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. 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 Cal Fuel's Sampled 10-16-97 <br />' of Northern California Reference Number 1293 Received 10-17-97 <br /> 1803 West March Lane Suite A Sample Description Water Extracted 10 20-97 <br /> Stockton CA 95207 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 10-20-97 <br />' Attn TIm Cuellar Lab Numbers 1293-6W, 7W 8W, 9W, 1 O Reported 10-27-97 <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-6/ MW-7/ MW-81 MW-9/ VW-11 <br />' <br /> 1016-97 10-16-97 10-16-97 10-16-97 10-16-97 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND ND ND ND ND <br />' BENZENE 0 50 2400 ND ND 190 18000 <br /> TOLUENE 050 ND 22 ND ND 52000 <br /> ETHYL BENZENE 050 430 ND ND ND 4100 <br /> TOTAL XYLENES 050 ND 093 ND ND 20000 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 14000 ND 86 620 250000 <br /> Report Limit Multiplication Factor 200 1 1 10 2000 <br /> Surrogate % Recovery FID 109%1 PI6 1p5% FID 102%1 Pin 101% FID 106%1 PID 105% FID 113%/Pin 110% FID 98 4%1 Pin 97 5% <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 /> ry <br /> ANALYST APPROVED BY L <br /> Clair J Cane me C Phillips <br /> Environmental Lab Director <br />