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Table 4 Historical Groundwater Quality Record Teichert Aggregates and Granite Construction-Vernalis Area, San Joaquin County (ail units in mg/L,unless otherwise specified) 'total Total Coliform Sampling VC TDS ptl llardness Ca Mg tin h : lkaliniti 011 ('03 IICO3 SO4 ('I NO3 NO2 P F B Cu Fe Nln Zn Total Fecal Point Date (pS/cm) as CaCO3 as(A03 as Off as(03 as 11(03 as NO3 as NO2 (pg/L) (pg/1.) (pg/l-) (pg/L) (MPN/100 mL) 6.5 to Maximum Contaminant Level' 900* 500* 8.5* 250* 250* 45 3 2 1,000* 300* 50* 5,000* Brown's New 5/23/2001 865 580 6.8 286 75 24 81 2 200 ND ND 250 186 39 7.8 ND - 0.1 1.2 10 680 30 20 - - Brown's New 11/23/2009 850 540 8.0 261 70 21 82 2 200 ND ND 240 181 38 8.5 <0.3 - 0.2 1.2 <10 140 <10 <20 - - Brown's New 5/25/2010 833 520 7.4 261 70 21 81 2 190 ND ND 230 180 38 8.9 <0.3 - 0.2 1.1 <10 110 <10 <20 - - Brown's New 11/30/2010 822 560 7.4 268 71 22 76 2 180 ND ND 220 170 36 8.3 <0.3 - 0.1 1.1 70 4,530 70 20 - - Brown's New 5/23/2011 832 540 7.2 259 69 21 75 2 180 <10 <10 220 177 36 9.1 <0.3 - 0.2 1.1 300 16,700 300 60 - - Brown's New 11/17/2011 833 510 8.0 266 72 21 84 2 180 <10 <10 220 178 38 10.2 <0.3 - 0.2 1.1 <10 440 10 <20 - - Brown's New 5/31/2012 843 510 7.7 268 71 22 82 2 180 <10 <10 220 175 38 9.4 <0.3 - 0.2 1.1 <10 60 <10 <20 -Brown's New 11/20/2012 834 550 7.9 278 75 22 77 2 180 <10 <10 230 171 37 9.8 <0.3 - 0.2 1 <10 520 <10 80 - Brown's New 5/20/2013 813 540 7.7 270 72 22 82 2 180 <10 <10 230 171 36 10.3 <0.3 - 0.2 1.1 <10 330 10 50 - Brown's New 11/18/2013 823 510 7.5 241 57 24 73 2 160 <10 <10 190 210 46 1.1 <0.3 - 0.2 1.4 30 1,010 30 830 - Brown's New 5/14/2014 806 550 7.6 233 52 25 96 3 150 <10 <10 180 203 45 2.4 <0.3 - <0.1 1.3 500 5,380 130 1,010 - Brown's New 11/12/2014 724 430 7.8 156 28 21 86 2 190 <10 <10 240 197 45 1.6 <0.3 - 0.4 1.1 <10 540 <10 550 - Brown's New 5/26/2015 834 530 7.7 242 64 20 79 2 170 <10 <10 210 174 37 8.9 <0.7 - 0.2 1 30 660 <10 370 - Brown's New 11/17/2015 839 540 7.1 243 66 19 72 1 190 <10 <10 230 174 36 8.8 <0.7 - 0.2 0.9 20 310 <10 <20 - - Brown's New pump contractor working on well,no sample obtained - - Brown's New 11/8/2016 813 520 7.3 256 68 21 77 2 140 <10 <10 170 177 39 10 <0.7 - 0.2 1.1 <10 500 30 <20 - - Brown's New 5/23/2017 836 550 7.4 256 68 21 76 2 180 <10 <10 230 178 39 9.9 <0.7 - 0.2 1.1 <10 70 21 <0 - Brown's New 11/20/2017 1,480 1,120 7.8 475 126 39 88 2 130 <10 <10 160 178 287 <11 -1.28 - 2.2 1.1 <10 10,000 14,100 30 - Brown's New 5/21/2018 822 540 61 244 65 20 72 3 180 <10 <10 220 175 39 10.6 <0.7 - 0.4 1.1 <10 260 20 QO - - Brown's New 11/14/2018 803 540 8.0 277 73 23 72 1 190 <10 <10 230 180 38 8.8 <0.7 - 0.2 1.1 <10 70 <10 QO - - Brown's New 5/15/2019 855 510 7.4 266 72 21 71 2 180 <10 <10 220 168 37 13.4 <0.7 - 0.2 0.9 80 7,340 290 <20 - - Browns New 11/26/2019 907 540 7.8 239 63 20 69 2 190 <10 <10 230 180 39 8.6 <0.7 - 0.2 1.1 <10 550 <10 20 - - Brown's New 5/20/2020 909 550 7.6 265 70 22 79 2 190 <10 <10 240 178 38 9.2 <0.7 - 0.2 1.1 40 50 <10 60 - - Brown's New 11/24/2020 835 540 8.4 267 69 23 72 2 190 <10 <10 230 177 38 11.3 <0.7 - 0.2 1.0 <10 140 <10 <20 - - Brown's New 5/19/2021 854 540 8.0 260 68 22 75 2 190 <10 <10 230 183 39 8.7 <0.7 - 0.2 1.1 <10 120 <10 <20 - - Brown's New 11/22/2021 878 616 7.7 246 64 21 72 2 190 <10 <10 230 179 38 9.6 <0.7 - 0.2 1.0 <10 40 <10 <20 - - Brown's New 5/25/2022 no power to well pump,no sample obtained Brown's New 11/15/2022 831 530 7.3 263 69 22 73 1 190 <10 <10 230 179 39 10.5 <0.7 - 0.3 1.1 <10 30 <10 30 - - Brown's#1 3/1/1994 960 580 7.5 277 70 25 83 ND 195 ND ND 238 171 41 12.2 ND ND 0.2 1.1 ND ND ND 100 - - Browus#1 6/1/1994 850 500 7.4 330 68 33 94 ND 200 ND ND 240 150 30 12 ND ND ND 1.2 ND ND ND ND - - Brown's#1 10/4/1994 900 550 7.5 290 71 26 84 ND 204 ND ND 250 160 42 12 ND ND 0.1 1.1 ND ND ND ND - - Brown's#1 1/19/1995 850 540 7.5 290 68 29 72 2 190 ND ND 230 130 68 30 ND ND 0.2 1 ND 400 ND 60 - - Brown's#1 4/26/1995 900 580 8 310 70 32 70 ND 210 ND ND 250 180 43 22 ND ND 0.2 1 - 3,200 30 190 - - Brown's#1 1/11/1996 870 580 7.6 290 67 30 76 ND 260 ND ND 310 170 41 17 ND ND 0.2 1.1 ND 9,300 130 190 - - Brown's#1 5/2/1996 880 540 7.3 320 68 36 80 3 220 ND ND 260 190 50 16 ND ND 0.6 1.1 ND 5,800 190 580 - - Brown's#1 1/21/1997 870 560 7.7 311 72 32 73 3 210 ND ND 250 200 45 16 ND 0.5 0.2 1.2 ND 4,900 110 130 - - Brown's#1 4/9/1997 880 560 6.6 320 77 32 74 2 210 ND ND 260 190 47 15 ND ND 0.9 1.2 ND 2,700 60 50 - - Browns#1 7/3/1997 870 680 7.5 320 76 32 78 3 210 ND ND 250 190 43 14 ND ND 0.3 1.2 ND ND ND ND - - Brown's#1 10/16/1997 850 550 7.6 290 68 29 76 6 210 ND ND 260 180 40 13 ND ND 0.4 1.3 ND 740 ND ND - - Brown's#1 1/27/1998 860 530 7.5 290 69 29 69 2 220 ND ND 270 170 40 16 ND 0.5 0.2 1.2 NO 1,500 ND 80 - - Brown's#1 8/4/1998 850 550 7.8 290 68 29 76 3 200 ND ND 250 170 39 15 ND ND 0.2 1.2 ND 410 ND ND - - Brown's#1 11/4/1998 860 510 7.5 300 70 30 74 3 210 ND ND 250 180 37 12 ND - 0.2 1.1 ND 690 ND ND - - Brown's#1 2/2/1999 900 600 7.5 310 73 31 75 2 210 ND ND 260 180 38 12 ND - 0.2 1.1 ND 1,300 ND ND - - Page 8 of 10