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I <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> 7 <br /> Advanced GeoEnwronmental, Inc Client Project ID Rainwater Car Wash Sampled 02-24-03 <br /> of Northern California Reference Number 5494 Received 02-25-03 <br /> 837 Shaw Road Sample Description Water Extracted 02-25-03 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8015,8020 Analyzed 02-25-03 ! <br /> Attn Tim Cuellar Lab Numbers 5494-1W 2W,3W Reported 03-05-03 <br /> 11 I� <br /> �J <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> I� <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> Influent Effluent GAC-2 <br /> 02-24-03 02-24-03 02-24-03 <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 5000 ND 53 <br /> BENZENE 050 170 ND ND <br /> TOLUENE 050 16 ND ND <br /> f ETHYLBENZENE 050 ND ND ND <br /> - � <br /> TOTAL XYLENES 050 480 ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 4000 ND ND <br /> 4 <br /> Report Limit Multiplication Factor 5 1 1 <br /> Report Limit Multiplication Factor for MTBE only 500 i <br /> �J ISI <br /> 1 <br /> u <br /> �J <br /> Surrogate%Recovery Fin 113%fPID tux F10 105%1PIQ 109x FID 103%/PID tOT% <br /> IJInstrument ID VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analyies reported as ND were not detected or below the Practical Quantitation Limit I <br /> II , Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> IJANALYST WI/ APPROVED BY <br /> ft6n J Cone a Phrlhps <br /> Laboratory Director <br /> i <br />