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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services P.O. Box 1360, Winton, CA. 95388 Phone: (209) 384-2930 <br /> ICertificate #2079 Fax: (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc. Client Project ID: Flag City Chevron Sampled: 7-19-96 <br /> I of Northern California Reference Number: 817 Received: 7-23.96 <br /> 1803 West March Lane, Suite A Sample Description: Water Extracted: 7-26-96 <br /> Stockton, CA 95207 Sample Prep/Analysis Method: 8015M, 8020 Analyzed: 7=26-96 <br /> Attn: Tim Cuellar Lab Numbers: 817-11W, 2W, 3W Reported: 7-31-96 <br /> TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-2 MW-1 MW-4 <br /> (ug/L) lug/L.) (ug1L) (ug/L) <br />' MTBE 0.50 310 3.7 0.74 <br /> BENZENE 0.50 NO NO ND <br /> TOLUENE 0.50 NO ND ND <br /> ETHYL BENZENE 0.50 NO NO NO <br /> TOTAL XYLENES 0.50 ND NO NO <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 NO NO ND <br /> Report Limit Multiplication Factor: 10 1 1 <br /> Surrogate % Recovery: FID-98.9%I PID-99.1% NO-97.6%I PID-98.0% FID-101%I PI0-100% <br /> Instrument ID: VAR-GC1 VAR-GC1 VAR-GCI <br />' Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> ANALYST: APPROVED BY: <br /> C J. one Ja es C. Phillips <br /> nvironmental Lab Director <br /> I <br />