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Appendix C-Historical Water Quality City of Lathrop
<br /> Consolidated Treatment Facility
<br /> Monitoring and Reporting Program 115-2016-0028-03 Rev3
<br /> MWR-28 continued
<br /> Total
<br /> Date Coliform EC DO ORP Hard- Calcium Magnesium Potassium Sodium Manganese Barium Nickel Bromide Chloride Fluoride Sulfate
<br /> Sampled pH Bacteria (uS/cm) (mg/L) (mV) TDS(mg/L) mess (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)
<br /> (per 100 (mg/L)
<br /> mL
<br /> 4/22/2014 6.81 ND 6,193 0.07 128 4,070 2,050 472 212 7.0 606 0.20 9.57 NA NA NA 3.50 1,600 NA 730
<br /> 7/30/2014 6.79 17 6,131 0.14 115 4,840 2,140 485 226 7.0 565 0.20 11.9 NA NA NA 3.77 1,650 NA 740
<br /> 10/28/2014 6.77 2 6,554 0.23 41 4,540 2,350 540 245 8.0 574 0.23 12.9 NA NA NA 3.53 1,720 NA 910
<br /> 1/27/2015 6.80 NO 6,603 0.60 44 4,990 2,130 496 218 6.0 546 NO 12.9 NA NA NA 4.97 1,650 NA 860
<br /> Groundwater Limitations in Groundwater Limitations Compliance Plan,Se tmber 30,2015
<br /> 0 12.2 4,289 422 218 11 509 3 5 1,400 834
<br /> 1011111011 6.14 ND 7,103 177 4,800 2,290 5 238 8.0 611 D 11.2 NA NA NA 4.47 1,620 NA 810
<br /> 1.0 390 A 5 14/25/2016 7.13 ND 5772 6 14 NA N NA NA 93 NA NA NA NA NA 27 490
<br /> NA NA
<br /> Revised Groundwater Limitations in Groundwater Limitations Con liance Plan,August 1,2016
<br /> 2.2 5,326 2,390 11 632 0.3 14 1,831 943
<br /> 10/311 016 7.50 4.5' 6,145 1.72 2 4,270 1,950 461 194 6.0 618 0.05 9.31 NA NA NA 348 1,550 NA 19
<br /> 5/5/2017 6.64 ND 5,606 0.20 164 3,610 NA NA NA NA 594 NA NA NA NA NA 2k3 1,380 NA NA
<br /> 11/30/2017 7.20 23 6,296 0.58 121 4,130 2,070 486 208 7.0 642 ND 9.66 NA NA NA 2.82 1,600 NA 740
<br /> 5/3/2018 6.65 ND 6,465 3.78 97 4,820 NA NA NA NA 626 NA NA NA NA NA 3.06 1,530 NA NA
<br /> 11/6/2018 6.80 110 5,710 0.14 2 4,010 2,020 542 162 8.0 759 ND 8.99 NA NA NA ND 1,440 NA 710
<br /> 4/30/2019 6.97 NO 5,852 0.55 94 3,780 NA NA NA NA 943 NA NA NA NA NA 2.02 1,250 NA NA
<br /> 10/30/2019 6.83 59.4 5,340 0.22 19 3,380 1,450 342 146 8.0 503 ND 6.40 NA NA NA 1.91 1,060 NA 605
<br /> 5/11/2020 7.01 NO 4,564 0.09 176 3,440 NA NA NA NA 773 NA NA NA NA NA 1.18 1,080 NA NA
<br /> 11/6/2020 694 13.0 4,535 0.13 80 3,190 1,310 293 142 5.0 556 0.04 0.48 NA NA NA 1.42 904 NA 490
<br /> 5/5/2021 6.96 34.0 4,723 0.21 115 3,160 NA NA NA NA 750 NA NA NA NA NA 1.46 980 NA NA
<br /> 10/18/2021 7.05 >7600 3,914 0.56 115 3,030 1,180 274 120 5.0 460 0.17 9.07 NA NA NA 1.31 811 NA 449
<br /> 5/3/2022 6,86 4.0 4,215 0.34 30 2,630 NA NA NA NA 489 NA NA NA NA NA 1.70 810 NA NA
<br /> 10/31/2022"" NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS NS
<br /> 3/27/2023 7.11 33 2,780 2.29 334 L720 NA NA NA NA 265 NA NA NA NA NA 1.08 520 NA NA
<br /> Well was resampled for Total Coliform on 11/11/2016 due to lab error on the original sample.
<br /> ""Well not sampled on 10/31/2022 due to insufficent volume to sample.
<br /> ND is"not detected'.
<br /> NA is"not analyzed'.
<br /> "NS is"not sampled'.
<br /> Concentrations in bold exceed the Groundwater Limitation.
<br /> EKI Environment&Water,Inc.
<br /> July 2023 Page 234 of 281 EKI B90088.03
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