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Home My WebLink About1715-SD; Kelly Property Zone 20; Kelly Property Zone 20; 1994-07-25Note: On March 22, 1995 the ownership of the property changed from Kelly to MSP California, LLC. The project name also changed to Emerald Ridge West and the number of units reduced 1 to 61 single-family units and 10 affordable 2nd dwelling units for a total of 71. PRELIMINARY PESTICIDE RESIDUE SURVEY KELLY PROPERTY, APN 212-040-32 & 36 CARLSBAD ZONE 20 - SP# 203 CITY OF CARLSBAD, COUNTY OF SAN DIEGO, CALIFORNIA FOR MR. ROBERT P. AND RICHARD C. KELLY TRUSTEES OF THE KELLY TRUST, UDT 8-31-82 2770 SUNNY CREEK ROAD CARLSBAD, CALIFORNIA JULY 25, 1994 W.O. 1715-SD MAY 2 8 FFmVED JUL 261994 LADWIB DESIGN GR f GeoSoils, Inc. j . Geotechnical • Geologic • Environmental 5741 Palmer Way • Carlsbad, California 92008 • (619)438-3155 • FAX (619) 931-0915 July 25, 1994 W.O. 1715-SD MR. ROBERT P. AND RICHARD C. KELLY Trustees of the Kelly Trust, UDT 8-31-82 2770 Sunny Creek Road Carlsbad, California Subject: Preliminary Pesticide Residue Survey Kelly Property, APN 212-040-32 & 36 Carlsbad Zone 20 - SP# 203 City of Carlsbad, County of San Diego, California GeoSoils, Inc. is pleased to present the results of our preliminary pesticide residue survey of the subject property. This survey was conducted for the purpose of assessing the potential for the presence of hazardous agricultural substance contamination at the site. SUMMARY Based upon the information obtained during the course of this preliminary survey, GeoSoils, Inc. presents the following summary of findings and conclusions. No hazardous levels of agricultural pesticides or herbicides detected were noted in soil samples collected from eight random sites within the subject property. • Minute detectable levels (less than 5 parts per trillion) of some constituents of Dioxin (HpCDD, HxCDD and OCDD) were noted in soil samples collected from the eight random sites (see Appendix I); however, the most hazardous isomer of Dioxin, TCDD was not detected. Minute detectable levels (less than 0.1 parts per million) of DDE, DDT and AROCLOR- 1254 (PCB's) were noted in the composite soil sample. • Based upon the enclosed test results, GSI does not recommend additional sampling and testing. THE KELLY PROPERTY W.O. 1715-SD JULY 25, 1994 PAGE 2 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. Edward P. Lump, REA, RG 5975 Project Geologist EPL/ARK/mb Albert R. Kleist, RCE Principal Engineer Enclosures: Plate 1, Sample Location/Topographic Map Table 1, Summary of Laboratory Test Data; Detected Pesticides Appendix I, Laboratory Analysis Report and Chain of Custody Report xc: (2) Addressee (3) Mr. Robert Ladwig, Ladwig Design Group, Inc. GeoSoils, Inc. THE KELLY PROPERTY JULY 25, 1994 W.O. 1715-SD PAGE 1 INTRODUCTION In accordance with our proposal and your authorization, GeoSoils, Inc. (GSI) has completed this preliminary pesticide residue survey on the subject property in Carlsbad, California. The purpose of this survey is to evaluate the potential for soil contamination onsite from pesticides, as