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Historical Groundwater Quality Record Vernalis Area (all units in mg/L,unless otherwise specified) Total Total Coliform Sampling EC TDS pH Hardness Ca Mg Na K Alkalinity OH CO3 HCO3 SO4 Cl NO3 NO2 P F B Cu Fe Mn Zn Total Fecal _ Point Date (pSlem) as CaCO3 asCaCO3 asOH asCO3 as HCO3 as NO3 as NO2 (gg/L) (µpJL) (1!&1L) (lt>;IL) LMPN1100 mL) .., Maximum Contaminant 6.5 to Level' 900* 500* 8.5* 250* 250* 45 3 2 - 1,000* 300* 50* 5,000* Hall 3/1/1994 1,020 570 7.5 259 70 20 94 NO 216 ND ND 264 51 108 14,9 NO NO 0.3 0.5 ND ND ND NO Absent --- Hall 6/1!1994 930 590 7,5 290 73 27 99 NO 220 ND ND 270 58 100 16 NO ND ND 0.5 NO ND ND NO Absent Hall 10/4/1994 1,000 570 1.5 280 73 23 91 NO 2E0 ND ND 250 61 120 21 NO NO NO 0.5 NO ND NO NO Absent --- Hall 1/19/1995 980 550 7.5 290 74 23. 90 NO 230 NO ND 280 66 130 23 ND ND 0.1 0.5 NO NO NO NO Absent --- Hall 4/26/1995 980 570 7.6 280 73 23 88 NO 220 ND ND 270 62 140 21 ND NO 0.1 0.5 ND NO ND 50 Absent --- Hall 7/6/1995 990 600 7.5 300 79 24 84 ND 230 NO NO 280 73 130 25 ND ND NO 0.5 ND ND NO NO Absent -- Hail 11/11/1995 1,000 620 7.4 300 79 24 95 NO 280 NO NO 340 66 140 26 NO NO NO 0,5 NO NO NO NO Absent --- Hall 1/11/1996 1,000 610 7.4 290 76 24 95 ND 290 ND NO 350 60 150 26 ND NO 0.3 0.5 ND NO NO NO Absent --- Hall 512/1996 1,000 560 7,4 300 78 26 99 2 230 ND ND 280 69 150 25 ND ND 0.6 0.5 NO NO ND NO Absent --- Hall 7110/1996 1,000 640 7.4 310 81 27 89 2 230 NO ND 280 70 160 31 ND NO 0.3 0,5 NO NO NO ND Absent --- Hall 10116/1996 1,000 610 7.4 310 83 26 100 2 230 ND NO 280 71 150 29 ND NO NO - NO NO ND ND NO Absent --- Hall 1/21/1997 1,000 640 7.6 308 82 25 92 2 210 ND ND 260 71 160 28 ND NO 0.2 0.5 NO NO ND NO Absent --- Hall 4!911997 1,000 600 6.1 310 85 24 90 2 210 NO NO 250 68 160 29 NO ND 0.6 0.5 ND NO NO NO Absent --- Hall 7/3/1997 1,000 630 7.4 330 94 24 99 1 220 ND ND 270 69 150 26 ND ND 0.4 0.7 ND NO NO NO Absent --- Hall 10/16/1997 1,100 660 7.5 310 84 25 100 4 230 ND NO 280 74 160 28 ND NO 0.4 0.6 NO ND ND ND Absent --- flail 1/27/1998 1,100 830 7.5 310 85 25 92 2 220 NO NO 270 76 150 27 NO ND 0.2 0,5 ND NO NO NO Absent --- hall 5!511998 1,000 620 7.7 300 81 24 96 l 220 ND NO 270 70 140 25 NO NO 0.2 0.5 ND NO NO ND Absent --- Hall 8/4/1998 1,000 610 7.7 300 81 24 97 2 210 