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' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate#1-2480 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental Inc Client Protect ID Top Filling Sampled 12-11-01 <br /> of Northern California Reference Number 4275 Received 12-12-01 <br /> 837 Shaw Road Sample Description Water Extracted 12-13-01 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 12-13-01 <br /> Attn Tim Cuellar Lab Plumbers 4275-1W,2W, 3W,4W 5W Reported 12-23-01 <br /> I TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> I ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 1 MW 2 MW 3 MW 4 MW 5 <br /> 121101 121101 121101 121101 121101 <br />' (uglL) (uglL) (ug/L) (ug/L) (uglL) (ug/L) <br /> MTBE 050 NO NO 180 NO ND <br /> BENZENE 050 ND 660 5900 ND 28 <br /> TOLUENE 050 NO 89 550 NO ND <br />�. ETHYL BENZENE 0 50 ND 59 500 NO 250 <br /> TOTAL XYLENES 0 50 NO 240 1100 NO 400 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 ND 2000 18000 NO 3100 <br />' Report Limit Multiplication Factor 1 20 200 1 10 <br /> I <br /> Surrogate% Recovery FID 995%7PID 98 BSL 'rip 111%lPlp 19855 FIO 103%tPID 141% FID 105%/M 108% FID 154%lPID 174% <br />' Instrument ID VAR-GCI VAR-GCI 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 /> `J <br />' ANALYST APPROVED BY C'�' <br /> Clary J Cone J es A 1111ps <br /> aharatory Director <br />