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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater, CA 95301 Phone (209) 384-2930 <br /> Certificate#1-2480 Fax (209)364-1507 <br /> I <br /> [[A�dvanceiJdGeoEnvironmental, Inc Client Protect ID Top Filling Sampled 10-30-01 <br /> orthern California Reference Number 4187 Received 11-2-01 <br /> 837 Shaw Road Sample Description Water Extracted 11-5-01 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 11-5-01 <br /> Attn Tim Cuellar Lab Numbers 4187-6W, 7W 8W Reported 11-15-01 <br /> I TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW7C MW70 MW7E <br /> 103101 103101 103101 <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 ND 28 ND <br /> BENZENE 050 33 110 60 <br /> TOLUENE 050 18 110 29 <br /> ETHYL BENZENE 050 17 23 60 <br /> TOTAL XYLENES 050 15 140 25 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 160 1300 230 <br /> Report Limit Multiplication Factor 1 5 2 <br /> I <br /> Surrogate% Recovery FID 104%1 PID 999% FID 116%fP1D 198% FID 107%IPID 100% <br /> Instrument ID 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 Re Limit Multiplication Factor <br /> ANALYST APPROVED BY / / <br /> Clan J Cone Ja s C Phd6ps <br /> boratory Director <br />