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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate #2079 Fax {209} 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Nomellini Construction Sampled 8-11-98 <br />' of Northern California Reference Number 1710 Received 8-14-98 <br /> 4005 North Wilson Way Sample Description Water Extracted 8-18-98 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 8-18-98 <br /> Attn Tim Cuellar Lab Numbers 1710-6W, 7W, 8W, 9W Reported 8-25-98 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOtINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-6/ MW-7/ MW-8/ MW-9/ <br /> 8-11-98 8-11-98 8-11-98 8-11-98 <br />' (ug/L) (ug/L) lug/L1 {ug/L) lug/L} <br /> MTBE 0 50 064 NO NO 078 <br />' BENZENE 0 50 ND 1400 ND NO <br /> TOLUENE 050 NO 210 NO ND <br /> ETHYLBENZENE 050 ND 570 ND ND <br /> TOTAL XYLENES 050 ND 970 NO ND <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 NO 17000 ND ND <br />' Report Limit Multiplication Factor 1 50 1 1 <br /> Surrogate % Recovery Fla 97 6%1 PID 97 4% FID 122%/KD 107% FID 101%1 PID 99 7% FID 99 9%7 RD 98 9% <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 B <br /> Clan J Cone ames C Phillips <br /> Envvonmenta1 Lab Director <br />