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i <br /> QUALITY ASSURANCE REPORT <br /> Applied Geotechnology Inc. <br /> PROJECT AND SAMPLE INFORMATION <br /> fProject Name: USG Stockton <br /> Project No.: 14,937.039 <br /> Lab Name: ATI - Renton <br />' Lab Number: All 4 9006-109 <br /> Sample No.: PW-3, PW-4,Trip Blank <br /> Matrix: Water <br /> QUALITY ASSURANCE SUMMARY <br /> All data is of known and acceptable quality. <br /> ANALYTICAL METHODS <br /> Parameter Technique Method <br /> Volatile organic compounds GCIELCD,GCIPID EPA 8010/8020 <br /> Phenols GC/MS EPA 8270 <br /> Fuel Hydrocarbons GC/FID EPA 8015 Modified <br /> Metals AA/GF, AA/F EPA 7000 Series <br /> TIMELINESS Time Time <br /> Date Date Date Till Till <br /> Parameter Sampled Extracted Analyzed Extraction Analysis <br /> Volatile organic compounds 06/14/90 N/A 06/18/90 N/A 4 (14) <br /> 06/14/90 N/A 06/19/90 N/A 5 (14) <br /> Phenols 06/14/90 06/16/90 06/19/90 2 (7) 5 (40) <br /> Fuel Hydrocarbons 06/14/90 06/18/90 06/20/90 4 6 (14) <br /> 06/14/90 06/18/90 06/22/90 4 8 (14) <br /> I Metals 06/14/90 N/R 07/02/90 N/R 18 (180) <br /> N/A - Not applicable <br /> N/R - Not reported <br /> . The report date has been used to verity the holding times for metals. <br /> Numbers in parenthesis()indicate recommended holding times for water. <br /> The CA LUFT Method is referenced for fuel hydrocarbon holding times. <br /> All samples were extracted and analyzed within recommended holding times for water. <br /> FIELD QUALITY CONTROL SAMPLES <br /> Field Duplicates: None were collected <br /> i <br /> Rinsate: None collected <br /> LAB QUALITY CONTROL SAMPLES <br /> I Reagent Blank: No contamination was present. <br /> LMatrix Spikes: The matrix spikeimatrix spike duplicate°ob recoveries, and RPD cata are within ATI <br /> L control limit criteria for following methods: <br /> • . EPA 8270 EPA 8015 Modified <br /> �;' EPA 8010/8020 EPA 7000 Series <br />