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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate 112079 Fax (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pacific Car Wash Sampled 10 15 98 <br /> of Northern California Reference Number 1808 Received 10 20-98 <br /> 4005 North Wilson Way Sample Description Water Extracted 10 21-98 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030=15, 8020 Analyzed 10 21-98 <br /> Attn Tim Cuellar Lab Numbers 1808-4W, 5W, 6W, 7W, SW Reported 10-27-98 <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-1/ MW-2/ MW-3/ MW-4/ MW-5/ <br /> 10-1998 10-19-98 10-19-98 10-19-98 10-1998 <br /> (ug1L) (ug1L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 860 ND ND 46 ND <br /> BENZENE 0 50 5500 ND 890 1 5 ND <br /> TOLUENE 0 50 9100 2100 1800 ND ND <br /> ETHYL BENZENE 0 50 1200 2800 700 ND ND <br /> TOTAL XYLENES 0 50 7200 16000 2500 ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 66000 93000 25000 160 ND <br /> Report Limit Multiplication Factor 1000 1000 100 1 1 <br /> Report Limit Multiplic <br /> Surrogate % Recovery FID 104%f PID 104% FID 102%1 PID 102% FID 107%I MO 1 D5% FID 97 0%f PID 96 7% F3A 99 9%f PID 99 6% <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 /> ANALYST APPROVED BY � <br /> Clan J Cone Js s C Phillips <br /> Environmental Lab Director <br />