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CASTLE ANALYTICAL LABORATORY <br /> 1 Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate #2079 Fax {209) 384-1507 <br /> F F <br /> Advanced GeoEnvironmental Inc Client Project ID Pacific Car Wash Sampled 7-29-99 <br /> of Northern California Reference Number 2402 Received 7-30-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 8-5-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 8-5 99 <br /> Ann Tim Cuellar Lab Numbers 2402-6W, 7W, 8W, 9W, 10W Reported 8-10-99 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 8/ MW-4/ MW-5/ MW-10B/ MW-10A/ <br /> 7-29 99 7-29-99 729-99 7-29-99 7-29-99 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 21 10 ND ND ND <br />' BENZENE 050 NO ND NO ND ND <br /> TOLUENE 050 NO ND ND NO NO <br /> ETHYL BENZENE 050 ND ND NO ND ND <br /> TOTAL XYLENES 0 50 NO NO ND 067 NO <br /> iGASOLINE RANGE <br /> HYDROCARBONS 50 NO NO ND NO ND <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> Surrogate % Recovery FID 97 2%1 PID 97 2% FID 95 fi%1 PID 95 5% FID 99 a%1 Plb 99 B% FID 95 2%1 PID 95 7% FID 97 D%!PID 95 3% <br /> Instrument ID VAR GC1 VAR-GC1 VAR GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST {/lI(, APPROVED BY <br /> Clary J Cone Ja es C Phrlhps <br /> nvlronmenra/Lab Dlrecror <br /> i <br />