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I <br />' CASTLE ANALYTICAL LABORATORY <br /> N <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 4 8-98 <br />' of Northern California Reference Number 1532 Received 4-10 98 <br /> 4005 North March Lane, Suite A Sample Description Water Extracted 4 13-98 <br /> Stockton CA 95207 Sample Prep/Analysis Method EPA 50308015, 8020 Analyzed 4 13-98 <br /> Attn Tim Cuellar Lab Numbers 1532-1 W 2W 3W, 4W 5W Reported 4 22-98 <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> IANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE 1D SAMPLE ID SAMPLE ID <br /> MW-11 MW-2/ MW 31 MW-4/ MW 51 <br /> 4-8-98 48-98 4-898 4-8-98 4-8-98 <br />' (ug/L) (ug/L) (uglL) {uglL) (ug/L) (ug/L) <br /> MTBE 050 ND ND ND ND ND <br /> BENZENE 0 50 620 6100 23000 6900 ND <br /> TOLUENE 050 ND 9600 19000 260 ND <br /> ETHYL BENZENE 050 200 1800 4200 810 NO <br /> TOTAL XYLENES 050 37 8500 19000 3100 NO <br /> IGASOLINE RANGE <br /> HYDROCARBONS 50 5000 74000 140000 25000 ND <br /> Report Limit Multiplication Factor 20 500 500 200 1 <br /> Surrogate % Recovery NA FID 78 9%I PID 95 0% FID 106%1 PID 103% NA FID 103%I PID 103% <br /> Instrument ID VAR-GC1 VAR GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Llmrt <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ry�I� 9 <br /> �_ <br /> ANALYST �' �� �` ��...,� APPROVED BY I <br /> Clams Cone �Y Jes Phillips <br /> Environmental Lab Director <br /> I <br />