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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) 70131 Total Coliform Sampling EC "FDS p11 Hardness Ca Mg Na h Alkalinity MI CO3 HCO3 SO4 Cl NO3 NO2 P IB Cu Fc Nln Zn 7btal Fecal Point Date (IIS/CM) asCaCO3 asCaCO3 as Oil as('03 asFIC03 as NO3 as NO2 1pg/1.) (pg/L) (pt;/L) (NIPN/100mL) 6.5 to Maximum Contaminant Level' 900' 500* 8.5* 250' 250" 45 3 2 1,000* 300* 50* 5,000' - Faulkner 12/2/2004 987 600 7.3 322 88 25 84 2 240 <10 <10 290 100 113 15.1 <0.3 - 0.2 0.4 <10 <50 <10 <20 <1.1 Faulkner 2/23/2005 1,010 620 7.4 316 87 24 86 2 250 <10 <10 300 99 116 15.9 <0.3 - 0.2 0.4 <10 <50 <10 QO <1.1 Faulkner 5/11/2005 944 550 7.4 275 74 22 89 2 230 <10 <10 280 62 120 18.7 <0.3 - 0.2 0.4 <10 <50 <10 QO <1.1 Faulkner 8/30/2005 963 640 7.4 293 81 22 80 2 320 <10 <10 390 99 123 12.9 <0.3 - 0.2 0.4 <10 <50 <10 <20 <1.1 Faulkner 11/15/2005 958 600 7.4 294 80 23 76 2 230 <10 <10 280 98 107 13.2 1.1 - 0.1 0.4 <10 <50 <10 <20 <1 Faulkner 2/15/2006 936 590 7.3 302 83 23 82 2 230 <10 <10 280 97 102 12.3 1.0 - 0.2 0.4 <10 <50 <10 <20 <1.1 Faulkner 5/31/2006 943 570 7.5 302 83 23 78 2 230 <10 <10 280 99 100 12.5 <0.3 - 0.2 0.4 <10 <50 <10 QO <1.1 Faulkner 8/21/2006 955 610 7.5 284 79 21 76 1 230 <10 <10 280 97 99 12.3 <0.3 - 0.2 0.4 <10 <50 <10 <20 <1.1 Faulkner 11/14/2006 945 580 7.5 304 84 23 82 2 230 <10 <10 280 92 98 13.3 <0.3 - 0.2 0.38 <10 60 <10 QO 6.9 <1.1 Faulkner 2/13/2007 926 570 7.5 288 79 22 81 2 230 <10 <10 280 98 99 12.3 <0.3 - 0.3 0.33 <10 60 <10 <20 <1.1 - Faullmer 5/29/2007 867 520 7.5 276 76 21 79 2 220 <10 <10 270 88 84 11.9 <0.3 - <0.1 0.49 <10 70 <10 <20 <1.1 - Faulkner 8/14/2007 863 510 6.7 276 76 21 81 2 220 <10 <10 270 87 88 12.1 <0.3 - 0.2 0.47 <10 80 <10 QO <1.1 - Faulkner 11/26/2007 868 560 7.8 255 71 19 68 l 210 <10 <10 260 87 92 11.8 <0.3 - 0.1 0.4 <10 <50 <10 QO <1.1 - Faullmer 2/4/2008 871 510 7.7 276 76 21 77 2 210 <10 <10 260 94 91 11.8 <0.3 - 0.1 0.4 <10 <50 <10 <20 <1.1 <1.1 Faulkner 5/1/2008 867 540 7.4 264 73 20 74 1 200 <10 <10 240 92 91 9.9 <0.3 - 0.2 0.3 <10 60 <10 QO <1.1 <1.1 Faulkner 8/26/2008 869 540 6.9 254 69 20 75 2 210 <10 <10 250 91 88 9.8 <0.3 - 0.1 0.4 <10 60 <10 QO <1.1 <1.1 Faulkner 11/25/2008 882 510 8.0 262 72 20 76 2 200 <10 <10 250 92 94 11.2 <0.3 - 0.1 0.4 <10 80 <10 QO <1.1 <1.1 Faulkner 2/10/2009 8% 520 7.9 271 74 21 79 2 210 <10 <10 250 92 92 12.0 <0.3 - 0.1 0.4 <10 80 <10 <20 <1.1 <1.1 Faulkner 5/5/2009 884 540 8.1 274 75 21 78 2 200 <10 <10 250 92 96 12.6 <0.3 - 0.2 0.5 <10 60 <10 <20 <1.1 <1.1 Faulkner 8/4/2009 870 540 8.0 269 75 20 78 2 200 <10 <10 250 89 93 12.1 <0.3 - 0.2 0.4 <10 60 <10 QO <1.1 <1.1 Faulkner 11/23/2009 874 480 8.0 264 73 20 78 2 200 <10 <10 250 90 93 11.7 <0.3 - 0.2 0.4 <10 110 <10 <20 <1.1 <1.1 Faulkner 5/25/2010 853 510 7.4 264 73 20 77 2 190 <10 <10 230 90 94 9.9 <0.3 - 0.2 0.3 <10 70 <10 QO <1.1 <1.1 Faulkner 11/30/2010 856 530 7.3 269 75 20 75 2 200 <10 <10 240 85 88 9.4 <0.3 - 0.1 0.4 <10 <50 <10 QO <1.1 <1.1 Faulkner 5/23/2011 846 500 7.6 268 76 19 75 2 200 <10 <10 240 87 88 9.4 <0.3 - 0.2 0.4 <10 90 <10 <20 <1.1 <1.1 Faulkner 11/17/2011 832 450 7.9 267 74 20 81 2 200 <10 <10 240 86 85 8.1 <0.3 - 0.1 0.4 <10 <50 <10 QO <1.1 <1.1 Faulkner 5/31/2012 794 450 8.9 239 66 18 72 2 190 <10 <10 240 77 73 7.3 <0.3 - 0.1 0.4 <10 <50 <10 QO - - Faulkner 11/20/2012 810 470 7.3 260 73 19 71 2 200 <10 <10 250 80 75 7.7 <0.3 - 0.1 0.4 <10 <50 <10 <20 <1.1 <1.l Faulkner 5/20/2013 771 470 7.2 236 65 18 72 2 190 <10 <10 240 79 73 7.1 <0.3 - 0.2 0.4 <10 <50 <10 QO <1.1 <1.1 Faulkner 11/18/2013 834 490 7.2 254 69 20 59 2 200 <10 <10 250 91 86 13.0 <0.3 - <0.1 0.5 <10 100 <10 <20 <1.1 <1.1 Faulkner 5/14/2014 757 490 7.8 241 67 18 67 2 200 <10 <10 240 79.9 73 9.6 <0.3 - <0.1 0.4 <10 210 <10 8o <1.1 <1.1 Faulkner 11/12/2014 1,130 660 7.7 349 97 26 85 2 210 <10 <10 250 97 147 28.1 <0.3 - <0.1 0.4 <10 150 <10 80 <1.1 <1.1 Faulkner 5/26/2015 1,030 610 7.5 303 85 22 79 2 200 <10 <10 240 95 130 21.8 <0.7 - 0.1 0.4 <10 210 <10 60 <1.1 <1.1 Faulkner 11/17/2015 943 550 7.2 272 76 20 72 <1 200 <10 <10 240 90 108 16.1 <0.7 - 0.1 0.3 <10 160 <10 <20 <1.1 <1.1 Faulkner 5/24/2016 925 520 7.6 264 73 20 76 2 180 <10 <10 220 85 109 12.5 <0.7 - 0.2 0.4 <10 50 <10 <20 <1.1 <1.1 Faulkner 11/8/2016 1,000 620 7.2 330 91 25 85 2 200 <10 <10 240 100 142 28.3 <0.7 - 0.1 0.4 <10 220 <10 <0 <1.1 <1.1 Faulkner 5/23/2017 853 510 7.5 241 67 18 76 1 180 <10 <10 220 89.2 98 13.2 <0.7 - 0.2 0.4 <10 400 <10 <20 <1.1 <1.1 Faulkner 11/20/2017 832 490 7.3 248 68 19 78 1 180 <10 <10 220 95.7 91 12.6 <0.7 - 0.2 0.4 60 270 10 80 <1.1 <1.1 Faulkner 5/21/2018 789 450 6.7 220 60 17 72 3 180 <10 <10 220 83.2 81 10.2 <0.7 - 0.2 0.4 <10 280 10 <20 <1.1 <1.1 Faulkner 11/14/2018 779 490 8.0 229 62 18 68 1 180 <10 <10 220 79.7 78 9.3 <0.7 - 0.2 0.4 30 <30 <10 30 <1.1 <1.I Faulkner 5/14/2019 Sly 490 7.0 235 66 17 71 2 180 <10 <10 220 83.3 81 9.8 <0.7 - 0.2 0.4 <10 170 <10 <20 <1.1 <l.l Faulkner 11/3/2019 782 450 7.9 219 58 18 66 2 180 <10 <10 220. 87.0 76 9.8 <0.7 - 0.2 0.4 <10 <30 <10 <20 <1.1 <1.1 Faulkner 5/20/2020 863 500 7.7 235 63 19 82 2 180 <10 <10 220 79.5 90 11.1 <0.7 - 0.2 0.5 40 80 <10 <20 <1.1 <1.1 Faulkner 11/24/2020 740 420 8.2 210 56 17 64 1 180 <10 <10 230 75.3 65 7.5 <0.7 - 0.2 0.4 <10 90 <10 20 <1.1 <1.1 Faulkner 5/19/2021 701 410 8.1 206 56 16 66 1 180 <10 <10 220 73.1 62 5.9 <0.7 - 0.2 0.4 10 130 <10 40 <1.1 <1.1 Page 4 of 10