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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 Mg Na K Alkalinity OH CO3 HCO3 SO4 CI NO3 NO2 P F B CU Fe Mn Zn 3'o1a1 Feaal Point Date (u5/ ) as C.0O3 as CaCO3 aOH as COJ as HCO3 as NOl nNO2 lue/L) IuvJLI lue/L) (ue/Ll (M11PN/100 mL1 Maalmnm Contaminant 65_to Level' 900' 500' 85* - - 250" 250' 45 3 2 1,000• 300' SO- 5,000• - - Hall 3/1/1994 1,020 570 7.5 259 70 20 94 ND 216 ND ND 264 51 108 14.9 ND ND 0.3 0.5 ND ND ND ND Absent -- Hall 6/1/1994 930 590 75 290 73 27 99 ND 220 ND ND 270 58 100 16 ND ND ND 0.5 ND ND ND ND Absent - Hall 10/4/1994 1,000 570 75 280 73 23 91 ND 210 ND ND 250 61 120 21 ND ND ND 0.5 ND ND ND ND Absent -- Hall 1/19/1995 980 550 7.5 290 74 23 90 ND 230 ND ND 280 66 130 23 ND ND 0.1 0.5 ND ND ND ND Absent --- Hall 4/26/1995 980 570 TO 280 73 23 88 ND 220 ND ND 270 62 140 21 ND ND 0.1 0.5 ND ND ND 50 Absent -- Hall 7/6/1995 990 600 7.5 300 79 24 M ND 230 ND ND 280 73 130 25 ND ND ND 0.5 ND ND ND ND Absent -- Hall 11/11/1995 1,000 620 7.4 300 79 24 95 ND 280 ND ND 340 66 140 26 ND ND ND 0.5 ND ND ND ND Absent -- Hall 1/11/1996 1,000 610 74 290 76 24 95 ND 290 ND ND 350 60 150 26 ND ND 0.3 0.5 ND ND ND ND Absent --- Hall 52/1996 1,000 560 74 300 78 26 99 2 230 ND ND 280 69 150 25 ND ND 0.6 0.5 ND ND ND ND Abseat --- Hall 7/10/1996 1,000 640 7.4 310 81 27 89 2 230 ND ND 280 70 160 31 ND ND 03 0.5 ND ND ND ND Absent --- Hall 10/16/1996 1,000 610 74 310 83 26 100 2 230 ND ND 280 71 150 29 ND ND ND ND ND ND ND ND Absent -- Hall 121/1997 1,000 640 7.6 308 82 25 92 2 210 ND ND 260 71 160 28 ND ND 0.2 0.5 ND ND ND ND Absent -- Hall 4/9/1997 1,000 600 6.1 310 85 24 90 2 210 ND ND 250 68 160 29 ND ND 06 0.5 ND ND ND ND 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 ND ND ND Absent -- Hall 10/16/1997 1,100 660 7.5 310 84 25 100 4 230 ND ND 280 74 160 28 ND ND 04 06 ND ND ND ND Absent -- Hall 127/1998 1,100 830 7.5 310 85 25 92 2 220 ND ND 270 76 150 27 ND ND 0.2 0.5 ND ND ND ND Absent -- Hall 5/5/1998 1,000 620 7.7 300 81 24 96 1 220 ND ND 270 70 140 25 ND ND 02 0.5 ND ND ND ND Absent - Hall 8/4/1998 1,000 610 7.7 300 81 24 97 2 210 ND ND 260 86 130 22 ND ND 02 0.5 ND ND ND ND Absent -- Hall 11/4/1998 1,000 630 7.6 310 82 25 93 2 220 ND ND 270 68 130 20 ND - 02 0.4 ND ND ND ND Absent - Hall 2/2/1999 1,000 630 7.3 310 83 24 92 2 230 ND ND 280 65 130 19 ND --- 0.2 0.4 ND ND ND ND Absent -- Hall 5/11/1999 1,000 600 74 310 83 24 89 2 250 ND ND 300 74 130 23 ND -- 02 0.5 100 ND ND 130 Absent -- Hall 8/18/1999 1,020 600 74 299 82 23 90 2 240 ND ND 290 65 132 20.5 ND -- 0.1 0.5 ND ND ND ND Absent - Hall 11/17/1999 1,020 600 79 311 85 24 88 2 230 ND ND 280 70 138 21.4 ND -- 0.3 0.5 ND ND ND ND Absent - Hall 2/24/2000 1,000 620 7 298 80 24 95 2 220 ND ND 260 73 143 22.6 ND - 0.2 0.5 ND ND ND 70 Absent --- Hall 5/162000 1,030 610 6.9 273 73 22 90 2 220 ND ND 270 72 142 21.4 ND --- 02 0.5 ND ND ND ND Absent -- Hall 9/7/2000 1,070 630 7.3 289 78 23 99 2 220 ND ND 270 74 152 23.9 ND - 0.2 05 ND ND ND ND Absent -- Hall 11/28/2000 1,080 630 7 298 80 24 97 2 220 ND ND 270 72 147 23.8 ND -- ND 0.54 ND ND ND ND Absent --- Hall 2/212001 1,030 610 69 284 76 23 95 2 220 ND ND 270 73 137 21.9 ND -- 0.1 0.53 ND ND ND 30 Absent -- Hall 5232001 1,010 590 6.9 296 79 24 95 2 230 ND ND 280 70 136 20.7 ND - ND 0.5 ND ND ND ND Absent -- Hall 8282001 1,010 640 7.6 271 74 21 91 2 230 ND ND 280 70 129 20.5 ND -- 0.2 046 ND ND ND ND Absent -- Hall 12/112001 998 580 7.3 284 76 23 89 2 230 ND ND 280 67 126 195 ND -- 0.1 047 ND ND ND 40 Absent -- Hall 3/122002 980 590 7.1 264 68 23 90 2 230 ND ND 280 63 128 18.9 ND --- ND 0.47 ND ND ND ND Abscot -- Hall 6/19/2002 959 570 74 268 71 22 87 2 230 ND ND 280 59 123 16.9 ND --- 0.1 0.47 ND ND ND ND Absent -- Hall 817/2002 958 590 7.4 266 72 21 86 2 230 ND ND 280 52 119 16 ND - 0.1 0.43 ND ND ND ND Absent -- Hall 10/22/2002 967 590 7.8 289 78 23 92 2 230 ND ND 280 61 128 19.4 ND -- 0.2 0.5 ND ND ND ND Absent -- Hall 1/28/2003 973 590 8 287 77 23 86 2 230 ND ND 280 65 133 199 ND -- O.1 0.51 ND ND ND ND Absent --- Hall 4/29/2003 9.57 580 73 273 73 22 95 2 230 ND ND 270 63 128 20.6 ND - ND 0.5 ND ND ND ND Absent -- Hall 8/13/2003 955 570 7.4 268 71 22 89 2 230 ND ND 280 63 123 18.5 ND - 03 0.47 ND ND ND ND Absent -- Hall 11/19/2003 949 600 7.1 270 72 22 86 2 230 ND ND 280 58 124 12.3 ND - 0.3 0.5 ND 80 ND ND Absent -- Hall 2/17/2004 941 550 TO 256 68 21 85 2 220 <IO <10 270 58 122 17.9 10.3 - 03 0.4 <10 <50 <IO <20 <I.1 --- Hall 5/18/2004 936 MO 6.9 264 71 21 87 2 230 <10 <10 280 61 110 17.4 <0.3 - 02 0.5 <10 <50 <10 <20 <1I -- IIIaQU15 Palle 1.0