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t CASTLE ANALYTICAL LABORATORY <br /> t Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvirormental Inc Client Project ID Rainwater Car Wash Sampled 06-22-04 <br /> ' of Northern CaVorma Reference Number 7092 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 06-25-04 <br /> Stockton CA 95215 Sample PreplAnalysis Method EPA 5030/8015 8020 Analyzed 06-25-04 <br /> Attn Tim Cuellar Lab Numbers 7092-16W 17W 18W 19W 20W Reported 07-07-04 <br /> 1 <br /> ' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> tANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 11D MW 11 E MW 11 F MW 13A MW 13B <br /> 062204 062204 062204 062204 062204 <br /> ' (ug/L) (uglL) (ug/L) (ug/L) (ug1L) (ug1L) <br /> MTBE 050 098 ND ND ND 079 <br /> BENZENE 050 ND ND ND ND ND <br /> TOLUENE 050 ND ND ND ND ND <br /> ' ETHYL BENZENE 050 ND ND ND ND ND <br /> TOTAL XYLENES 050 ND ND NO ND ND <br /> ' GASOLINE RANGE <br /> HYDROCARBONS 50 88' ND ND ND ND <br /> ' Report Limit Multiplication Factor 1 1 1 1 1 <br /> 1 <br /> `17on-gasoline pattern gasoline value due mainly to tetrachloroethene PCE), see EPA 8260 analysis <br /> ' Surrogate%Recovery FID 967%1 PID 100% FID 974A 1 PID 11a% FIE)96 9%1 PID 106% FIE)98 9%1 PID 104% FID 946%1 PED 971A <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 /> 1 <br /> 0 APPROVED BY APPROVED BY ( r <br /> ' Clair J Cone J es C Phillips <br /> Laboratory Manager aboratory Director <br /> 0 <br />