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Table A: Historical Groundwater Measurements and Analytical Results <br /> DEPTH TO GROUNDWATER <br /> SAMPLE DATE GROUNDWATER ELEVATION ETHYL- <br /> LOCATION SAMPLED (Peet hgs) (Feet msl) TPI-I-K TPH-MO TPH-D TPH-G BENZENE TOLUENE BENZENE XYLENES MTBE DIPE ETRE TAME TBA 1,2-DCA EDB Naphthalene <br /> NIethod 8015M 8015M 80151V1 8015N1 8021B 80218 802IB 8021B 82608 82606 8260B 82606 82600 8260B 8260B 8260B <br /> Lt-PI:vf-ct-.1i- <br /> ng <br /> MCL None None 56 ltg/L' S 1tgIL' 1.0lrglL ! L10 <br /> 300 ItglL 1,750 Irg/L 13 pg/L None None None 121rg1L' 0.5µglL 0.05µg/L <br /> NOTES: All measurements and data dated prior to June 2010 were provided by Ramage Environmental.Condor Earth Technologies,Inc,is not responsible for the accuracy and completeness of information collected and developed by others. <br /> All results are reported in micrograms per liter(ug/1)which translates to parts per billion(ppb) <br /> Total Petroleum Hydrocarbons as Diesel(TPH-D)analyzed by EPA Method 8015N1 <br /> Total Petroleum Hydrocarbons as Gasoline(TPH-G),benzene,toluene,ethylbenzene,xylenes by EPA Method 8260B or 8021 B18015M <br /> Oxygenates:Methyl-t-butyl ether(MTBE),Di-isopropyl ether(RIPE),Ethyl-t-butyl ether(ETRE),Tert-amyl methyl ether(TAME)and Tert-Butanol(TBA)by EPA 82606 <br /> 1,2-Dichloroethanc(1,2-DCA)and 1,2-dibromoethane(EDB)analyzed by EPA Method 8260B <br /> 0.5=Not Detected at reporting limit of 0.5 ppb <br /> NA =Not analyzed for specified compound <br /> Sample chromatograph does not resemble fuel standard used for quantitation,result is estimated <br /> Result is elevated due to the presence of single analyte peak(s)in the quantitation range <br /> K°* Samples SVE-2B,collected on 3/2[12013 and 12/0912013 were incorrectly identified in the field as VW-2B. <br /> 1vICL=Maximum Concentration Level,from California Department of Public Health,in micrograms per liter, pg/L <br /> None-MCL is not available <br /> Method=United States Environmental Protection Agency Analytical Method <br /> I—notification level,not a MCL bgs=below ground surface <br /> =EPA Health Advisory level and Taste and Odor Threshold msl=mean sea level <br /> Wellhead elevations and locations survey by Morrow Surveying in April 1999,December 2001,December 2003,and April 2005 Basis of elevations: City of Stockton Benchmark#113(Elevation 19.51 Feet). <br /> '=result with EPA Method 8270C analysis. <br /> ''-result with EPA Method 8260B analysis;EPA Method 82700 analytical result was 2,000 ug/L. <br /> XAProject15000_prj15960 SJC UST R(=Q15960C County of San Joaquin-SJC Public Works\5960C5\596005A MonitoringlReports12H2O15120151116-5960C5A Historic Data 2H2O15.xlsxTable A 8 of 8 <br />