dictated in the general EIR. This preliminary survey is based upon discussions with Mr. Ladwig (Ladwig Design Group, Inc.), our field work on June 21, 1994, results of the analytical chemical testing program (July 6 & 20, 1994), and previous telephone conversations with Mr. Brian Hunter (Planning Department with the City of Carlsbad). Site Description The irregularly shaped property, roughly 56 ± acres in size, is comprised of active agricultural land, and both undisturbed and disturbed native vegetation. Canyon de las Encinas, an ephemeral stream (i.e., flows in direct response to precipitation) is situated directly north of the property. The site consists of an undeveloped, northerly draining canyon between two relatively flat ridges. Topographically, slopes on the western half of the property are steeper than slopes on the eastern half. North facing slopes, descending to Canyon de las Encinas, are relatively steep on both ridges. At the time of our site reconnaissance, row crops underlain by clear plastic sheeting, had been harvested on the western ridge. Crops appear to be irrigated via a drip irrigation system shared with the adjacent property to the west. It is our understanding that the Ykegawa Brothers have been operators of the existing agricultural development for the past six (6) months. Agricultural Chemical Usages According to previous conversations with Mr. Pete Machauif, onsite foreman with the Ykegawa Brothers, the following is a list of agricultural products used on the property by the Ykegawa Brothers. Restricted and Unrestricted Products List Dipel Kocide Javin Bayleton Monitor Ridimil Sygon Bravo Lammate Benlate Asana Thiolux Roundup Gramoxone GeoSoils, Inc. THE KELLY PROPERTY JULY 25, 1994 W.O. 1715-SD PAGE 2 SCOPE OF WORK To evaluate the potential for soil contamination from hazardous agricultural substances (Figure 1) onsite, soil samples were collected from the upper one (1) foot of existing earth materials, from eight random sites throughout the site (see Plate 1). Soils encountered among the row crops consisted of moist to slightly moist, red brown to brown silty sands. Soils encountered in the currently undeveloped areas of the property, encountered a dark-colored slightly moist, clayey topsoil, that was locally very sandy. Although the eastern undeveloped areas had been disced recently, a high percentage of weeds/grasses were encountered. Holes were excavated using a six (6) inch diameter hand auger. Samples were collected, stored and transported to a California Department of Health Services (DHS) certified laboratory the same day, following proper procedures. Chain-of-Custody document, recorded with both laboratories, are included in Appendix I. CHEMICAL ANALYSIS AND RESULTS Quality Assurance Laboratory, conducted the majority of the composite qualitative analysis (see Appendix I). Due to the elaborate testing procedures, Dioxin testing was conducted by Pacific Analytical. Remaining samples were archived for future testing. Chemical testing consisted of following substances: • One (1) composite soil sample (from 8 random