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1 <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 /> Advanced GeoEnvironmental, Inc Client Project ID Rainwater Car Wash Sampled 06-22-04 <br /> ' of Northern California Reference Number 7092 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 06-25-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015,8020 Analyzed 06-25-04 <br /> Attn Tun Cuellar Lab Numbers 7092-21W, 22W,23W, 24W Reported 07-07-04 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> ' WITH BTEX DISTINCTION <br /> ' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE 1D <br /> MW 13C MW 13D MW 13E MW 13F <br /> 062204 062204 062204 062204 <br /> ' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 450 ND ND ND ND <br /> ' BENZENE 050 ND ND ND ND <br /> TOLUENE 050 ND ND ND ND <br /> ' ETHYL BENZENE 050 ND ND ND ND <br /> TOTAL XYLENES 050 ND ND ND ND <br /> ' GASOLINE RANGE <br /> HYDROCARBONS 50 52" ND ND ND <br /> ' Report Limit Multiplication Factor 1 1 1 1 <br /> non-gasoline pattern gasoline value due main!Z to tetrachloroethene(PCE), see FPA 8260 analysis <br /> ' Surrogate % Recovery FID 1036!PID 98 t% FID 104 Al PID 9996 FID 103%f PID 998% FID 104%/PID 998/ <br /> Instrument ID 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 /> r� <br /> ' APPROVED BY 4,1 APPROVEDBY drnrq <br /> Clan J Cone <br /> JymiKC fI rips <br /> Laboratory Manager Laboratory Director <br /> 1 <br />