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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate 112079 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Nomellini Construction Sampled 12-7-98 <br /> of Northern California Reference Number 1897 Received 12-9-98 <br /> 4005 North Wilson Way Sample Description Water Extracted 12-11-98 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 12-11-96 <br /> Attn Tim Cuellar Lab Numbers 1897-6W, 7W, 8W, 9W Reported 12-21-98 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-8/ MW-7/ MW-8/ MW-9/ <br /> 127-98 12-7-98 12-7-98 12 7-98 <br />' fug/Li (ug1L) (ug/L) (ug/L) (ug/L) <br /> MTBE 0 50 ND ND ND ND <br />' BENZENE 050 ND 900 ND ND <br /> TOLUENE 050 ND 130 ND ND <br /> ETHYL BENZENE 050 NO 430 ND ND <br /> TOTAL XYLENES 050 ND 710 ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND 13000 ND ND <br />' Report Limit Multiplication Factor 1 50 1 1 <br /> Surrogate % Recovery FID 99 3%1 PO 99 9% RD 123%1 PID 107% FID 95 4%1 PID 94 9% FO 99 4%I PID 99 5% <br /> Instrument ID 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 /> I <br /> ANALYST APPROVED BY <br /> Garr J Conees C Phillips <br /> Environmental Lab Director <br />