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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, Inc Client Project ID Cal-Fuels Sampled 12-30-02 <br /> I of Northern California Reference Number 5354 Received 12-31-02 <br /> 837 Shaw Road Sample Description Water Extracted 01-02-03 <br /> Stockton, CA 95215 Sample Prep/Analysis Method EPA 5030/8015,8020 Analyzed 01-02-03 <br /> Attn Tim Cuellar Lab Numbers 5354-1 W,2W,3W,4W,511V Reported 01-06-03 <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-4 MW-5 MW-7 MW-8 MW-9 <br /> 12-30-02 12-30-02 12-30-02 12-30-02 12-30-02 <br /> I (ug/L) (ug/L) (ug/L) (uglL) (ug/L) (uglL) <br /> MTBE 050 ND 11 ND ND ND <br /> BENZENE 050 1900 ND ND ND ND <br /> TOLUENE 050 61 ND ND ND ND <br /> ETHYLBENZENE 050 2300 ND ND ND ND <br /> TOTAL XYLENES 050 4000 ND ND ND ND <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 40000 ND ND ND 66 <br /> IReport Limit Multiplication Factor 100 1 1 1 1 <br /> non-gas <br /> patte rn <br /> I <br /> Surrogate%Recovery FID 1279E 1 PID 105% FID 103%/PID 103% FID'f05%/PID 105% FID 101%1 PID lop% F1D 104%/PID 103% <br /> IInstrument 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 /> IANALYST APPROVED BY <br /> Clan J Cone Ja Ips <br /> oratory Director <br />