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CASTLE ANALYTICAL LABORATORY <br /> lqw Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone: 12091 384-2930 <br /> Certificate #2079 <br /> Fax: (209) 384-1507 <br /> ' Advanced GeoEnvironmental, Inc. Client Project ID: Paiges Towing Sampled:4-12-99 <br /> of Northern California Reference Number: 2188 Received: 4-13-99 <br /> ' 4005 North Wilson Way Sample Description: Water Extracted: 4-19-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method: EPA 503018015, 8020 Analyzed: 4-19-99 <br /> Attn: Tim Cuellar Lab Numbers: 21$8-13W, 14W, 15W, 16W Reported:4-23-99 <br /> ' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-11 MW-21 MW-3l MW-4l <br /> 4-12-99 4-12-99 4-12-99 4-12-99 <br /> (ug/L) lug/L1 (uglL) Jug/L) (uglt) <br /> ' MTBE 0.50 ND 2.5 0.71 ND <br /> BENZENE 0.50 ND ND ND ND <br /> ' TOLUENE 0.50 ND ND ND ND <br /> ETHYL BENZENE 0.50 ND ND ND ND <br /> TOTAL XYLENES 0.50 ND ND ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND ND ND <br /> Report Limit Multiplication Factor: 1 1 1 1 <br /> Surrogate % Recovery: FID:90.6%r P0:90.7% f3D:90 1%!PID:89.8% FID:95.6%I P*:95.0% FID:94.6%i PID:93.6% <br /> Instrument 10: VAR-GC1 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 /> 1 <br /> ANALYST. APPROVED BY: <br /> Carr J. Cone Ja C. Phr rps <br /> ' vironmental Lab Director <br />