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. CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301- Phone: (209)3842930 <br /> ' <br /> Certificate No.2480 Fax: (209)384-1507 <br />! <br /> Advanced GeoEnvironmental, Inc. Client Project ID:Grewals Market Sampled:See Below <br /> ' of Northern California Reference Number:4392 Received:01-29-02 <br /> 837 Shaw Road Sample Description:Water Extracted:01-30-02 <br /> r Stockton, CA 95215 Sample Prep/Analysis Method: EPA 503018015,8020 Analyzed:01-30-02 <br />'r Attn:Tim Cuellar Lab Numbers:4392-8W, 14W, 21W Reported:02-08.02 <br />� 1f <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE iQ <br /> P-10/H2O P-11 1 H2O P-121 H2O <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> ' MTBE 0.50 NO 4.4 12 <br /> BENZENE 0.50 1.0 NO 2.2 <br /> ' TOLUENE 0,50 NO 1.8 1.2 <br /> ETHYL BENZENE 0.50 NO 1.2 ND <br /> TOTAL XYLENES 0.50 1.5 4.2 47 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 350 NO 510 <br /> Report Limit Multiplication Factor; 1 1 1 <br /> ' Date Sampled: 01-24-02 01-24-02 01-23-02 <br />' Surrogate% Recovery: F1D:109%t RD:103% FID:93.9%1PID:91.9% F10:262%1 PID:153% <br /> Instrument ID: 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 /> . ANALYST: APPROVED BY: <br /> Clan J. Cone JampfiC. Hlips <br /> La ratory Director <br />