sites) tested for hazardous agricultural substances, utilizing EPA Test Method 8080 (Chlorinated Pesticides and PCB's) and EPA Test Method 8150 (Chlorinated Herbicides). • One (1) composite soil sample (from 8 random sites) tested for organic lead compounds, utilizing Department of Health Services Method. • One (1) composite soil sample (from 8 random sites) tested for trichloroethylene (TCE), utilizing EPA Test Method 8010 (Purgeables Halogenated Volatile Organics). • One (1) composite soil sample (from 8 random sites) tested for dioxins, utilizing EPA Test Method 1613, which exceeds the requirements of EPA method 8280. Chemical testing did not detect Halogenated Volatile Organics (EPA 8010) or Chlorinated Herbicides (EPA 8150) concentrations (see Appendix I). A combined concentration of 0.68 mg/Kg (mg/Kg equivalent to parts per million-ppm) was detected in the analysis for organic lead. There were no detected concentration of the toxic polymer of Dioxin (2378-TCDD); however, various lesser constituents of dioxin were detected at levels below 5 parts per trillion (ppt). Most constituents of the Organochlorine Pesticides and PCB's (EPA 8080) were not detected in laboratory testing; however, 4,4'-DDE, 4,4'-DDTand AROCLOR-1254 had concentrations of 0.029, 0.055 and 0.093 mg/Kg (ppm), respectively. Total Threshold Limit Concentrations (TTLC) GeoSoils, Inc. TABLE 3.9-3 HAZARDOUS AGRICULTURAL SUBSTANCES Substance Aldrin Chlordan DDT,DDE,DDD 2f4iDichlorophenoxyacstic acid Dieldrin .Dioxin (2,3,7,8-TCDD) Endrin Heptachlor Kepone Lead compounds, organic IJndane Methoxychlor Mircx Pentachlorophenol Polychlorinated biphenyls (PCBs) Toxaphene TrichloroetSylene 2,4,5-Tricnlorophenoxy- propionic acid Soluble Threshold LSmit Concenffafipn mg/1 0.14 0.25 0.1 10 • 0.8 0.001 0.02 0.47 2.1 0.4 •10 2.1 1.7 5.0 0.5 204 1.0 Total Threshold Limit Concentration wei-Wcight mg/kg 1.4 2.5 1.0 100 8.0 0.01 0.2 4.7 21 13 4.0 100 21 17 50 5 2,040 10 Source: County of San Diego, Department of Health Services, Hazardous Materials Management Division m-102 THE KELLY PROPERTY CARLSBAD, CALIFORNIA DATE 7-94 WO MH 1715-SD Geotechnical Engineering • Engineering Geology FORM 89/22 FIGURE 1 THE kELLY PROPERTY JULY 25, 1994 W.O. 1715-SD PAGE 3 regulatory levels for these substances are 1.0,1.0 and 50.0 mg/Kg, respectively. Considering the composite sample test results, all detectable concentrations are still significantly below TTLC regulatory levels. A summary of this data is provided in Table 1. Results, reported in units of ng/KG (ng/Kg equivalent to parts per trillion, or ppt), of the composite test indicated that generic Dioxin (2,3,7,8-TCDD) was not detected (Appendix I). Other isomers of Dioxin (1,2,3,4,7,8-HxCDD, 1,2,3,6,7,8-HxCDD, 1,2,3,7,8,9-HxCDD, 1,2,3,4,6,7,8- HpCDD and OCDD) had detected concentrations between 0.2 ppt and 4.9 ppt, respectively. The analyte 2,3,7,8-TCDF, a derivative of Dioxin was not detected. TTLC regulatory levels for Dioxin (2,3,7,8-TCDD) is 0.01 mg/Kg (i.e., ppm). For comparison purposes, Soluble Threshold Limit Concentration (STLC) regulatory levels for Dioxin is 