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t 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 /> Advanced GeoEnvironmental, Inc Client Project ID Rainwater Car Wash Sampled 06-06-02 <br /> ' of Northern California Reference Number 4756 Received 06-07-02 <br /> 837 Shaw Road Sample Description Water Extracted 06-09-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method EPA 5030/8015,8020 Analyzed 06-09-02 <br /> Attn Tim Cuellar Lab Numbers 4756-1W 2W, 3W Reported 06-17-02 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> ' WITH BTEX DISTINCTION <br /> ' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> Effluent GAC-2 Influent <br /> (ug/L.) (ug/L) (ug/L) (ug/L) <br /> ' MTBE 050 ND ND 16000 <br /> BENZENE 050 NO NO 660 <br /> ' TOLUENE 050 NO NO 1400 <br /> ETHYLBENZENE 050 ND NO 170 <br /> ' TOTAL XYLENES 050 ND ND 980 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 NO NO 13000 <br /> Report Limit Multiplication Factor 1 3 50 <br /> Report Limit Multiplication Factor for MTBE only 500 <br /> 1 <br /> ' Surrogate%Recovery FID 100%1PID 103% FID 107%/PID 110% FID 920%IPID w2% <br /> Instrument ID VAR-GC1 VAR-GC1 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 /> ANALYST ltl2� APPROVED BY <br /> ' Clan J Cane Jame C rPS <br /> rtory Drrec#or• <br /> l I I I r <br /> M1 ' i <br /> _ I 4 <br />