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CASTLE ANALYTICAL LABORATORY i <br /> Environmental Testing Seances 2333 Shuttle Drive,Atwater,CA 95301 Phone (209)384-2930 <br />' Certificate#2480 Fax (209)384-1507 <br /> Advanced GeoEnvironmental Inc Client Protect ID Top Filling Station Sampled 06-04-03 <br /> of Northern California Reference Number 5793 Received 06-10-03 <br /> 837 Shaw Road Sample Description Water Extracted 06-11-03 <br /> Stockton CA 95215 Sample Prep/Analysis Method EPA 50301$015 8020 Analyzed 06-11-03 <br /> Attn Tim Cuellar Lab Numbers 5793-6W,7W,8W,9W IOW Reported 06-18-03 <br /> r <br /> TOTAL PETROLEUM HYDROCARBONS -GASOLINE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW-6B MW-6C MW-61D MW-61E MW-71B <br /> 060403 060403 060403 060403 060403 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (uglL) (uglL) <br /> MTBE 050 710 53 74 NO 620 <br /> BENZENE 050 9600 330 160 62 43000 <br /> TOLUENE 050 1800 200 140 53 37000 <br /> ETHYLBENZENE 050 670 60 18 77 2600 <br /> rTOTAL XYLENES 050 3800 140 85 30 12000 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 33000 1800 820 340 170000 <br /> r Report Limit Multiplication Factor 50 20 10 2 1000 <br /> Report Limit Multiplication Factor for Benzene only 500 <br /> r <br /> r <br /> r <br /> Surrogate%Recovery FID 101 hl PID 190% FID 944%1 PID 953A fl() 918%1 PID 94 B% FID 946%1 PID 964% FID 100%/PID 10195 <br /> rInstrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR-GCI VAR-GC1 <br /> Analytes reported as NO were not detected or below the Practical Quantitation Limit <br /> rPractical Quantitation Limit=Reporting Limit x Report Limit Multiplication Factor <br /> rANALYST APPROVED BY (:2A <br /> Clan J Cone mes Phr Irps <br /> Laboratory Director <br /> r <br />