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1 <br /> ' CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive Atwater, CA 95301 Phone (209)384-2930 <br /> ' Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental jnc Client Project ID Rainwater Car Wash Sampled 06-23-04 <br /> ' of Northern California Reference Number 7093 Received 06-24-04 <br /> 837 Shaw Road Sample Description Water Extracted 06-28 04 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 5030/8015,8020 Analyzed 06 28-04 <br /> Attn Tim Cuellar Lab Numbers 7093-1W 2W, 3W 4W 5W Reported 07 0/-04 <br /> 1 <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-5 MW 7A <br /> 062304 062304 062304 062304 062304 <br /> t (uglL) (uglL) (uglL) (ug/L) (ug/L) (ug1L) <br /> MTBE 050 4100 36000 7200 ND 24 <br /> BENZENE 050 33 200 54 NO 10 <br /> ' TOLUENE 050 ND 980 ND ND ND <br /> ETHYL BENZENE 050 ND 270 ND ND ND <br /> ' TOTAL XYLENES 060 42 1500 ND ND ND <br /> GASOLINE RANGE <br /> ' HYDROCARBONS 50 1200 15000 1800 ND ND <br /> ' Report Limit Multiplication Factor 5 50 10 1 1 <br /> Report Limit Multipircation Factor for MTBE only 250 1000 200 <br /> I ' <br /> 1 <br /> ' Surrogate % Recovery FID 106hf PID 100A FID 1017 IPID 974/ FID 927%]PID 924% FID 101%/PID 992% FID 9921/PID 96 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 /> Practicak Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> APPROVED BY� APPROVED BY - <br /> ' Clan J Cone Ja s C Phillips <br /> Laboratory Man ger La oratory Director <br />