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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 /> RM W-4 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 /> 10/30/2012 7.16 17 1,613 2.12 244 1,010 560 104 74 2.0 121 ND ND NA NA NA 0.13 146 NA 69.0 <br /> 2/5/2013 7.32 NO 1,631 1.55 229 950 560 104 74 3.0 128 ND NO NA NA NA 0.12 173 NA 70.0 <br /> 2/5/2013 7.32 ND 1,631 1.55 229 950 560 104 74 3.0 129 ND ND NA NA NA 0.12 166 NA 69.0 <br /> 5/3/2013 7.29 NO 1,598 1.73 316 930 550 102 71 2.0 107 ND NO NA NA NA 0.16 151 NA 64.0 <br /> 8/6/2013 7.2 49 1,497 1.28 117 900 540 99 71 3.0 118 ND ND NA NA NA 0.20 160 NA 60.0 <br /> 11/22/2013 7.2 ND 1,536 2.86 204 880 550 102 71 3.0 124 NO NO NA NA NA 0.32 166 NA 51.0 <br /> 2/7/2014 7.17 NO 1,560 2.81 232 890 550 102 71 3.0 120 0.1 NO NA NA NA 0.54 166 NA 44.0 <br /> 4/29/2014 7.12 NO 1,549 2.34 290 890 560 105 73 3.0 119 0.08 NO NA NA NA 0.68 154 NA 41.2 <br /> 4/29/2014 7.12 NO 1,549 2.34 290 900 540 101 70 3.0 115 0.09 NO NA NA NA 0.66 166 NA 41.5 <br /> 8/1/2014 7.00 NO 1,528 3.93 307 840 540 101 71 3.0 120 0.07 NO NA NA NA 0.62 158 NA 36.4 <br /> 8/1/2014 7.00 NO 1,528 3.93 307 850 540 100 71 3.0 120 0.07 NO NA NA NA 0.71 153 NA 37.3 <br /> 11/3/2014 7.11 NO 1,457 4.24 193 860 490 93 64 3.0 111 0.10 NO NA NA NA 0.68 143 NA 35.0 <br /> 1/30/2015 7.24 NO 1,438 4.23 284 840 510 97 66 3.0 113 ND NO NA NA NA 0.51 140 NA 37.0 <br /> 10/28/2015 7.08 ND 1,448 4.42 123 830 480 93 60 3.0 108 ND ND NA NA NA 0.69 138 NA 36.0 <br /> 10/31/2016 7.62 7.8" 1,349 5.61 6 820 490 96 62 3.0 110 ND ND NA NA NA 0.48 128 NA 38.1 <br /> 11/11/2016 NA 4.5 NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA <br /> 11/30/2017 6.61 ND 1,556 3.88 199 890 560 107 71 3.0 115 ND ND NA NA NA 0.37 141 NA 39.5 <br /> 11/8/2018 6.92 33 1,789 3.01 141 1,040 650 127 82 4.0 115 ND ND NA NA NA 0.45 171 NA 43.1 <br /> 10/29/2019 7.02 ND 1,521 2.10 164 910 530 101 68 3.0 100 ND ND NA NA NA 0.08 95 NA 35.0 <br /> 11/2/2020 6.99 ND 1,393 2.19 285 920 560 108 71 4.0 106 0.09 NO NA NA NA 0.45 83 NA 42.2 <br /> 10/29/2021 6.93 7.8 1,543 0.51 298 920 570 110 71 3.0 113 ND ND NA NA NA 0.50 96 NA 50.9 <br /> 10/31/2022 7.04 ND 1,604 7.07 234 880 500 95 64 3.0 124 ND 0.01 NA NA NA 0.74 82 NA 91.2 <br /> 10/31/2022 7.04 2 1,604 7.07 234 890 500 96 64 3.0 123 ND 0.01 NA NA NA 0.75 82 NA 91.2 <br /> Well was resampled for Total Coliform on 11/11/2016 due to lab error on the original sample. <br /> NO is"not detected". <br /> NA is"not analyzed". <br /> 11/11/2016 was the duplicate for the resample event <br /> EKI Environment&Water,Inc. <br /> July 2023 Page 176 of 281 EKI B90088.03 <br />