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Appendix C-Historical Water Quality City of Lathrop Consolidated Treatment Facility Monitoring and Reporting Program R5-2016-0028-03 Rev3 KMW-11 Total Date Coliform EC DO ORP Hard- Calcium Magnesium Potassium Sodium Manganese Barium Nickel Zinc Bromide Chloride Fluoride Sulfate 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) (mg/L) (mg/L) (mg/L) (mg/L) (mg/L) (per 100 (mg/L) mL 12/15/2015 6.78 123 4A11 0.37 -76 2,750 1,020 239 104 12 591 5.98 4.06 0.082 NA NA 2.77 600 NA 750 12/15/2015 6.78 >23 4.411 0.37 -76 2.890 1.040 240 107 12 642 7.29 4.14 0.082 NA NA 2.97 630 NA 760 2/4/2016 7.07 ND 4.093 0.88 -37 2.790 NA NA NA NA 548 3.80 4.09 NA NA NA 3.06 564 NA NA 4/21/2016 7.29 ND 4.124 0.47 -89 2.740 970 238 91 9 603 4.73 4.65 NA NA NA 2.81 690 NA 791 8/8/2016 6.55 ND 4.546 0.16 55 3.040 1.050 248 104 9 578 9.19 5.12 NA NA NA 4.01 681 NA 792 11/2/2016 7.3fi 4.5 4.820 0.90 45 3.210 1.050 248 104 8 739 9.45 5.05 NA NA NA 3.95 850 NA 780 1/16/2017 6.66 4.5 4.352 0.25 -44 2.980 990 245 91 7 820 5.2 4.96 NA NA NA 3.62 880 NA 960 5/8/2017 6.45 ND 4.204 1.07 -17 2.760 940 225 93 7 615 8.02 5.07 NA NA NA 3.55 640 NA 788 5/8/2017 6.45 ND 4.204 1.07 -17 2.810 940 226 92 7 635 7.98 5.06 NA NA NA 3.59 633 NA 776 9/11/2017 6.2 ND 4.540 0.26 -10 3.050 1.060 259 101 9 750 10.1 5.66 NA NA NA 4.17 770 NA 908 11/28/2017 7.08 ND 4.447 0.28 47 3.000 1.030 258 94 7 572 5.89 5.32 NA NA NA 3.61 741 NA 757 11/28/2017 7.08 ND 4.447 0.28 47 2.970 1.030 255 95 7 587 5.75 5.19 NA NA NA 3.56 733 NA 752 5/2/2018 6.45 ND 4.888 0.95 110 3.240 NA NA NA NA 648 NA NA NA NA NA 4.52 866 NA NA 11/7/2018 6.33 ND 4.510 0.12 -62 2.940 1.000 246 93 8 658 8.19 4.72 NA NA NA 3.83 840 NA 710 5/2/2019 6.41 ND 5.004 0.18 -16 3.210 NA NA NA NA 713 NA NA NA NA NA 4.08 910 NA NA 10/31/2019 6.50 ND 4.688 0.23 -29 3.110 1.170 274 119 9 596 NO 5.47 NA NA NA 3.99 753 NA 808 5/12/2020 6.55 ND 4.9fi6 0.08 -8 3.550 NA NA NA NA 812 NA NA NA NA NA 3.15 900 NA NA 11/4/2020 6.46 ND 5.099 0.13 46 3.470 1.270 288 134 13 635 10.2 6.07 NA NA NA 3.57 847 NA 940 5/3/2021 6.55 7.8 4.762 0.15 41 3.450 NA NA NA NA 707 NA NA NA NA NA 3.8 880 NA NA 10/19/2021 6.69 ND 4.350 0.32 -15 3.090 1.150 297 100 9 560 5.11 4.99 NA NA NA 3.23 704 NA 819 5/2/2022 6.58 ND 5.525 0.21 47 3.820 NA NA NA NA 767 NA NA NA NA NA 3 880 NA NA 11/9/2022 6.78 ND 4,546 0.3 18 2,910 980 259 80 7 694 2.84 3.49 NA NA NA 2.72 687 NA 808 4/3/2023 6.95 ND 3 900 0.27 4 3 020 NA NA NA NA 443 NA NA NA NA NA 3.20 774 NA NA ND is"not detected". NA is"not analyzed". City of Lathrop-KMW-11 City of Lathrop-KMW-11 Total Dissolved Solids NO,Nitrogen 5,000 25 4,000 20 d 3,000 15 E E p 2,000 10 z 1,000 5 0 0 �m9AAAWW�»»»»»»»> tttttgggggggggg>;>?>>>;>?t'tttt Date Date EKI Environment&Water,Inc. July 2023 Page 157 of 281 EKI B90088.03