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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 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 503018015 8020 Analyzed 4 22-99 <br /> Attn Tim Cuellar Lab Numbers 2213-6W 7W, 8W, 9W 10W Reported 4-27-99 <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/ MW 10A/ <br /> 4-15 99 4-15-99 4-15 99 4-15 99 4-15-99 <br />' (ug/L) (uglL) (ug/L) (ug/L) (ug/L) (ug1L) <br /> MTBE 050 ND 31 63 ND ND <br /> BENZENE 0 50 2400 190 1 1 ND ND <br /> TOLUENE 050 7200 ND ND ND ND <br /> ETHYL BENZENE 0 50 1400 21 ND ND ND <br /> TOTAL XYLENES 050 7000 100 ND ND ND <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 50000 2700 410 ND ND <br />' Report Limit Multiplication Factor 200 10 2 1 1 <br /> Surrogate % Recovery FID 107%1 PID 104% F1D 126`161 Pro 111% FiD t04% PiD 102% FID 102%I PIR 101% FID es 1%r PID 95 a% <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 Quantnation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST f APPROVED BY <br /> Clan J Cone 'rhe C Phillips <br /> �vironmental Lab Director <br />