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Table 4 Historical Groundwater Quality Record Teichert Aggregates and Granite Construction -Vernalis Area, San Joaquin County (all units in mg/L, unless otherwise specified) Total Total Coliform Sampling EC TDS pll Hardness Ca Mg Na K Alkalinity 011 ('O3 HCO3 SO4 Cl NO3 NO2 P F B Cu Fe Mn Zn Total Fecal Point Date (pS/cm) as CaCO3 as CaCO3 as 011 as CO3 as HCO3 as NO3 as NO2 (pg/L) (pg/L) (pg/L) (pg/l.) (MPN/100 mL) 65 to Maximum Contaminant Level' 900' 500" n 5' _ _ - _ - 250• 250' 45 3 2 - 1,000' 300' 50" 5,000• S.Tracy#1 11/14/2006 849 540 7.5 262 67 23 75 2 170 <10 <10 210 143 58 33.2 <0.3 - 0.3 0.89 <10 <50 <10 QO - - S.Tracy#1 2/13/2007 850 570 7.5 253 65 22 76 2 170 <10 <10 210 149 60 29.4 <0.3 - 0.3 0.83 <10 <50 <10 QO S.Tracy#1 5/29/2007 849 530 7.5 262 67 23 78 2 160 <10 <10 200 141 65 36.8 <0.3 - 0.3 1.05 <10 <50 <10 <20 - - S.Tracy#I 8/14/2007 851 540 6.9 271 69 24 80 2 180 <10 <10 210 149 56 31.3 <0.3 - 0.3 1.01 <10 <50 <10 <20 --- --- S.Tracy#l 11/26/2007 839 560 8.0 259 66 23 72 2 170 <10 <10 210 148 60 32.1 <0.3 - 0.1 I.0 <10 <50 <10 <20 S.Tracy#l 2/4/2008 837 490 7.8 254 64 23 75 2 170 <10 <10 210 144 60 34.2 <0.3 - 0.2 1.0 <10 70 <10 QO S.Tracy#I 5/1/2008 848 540 7.7 262 67 23 76 2 170 <10 <10 200 154 60 31.0 <0.3 - 0.2 0.9 <10 70 <10 QO --- --- S.Tracy#l 8/26/2008 861 530 6.9 263 66 24 78 2 170 <10 <10 200 144 58 32.2 <0.3 - 0.2 l.0 <10 <50 <10 QO - S.Tracy#1 11/25/2008 850 500 7.8 252 63 23 75 2 160 <10 <10 200 148 61 31.9 <0.3 - 0.3 1.0 <10 50 <10 QO - S.Tracy#1 2/10/2009 844 520 8.2 243 61 22 75 2 160 <10 <10 190 144 61 29.0 <0.3 - 0.2 1.0 <10 140 <10 20 - S.Tracy#1 5/5/2009 856 520 8.2 245 62 22 80 2 130 <10 <10 160 158 77 32.0 <0.3 - 0.3 I.0 <10 90 <10 20 - S.Tracy#1 8/4/2009 848 510 8.2 254 64 23 76 2 150 <10 <10 180 140 67 37.4 <0.3 - 0.4 1.0 <10 <50 <10 QO - - S.Tracy#3 5/16/2000 841 530 6.9 268 68 24 73 2 180 ND ND 220 160 49 21.9 ND - 0.2 I ND ND ND ND - S.Tracy#3 3/31/2004 856 500 7.4 289 73 26 75 2 190 <10 <10 230 161 54 25.6 <O.3 - 0.3 1.0 <10 <50 <10 QO - S.Tracy#3 5/18/2004 854 550 7.1 273 70 24 75 2 190 <10 <10 230 161 51 22.3 <O.3 - 0.3 0.9 <10 <50 <10 <20 - S.Tracy#3 8/24/2004 853 560 6.9 285 73 25 75 2 190 <10 <10 230 163 50 22.4 <0.3 - 0.4 1.0 <10 <50 <10 QO - S.Tracy#3 12/2/2004 838 550 7.4 273 70 24 74 2 190 <10 <10 230 164 51 22.0 <0.3 - 0.3 0.9 <10 <50 <10 QO - S.Tracy#3 2/23/2005 863 540 7.4 275 69 25 74 2 190 <10 <10 240 159 54 25.3 <0.3 - 0.3 1.0 <10 <50 <10 QO - S.Tracy#3 5/11/2005 847 530 7.5 278 70 25 74 2 190 <10 <10 230 155 55 26.3 <0.3 - 0.3 0.9 <10 <50 <10 QO - S.Tracy#3 8/30/2005 850 580 7.2 264 68 23 71 2 90 <10 <10 210 158 62 27.4 <0.3 - 0.3 0.9 <10 <50 <10 QO - S.Tracy#3 11/15/2005 847 600 7.3 259 66 23 71 2 190 <10 <10 230 162 52 23.3 <0.3 - 0.2 0.9 <10 <50 <10 QO - S.Tracy#3 2/15/2006 847 550 7.4 283 72 25 77 2 190 <10 <10 230 155 52 22.5 0.33 - 0.3 1.0 <10 <50 <10 QO - S.Tracy#3 5/31/2006 865 550 7.6 278 70 25 72 2 180 <10 <10 220 157 58 29.1 <0.3 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#3 8/21/2006 863 580 7.6 259 66 23 70 2 180 <10 <10 220 151 57 28.8 <0.3 - 0.2 0.9 <10 <50 <10 QO - S.Tracy#3 11/14/2006 858 560 7.5 276 71 24 75 2 190 <10 <10 230 156 51 22.9 <0.3 - 0.3 0.89 <10 <50 <10 QO - S.Tracy#3 2/13/2007 860 570 7.6 268 68 24 76 2 190 <10 <10 230 168 54 21.2 <0.3 - 0.3 0.83 <10 <50 <10 QO - S.Tracy#3 5/29/2007 853 550 7.5 276 71 24 78 2 180 <10 <10 220 154 54 25.5 <0.3 - <0.1 1.05 <10 <50 <10 QO - S.Tracy#3 8/14/2007 858 550 6.7 278 72 24 80 2 180 <10 <10 220 161 50 22.1 <0.3 - 0.2 0.99 <10 <50 <10 QO - - S.Tracy#3 11/26/2007 853 560 8.1 283 72 25 72 2 180 <10 <10 220 158 53 25.0 <0.3 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#3 2/4/2008 848 510 7.7 268 68 24 74 2 180 <10 <10 230 157 53 26.2 <0.3 - 0.1 1.0 <10 <50 <10 QO - - S.Tracy#3 5/1/2008 854 550 7.7 271 69 24 74 2 180 <10 <10 220 165 52 21.8 <0.3 - 0.2 0.9 <10 <50 <10 QO - - S.Tracy#3 8/26/2008 871 540 6.9 263 66 24 74 2 180 <10 <10 220 159 54 25.1 <0.3 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#3 11/25/2008 867 530 7.9 270 67 25 74 2 180 <10 <10 210 159 56 26.0 <0.3 - 0.2 l.0 <10 50 <10 QO - - S.Tracy#3 2/10/2009 867 520 8.1 268 66 25 75 2 170 <10 <10 210 151 58 28.4 <0.3 - 0.2 1.0 <10 60 <10 QO - - S.Tracy#3 5/5/2009 850 520 8.1 263 66 24 73 2 160 <10 <10 190 148 64 33.8 <0.3 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#3 8/4/2009 849 510 8.1 268 68 24 74 2 170 <10 <10 200 146 59 31.9 <0.3 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#3 11/23/2009 850 500 8.0 263 66 24 74 2 180 <10 <10 210 154 56 27.8 <0.3 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#3 5/25/2010 850 520 7.4 280 71 25 77 2 170 <10 <10 210 155 58 29.0 <0.3 - 0.3 0.9 <10 <50 <10 QO - - S.Tracy#3 11/30/2010 842 540 7.3 280 71 25 73 2 160 <10 <10 200 143 59 30.5 <0.3 - 0.2 1.0 <10 <50 <10 QO - - S.Tracy#3 5/23/2011 847 520 7.4 271 69 24 71 2 150 <10 <10 190 147 62 33.2 <0.3 - 0.2 0.9 <10 70 <10 QO - - S.Tracy#3 11/17/2011 851 500 7.9 283 72 25 81 2 160 <10 <10 200 152 60 31.3 <0.3 - 0.2 1.0 <10 <50 <10 QO - - S.Tracy#3 5/31/2012 860 520 7.1 280 71 25 77 2 160 <10 <10 200 150 58 27.9 <0.3 - 0.2 0.9 <10 <50 <10 QO - - S.Tracy#3 11/20/2012 869 550 7.5 287 74 25 73 2 150 <10 <10 180 150 56 27.5 <0.3 - 0.2 0.9 <10 <50 <10 QO - - Page 6 of 10