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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 /> KM W-6 continued
<br /> Total
<br /> Date Coliform EC DO ORP Hard- Calcium Magnesium Potassium Sodium Manganese Barium Nickel Zinc Bromide Chloride Fluoride Sulfate
<br /> Sampled pH Bacteria (uS/cm) (mg/L) (mV) TDS(mg/L) ne/L (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)
<br /> (per 100 (mg )
<br /> mL
<br /> 1/23/2012 6.81 ND 1,542 - - 840 388 93 38 10 85 ND 0.32 NA NA ND -- 137 ND 250
<br /> 4/26/2012 6.72 ND 1,514 - 124 870 421 106 38 10 81 ND 0.36 0.0087 NA ND -- 138 ND 290
<br /> 8/1/2012 6.73 ND 1,901 - -31 1,210 647 172 53 9.0 93 ND 0.35 NA NA ND -- 163 ND 490
<br /> 10/29/2012 6.69 ND 1,818 - 79 1,150 597 160 48 9.0 87 ND 0.36 NA NA ND -- 128 ND 430
<br /> 2/4/2013 6.90 ND 1,483 - 177 990 505 133 42 10.0 85 ND 0.34 NA NA ND -- 134 ND 300
<br /> 5/6/2013 6.79 ND 2,032 - 193 1,110 435 100 45 13.0 220 ND 0.37 0.0094 NA ND -- 280 ND 173
<br /> 8/5/2013 7.08 ND 2,013 0.35 240 1,090 NA NA NA NA 266 ND 0.25 NA NA NA 0.48 332 NA NA
<br /> 8/5/2013 7.08 ND 2,013 0.35 240 1,100 NA NA NA NA 263 ND 0.26 NA NA NA 0.48 324 NA NA
<br /> 11/19/2013 6.87 ND 2,058 0.23 184 1,170 390 103 33 9.0 273 ND 0.31 0.0106 NA NA 0.41 320 NA 120
<br /> 2/6/2014 7.01 ND 2,007 0.63 155 1,130 NA NA NA NA 251 0.10 0.30 NA NA NA 0.47 285 NA NA
<br /> 4/28/2014 6.85 ND 1,956 0.21 216 1,110 500 131 43 10.0 204 0.11 0.38 0.0770 NA NA 1.62 261 NA 205
<br /> 8/6/2014 6.70 ND 2,628 2.08 171 1,520 NA NA NA NA 327 0.10 0.30 NA NA NA 1.28 490 NA NA
<br /> 11/4/2014 6.80 ND 2,165 0.37 185 1,160 320 81 29 11.0 278 0.07 0.26 0.0065 NA NA 0.87 315 NA 143
<br /> 2/2/2015 6.88 23 2,293 0.50 240 1,160 NA NA NA NA 273 0.07 0.27 NA NA NA 0.83 340 NA NA
<br /> 4/27/2015 6.59 ND 2,369 0.54 191 1,370 NA NA NA NA 269 ND 0.31 NA NA NA NA 360 NA NA
<br /> 7/27/2015 6.78 ND 2,594 1.67 158 1,490 NA NA NA NA 320 ND 0.17 NA NA NA 0.83 420 NA NA
<br /> 8/31/2015 6.74 NA 2,636 - - NA NA NA NA NA NA NA NA NA NA NA NA NA NA NA
<br /> 10/29/2015 6.93 ND 2,744 0.53 155 1,560 410 106 35 11.0 384 ND 0.24 0.0067 NA NA 0.83 451 NA 230
<br /> 2/4/2016 6.96 ND 2,933 2.92 84 1,630 NA NA NA NA 378 ND 0.38 NA NA NA 1.14 480 NA NA
<br /> 2/4/2016 4/21/201fi 96 ND 2,09133 2.92 16200 NA NA NA NA 406 0.00 0.5307 NAA NAA NAA 1.1123 490 NAA NA
<br /> 0.0 1, 0 10 0 11.0 06 0 N N N 1 520 N6.9 ND 37 3 12 72 46 2 4 382 276
<br /> Revised Groundwater Limitations in Groundwater Limitations Compliance Plan,August 1,2016
<br /> 2.2 2,072 910 15 556 0.3 0.70 250 500
<br /> 8/8/2016 6.67 ND 2,823 0.20 100 1,540 470 121 42 12.0 313 ND 0.57 NA NA NA 1.32 450' NA 200
<br /> 5/8/2017 6.12 ND 3,527 0.67 68 2,540 NA NA NA NA 325 NA NA NA NA NA 1.17 266' NA NA
<br /> 11/28/2017 7.00 ND 2,510 0.75 195 1,730 610 153 55 8.0 260 NO 0.48 NA NA NA 0.22 191 NA 547
<br /> 5/2/2018 6.58 ND 2,506 2.08 103 1,490 NA NA NA NA 187 NA NA NA NA NA 1.02 308 NA NA
<br /> 11/5/2018 6.44 ND 2,705 0.23 253 1,630 680 172 62 13.0 237 NO 0.73 NA NA NA 0.95 275 NA 366
<br /> 5/1/2019 6.92 ND 1,841 0.40 2fi9 1,070 NA NA NA NA 256 NA NA NA NA NA 0.41 244 NA NA
<br /> 10/31/2019 6.84 ND 2,055 0.25 248 1,220 290 72 27 8.0 281 ND 0.25 NA NA NA 0.52 255 NA 243
<br /> 10/31/2019 6.84 ND 2,055 0.25 248 1,210 290 72 27 9.0 303 ND 0.26 NA NA NA 0.50 241 NA 228
<br /> 5/12/2020 7.24 ND 1,130 0.04 121 610 NA NA NA NA 174 NA NA NA NA NA 0.23 185 NA NA
<br /> 11/4/2020 6.98 2 1,298 0.11 153 690 150 38 14 10 194 0.05 0.11 NA NA NA 0.29 217 NA fi7
<br /> 11/4/2020 6. 1 98 NO ,298 0.11 153 710 150 39 14 10 194 0.08 0.13 NA NA NA 0.32 218 NA 68
<br /> 5/3/2021 7.03 350 1,403 0.96 165 850 NA NA NA NA 200 NA NA NA NA NA 0.34 179 NA NA
<br /> 10/19/2021 6.87 11 1,506 0.7 220 830 200 54 17 19 220 ND 0.11 NA NA NA 0.40 213 NA 70
<br /> 1
<br /> 5/2/2022 7.08 ND 1,090 0.32 44 620 NA NA NA NA 152 NA NA NA NA NA 0.28 141 NA NA
<br /> 11/1/2022 6.89 NO ,524 0.34 339 880 220 55 19 14 205 ND 0.12 NA NA NA 0.42 149 NA 187
<br /> 4/3/2023 7.30 ND 889 1.05 207 490 NA NA NA NA 124 NA NA NA NA NA 0.23 118 NA NA
<br /> ND is"not detected'
<br /> NA is"not analyzed".
<br /> "-"data not available.
<br /> Prior to 8/5/2013 samples collected were not filtered.Beginning 8/5/2013 samples were filtered.
<br /> a:Exceeds proposed limitation after de-trending(de-trended results not shown)
<br /> Concentrations in bold exceed the Groundwater Limitation.
<br /> EKI Environment&Water,Inc.
<br /> July 2023 Page 144 of 281 EKI B90088.03
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