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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 GeoEnv;ronmental Inc Client Project ID Pacific Car Wash Sampled 4-15 99 <br />' of Northern California Reference Number 2213 Received 4 20-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 4-22 99 <br /> Stockton CA 95205 Sample Prep/Analysis Method EPA 5030/8015 8020 Analyzed 4 22 99 <br /> Attn Tim Cuellar Lab Numbers 2213 1W, 2W 3W 4W 5W Reported 4-27 99 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> IWITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 11 MW-21 MW-31 MW 4/ MW 5/ <br /> 4-15 99 4-15 99 4 15 99 4-15 99 4-15-99 <br /> (ug&) Jug/L) (ug1L) (ug1L) (ug1L) (ug/Q <br /> MTBE 060 350 ND NO ND ND <br /> BENZENE 050 2800 440 620 5 1 072 <br /> TOLUENE 050 4300 3000 410 17 2 5 <br /> ETHYL BENZENE 050 850 2700 620 35 ND <br /> TOTAL XYLENES 050 4900 12000 600 16 2 0 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 40000 88000 13000 120 ND <br /> Report Limit Multiplication Factor 200 500 100 1 1 <br /> Surrogate % Recovery FID 105%1 P0104% FID 108%iPID 105% FID 108%i PID 104% FID 103%1 PID 101% FID 105%l PID 105% <br /> Pnstrument iD VAR GC1 VAR GC1 VAR GC1 VAR-GC1 VAR GC1 <br /> Analytes reported as ND were not detected or below the Practical Qudntltatlon Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> /1 <br /> ANALYST APPROVED BY <br /> Clary J Cone ,Mmes C Phillips <br /> /Envlronmenral Lab Drrecror <br />