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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services P 0 Box 1360 Winton, CA 95388 Phone (209) 384-2930 <br /> iCertificate 112079 Fax {209) 384-1507 <br /> Advanced GeoEnvironmental, Inc Client Project ID Tap Filling Sampled 10-18-96 <br /> i of Northern California Reference Number 915 Received 10-23-96 <br /> 1803 West March Lane, Suite A Sample Description Water Extracted 10-28-96 <br /> Stockton CA 95207 Sample Prep/Analysis Method 8015M, 8020 Analyzed 10 28-96 <br /> Attn Tim Cuellar Lab Numbers 915-1 W, 2W 3W, 4W, 5W Reported 10-31-96 <br /> i TOTAL PETROLEUM HYDROCARBONS - GASOLINE RANGE <br /> WITH BTEX DISTINCTION <br /> ANALYTE REPORTING LIMIT SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> MW 1 MW 2 MW-3 MW-4 MW 5 <br /> (uglL) (uglL) (uglL) (uglL) (uglL) (ug/L) <br /> MTBE 050 ND ND 34 057 ND <br /> i BENZENE 0 50 2 3 17 760 1 7 1600 <br /> TOLUENE 0 50 ND 067 61 ND 93 <br /> ETHYL BENZENE 0 50 ND 3 6 160 ND 770 <br /> TOTAL XYLENES 0 50 ND 60 130 ND 1100 <br /> i GASOLINE RANGE <br /> HYDROCARBONS 50 ND 250 2400 ND 11000 <br /> Report Limit Multiplication Factor 1 1 25 1 50 <br /> i <br /> i <br /> Surrogate % Recovery FID 98 7%1 PID 96 8% FID-106%1 PID 98 9% FID 116%1 PID 110% FID 100%11`0 99 2% FID 117%1 Pfo-105% <br /> Instrument ID VAR-GC1 VAR-GC1 VAR-GC1 VAR GC1 VAR-GC1 <br /> Practical Quantitation Limit = Reporting Limit x Report Limit Multiplication Factor <br /> Analytes reported as ND were not detected or below the Practical Quantitation Limit <br /> i � <br /> ANALYST _ �'ldl�_ �G�_ � APPROVED BY <br /> Clan J Cone J es It Phil rps <br /> invironmental Lab Director <br /> i <br />