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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 pH Hardness Ca Nlg Na K Alkalinity OH CO3 HCO3 SO4 Cl NO3 NO2 P F R Cu Fe Mn Zn Total Fecal Point Date (RS/CM) as CaCO3 as CaCO3 as OH as('03 as HCO3 as NO3 as NO2 (pg/L) (pg/I-) (pg/L) (µg/l,) (NIP./100 mL) 6.5 to Maximum Contaminant Level' 900* 500* 8.5* - - - - - - - - 250* 250* 45 3 - 2 - 1,000* 300* 50* 5,000* S.Tracy#1 1/19/1995 800 500 7.5 290 62 25 73 ND 150 ND ND 190 120 68 42 ND ND 0.3 1 ND 390 ND ND S.Tracy#1 4/26/1995 800 520 7.6 240 58 23 70 ND 160 ND ND 200 120 51 45 ND ND 0.3 1 ND ND ND ND -S.Tracy#1 7/6/1995 810 520 7.5 260 65 23 69 3 170 ND ND 210 130 64 42 ND ND 0.1 1 ND ND ND ND -S.Tracy#1 11/11/1995 790 510 7.5 240 60 23 77 ND 180 ND ND 210 120 68 47 ND ND 0.2 0.9 ND ND ND ND -S.Tracy#1 1/11/1996 790 520 7.4 230 58 22 72 ND 190 ND ND 230 110 64 45 ND ND 0.7 1 ND 200 ND ND -S.Tracy#13 5/2/1996 800 470 7.4 260 59 28 74 3 170 ND ND 210 130 69 45 ND ND 0.5 1 ND ND ND ND -S.Tracy#1 7/10/1996 820 520 7.6 260 62 26 68 2 180 ND ND 210 130 66 47 ND ND 0.2 0.9 ND ND ND ND -S.Tracy#1 10/16/1996 800 480 7.3 250 61 25 73 3 170 ND ND 210 120 68 46 ND ND 0.2 ND ND 330 ND ND -S.Tracy#1 1/21/1997 790 500 7.8 244 60 23 66 2 160 ND ND 190 110 59 44 ND ND 0.2 1 ND 120 ND ND -S.Tracy#1 4/9/1997 790 500 6.6 250 64 23 72 2 170 ND ND 200 120 73 48 ND ND 0.5 1 ND ND ND ND -S.Tracy#1 7/3/1997 790 550 7.3 260 64 24 69 1 170 ND ND 200 130 66 42 ND ND 0.3 1 ND ND ND ND -S.Tracy#1 1/27/1998 800 460 7.4 240 60 22 66 2 160 ND ND 190 120 65 41 ND ND 0.3 1 ND 90 ND ND -S.Tracy#1 5/5/1998 800 520 7.6 250 61 23 71 2 160 ND ND 200 120 67 43 ND ND 0.3 1 ND ND ND ND -S.Tracy#1 8/4/1998 800 520 7.8 250 64 23 70 1 150 ND ND 190 120 68 44 ND ND 0.2 1 ND ND ND ND -S.Tracy#1 11/4/1998 810 480 7.5 250 62 23 72 2 160 ND ND 190 120 67 40 ND - 0.2 0.9 ND ND ND ND -S.Tracy#1 2/2/1999 800 530 7.3 250 62 23 70 2 160 ND ND 200 110 63 40 ND - 0.3 0.9 ND ND ND ND -S.Tracy#1 8/18/1999 804 490 7.7 245 62 22 69 1 160 ND ND 200 114 61 41.3 ND - 0.4 0.9 ND ND ND ND -S.Tracy#1 11/17/1999 808 470 7.4 253 65 22 64 2 160 ND ND 200 121 64 41.5 ND - 0.4 I ND ND ND ND -S.Tracy#I 9/7/2000 847 530 7.2 248 63 22 78 2 160 ND ND 200 129 66 45.3 ND - 0.3 0.95 ND ND ND ND -S.Tracy#1 11/28/2000 835 500 7.2 248 63 22 71 2 248 ND ND 200 132 61 40.3 ND - 0.1 1.02 ND ND ND ND - - S.Tracy#1 2/21/2001 832 530 7 252 63 23 73 2 170 ND ND 200 