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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 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 Tim Cuellar Lab Numbers 7092-6W, 7W, 8W, 9W, 10W Reported 07-07-04 <br /> ' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 12F MW 10A MW 10B MW 10C MW 1O <br /> 062204 062204 062204 062204 062204 <br /> (ug/L) (uglL) (ug1L) (uglL) (uglL) (ug/L) <br /> MTBE 0 50 ND NO ND ND NO <br /> BENZENE 050 ND NO ND ND ND <br /> TOLUENE 0 50 ND NO ND ND NO <br /> ' ETHYL BENZENE 051 ND NO ND NO ND <br /> TOTAL XYLENES 050 ND NO ND NO ND <br /> ' GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND 440" 270' 77' <br /> Report Limit Multiplication Factor 1 1 1 1 1 <br /> i <br /> "non-gasoline pattern gasoline value due mainly to tetrachloroethene(PCF) see EPA 8260 analysis <br /> ' Surrogate%Recovery FID 94 97/RID 10216 FID 97 0%1 PID 101A FIP 97755 r Pit)B63% FID MAIM)934% PID 951/1PID 1271 <br /> Instrument 0 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> ' Analytes reported as ND were not detected or below the Practical Quantitaticn Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> (Y,APPROVED BY APPROVED BY <br /> ' Clair J Cone Ja es C Phillips <br /> Laboratory Manager L boratory Director <br />