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CASTLE ANALYTICAL LABORATORY <br /> Environmental Testing Services 2333 Shuttle Drive,Atwater,CA 95301 Phone: (209)384-2930 <br /> Certificate No.2480 Fax: (209)384-1507 <br /> Foothill Engineering Client Project Name:Olivarez Property-Stockton Sampled: 03-23-12 <br /> 8442 Story Ridge Way Lab Reference Number:1203108 Received: 03-26-12 <br /> Antelope,CA 95843 Sample Description:Water Extracted: 03-27-12 <br /> Attn:Mike Vlach Sample Prep/Analysis Method:EPA 5030/8260 Analyzed: 03-27-12 <br /> Lab Numbers-1203108-08,07,08,09,10 Reported- 04-04-12 <br /> GASOLINE ADDITIVES AND SOLVENTS BY EPA METHOD 8260 GC/MS <br /> ANALYTE REPORTING SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID SAMPLE ID <br /> LIMIT MW-3R MW-5 MW-6 MW-7S MW-8S <br /> (pg/L} (pg/L) (pg/L) (pg/L) (pg/L) <br /> FUEL OXYGENATES <br /> Methyl tert-Butyl Ether(MTBE) 0,50 ND ND ND NO NO <br /> Di-isopropyl Ether {DIPS) 0.50 NO ND ND ND ND <br /> Ethyl tort-Butyl Ether (ETRE} 0.50 ND ND NO ND NO <br /> tert-Amyl Methyl Ether(TAME) 0.50 NO ND ND ND ND <br /> tert-Butanol(TBA) 5.0 ND ND ND ND ND <br /> VOLATILE HALOCARBONS&AROMATICS <br /> 1,2-Dichloroethane (1,2-DCA) 0.50 ND 3.1 8,8 ND 0.51 <br /> Ethylene Dibromide (EDB) 0.50 ND ND ND NO ND <br /> Report Limit Multiplication Factor: <br /> Surrogate Recoveries <br /> 1,2-Dichloroeffiane-d4 99.4% 98.0% 96.7% 10110 <br /> Toluene-d8 937% 99.2% 96.9% 95.2% 95,2% <br /> Instrument ID:VARIAN MS <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 /> (pg/L)= micrograms per liter or parts per billion(ppb) <br /> APPROVED BY: <br /> Director <br /> Phillips <br /> Laboratory_Ltt o.t. <br /> James C.Phillips Laboratory Director or <br /> Clani J.Cane L boratoty Manager <br /> 79 of 82 <br />