0.001 mg/Kg. CONCLUSIONS No hazardous levels of hazardous agricultural substances were detected in soil samples collected from eight random sites within the subject property. It is our opinion that the detected concentrations of the two pesticides (4,4'-DDE; 4,4'- DDT) and AROCLOR-1254 (PCB's) are sufficiently below TTLC regulatory levels to not warrant additional testing or assessment at this time. It is our opinion that the minute detected concentrations of Dioxin isomers (1,2,3,4,7,8- HxCDD, 1,2,3,6,7,8-HxCDD, 1,2,3,7,8,9-HxCDD, 1,2,3,4,6,7,8-HpCDD and OCDD) are sufficiently below TTLC regulatory levels to not warrant additional testing or assessment at this time. Based upon the enclosed test results, GSI does not recommend additional sampling and testing. GeoSoils, Inc. KELLY PROPERTY W.O. 1715-SD JULY 25, 1994 TABLE 1 SUMMARY OF LABORATORY DATA HA-(1-8) 0-1 '/COMPOSITE PARAMETER 4, 4'-DDE 4, 4'-DDT AROCLOR- 1254 (PCB) CHEMICAL ANALYSIS; DETECTED PESTICIDES & PCB'S EPA 0080 DETECTED CONCENTRATIONS (MG/KG) 0.029 0.055 0.093 REGULATORY LEVELS TFLC* (MG/KO) 1.0 1.0 50.0 *TTLC- TOTAL THRESHOLD LIMIT CONCENTRATIONS. GeoSoils, Inc. APPENDIX I LABORATORY ANALYSIS REPORT AND CHAIN OF CUSTODY REPORT GeoSoils, Inc. Quality Assurance Laboratory 6605 NANCY RIDGE DRIVE SAN DIEGO, CALIFORNIA 92121 (619) 552-3636 GEO SOILS, INC. ATTN: ED LUMP 5741 PALMER WAY CARLSBAD, CA 92008 DATE OF REPORT DATE SAMPLE RECEIVED SAMPLING DATE ANALYZED BY SAMPLE TYPE PROJECT NAME 7-6-94 6-21-94 6-21-94 JM MAV EA SOIL KELLY/W.O. 1715-SD ANALYSES RESULTS LOG NUMBER SAMPLE ID ANALYSIS: ORGANIC LEAD PREP/ANALYSIS METHOD: DHS UNITS: MG/KG DF 10481-9406 HA-1 @ 0-1'A 0-1' C o-r E o-r F o-r H 0.68 HA-5 HA-7 HA-8 DHS - RECOMMENDED PROCEDURE FROM LEAKING UNDERGROUND FUEL TANK FIELD MANUAL/OCTOBER 1989. DF = DILUTION FACTOR. THE DETECTION LIMITS AND ANALYSES RESULTS HAVE BEEN CORRECTED ACCORDINGLY. DATE EXTRACTED: 6-28-94 - ORGANIC LEAD DATE ANALYZED: 7-5-94 - ORGANIC LEAD PETER T.L. SHEN LABORATORY DIRECTOR PS/wr QUALITY ASSURANCE. LABORATORY ^07/05/94 SOILS, INC. EXTRACTION METHOD: EPA 5030 ^ANALYSIS METHOD: EPA 8010 DATE EXTRACTED: NA ••DATE ANALYZED: 6-28-94 ^PURGEABLE HALOCARBONS SAMPLE TYPE - SOIL DETECTION "• LIMIT ^ANALYSIS UG/KG ••DICHLORODIFLUOROMETHANE 9 CHLOROMETHANE 0.40 -VINYL CHLORIDE 0.90 BROMOMETHANE 5.9 *"CHLOROETHANE 2.6 TRICHLOROFLUOROMETHANE 2.5 1,1-DICHLOROETHENE 0.65 ^-METHYLENE CHLORIDE 12 cis-1,2-DICHLOROETHENE 0.5 "-trans-1,2-DICHLOROETHENE 0.5 ^.1,1-DICHLOROETHANE 0.35 CHLOROFORM 0.5 ^.1,1,1-TRICHLOROETHANE 0.3 CARBONTETRACHLORIDE 0.6 "•1,2-DICHLOROETHANE 0.3 TRICHLOROETHENE 0.6 "1,2-DICHLOROPROPANE 0.2 k,BROMODICHLOROMETHANE 0.45 2-CHLOROETHYLVINYL ETHER 0.65 F-cis-1,3-DICHLOROPROPENE 1.7 trans-1,3-DICHLOROPROPENE 1.0 *"1,1,2-TRICHLOROETHANE 0.2 TETRACHLOROETHENE 0.3 """blBROMOCHLOROMETHANE 0.45 h-CHLOROBENZENE 1.2 BROMOFORM 1.0 "-1,1,2,2-TETRACHLOROETHANE 0.3 ta1.3-DICHLOROBENZENE 1.6 1,4-DICHLOROBENZENE 1.2 ,.1,2-DICHLOROBENZENE 0.75 B 10481-9406 HA-1 @0-1'A HA-2 @0-1 HA-3@0-1'C HA-4@0-1'D HA-5@0-1'E HA-6@0-1'F HA-7@0-1'G HA-8@0-1'H UG/KG ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND