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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 Sampled 3-29-98 <br /> of Northern California Reference Number 2162 Received 3 31-99 <br />' 4005 North Wilson Way Sample Description Water Extracted 4-1-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 4-1-99 <br /> Ann Tim Cuellar Lab Numbers 2162-1 W, 2W, 3W, 4W, 5W Reported 4 13-99 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> IWITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-8/ MW 9/ MW-5/ MW-6/ MW-7/ <br /> 3-29-99 3-29-99 3-29-99 3-29-99 3-29-99 <br />' (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) lug/L) <br /> MTBE 0 50 NO NO 32 1 2 ND <br />' BENZENE 0 50 NO ND NO NO 480 <br /> TOLUENE 050 NO NO NO ND 48 <br /> ETHYL BENZENE 050 ND NO NO NO 190 <br /> TOTAL XYLENES 050 ND NO NO ND 230 <br /> I GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND NO NO 4700 <br /> IReport Limit Multiplication Factor 1 1 1 1 50 <br /> ISurrogate % Recovery FID 93 7%f PID 94 2% FID 93 9%1 PID 94 1% FID 94 5%1 PID 94 9% FID 94 5%1 PID 94 9% FID 101%1 PID 97 0% <br /> Instrument ID VAR GC1 VAR-GC1 VAR-GC1 VAR GC1 VAR-GC1 <br />' Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST / X C�ti1/ tG'{,�� APPROVED BY <br /> Clan Cone J es C Phillips <br /> Environmental Lab Director <br />