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1 <br /> i <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 Protect ID Rainwater Car Wash Sampled 06-23-04 <br /> ' of Northern California Reference Number 7093 Received 06-24-C4 <br /> 837 Shaw Road Sample Description Water Extracted 06 28-04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 06-28-04 <br /> Attn Tim Cuellar Lab Numbers 7093-11W 12W 13W, 14W 15W Reported 07-07-04 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> ' WITH BTEX DISTINCTION <br /> i <br /> ' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE 10 SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 4 MW 8A MW 813 MW 8C MW 8D <br /> 062304 062304 062304 062304 062304 <br /> (uglL) (ug/L) (uglL) (ug/L) (uglL) (uglL) <br /> MTSE 050 1 5 44 17 14 ND <br /> BENZENE 0 50 076 ND NO ND NO <br /> TOLUENE 050 NO ND ND ND ND <br /> I <br /> ETHYL BENZENE 050 NO ND NO ND ND <br /> ' TOTAL XYLENES 050 ND ND ND ND NO <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 350" NO 320' 310' 240* <br /> ' Report Lmit MuIGplicaUon Factor 1 1 1 1 1 <br /> "non-gasoline pattein gasoline value due mainly to tetrachloroethene PCE), see EPA 8260 analysts <br /> Surrogate%Recovery FID 106h1PID 975% FID 101%IPID 126% FID 992%/PID B96/o FID 99061PID 996% FID 102%1PID 123/ <br /> Instrument ID VAR-GC1 VAR-GC1 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 /> 1 _ _ <br />----� APPROVED BY - - - —-- — - - — - - - APPROVED SY - <br /> ' Clan J Cone Jams C Phillips <br /> Laboratory Mana r La ratory Director <br />