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1 <br /> 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 Geo Environmental, Inc Client Project ID Nomellini Construction Sampled 5 14-97 <br />' of Northern California Reference Number 1121 Received 5-18 97 <br /> 1803 West March Lane, Suite A Sample Description Water Extracted 5-20 97 <br /> Stockton, CA 95207 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 5-20-97 <br /> Attn Tim Cuellar Lab Numbers 1121-1W, 2W, 3W, 4W, 5W Reported 5-27 97 <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' 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 /> (ug/L) fug/L) (ug/L) (ug1L) (ug/L) (uglL) <br />' MTBE 050 ND ND ND ND 6 0 <br />' BENZENE 0 50 5800 6200 8500 4500 ND <br /> TOLUENE 050 2000 110 3600 ND ND <br /> ETHYL BENZENE 050 720 430 1500 630 ND <br /> TOTAL XYLENES 0 50 1500 130 3400 220 ND <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 35000 15000 55000 14000 ND <br />' Report Limit Multiplication Factor 200 200 200 100 1 <br /> I <br /> I Surrogate % Recovery FID 103%l P1D 999% FID 100%/PID 9&3.6 FID 104%/PID 999% FI0107%1 NO 1014% FID 995%l PID 101% <br /> Instrument ID VAR-GC1 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 /> la'lt <br /> /, <br /> ANALYSTAPPROVED BY <br /> C f J Cone mer C Phillips <br /> Environmental Lab Director <br />