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t 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 05-23-04 <br /> ' of Northern California Reference Number 7093 Received 06-24-04 <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 7093-6W 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 76 MW 7C MW 7D MW 7E MW 7F <br /> 062304 062304 062304 062304 062304 <br /> ' (uglL) (uglL) (uglL) (uglL) (uglL) (uglL) <br /> MTBE 0 50 82 12 56 43 066 <br /> BENZENE 050 056 13 ND ND ND <br /> ' TOLUENE 0 50 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 50 140" 270' 270` 100` ND <br /> Report Llmrt Multiplication Factor 1 1 1 1 1 <br /> ' Report Limft Multiplication Factor for MTBE only 5 <br /> 1 <br /> `non- asohne pattem gasoline value due main!y to tetrachloroethene(RCE), see EPA 8260 analysis <br /> Surrogate% Recovery FID 992/.1 PID 440% FID 104%/PID 943% FID 111%IPID 100% FID 165%IPI❑ 105% FID 102%IPIC 102°x. <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 /> v <br />�-- -� APPROVED 8Y - -- - - -- - - - - - - - APPROVED BY <br /> Clair J Cone Ja es Phr!!rp <br /> Laboratory Manage L oratory Drrector <br /> 1 <br />