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I <br />' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate #2079 Fax (209) 394-1507 <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 12-11-98 <br /> Attn Tim Cuellar Lab Numbers 1897-1 W, 2W, 3W, 4W, 5W Reported 12-21-98 <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH STEX DISTINCTION <br /> tANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-1/ MW-2/ MW-31 MW-4/ MW-51 <br /> 12-798 12-7-98 12-7-98 12-7-98 12-7-98 <br /> (ug/L) (ug/L) (uglL) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND ND ND 63 <br /> BENZENE 050 3800 8800 13000 1900 ND <br /> TOLUENE 050 1200 450 5500 61 ND <br /> ETHYL BENZENE 050 560 890 1700 240 ND <br /> TOTAL XYLENES 050 1100 760 6500 140 ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 21000 21000 56000 9900 ND <br /> Report Limit Multiplication Factor 200 200 500 100 1 <br /> Surrogate % Recovery FID 103%!PID 100% FID 104%7 RO a9 4% FiD 103%1 PID 102% FID 117%1 PID 105% FID 95 7%1 PID 95 9% <br /> Instrument ID VAR-GCI 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 /> Clary J Cone Zanleillips <br /> Environmental Lab Director <br /> I <br />