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Table 4 <br /> Historical Groundwater Quality Record <br /> Teichert Vernalis Plant Area <br /> (all units in mg/L,unless otherwise specified) <br /> Total Total Coliform <br /> Sampling EC TDS pH Hardness Ca Nig Na K Alkalinity Oil CO3 HCO3 SO4 Cl NO3 NO2 P F R ('u Fe )III Zn Total Fecal <br /> Point Date (pS/cul) as CaCO3 as C'aCO3 as Oil as('03 as 11003 as NO3 as NO2 (pt;/1.) (p /I.) (pg/1) (pg/1.) (iAll'N/III(1 nil,) <br /> Maximum Contaminant 6.5 to <br /> Level' 900* 500* 8.5* - - - - - - - 250* 250* 45 3 2 - 1,000* 300* 50* 5,000* <br /> -- <br /> --- 0.2 ND ND 100 ND ND --- --- <br /> 32 98 100 <br /> Oster 10/16/1996 840 500 7.4 240 62 20 87 2 160 — — 200 <br /> Koster 4/9/1997 820 500 6.8 240 64 18 85 2 170 ND ND 200 96 100 6.5 ND ND 0.5 1 ND 220 ND ND --- --- <br /> Koster 7/3/1997 810 550 7.4 230 62 19 82 3 150 ND ND 180 98 95 28 ND ND 0.3 1 ND ND ND ND --- --- <br /> Rustan 3/1/1994 840 460 7.7 178 48 14 87 ND 174 ND ND 212 45 80 11.2 ND ND 0.2 0.7 ND ND ND ND -- --- <br /> Notes: <br /> As of 2004,non-detected values are given as"<reporting limit". <br /> 1. Maximum contaminant levels for drinking water supply. Concentrations marked"*"are secondary,i.e.,consumer acceptance limits for drinking%cater. For EC,TDS,chloride,and sulfate,the recommended(lower)values are given. <br /> 2. Retesting in November 1994 confirmed presence of total coliform bacteria and absence of fecal coliform. <br /> 3. Sample results for alkalinity series(total alkalinity,OH,CO3,and HCO3)were verified by duplicate sample results from independent laboratory. <br /> 12/3012008-3:35 PM Page 8 of 8 <br />