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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 06-22-04 <br /> ' of Northern Calrfornla Reference Number 7092 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 06-25-04 <br /> Stockton CA 95215 Sample PreplAnajysis Method EPA 5030/8015 8020 Analyzed 06-25-04 <br /> Attn Tim Cuellar Lab Numbers 7092-11W, 12W, 13VV 14W 15W Reported 07-07-04 <br /> 1 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> tWITH BTEX DISTINCTION <br /> ' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 10E MW 10F MW 11A MW 11B MW 11C <br /> 062204 062204 062204 062204 062204 <br /> ' (uglL) (ug/L) (uglL) (uglL) (ug/L) (uglL) <br /> MTBE 050 ND ND ND 27 59 <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 ND ND ND <br /> ' GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND ND ND 150* <br /> ' Report Limit Multiplication Factor 1 1 1 1 1 <br /> 1 <br /> 'non-gasoline pattem, gasoline value due mainly to tetrachloroethene(PCE), see EPA 8260 analysis <br /> ' Surrogate%Recovery FID 95g%: PID 127/. FID 999%1PID 123% FID 950.61PID 113A FID 966%1PI0 994% Fm 96 4%1 PI0 963A <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GCI 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 /> 0 APPROVED BY &A APPROVED BY <br /> ' Clan J Cone Jarles C Phillips <br /> Laboratory Manag r I-qLoratory Director <br /> 1 <br />