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1 <br /> CASTLE ANALYTICAL LABORATORY <br />' Environmental Testing Services 2333 Shuttle Drive, Atwater, CA 95309 Phone 1209) 384-2930 <br /> Certificate #2079 Fax (209) 384-1507 <br />' Advanced GeoEnvironmental, Inc Client Protect ID Top Filling Sampled 10 13-99 <br /> of Northern California Reference Number 2535 Received 10-15-99 <br /> 4005 North Wilson Way Sample Description Water Extracted 10-20-99 <br /> Stockton, CA 95205 Sample Prep/Analysis Method EPA 5030/8015, 8020 Analyzed 10-20-99 <br />' Attn Tim Cuellar Lab Numbers 2535-6W, 7W, SW Reported 10 22-99 <br /> L_ =�J <br />' TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br />' ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID <br /> VW 3 VW 2 VW 1 <br />' 10-13-99 10-13-99 10 1399 <br /> (ug/L) (ug/L) (ug/L) (ug/L) <br /> MTBE 050 11000 860 ND <br />' BENZENE 050 6400 37000 38000 <br /> TOLUENE 050 7200 17000 45000 <br /> ETHYL BENZENE 050 1900 2800 3600 <br />' TOTAL XYLENES 050 9200 12000 16000 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 83000 140000 290000 <br /> Report Limit Multiplication Factor 500 1000 2000 <br /> I <br /> I <br />' Surrogate % Recovery Flo 108%1 PID 107% FID 103%1 PID 102% FID 103%1 PID 102% <br /> Instrument 1D 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 /> yw—ANALYST APPROVED BY <br /> Clan J Cone Jame Phdbps <br /> ironmental Lab Director <br />