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I <br /> I 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 Top Filling Sampled 03-06-02 <br /> of Northern California Reference Number 4475 Received 03-07-02 <br /> 837 Shaw Road Sample Description Water Extracted 03-11-02 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 503018015,8020 Analyzed 03-11-02 <br /> Attn Tim Cuellar lab Numbers 4475-1W, 2W,3W,4W,5W Reported 03-21-02 <br /> TOTAL PETROLEUM HYDROCARBONS-GASOLINE <br />' WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE 10 SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 1 MW 2 MW 3 MW 4 MW 5 <br /> 030602 030602 030602 030602 030602 <br />' (ug/L) (ug1L) (ug/L) (ug/L) (ug/L) (ug1L) <br /> MTBE 050 ND 2 3 140 ND ND <br /> BENZENE 050 ND ND 880 ND 36 <br /> iTOLUENE 050 ND ND 13 076 ND <br /> ETHYL BENZENE 050 ND ND ND ND ND <br />' TOTAL XYLENES 050 ND ND ND ND 27 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 ND ND 1100 ND 720 <br /> Report Limit Multiplication Factor 1 1 2 1 1 <br />' Report Limit Multiplication Factor for MTBE only 5 <br /> Report Limit Multiplication Factor for Benzene only 20 <br /> 1 <br />' Surrogate%Recovery RD 938%lP1D 941% FID 897%l PID 907% RD 12f%l PID 117% RD 953%l PID 989% FID 157%IPID 112% <br />' Instrument 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 /> 3 <br /> 1\ ANALYST APPROVED BY <br /> \ Clan J Conem s C Phillips <br /> Laboratory Director <br /> 1 <br />