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i <br /> CASTLE ANALYTICAL 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 ID Top Filling Sampled 5-29-01 <br /> of Northern California Reference Number 3790 Received 5-31-01 <br /> 837 Shaw Road Sample Description Water Extracted 6-8-01 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015, 8020 Analyzed 6-8-01 <br /> Attn Tim Cueflar Lab Numbers 3790-11W Reported 6-13-01 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID <br /> VW3B <br /> 052901 <br /> (ug/L) (ug/L) <br /> MTBE 050 280000 <br /> BENZENE 050 19000 <br /> TOLUENE 050 32000 <br /> • ETHYL BENZENE 050 1900 <br /> TOTAL XYLENES 050 10000 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 240000 <br /> IReport Limit Multiplication Factor 1000 <br /> Surrogate% Recovery AD 104%,aiD 101% <br /> Instrument ID 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 /> 2ANALYST APPROVED BY <br /> Clary J Cone Ja s C Phillips <br /> aboratory Director <br />