG #:TO #: CUSTOMER INFORMATION COMPANjfP ^ ( \ CONTACT PERSON: C!T V » PROJECT MANAGER: . « ADDRESS: f-\ \ ;s. .-^ CITY: ZIP: 3HONEl 1 ^""^ - "~"^v ^^^T^> V ^v \ ^"*? f"\ * * VJ FAX: L>Wo) cnx-fc^ ^ D-TEK LOG # 97-2743 7<7_2744 ??-Z7<*.$~ 97-274^ 9*?- 27^-7 SAMPLE # / SAMPLE IDENTIFICATION \}3 "\ '0'^j-\/ ^S-i'd ^-\' ^C3'^ Cj ts- V "^•S-v^ S* O- V ^S^S o fc- 1' SAMPLE jNjgGRjTY t, RELINQUISHED BY: DATE AND TIME: 7/2$/'?<?' 1 £>~3£" SIGNATURE: *^~-«— X — -N^ PRINTED NAME: Q^«\ V.xV^-_ n 1,:RECE'IVED^BY:^:^: ::i^:;;i:.';-: ;!: **$•'.' •. ''••/•' ' '.^••'.'^ DATE AND TIME: J/ZC/f? /5"33" SIGNATURE: x^/^jst.*-!— — _ PRINTED NAME: //<#1 eZstfttoSCM/ taOJECT INFORMATION PROJECT NAMBN.UMBEjt BILLING INFORMATION BILL TO: /""* ^ A _>-^ ADDRESS^, ^^X^^VJL,, PHONE: J>j^\>fV_^ P.O.* •" SAMPLE DATE ^^S \^ ^v. ,\ Hil^ SAMPLE TIME V.3o \\5t5 X\5 VOt XX5 SAMPLE MATRIX J$>\ ^ ^ * T» CONTAIN TYPE fe^Sj Y» "Vi "V V # OF C O N T A 1 N E R S I \ 1 \ \ MEETS HOLDING TIME? CORRECT CONTAINERS ? 2. RELINQUISHED BY; DATE AND TIME:' SIGNATURE: PRINTED NAME: fc RECEIVED BY: .':.;: ;::..::::...:': . ; :: : ';:;; DATE AND TIME: SIGNATURE: PRINTED NAME: I \ \ \ \ \ Y/N Y/N P & N \- Y/N Y/N j r" "N \ Y/N Y/N 3. RELINQUISHED BY: DATE AND TIME: SIGNATURE: PRINTED NAME: 3:;;REe'EWEb:iY: i^M^:- ' ^\"^ . ' .• " iii DATE AND TIME: SIGNATURE: PRINTED NAME: Y/N Y/N Y/N Y/N ANALYSIS REQUEST Y/N Y/N Y/N Y/N SAMPLE RECEIPT RECEIVED IN ICE? YES/NO TAPE SEAL INTACT Y/N NA PRESERVATIVE YES/NO NA PRECAUTIONS: Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N SPECIAL INSTRUCTIONS TAT - ALL SAMPLES ARE SUBJECT TO TERMS AND CONDITIONS ON REVERSE SIDE - ChainofCustodyFwm.xls 2/1/91 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 ate 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. Payment: Payment 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