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i <br /> 1 <br /> CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95301 Phone 12091 384-2930 <br /> Certificate #2079 Fax 12091 384-1507 <br /> Advanced Geo Environmental, Inc Client Project 1D Cal Fuels Sampled 7-17-98 <br /> of Northern California Reference Number 1677 Received 7-21-98 <br /> 4005 North Wilson Way Sample Description Water Extracted 7-27-98 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 7-27-98 <br /> AM Tim Cuellar Lab Numbers 1677-6W, 7W, 8W, 9W, 10W Reported 7-29-98 <br /> I TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> IANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE 1D <br /> MW-6/ MW-7/ MW-8/ MW-9l MW-101 <br /> I 7-17-98 7-17-98 7-17-98 7-17-98 7-1798 <br /> (ug/L) lug/L) (ug1L) lug/L1 (ug/U (ug/U <br /> MTBE 050 ND ND ND NO ND <br /> IBENZENE 050 750 NO NO 27 ND <br /> I� TOLUENE 0 50 ND NO 067 1 7 ND <br /> ETHYL BENZENE 050 160 ND ND 058 ND <br /> I TOTAL XYLENES 050 NO ND 064 1 0 NO <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 7800 ND 72 320 ND <br /> Report Limit Multiplication Factor 50 1 1 1 1 <br /> I <br /> I <br /> 1 <br />■ Surrogate % Recovery FID 105%1 PID 102% FID 92 4%1 PID 96 5% FID 99 3%/M 103% FID 105%1 PID 101% FID 92 5%1 PID 97 3% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 VAR-GC1 <br /> IAnalytes reported as ND were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> I <br /> ANALYST (/w APPROVED BY <br /> I Clarr,J Con Ja s �Ikps <br /> vfronmental Cab Director <br /> I <br />