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' K L E I N F E L D E R TABLE 1(continued) Concentrations of Selected Constituents in Groundwater Former Spreckels Sugar Plant No.2 18800 South Spreckels Road Manteca,California Carbonate Specific Monitoring Well Sample pH TD6 Bicarbonate Alkalinity Chlodde Nltirate as N Sulfate Conductivity Calcium Sodium g Date (pH Units) (mglp Alkalinity(mgll) (mgll) (mg/l) (mgll) (mgll) (umhaslcm) (mglq (mg/l) MW-3r 5/12/2000 7.28 653 356 ND 31.3 34.5 36.6 1030 97.6 69.5 7/1212000 7.1 632 398 ND 29.8 30.5 35.9 1010 88 64.4 91262000 T35 540 297 ND <10 27.7 30.3 44.8 942 85.2 54.1 3212001 7.3 640 366 ND <10 40 111 61.4 1070 %.3 83.6 9/142001 7A 580 250 ND <10 22 542 75 760 100 41 12/1912001 7.36 540 280 ND <10 20 27.1 85 910 86 50 ' 3/112002 142 500 280 ND <10 14 25 45 810 81 48 5/16/2002 7.33 450 250 ND <10 71 18 54 740141 74 31 11/13/2002 7.25 670 260 ND <1 18 24 130 970 100 46 5/22003 7.14 480 230 ND <5 B.B i6 89 760 82 30 10/82003 7.19 610 230 ND <10 21 19 160 900 100 39 6/14/2004 7.26 540 240 ND 10 14 28 100 90D BB 3] 11/812004 7.16 680 250 ND<5.0 22 40 ISD 1000 110 44 61292005 7.34 820 270 ND<5.0 20 39 130 1000 140 44 MW-5 11/311992 14 750 443 1.5 113 9 16 1220 102 95 1/1111993 B 920 490 1.5 156 ♦ 15 1470 143 106 8/1711993 7.2 1010 517 ♦ ♦ 39.97- • 1600 150 10/9/1993 ♦ ♦ ♦ ♦ • 35.90 11/5/1993 7.3 900 552 ♦ ♦ 3206^ ♦ 1450 140 823/1994 ].2 1080 67B 1.3 i6 6.32^ 193 1820 198 99 877/1995 7.3 1570883 1.3 236 12.42^ 18 2480 264 126 7/2/1996 8 1110 730 ♦ 153 442^ 16.4 1770 190 102 220/1997 7.3 710 360 ND 88 27.1^ 22 1100 170 77 10122/1997 7.3 710 360 ♦ 69 29 20 1100 93 81 3/1/1999 7.39 419 209 ND 40.3 17.9 20,7 6% 478 57.3 5/122000 7.7 388 148 ND 51.2 133 234 621 49.8 49.2 7/12/2000 7.66 342 155 ND 36.9 10.2 19.7 533 39.9 41.3 926/2000 7.49 342 162 ND(<10 47.0 10.2 20.8 567 41.4 41.3 3/212001 T6 361 155 ND <10 56.9 43.2 22.7 572 48.8 47.3 9/142001 7.71 340 160 ND <10 42 9.94 21 410 53 43 121192001 164 320 160 ND <10 55 11.7 25 620 46 36 3/11/2002 7.65 320 160 ND <10 53 12 23 620 53 43 5/76/2002 7.64 300 160 ND <10 32 9.3 20 500 39 37 ' 11/132002 7.53 450 190 NU101 1 77 1 17 31 760 71 49 5/512003 7.45 340 160 ND 10/812003 761 300 150 ND <10 25 9.5 21 500 44 29 6/152004 7.52 280 130 ND(10) 30 12 20 480 37 24 11/9/2004 7.53 350 150 ND<50 457 11 11 27 530 1 50 1 26 612912005 7.72 470 170 ND<5.0 63 13 27 1 640 71 35 1212212005 142 400 170 ND<5.0 46 13 29 1 520 54 31 5222006 147 340 150 ND <5.01 20 9.1 18 460 38 18 111]12006 7.35 380 160 ND <5.0 34 11 24 560 53 252 51212007 7.5 492 162 ND <5.0 53.1 13.8 31.1 647 58.7 28.6 101172007 176 420 150 ND <5.0 38 11 26 590 56 29 MW-6 7/1/1997 ].4 1300 420 ♦ 270 ♦ 180 2000 10/2211997 7 4 1500 450 ♦ 280 36 200 2200 190 100 31111999 7.64 850 351 ND 143 226 174 1430 124 85.2 MW4r 4/29/1999 7.11 1610 514 ND 267 32.5 198 2240 233 108 5112/2 7.06 1550 659 ND 274 31.6 199 2300 237 108 711M D0 7.44 1510 568 ND 263 30.3 199 2330 222 106 9262000 7.27 1440 503 ND <10 315 36.6 246 2350 214 104 321/2001 7.24 7410 497 ND <10 289 129 248 2230 232 120 91142001 7.32 1300540 ND <70 240 22.12 19 1900 200 120 12/192001 7.16 1300 650 ND 00 270 22.6 190 2300 210 130 3/11/2002 7.22 1300 660 ND 220 20 160 2200 210 130 511162002 7.16 1300 620 ND <10 220 22 1B0 2100 190 120 11/1312002 7.18 1200 540 ND <1 210 18 220 1800 180 120 5122003 7.01 1200 570 ND 00 190 17 210 1900 170 110 101812003 ].11 1100 460 ND <10 140 15 210 7700 150 100 611412004 -7.13 890 480 ND(<10 130 9.9 120 1600 120 120 11/82004 7.08 850 530 ND(<50 110 10 97 1400 130 97 6292005 7.39 780 420 ND(<50 73 11 1 89 1 1200 I 110 82 12005 7.25 700 470 ND(<5071 11 79 1700 100 80 5/222006 7.18 700 410 ND <SO 66 8.2 69 1100 79 63 221 11!72005 7.21 660 390 ND <5.0 69 B.7 68 1100 89.5 81.fi 527/2007 7.5 651 363 ND <5.0 32.4 4.D 32.0 11200 0 61.7 64.3 -Toil82007 766 700 400 ND <5.0 59 11.0 630 1100 95 79 20-3978-03 MNTSTOBR117 Page 2 013 Copydgh1200B Kleinfelder February 1,2008