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t CASTLE ANALYTICAL LABORATORY <br /> Envirorsmental Testing Services 2333 Shuttle Drive Atwater CA 95301 Phone (209)384-2930 <br />' Certificate No 2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pacific Car Wash Sampled 12-31-01 <br />' of Northern California Reference Number 4327 Received 01-03-02 <br /> 837 Shaw Road Sample Description Water Extracted 01-03-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015,8020 Analyzed 01-03-02 <br /> Attn Tim Cuellar Lab Numbers 4327-6W, 7W, 8W 9W, 10W Reported 01-14-02 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE 1D SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 6 MW 7 MW$ MW 9 MW 10A <br /> 123101 123101 123101 123101 123101 <br /> 1 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 1800 940 71 15 110 <br /> BENZENE 050 940 ND ND 15 ND <br />' TOLUENE 050 4500 NO NO 055 NO <br /> ETHYL BENZENE 010 2400 NO ND 73 ND <br /> TOTALXYLENES 050 15000 NO NO 15 ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 73000 1200 ND 600 150 <br /> Report Limit Multiplication Factor 500 5 1 1 1 <br /> Report Limit Multiplication Factor for MTBE only 50 5 <br /> 1 <br /> Surrogate% Recovery FID 102%/PID 1039E FID 111%1PID 109% FID 104%/PID 102% FID 296%1 PID 164% FID 112%1RD 106% <br /> Instrument ID VAR-GCI VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Anaiytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantdatlon Limit=Reporting Limit x Re ort Limit Multiplication Factor <br /> I ANALYST APPROVED BY <br /> Clan J Cone Jq#&S C Phi fps <br /> laboratory Director <br />