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1 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 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 50308015,8020 Analyzed 08-21-02 <br /> Attn Tim Cuellar Lab Numbers 4974-11W Reported 08-28-02 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID <br /> MW 10B <br /> 08-14-02 <br />' (ug/L) (uglL) <br /> MTBE 050 81 <br /> BENZENE 050 ND <br /> TOLUENE 050 ND <br /> ETHYL BENZENE 050 ND <br /> 0 TOTAL XYLENES 050 ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND <br /> IReport Limit Multiplication Factor 1 <br /> I <br /> Surrogate% Recovery F14 931%1 Plo 982% <br /> IInstrument ID VAR-GC1 <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> IPractical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> i <br /> I ANALYSTAPPROVED BY <br /> Gtarr J Cone ;Ja a 4:�PdhRlq,s <br /> aboratory Director <br />