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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 GeoEnvironmental, Inc. Client Project ID:Grewals Market Sampled:07-12-02 <br />' of Northern California Reference Number:4868 Received:07-16-02 <br /> 837 Shaw Road Sample Description:Water Extracted:07-18-02 <br /> Stockton,CA 95215 Sample Prep/Analysis Method:EPA 503018015, 8020 Analyzed:07-18-02 <br /> Attn:Tim Cuellar Lab Numbers:4868-1W,2W, 3W,4W Reported:07-23-02 <br /> TOTAL PETROLEUM HYDROCARBONS-GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW MW2 MW MW4 <br /> 07-12-02 07-12-02 07-12-02 07-12-02 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 0.50 0.92 21 ND ND <br /> BENZENE 0.50 NO 1.5 NO NO <br />' TOLUENE 0.50 ND ND ND ND <br /> ETHYL BENZENE 0.50 ND 4.3 NO NO <br />' . TOTAL XYLENES 0.50 ND 7.4 ND ND <br /> GASOLINE RANGE <br />' HYDROCARBONS 50 NO 200 ND NO <br /> Report Limit Multiplication Factor: 1 1 1 1 <br />' Surrogate° <br /> /o Recovery: FID:98,0%lPTO:104°5 FID:10595l PID.99.3!5 Pop;94.6951pID:1Q2'S FID:91.8%fPID:96A°h <br /> Instrument ID: VAR-GC1 VAR-GCI 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 /> ANALYST: 4APPROVED BY: <br /> -- g/ <br /> Clavi J. C ne Jams ,prunips <br /> oratory Director <br /> 1 <br />