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Table 4 Historical Groundwater Quality Record Teichert Vernalis Plant Area (all units in mg/L,unless otherwise specified) Total Total Coliform Sampling EC TDS pH hardness Ca Nig Na K Alkalinity Oil CO3 HCO3 SO4 CI NO3 NO2 P F R Cu Fe 111n Zn Total Fecal Point Date (pS/cm) as CaCO3 as CaCO3 as 011 as CO3 as IIC03 as NO3 as NO2 (pg/L) (jig/L) (pg/l,) (jig/I.) (Nll'N/1110 mL) Maximum Contaminant 6.5 to Level' 900* 500* 8.5* - - - - - - 250* 250* 45 3 2 - 1,000* 300* 50* 5,000* - Hall 11/19/2003 949 600 7.1 270 72 22 86 2 230 ND ND 280 58 124 12.3 ND - 0.3 0.5 ND 80 ND ND Absent - Hall 2/17/2004 941 550 7.0 256 68 21 85 2 220 <10 <10 270 58 122 17.9 <0.3 - 0.3 0.4 <10 <50 <10 <20 <i.1 -- Hall 5/18/2004 936 560 6.9 264 71 21 87 2 230 <10 <10 280 61 110 17.4 <0.3 - 0.2 0.5 <10 <50 <10 <20 <1.1 - Hall 8/24/2004 934 530 7.1 282 75 23 90 2 230 <10 <10 280 62 112 17.9 <0.3 - 0.3 0.5 <10 <50 <10 QO <1.1 - Hall 12/2/2004 932 580 7.5 275 74 22 88 2 230 <10 <10 280 63 117 18.8 <0.3 - 0.3 0.5 <10 <50 <10 QO <1.1 - Hall 2/23/2005 952 550 7.4 266 72 21 90 2 230 <10 <10 290 62 121 18.6 <0.3 - 0.2 0.5 <10 <50 <10 QO <1.1 Hall 5/11/2005 990 600 7.4 318 88 24 83 2 240 <10 <10 290 100 109 14.8 <0.3 - 0.2 0.4 <10 <50 <10 <20 <1.1 - Hall 8/30/2005 956 600 7.4 266 72 21 85 2 180 <10 <10 220 65 147 18.2 <0.3 --- 0.2 0.4 <10 <50 <10 <20 <1.1 -- Hall 11/15/2005 949 590 7.4 270 72 22 82 2 200 <10 <10 240 63 127 18.4 1.7 --- 0.2 0.5 <10 <50 <10 <20 <1 - Hall 2/15/2006 946 540 7.4 278 75 22 91 2 220 <10 <10 260 63 120 18.2 1.6 --- 0.2 0.5 <10 <50 <10 <20 <1.I - Hall 5/31/2006 985 560 7.6 292 79 23 89 2 220 <10 <10 260 68 140 19.2 <0.3 --- 0.2 0.5 <10 <50 <10 <20 <1.1 - Hall 8/21/2006 992 630 7.5 274 75 21 86 2 220 <10 <10 260 67 137 19.0 <0.3 --- 0.2 0.4 <10 <50 <10 QO <l.l - Hall 11/14/2006 979 590 7.5 289 78 23 92 2 220 <10 <10 270 64 130 19.3 <0.3 --- 0.2 0.40 <10 <50 <10 QO <1.1 - Hall 2/13/2007 972 600 7.6 275 74 22 90 2 220 <10 <10 260 68 137 17.6 <0.3 --- 0.3 0.34 <10 <50 <10 <20 <1.1- - Hall 5/29/2007 967 600 7.5 252 68 20 86 2 210 <10 <10 260 67 132 19.1 <0.3 --- <0.1 0.39 <10 70 <10 QO <l.l - Hall 8/14/2007 957 550 6.7 283 77 22 94 2 210 <10 <10 250 68 129 18.6 <0.3 - 0.2 0.49 <10 <50 <10 <20 <1.1 - Hall 11/26/2007 955 590 7.8 283 77 22 84 2 210 <10 <10 260 68 132 18.6 <0.3 - 0.2 0.4 <10 <50 <10 <20 <1.I - Hall 2/4/2008 952 550 7.8 278 75 22 89 2 210 <10 <10 260 70 134 19.2 <0.3 -- 0.1 0.4 <10 <50 <10 QO <1.1 <1.1 Hall 5/1/2008 932 550 7.3 269 73 21 86 2 210 <10 <10 260 71 121 17.2 <0.3 - 0.2 0.4 <10 <50 <10 QO <1.1 <1.1 Hall 8/26/2008 865 560 6.9 268 71 22 88 2 210 <10 <10 250 77 119 19.1 <0.3 - 0.2 0.5 <10 <50 <10 QO 1.1 <1.1 Hall 11/25/2008 958 530 8.1 270 72 22 87 2 200 <10 <10 250 74 125 19.2 <0.3 - 0.2 0.5 <10 <50 <10 QO <1.1 <1.1 Faulkner 6/1/1994 1,000 680 7.8 360 93 31 97 ND 230 ND ND 280 75 32 25 ND ND ND 0.5 ND 60 ND 70 Absent --- Faulkner 10/4/1994 1,100 620 7.5 320 86 26 100 ND 240 ND ND 300 66 120 36 ND ND ND 0.5 ND ND ND ND Present'Absent' Faulkner 1/19/1995 1,(100 600 7.4 310 80 25 92 ND 230 ND ND 280 72 130 30 ND ND 0.1 0.5 ND ND ND ND Absent --- Faulkner 4/26/1995 1,000 600 7.6 290 79 23 87 ND 220 ND ND 270 74 140 25 ND ND ND 0.4 ND ND ND ND Absent -- Faulkner 7/6/1995 980 600 7.5 280 72 23 88 ND 230 ND ND 280 66 140 24 ND ND ND 0.5 ND ND ND ND Absent --- Faulkner 11/11/1995 1,000 600 7.7 310 83 25 92 ND 270 ND ND 320 75 135 29 ND ND ND 0.4 ND ND ND ND Absent -- Faulkner 1/11/1996 1,000 630 7.4 300 83 23 89 ND 280 ND ND 350 64 140 30 ND ND 0.3 0.4 ND ND ND ND Absent - Faulkner' 5/2/1996 990 580 7.4 320 82 29 91 2 230 ND ND 270 80 140 26 ND ND 0.6 0.4 ND 30 ND ND Absent - Faulkner 7/10/1996 990 610 7.5 310 82 26 80 ND 230 ND ND 280 82 140 27 ND ND 0.3 0.4 ND ND ND ND Absent - Faulkner 10/16/1996 1,000 620 7.3 330 89 26 93 2 240 ND ND 290 75 140 30 ND ND ND ND ND ND ND ND Absent --- Faulkner 1/21/1997 1,000 610 7.6 315 85 25 82 2 220 ND ND 270 75 140 29 ND ND 0.1 0.4 ND ND ND ND Absent -- Faulkner 4/9/1997 980 590 5.8 330 89 26 88 2 230 ND ND 280 76 140 29 ND ND 0.6 4 ND ND ND ND Absent --- Faulkner 7/3/1997 950 620 7.4 320 88 25 84 2 220 ND ND 270 77 120 24 ND ND 0.2 0.4 ND ND ND ND Absent -- Faulkner 10/16/1997 980 610 7.5 300 82 23 85 3 210 ND ND 260 79 130 24 ND ND 0.3 0.4 ND ND ND ND Absent --- Faulkner 1/27/1998 960 760 7.5 300 82 23 77 2 230 ND ND 280 76 120 22 ND ND 0.2 0.4 ND ND ND ND Absent --- 12/30/2108-3:35 PM Page 2 of 8