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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 12079 Fax (209) 384-1507 <br />' Advanced GeoEnvironmental, Inc Client Project ID Cal Fuels Sampled 4 29-99 <br /> 1 P <br /> of Northern California Reference Number 2250 Received 5-4-99 <br />' 4005 North Wilson Way Sample Description Water Extracted 5-6-99 <br /> Stockton, CA 95205 Sample Prep/Analysts Method EPA 503018015, 8020 Analyzed 5-6-99 <br /> Attn Tim Cuellar Lab Numbers 2250 12W, 13W, 14W Reported 5-18-99 <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br />' WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> AW 1 B/ AW-281 VW-1/ <br /> 4-29 99 4-29-99 4-29-99 <br /> (ug/L) ;ug/L) (ug/L) (ug/L) <br />' MTBE 050 NO NO ND <br /> BENZENE 0 50 5600 380 18000 <br /> TOLUENE 0 50 1900 250 71000 <br /> lie ETHYL BENZENE 050 2000 58 6200 <br /> TOTAL XYLENES 0 50 8700 250 28000 <br />' GASOLINE RANGE <br /> HYDROCARBONS 50 62000 2000 270000 <br />' Report Limit Multiplication Factor 200 10 2000 <br /> Surrogate % Recovery Flo 110%1 PIC 105% PID 106%1 Pio 109% Fia 96 7%1 PID Be 4% <br /> Instrument ID VAR-GC1 VAR GC1 VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> ANALYST APPROVED BY i <br /> Clair J Cone P r tps <br /> Environmental Lab Director <br />