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T <br /> . CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone: (209)384-2930 <br /> Certificate No.2480 <br /> Fax: (209) 384-1507 <br /> Advanced GeoEnvironmental, Inc. Client Project ID:Grewals Market Sampled: 01-29-04 <br /> ' of Northern California Reference Number:6597 Received: 02-03-04 <br /> 837 Shaw Road Sample Description:Water Extracted: 02-06-04 <br /> Stockton, CA 95215 Sample Prep/Analysis Method: EPA 5030/8260 Analyzed: 02-06-04 <br /> Attn: Tim Cuellar Lab Numbers:6597-1W,2W Reported: 02-12-04 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GUMS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID <br /> LIMIT DW-451 DW-452 <br /> N. Lillian Lillian <br /> ( IL) (u IL) u iL <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 0.50 ND ND <br /> Di-isopropyl Ether (DIPE) 0.50 ND ND <br /> Ethyl tert-Butyl Ether (ETBE) 0.50 ND ND <br /> tert-Amyl Methyl Ether(TAME) 0.50 ND ND <br /> tert-Butanol (TBA) 20 ND ND <br /> VOLATILE HALOCARBONS <br /> 1,2-DicNoroethane (1,2-DCA) 0.50 ND ND <br /> ' Ethylene Dibromide (EDB) 0.50 ND ND <br /> 1 Report Limit Multiplication Factor: 1 1 <br /> Surrogate Recoveries <br /> ' 1,2-Dichloroethane-d4 94,5% 501% <br /> 105% __ 104%- <br /> Toluene-d8 <br /> Instrument ID: HP 5972 MS <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 /> (Ng/L)= microgr 1 s per liter orjwrrq per billion(ppb) <br /> ' <br /> ANALYST: APPROVED BY: <br /> ' <br /> Clan . Cone Jar�es . Philips <br /> /laboratory Director <br />