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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate#2079 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Protect ID Pacific Car Wash Sampled 12-1-00 <br /> of Northern California Reference Number 3355 Received 12-5-00 <br /> 4005 North Wilson Way Sample Description Water Extracted 12-5-00 <br /> Stockton CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 12-5-00 <br /> Attn Tim Cuellar Lab Numbers 3355-6W,7W,8W,9W, 10W Reported 12-11-00 <br /> TOTAL. PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE 117 SAMPLE ID <br /> MW 6 MW 7 MW 8 MW 9 MW 10A <br /> 12-1-00 12-1-00 12-1-00 12-1-00 12-1-00 <br /> (ug/L) (u9/L) (u9/L) (u5/L) (u9/L) (u9/L) <br /> MTBE 050 N0 52 61 NO ND <br /> BENZENE 050 1400 110 NO NO ND <br /> TOLUENE 050 2100 ND ND NO ND <br /> . ETHYL BENZENE 050 1100 70 ND NO ND <br /> TOTAL XYLENES 050 5700 230 ND NO ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 49000 2200 NO ND ND <br /> Report Limit Multiplication Factor 500 5 1 1 1 <br /> Report Limit Multiplication Factor MTBE only 5 <br /> Surrogate%Recovery FID 993%1 PID 974% FID 142%1PI0 125% FID 945%1 PID 962% FID 1DZ%1PID 105% FID 973%/PID 994% <br /> instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GCI VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> i <br /> ANALYST APPROVED BYC/ ' <br /> C J one Jap"es hrllrps <br /> Lab Director <br />