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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) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Nomelhni Sampled 6-28-99 <br /> of Northern California Reference Number 2343 Received 7-1-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 7-2-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030180158, 8020 Analyzed 7-2-99 <br /> Am Tim Cuellar Lab Numbers 2343-6W, 7W, 8W, 9W Reported 7-12-99 <br /> I <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-21 MW-31 MW-11 MW-7! <br /> 628-99 6-28-99 628-99 6-28-99 <br /> lug/L) (uglL) (ug1L) (ug/L) (ug/L) <br /> MTBE 0 50 200 ND 62 ND <br /> IBENZENE 050 8900 11000 1200 1400 <br /> TOLUENE 0 50 190 3800 290 160 <br /> ETHYL BENZENE 050 710 1500 140 490 <br /> TOTAL XYLENES 050 390 3800 310 520 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 20000 52000 6500 10000 <br /> Report Limit Multiplication Factor 200 500 50 50 <br /> I <br /> I <br /> Surrogate % Recovery FID 97 3%1 PID 94 7% RD 109%1 PID 99 2% FID 102%!PID 99<% FID 113%f PID 102% <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 /> (2 ANALYST APPROVED 8Y / <br /> C/a r J one Ja s C Phrlllps <br /> nvrronmental Lab Director <br /> I <br />