ND *"ND = NONE DETECTED >l13EtER T.L. SHEN ^LABORATORY DIRECTOR *PS/wr .QUALITY ASSURANCE. LABORATORY 07/05/94mm \ GEO SOILS, INC. ^EXTRACTION METHOD: EPA 3550/3620 10481-9406 ^ANALYSIS METHOD: EPA 8080 HA-1 @0-1' A DATE EXTRACTED: 6-22-94 HA-2@0-1'B •-DATE ANALYZED: 6-23-94 HA-3@0-1'C ORGANOCHLORINE PESTICIDES AND RGBs HA-4 @0-1' D ^SAMPLE TYPE - SOIL HA-5 @0-1' E ^ HA-6@0-1'F DETECTION HA-7 @0-1' G • LIMIT HA-8@0-1'H ANALYSIS UG/KG UG/KG a/,41- ODD 0.5 ND 4.4' - DDE* 0.9 29.0* .•4,4' - DDT** 1.4 55.4** ALDRIN 0.2 ND *"ALPHA-BHC 0.6 ND BETA-BHC 0.6 ND ""CHLORDANE 25 ND te.DELTA-BHC 0.6 ND DIELDRIN 0.3 ND p-ENDOSULFAN I 0.3 ND ENDOSULFANII 0.5 ND ^ENDOSULFAN SULFATE 0.4 ND ^ENDRIN 0.4 ND ENDRIN ALDEHYDE 0.5 ND HHEPTACHLOR 0.2 ND HEPTACHLOR EPOXIDE 0.3 ND -LINDANE 0.3 ND JVIETHOXYCHLOR 25 ND TOXAPHENE 25 ND p^ROCLOR-1016 50 ND AROCLOR-1221 50 ND *-AROCLOR-1232 50 ND AROCLOR-1242 50 ND """ARCCLOR-1248 50 ND fcJVROCLOR-1254 50 93.0 AROCLOR-1260 50 ND pm ND = NONE DETECTED *TSECOND COLUMN VERIFICATION PERFORMED. ""' SAMPLE DILUTED BY A FACTOR OF 2. «-" SAMPLE DILUTED BY A FACTOR OF 4. THE DETECTION LIMITS AND ANALYSIS RESULTS WERE CORRECTED ACCORDINGLY. SHEN LABORATORY DIRECTOR .QUALITY ASSURANCE. LABORATORY 07/05/94 Mi ^ GEO SOILS, INC. *" EXTRACTION METHOD: EPA 8150 to ANALYSIS METHOD: EPA 8150 10481-9406 DATE EXTRACTED: 6-22-94 HA-1@0-1'A *" DATE ANALYZED: 6-27-94 HA-2@0-1'B , CHLORINATED HERBICIDES HA-3 @0-1' C SAMPLE TYPE - SOIL HA-4 @0-1' D _ HA-5@0-1'E HA-6@0-1'F «• DETECTION HA-7@0-1'G LIMIT HA-8@0-1'H "ANALYSIS KG/KG UG/KG 2,4,5-T 1.2 ND — 2,4 DB 5.0 ND 2,4-D 1.1 ND *"DALAPON 0.5 ND DICAMBA 0.6 ND *~ DICHLOROPROP 0.8 ND fc-DINOSEB 1.1 ND MCPA 200 ND -MCPP 150 ND ^SILVEX 1.2 ND ^.ND = NONE DETECTED :R SHEN .LABORATORY DIRECTOR *PS/wr .QUALITY ASSURANCE. LABORATORY QUALITY ASSURANCE LABORATORY QUALITY CONTROL DATA REPORT July 5, 1994 GEO SOILS, INC. LOG #10481-9406 DATE EXTRACTED: JUNE 28, 1994- ORGANIC LEAD ANALYSES PREP/ANALYSIS LCS SPIKE DUPLICATE METHOD % RECOVERY %RECOVERY RPD ORGANIC LEAD DHS 108% 100% <1% REBECCA L. RUSH QA/QC SPECIALIST QUALITY CONTROL TERMINOLOGY t£S - LABORATORY CONTROL STANDARD. REPORTED AS «A 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. SUBBQSAIES-COMPOUNDS REPRESENTATIVE OF AGROUPOFCOMPOUNDS.SURROGATESARE SPIKED INTO ENVIRONMENTAL SAMPLES AND% RECOVERY OF CONCENTRATION SPIKED IS CALCULATED AND REPORTED. ACCEPTABLE RANGE VARIES DEPENDING ON SAMPLE MATRIX AND ANALYSIS METHOD. ANY QUALITY ASSURANCE LABORATORY QUALITY CONTROL DATA REPORT uuxy D, GEO SOILS, INC. SAMPLE LOG #10481-9406 DATE ANALYZED: JUNE 28, 1994 EXTRACTION METHOD: 5030 ANALYSIS METHOD: 8010 METHOD BLANK NO TARGET ANALYTES WERE DETECTED IN THE METHOD BLANK. LCS DATA LABORATORY COMPOUND CONTROL SAMPLE % (20ppb) TRICHLOROETHENE 108% CHLOROFORM 95% 1,1, 1-TRICHLOROETHANE 106% CHLOROBENZENE 94% 1 , 2 -DICHLOROPROPANE 9 9 % TETRACHLOROETHENE 109% SPIKE DATA SPIKE RELATIVE COMPOUND %RECOVERY % DIFFERENCE TRICHLOROETHENE 104% 3% CHLOROFORM 94% 3% 1,1,1-TRICHLOROETHANE 10 6 % 0% CHLOROBENZENE 91% 2% 1,2-DICHLOROPROPANE 9 8 % 3 % TETRACHLOROETHENE 102% 3% A complete list of compounds is available upon request. REBECCA L. RUSH QA/QC SPECIALIST QUALITY CONTROL TERMINOLOGY LCS - LABORATORY CONTROL STANDARD. 