144 63 40.5 ND - 0.2 0.98 ND ND ND ND - - S.Tracy#1 5/23/2001 842 530 7 266 67 24 73 2 170 ND ND 210 140 60 37.2 ND - 0.1 0.99 ND ND ND ND - - S.Tracy#1 8/28/2001 845 550 7.5 244 63 21 80 2 170 ND ND 210 145 59 37.1 ND - 0.3 0.91 ND ND ND ND - - S.Tracy#1 12/11/2001 832 580 7.2 257 65 23 71 2 170 ND ND 210 135 57 36.1 ND - 0.2 0.94 ND ND ND ND - - S.Tracy#1 3/12/2002 834 510 7.3 261 65 24 73 2 170 ND ND 210 144 61 35.6 ND - 0.1 0.93 ND ND ND ND - - S.Tracy#1 6/19/2002 838 550 7.6 262 67 23 70 2 170 ND ND 210 146 59 34.5 ND - 0.2 0.95 ND ND ND ND - - S.Tracy#1 8/7/2002 836 530 7.3 240 62 22 69 2 170 ND ND 210 132 57 34 ND - 0.2 0.87 ND ND ND ND - - S.Tracy#1 10/22/2002 832 540 7.8 259 66 23 73 2 180 ND ND 210 139 58 35.4 ND - 0.2 0.95 ND ND ND ND - - S.Tracy#1 1/28/2003 838 540 7.9 266 67 24 71 2 180 ND ND 220 146 59 35.6 ND - 0.2 1 ND ND ND ND - - S.Tracy#1 4/29/2003 850 560 7.4 262 67 24 76 2 180 ND ND 210 152 62 36.4 ND - 0.1 1.01 ND ND ND ND - - S.Tracy#1 8/13/2003 851 560 7.2 259 66 23 72 2 180 ND ND 220 142 57 36.1 ND - 0.4 0.98 ND ND ND ND - - S.Tracy#1 11/19/2003 844 580 6.5 248 68 25 78 2 180 ND ND 220 145 59 24.4 ND - 0.3 0.9 ND 2,800 30 350 - - S.Tracy#1 2/17/2004 837 510 7.3 257 65 23 72 3 170 <10 <10 210 142 61 35.9 <0.3 - 0.3 1.0 <10 <50 <10 <20 - - S.Tracy#1 5/18/2004 850 530 6.6 278 70 25 76 2 170 <10 <10 210 145 59 35.5 <0.3 - 0.3 1.0 <10 <50 <10 <20 - - S.Tracy#1 8/24/2004 848 540 6.7 271 69 24 76 2 180 <10 <10 220 148 58 34.5 <0.3 - 0.4 1.0 <10 <50 <10 <20 - - S.Tracy#1 12/2/2004 829 570 7.5 247 56 26 63 2 170 <10 <10 210 128 61 36.0 <0.3 - 0.6 0.7 <10 4,580 150 50 - - S.Tracy#1 2/23/2005 845 550 7.4 259 66 23 75 2 180 <10 <10 220 147 60 34.5 <0.3 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#1 5/11/2005 840 510 7.2 266 67 24 75 2 170 <10 <10 210 144 61 35.7 <0.3 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#1 8/30/2005 842 580 7.4 253 65 22 72 2 170 <10 <10 210 147 69 36.9 <0.3 - 0.3 0.9 <10 <50 <10 <20 - - S.Tracy#1 11/15/2005 837 590 7.2 250 64 22 72 2 170 <10 <10 210 146 59 34.3 <0.3 - 0.3 1.0 <10 <50 <10 <20 - - S.Tracy#1 2/15/2006 833 510 7.2 259 66 23 75 2 170 <10 <10 210 142 58 32.8 0.36 - 0.3 1.0 <10 <50 <10 QO - - S.Tracy#1 5/31/2006 861 530 7.5 257 65 23 73 2 160 <10 <10 200 146 67 38.7 <0.3 - 0.3 1.0 <10 <50 <10 30 - - S.Tracy#I 8/21/2006 864 530 7.5 245 62 22 72 2 160 <10 <10 190 139 67 39.8 <0.3 - 0.3 0.9 10 <50 <10 <20 - - Page 5 of 10