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' CASTLEANALYTICAL NA TICAL 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 Protect 1D Pacific Car Wash Sampled 3-27-01 <br /> I of Northern California Reference Number 3639 Received 3-28-01 <br /> 837 Shaw Road Sample Description Water Extracted 4-2-01 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 4-2-01 <br /> Attn Tim Cuellar Lab Numbers 3639-6W 7W,8W,9W, 10W Reported 4-6-01 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE 0 <br /> MW6 MW7 MW8 MW9 MW10A <br /> 3-27-01 3-27-01 3-27-01 3-27-01 3-27-01 <br /> (ug/L) (ug/L) (ug/L) (ug/L.) (ug/L) (ug/L) <br /> MTBE 050 NO 730 48 NO 84 <br /> BENZENE 050 2400 NO NO NO NO <br /> TOLUENE 050 9000 NO NO NO NO <br /> ETHYL BENZENE 050 2300 NO NO ND NO <br /> 0 TOTAL XYLENES 050 14000 NO NO NO NO <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 83000 820 ND NO 110 <br /> Report Limit Multiplication Factor 500 5 1 1 1 <br /> Report Limit Multiplication Factor MTBE only 50 <br /> Surrogate%Recovery FID 979%f RD 975% FID 963%l PID 946/. FID 891%1P1D 894% FID 904%l PID 897% RD 111%fPi6 939% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST 1 APPROVED BY <br /> Glair J Gone ,/ es C hrllrps <br /> aboratory Director <br /> I <br />