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' CASTLE. E 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 Cal Fuels Sampled 7 17-97 <br /> of Northern California Reference Number 1193 Received 718-97 <br /> 1803 West March Lane, Suite A Sample Description Water Extracted 7-21 97 <br /> Stockton, CA 95207 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 7 21-97 <br />' Am Tim Cuellar Lab Numbers 1193-7W, 8W, 9W, 1 O Reported 728 97 <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-617-17 97 MW 717 17-97 MW 817-17-97 MW 917-17-97 <br />' {ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 0 50 ND ND ND ND <br /> BENZENE 0 50 5800 ND ND 300 <br /> TOLUENE 0 50 ND ND ND ND <br />'• ETHYL BENZENE 050 950 ND ND 6 9 <br /> TOTAL XYLENES 050 1300 ND ND ND <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 44000 ND 110 830 <br /> Report Limit Multiplication Factor 200 1 1 10 <br /> Surrogate % Recovery FID 109%/PID 105% FID 104%1 PID 104% FID 102%1 PID 992% FID 114%1 PIO 108% <br /> Instrument ID VAR GC1 VAR GC1 VAR-GC1 VAR GC1 — <br /> I 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 /> f <br /> ANALYST APPROVED BY <br /> Clair J Cone Ames C P6'1/' s <br /> Env,ronmenia!Lab Director <br />