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Appendix C-Historical Water Quality City of Lathrop <br /> Consolidated Treatment Facility <br /> Monitoring and Reporting Program R5-2016-0028-03 Rev3 <br /> CISP-1 <br /> Total <br /> Data Coliform EC DO ORP Hard- Calcium Magnesium Potassium Sodium Manganese Barium Nickel Bromide Chloride Fluoride Sulfate <br /> Sampled pH Bact1 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) <br /> er <br /> mg/) <br /> mL <br /> 8/25/2005 6.93 NA 1,657 -- 412 1,030 NA %13 39 1.0 110 ND 0.01 C.038 NA ND NA 213 NA 200 <br /> 11/11/2005 6.80 NA 1,609 - 595 1,110 NA 152 38 1.0 134 ND 0.01 0.035 NA ND NA 189 NA 183 <br /> 2/22/2006 7.24 ND 1,485 - -18 1,040 NA 156 36 1.0 151 ND ND 0.039 NA ND NA 187 NA 183 <br /> 5/15/2006 6.79 ND 1,447 - - 1,030 NA 159 37 1.0 139 ND ND 0.037 NA ND NA 192 NA 183 <br /> 9/13/2006 12.18 3.6 1,435 - -191 950 NA 126 31 1.0 148 ND ND 0.033 NA ND NA 191 0.30 177 <br /> 9/5/2013 6.88 >1,600 901 4.83 74 553 300 85 21 0.8 79 ND ND 0.500 NA NA 0.22 74 NA 70 <br /> 9/18/2017 7.01 ND 1,291 3.22 121 860 410 116 30 1.0 107 0.05 ND NA NA NA 0.47 141 NA 121 <br /> 11/29/2017 7.31 240 1,387 2.68 187 890 440 120 33 1.0 100 ND ND NA NA NA 0.47 152 NA 134 <br /> 2/28/2018 7.48 2 1,455 3.76 123 920 470 132 34 1.0 93 0.03 ND NA NA NA 0.54 164 NA 137 <br /> 11/6/2018 6.99 ND 1,049 2.65 293 640 320 90 23 ND 73 ND ND NA NA NA 0.34 115 NA 93 <br /> 4/30/2019 7.13 NO 1,281 4.38 235 800 NA NA NA NA 112 NA NA NA NA NA 0.50 175 NA NA <br /> 10/30/2019 7.03 7.8 1,127 4.22 216 710 340 95 25 1.0 90 ND ND NA NA NA 0.48 107 NA 112 <br /> 5/11/2020 7.18 NO 1,098 3.23 232 810 NA NA NA NA 94 NA NA NA NA NA 0.45 171 NA NA <br /> 11/6/2020 7.08 ND 1,232 6.70 171 810 410 115 31 1.0 103 ND ND NA NA NA 0.55 188 NA 143 <br /> 5/5/2021 7.14 2 1,260 5.91 208 820 NA NA NA NA 97 NA NA NA NA NA 0.56 147 NA NA <br /> 10/18/2021 7.19 49 897 2.75 232 630 290 82 21 7.0 94 ND ND NA NA NA 0.27 88 NA 56 <br /> 5/3/2022 7.05 ND 995 1.25 156 600 NA NA NA NA 65 NA NA NA NA NA 0.22 77 NA NA <br /> 11/9/2022 7.16 ND 917 4.06 256 520 280 78 20 1.0 104 0.25 0.26 NA NA NA 0.24 76 NA 53 <br /> 4/4/2023 7.29 2 750 3.86 337 460 NA NA NA NA 99 NA NA NA NA NA 0.25 68 NA NA <br /> Bold values exceed groundwater limitation. <br /> NS indicates that well was not sampled during regular quarterly monitoring. <br /> NO is"not detected". <br /> NA is not analyzed". <br /> City of Lathrop-CLSP-1 City of Lathrop-CLSP-1 <br /> Total Dissolved Solids NOa as Nitrogen <br /> 5,000 50 <br /> 4,000 40 <br /> i3,000 E 30 <br /> E { <br /> 0 2,000 p 20 <br /> F z <br /> 1,000 db 10 e <br /> 0 0 <br /> Date -,Date <br /> EKI Environment&Water,Inc. <br /> July 2023 Page 1 of 281 EKI B90088.03 <br />