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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 GeoEnvrronmental Inc Client Project ID Pacific Car Wash Sampled 08-14-02 <br />' of Northern California Reference Number 4974 Received 08-15-02 <br /> 837 Shaw Road Sample Description Water Extracted 08-21-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015,8020 Analyzed 08-21-02 <br /> Attn Tim Cuellar Lab Numbers 4974-1W 2W,3W,4W,5W Reported 08-28-02 <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 1 MW 2 MW 3 MW 4 MW 5 <br /> 08-14-02 08-14-02 08-14-02 08-14-02 08-14-02 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 450 NO NO NO NO <br /> BENZENE 050 9900 420 1100 NO NO <br />' TOLUENE 050 720 1900 1400 NO ND <br /> ETHYL BENZENE 050 630 3200 2800 NO ND <br /> lie TOTAL XYLENES 050 3000 18000 13000 NO NO <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 42000 98000 67000 NO NO <br /> Report Limit Multiplication Factor 500 200 100 1 1 <br /> I <br /> Surrogate%Recovery FID 991%1 PID 97816 RD 112%7PID 19i% FID 11MIRD 997;6 FID 937%fP1D 982% FID 927%lPID 965% <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 /> 0 <br /> C�� <br /> ANALYST APPROVED BY <br /> Clan J Cone J es C Phillips <br /> aboratory Director <br /> 1 <br />