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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 Properly-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:04-03-12 <br /> Attn:Mike Vlach Sample Prep/Analysis Method:EPA 5030/8015,8020 Analyzed:04-03-12 <br /> Lab Numbers: 1203108-11,12,13,14,15 Reported:04-04-12 <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-8D MW-9 MW-10 MW-11 EW-1 <br /> (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) (ug/L) <br /> BENZENE 0,50 NO ND 470 ND 16000 <br /> TOLUENE 0.50 ND ND ND NO 22000 <br /> ETHYL BENZENE 0,50 ND NO 400 ND 3400 <br /> TOTALXYLENES 0.50 ND ND NO ND 16000 <br /> GASOLINE RANGE <br /> HYDROCARBONS 50 ND NO 2900 ND 120000 <br /> Report Limit Multiplication Factor: 1 1 20 1 500 <br /> Surrogate%Recovery: Flo:94A%MD:IW% Flo.92.3%1 PU 07.3% Flo 128%1 Pit);117% FID 82.6%t PID:100% Flo,105%1 PID:104% <br /> Instrument ID: HP-GC1 HP-GCl HP-GCl HP-GCl HP-GCl <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 /> APPROVED BY: <br /> or" 1P IL rely Director or <br /> tory Manager <br /> J 4M " 4--b- <br /> Clari J.Cone/L <br /> 76 of 82 <br />