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Appendix C-Historical Water Quality City of Lathrop Consolidated Treatment Facility Monitoring and Reporting Program R5-2016-0028-03 Rev3 MWM-8 Total Data Coliform EC DO ORP Hard- Calcium Magnesium Potassium Sodium Manganese Barium Nickel Bromide Chloride Fluoride Sulfate Sampled pH Bact1eria 00 (uS/cm) (mg/L) (mV) TDS(mg/L) nesL (mg/L) (mg/L) (mg/L) (mg/L) Iron(mg/L) (mg/L) (mg/L) (mg/L) Zinc(mg/L) (mg/L) (mg/L) (mg/L) (mg/L) mg/) ml- 5/19/2005 7.25 500 2,300 -- -- 1,500 NA 160 90 3.2 225 ND 3.24 0.19 NO 0.011 1.4 640 ND 160 6/27/2005 7.06 300 3,100 - - 1,800 NA 220 110 ND 230 0.160 3.70 0.45 ND ND 1.8 800 ND 170 6/27/2005 6.86 300 3,100 - - 1,800 NA 230 110 ND 220 0.150 4.00 0.23 ND ND 1.8 790 ND 170 11/1/2005 6.95 ND 2,532 0.25 31 1,600 670 140 76 3.5 260 0.035 2.20 0.10 0.006 0.002 1.3 510 0.42 230 2/6/2006 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS 5/2/2006 6.59 2 3,564 0.04 104 2,400 980 210 110 7.9 380 ND 2.30 0.10 0.011 ND 2.2 890 0.35 260 8/8/2006 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS 10/24/2006 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS 2/1/2007 NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS 11/27/2017 7.03 NA 2,960 0.38 119 1,760 740 158 84 3.0 297 ND 2.61 NA NA NA NA 565 NA 248 5/4/2018 6.94 NA 2,905 0.64 88 1,730 NA NA NA NA 310 NA NA NA NA NA 1.39 570 NA NA 11/8/2018 6.81 ND 2,563 0.16 165 1,520 650 141 72 4.0 246 ND 2.05 NA NA NA NA 437 NA 208 4/29/2019 6.88 ND 2,790 0.45 196 1,640 NA NA NA NA 281 NA NA NA NA NA 1.13 540 NA NA 10/29/2019 6.80 NA 2,725 0.30 196 1,630 650 139 73 4.0 279 ND 2.22 NA NA NA NA 469 NA 231 5/8/2020 6.90 NA 2,430 0.18 228 1,680 NA NA NA NA 245 NA NA NA NA NA NA 460 NA NA 11/2/2020 6.83 NA 2,450 0.14 -19 1,680 690 149 77 5.0 251 0.050 2.16 NA NA NA NA 425 NA 212 5/4/2021 6.89 NA 2,732 1.12 144 1,650 NA NA NA NA 282 NA NA NA NA NA NA 500 NA NA 10/29/2021 6.80 NA 2,669 0.34 265 1,550 660 144 74 3.0 252 ND 2.39 NA NA NA NA 420 NA 195 5/4/2022 6.72 NA 2,589 0.75 118 1,600 NA NA NA NA 258 NA NA NA NA NA NA 410 NA NA 5/4/2022 6.72 NA 2,589 0.75 118 1,600 NA NA NA NA 258 NA NA NA NA NA NA 410 NA NA 31202 NA 2,6706 032 213 , 2 2 005 227 NA NA NA NA 431 NA 2119 8 NA NA10/72 NA .3/2/02 % 7 0 N NS indicates that well was not sampled during regular quarterly monitoring. ND is"not detected". NA is"not analyzed". City of Lathrop-MWM-8 City of Lathrop-MWM-8 Total Dissolved Solids NO,Nitrogen 5,000 20 4,000 15 a 3,000 E E 0 2,000 i 10 r 1,000 5 0 0 �-,Date 'Date EKI Environment&Water,Inc. July 2023 Page 37 of 281 EKI B90088.03