ND NO 260 86 130 22 NO NO 0.2 0.5 NO NO NO ND Absent --- Flail 11/4/1998 1,000 630 7.6 310 82 25 93 2 220 NO ND 270 68 130 20 NO --- 0,2 0.4 NO NO ND ND Absent --- Hall 2/2/1999 1,000 630 7.3 310 83 24 92 2 230 NO ND 280 65 130 19 NO --- 0.2 0.4 ND ND ND ND Absent --- Hall 5/11/1999 1,000 600 7.4 310 83 24 89 2 250 ND NO 300 74' 130 23 NO --- 0.2 0.5 100 ND NO 130 Absent --- Hall 8/18/1999 1,020 600 7.4 299 82 23 90 2 240 NO NO 290 65 132 20.5 ND --- 0.1 0.5 NO NO ND NO Absent --- Hall 11/17/1999 1,020 600 7.7 MI. 85 24 88 2 230 ND NO 280 70 138 21.4 NO --- 0.3 0.5 NO ND NO NO Absent --- Hall 2124!2000 1,000 620 7 298 80 24 95 2 220 ND NO 260 73 143 22.6 NO --- 0.2 0.5 NO ND ND 70 Absent -- Hall 5/16/2000 1,030 610 6.9 273 73 22 90 2 220 NO NO 270 72 142 21,4 NO --- 0.2 0.5 NO NO NO NO Absent --- Hall 9/7/2000 1,070 630 7.3 289 78 23 99 2 220 NO ND 270 74 15223.9 ND --- 0.2 0.5 NO ND ND ND Absent --- Hall 11/28/2000 1,080 630 7 298 80 24 97 2 220 NO ND 270 72 147 .23.8 NO --- NO 0.54 NO NO NO ND Absent Hall 2/21/2001 1,030 610 6.9 284 76 23 95 2 220 ND ND 270 73 137 21,9 NO --- 0.1 0.53 NO NO NO 30 Absent Hall 5/23/2001 1,010 590 6.9 296 79 24 95 2 230 NO NO 280 70 136 20.7 NO NO 0.5 ND NO ND NO Absent --- Hall 8/28/2001 1,010 640 7.6 271 74 21 91 2 230 NO NO 280 70 129 20.5 ND 0,2 0.46 NO NO NO ND Absent --- Hall 12/11/2001 998 580 7.3 284 76 23 89 2 230 ND NO 280 67 126 19.5 NO --- 0.1 0.47 NO ND ND 40 Absent --- Hall 3112/2002 980 590 7.1 264 68 23 90 2 230 ND ND 280 63 128. 18.9 NO --- ND 0.47 NO ND ND NO Absent --- Hall 6/19/2002 959 570 7.4 268 71 22 87 2 230 NO NO 280 59 123 16.9 NO --- 0.1 0.47 NO NO NO ND Absent --- Hall 8!712002 958 590 7.4 266 72 21 86 2 230 ND NO 280 52 119 16 NO --- 0.1 0.43 NO NO NO NO Absent --- Hall 10122/2002 967 590 7.8 289 78 23 92 2 230 NO NO 280 61 128 19.4 NO --- 0,2 0.5 NO ND ND NO Absent --- Hall 1/28/2003 973 590 8 287 77 23 86 2 230 ND NO 280 65 133 19.9 NO --- 0.1 0,51 NO NO ND NO Absent --- Hall 4/29/2003 953 580 7.3 273 73 22 95 2 230 NO NO 270 63 128 20.6 ND --- ND 0.5 ND NO NO NO Absent --- Hall 8/13/2003 955 570 7.4 268 71 22 89 2 230 NO NO 280 63 123 18.5 ND --- 0.3 0.47 NO NO NO NO Absent --- Hall 11/19/2003 949 600 7.1 270 72 22 86 2 230 ND NO 280 58 124 123 ND --- 0.3 0.5 ND 80 NO NO Absent --- 1/2x12609-10:12 AM Pagc I of8