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QUALITY ASSURANCE REPORT <br /> f Applied Geotcchnology Inc. <br /> PROJECT AND SAMPLE INFORMATION <br /> Project Name: USG Stockton <br /> Project No.. 14,937.039 <br /> Lab Name: ATI - Renton, ATI - San Diego <br /> Lab Number: ATI #9006-014 <br /> Sample No.: PW-1, PW-2, MW-3,Trip Blank <br /> Matrix: Water <br /> l.. <br /> I. QUALfTY ASSURANCE SUMMARY <br /> All data is of known and acceptable quality except for EPA Method 8010/8020 results <br /> on the Trip Blank which is rejected and flagged(R). <br /> ANALYTICAL METHODS <br /> ( Parameter Technique Method Lab <br /> f .. <br /> f . <br /> Volatile organic compounds GCIELCD,GCIPID EPA 8010/8020 ATI -Renton <br /> Phenols GC/FID EPA 8040 ATI - San Diego <br /> Metals AA/GF, AA/F EPA 7000 Series ATI -Renton <br /> ICAP EPA 6010 ATI - Renton <br /> Moisture Gravimetric Method 7-2.2 ATl - Renton <br /> I <br /> TIMELINESS Time Time <br /> Date Date Date Till Till <br /> Parameter Sampled Extracted Analyzed Extraction Analysis <br /> � t <br /> Volatile organic compounds 06/01/90 WA 06/12/90 NIA 11 (14) <br /> Phenols 06/01/90 06107/90 06/13/90 6 (7) 12 (40) <br /> Metals 06/01/90 NIR 07/03/90 N/R 32 (180) <br /> L N/A - Not Applicable <br /> tf N/R - Not reported <br /> The report date has been used to verity the holding times for metals. <br /> f Numbers in parenthesis()indicate recommended holding times for water. <br /> All samples were extracted and analyzed within recommended holding times for water. <br /> FIELD QUALrrY CONTROL SAMPLES <br /> Feld Duplicates: None were collected <br /> Rinsate: None collected <br /> l <br /> Trip Blank: The ethylbenzene,tolulene, and total xylenes detections, are related <br /> to residual contamination in the purge tuce. The trip blank results, having <br /> i <br /> no relationship to the results on Samples PIN-1, PW-2, and MW-3 is rejected <br /> and flagged(R). <br /> LAB QUALITY CONTROL SAMPLES <br /> Reagent Blank: No contamination was present. <br /> Matrix Spikes: The matrix spike/matrix spike duplicate% recoveries. and RPD data are witrnn ATI <br /> control limit criteria for following methods: <br /> EPA 8010/8020 EPA 7000 Series <br /> EPA 8040 EPA 6010 <br /> Surrogates: The surrogate recoveries are acceptable and fail within ATI control limas <br /> ffor EPA Method 8010/8020. <br /> L ' <br />