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 WrTH 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. OF CONCENTRATION SPIKED IS CALCULATED AND REPORTED. ACCEPTABLE RANGE VARIES DEPENDING ON SAMPLE MATRIX AND ANALYSIS METHOD. ANY Olir-OF-CONTROL OATft IS CLEARLY tNOICATf=D. QUALITY ASSURANCE LABORATORY QUALITY CONTROL DATA REPORT July 5, 1994 6EO SOILS, INC. LOG #10481-9406 DATE EXTRACTED: JUNE 22, 1994 DATE ANALYZED: JUNE 23, 1994 EXTRACTION METHOD: 3550/3620 ANALYSIS METHOD: 8080 METHOD BLANK NO TARGET ANALYTES WERE DETECTED IN THE METHOD BLANK LABORATORY CONTROL SAMPLE COMPOUNDS % RECOVERY «• gamma-BHC 92% Heptachlor 98% "" Aldrin 88% ... Dieldrin 101% Endrin 128% *• 4,4-DDT 144% — SPIKE DATA "" COMPOUND SPIKE DUPLICATE _ % RECOVERY RPD gamma-BHC 100% 12% •" Heptachlor 122% 14% Aldrin 112% 14% 3ECCA"LY RUSH QA/QC SPECIALIST QUALITY CONTROL TERMINOLOGY LCS - LABORATORY CONTROL STANDARD. 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. SilRBOSAIEa-COMPOUNOS REPRESENTATIVE OF AGROUPOFCOMPOUNDS. SURROGATES ARESPIKED INTO ENVIRONMENTAL SAMPLES AND% RECOVERY OF CONCENTRATION SPIKED IS CALCULATED AND REPORTED. ACCEPTABLE RANGE VARIES DEPENDING ON SAMPLE MATRIX AND ANALYSIS METHOD. ANY rtitr.rip.rnwTROi OfiTis i^ n earn v 'NniCflTFr* QUALITY ASSURANCE LABORATORY QUALITY CONTROL DATA REPORT July 5, 1994 GEO SOILS, INC. LOG #10481-9406 DATE EXTRACTED: JUNE 22, 1994 DATE ANALYZED: JUNE 27, 1994 ANALYSIS METHOD: EPA 8150 METHOD BLANK NO TARGET ANALYTES WERE DETECTED IN THE METHOD BLANK. LABORATORY CONTROL SAMPLE % COMPOUND RECOVERY DICAMBA 102% DICHLOROPROP 74% 2,4-D 92% 2,4,5-TP (SILVEX) 110% 2,4,5-T 113% 2,4-DB 130% SPIKE DATA SPIKE % DUPLICATE COMPOUND RECOVERY RPD DICAMBA 99% 2% DICHLOROPROP 64% 2% 2,4-D 105% 5% 2,4,5-TP (SILVEX) 92% 20% 2,4,5-T 93% 25% REBECCA L. RUSH QA/QC SPECIALIST QUALITY CONTROL TERMINOLOGY LCS - LABORATORY CONTROL STANDARD. 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. OUT-OF-CONTROL DATA IS CLEARLY INDICATED. • \Q i ii f • • « » i f i f i f i f i I i f i r i i i i i i i § CHAIN OF CUSTODY n^V-^ Quality Assurance Laboratory 6605 Nancy Ridge Drive San Diego, CA 921 21 (619)552^3636 ,Page.of SAMPLE INTEGRITY Y/N Y/N Y/N Y/N Y/N Y/N Y/N Y/N 8IONATUf(El()i TO CONHITIONS ON -AC IF 1C ANALYTICAL. ,34Q Pssee Del Laco, 'srlsoad, CA 92009 .' 5uitel02 July 2O,1994 ED Lump GeoSoi15, Inc. 5741 Palmer Way Carlsbad, CA 920O8 Subject: Dioxin/Furan analysis by methoc 1613 Samole: Composite Please -find enclosed the data package for the one soil sample received on J>.:ne 21,1C94. The data package includes tetra thru octa dioxins and f'-irans by EFA Method Itl3. Method 1613 exceeds the reQ'.ii reTien t= of S2SO. ~he amoLir't extracted 10 arams. The final extract volume was 20 ui. The units for amour t detected and esti/r>a limits are nan eg ram/ k i i ogram (MG/'<G) . ted detection If you have any questions please call. Dan te^ enci vengo Mass Spec Lab Manager