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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone 1209) 384-2930 <br /> Certificate #2079 Fax 1209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Pacific Car Wash Sampled 11-24 97 <br /> E of Northern California Reference Number 1349 Received 11-26-97 <br /> 4005 North Wilson Way Sample Description Water Extracted 11-28-97 <br /> Stocktonr CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 11-28-97 <br /> Attn Tim Cuellar Lab Numbers 1349-11W, 2W,3W, 4W, 5W Reported 12-3-97 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE 1D <br /> MW 11 MW-2/ MW-31 MW-4/ MW-5/ <br /> 11 24-97 11-24-97 11-24-97 11-24-97 11-24-97 <br /> (ug/L) (ug/L) (ug/L) (ug/L) Jug/L) (ug/L) <br /> MTBE 050 1800 950 ND ND ND <br /> BENZENE 050 9700 10000 7200 94 1 3 <br /> TOLUENE 0 50 10000 21000 16000 450 2 5 <br /> ETHYL BENZENE 050 1600 3000 3000 54 ND <br /> TOTAL XYLENES 050 9700 17000 10000 340 1 9 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 95000 150000 120000 2500 ND <br /> Report Limit Multiplication Factor 1000 1000 1000 20 1 <br /> Surrogate % Recovery FID 100%1 PiD 99 8% FID 97 9%r Pio 96 e% FID 104%1 PID 102% FID 104%!Pip 102% FID 99 4%1 PID 98 9% <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 a s rlGps <br /> Environmental Lab Director <br />