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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-32 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 /> 4/29/2014 6.58 ND 5,185 4.11 214 3,430 1,670 401 162 &0 504 0.17 0.01 NA NA NA 3.01 1,310 NA 620
<br /> 7/31/2014 6.44 ND 5,231 3.19 179 4,230 1,930 460 190 6.0 474 0.19 ND NA NA NA 3.09 1,350 NA 640
<br /> 10/28/2014 6.49 2 5,606 3.84 201 3,580 1,850 441 182 6.0 513 0.17 ND NA NA NA 3.29 1,280 NA 740
<br /> 1/27/2015 6.70 ND 6,044 5.58 190 4,070 1,930 459 190 4.0 531 NO NO NA NA NA 3.80 1,380 NA 660
<br /> Groundwater Limitations in Groundwater Limitations Compliance Plan,September 30,2015
<br /> 2.2 1 1 1 1 4,230 1 1 460 1 191 1 11 682 1 0.3 1 12 1 1 1 1 1,460 1 1 840
<br /> 10/26/2015 fi.58 13 5,446 1.73 190 3,600 1,7fi0 411 173 5.0 4fi9 ND ND NA NA NA 3.78 1,210 NA 620
<br /> 10/2612.1-1 6.58 ND 5,446 1.73 190 3,760 L740 412 173 5.0 472 NO NO NA NA NA 3.88 L240 NA 640
<br /> 4,25,2016 6.66 ND 4,821 1.83 67 3,310 NA NA NA NA 402 NA NA NA NA NA 3.01 1,090 NA NA
<br /> 4/25/2016 6.66 ND 4,821 1.83 67 3,180 NA NA NA NA 399 NA NA NA NA NA 2.98 1,090 IN NA
<br /> Revised Groundwater Limitations in Groundwater Limitations Com liance Plan,August 1,2016
<br /> 2.2 4,495 2,252 9 689 0.3 1 1 1,601 862
<br /> 10/311 016 7.30 2" 5,085 1.62 2 3,590 1,740 420 168 5.0 438 ND ND NA NA NA 3.40 1,180 NA 645
<br /> 5/5/2017 6.31 NO 7,004 1.20 166 5,070 NA NA NA NA 659 NA NA NA NA NA 4.08 1,640 NA NA
<br /> 11/30/2017 6.73 1.8 6,847 1.33 144 5,080 2,300 546 228 6.0 661 0.04 ND NA NA NA 4.22 1,690 NA 819
<br /> 5/3/2018 6.65 ND 6,229 2.24 97 3,530 NA NA NA NA 545 NA NA NA NA NA 4.19 1,480 NA NA
<br /> 5/3/2018 6.65 ND 6,229 2.24 97 4,13 NA NA NA NA 513 NA NA NA NA NA 3.396 1,38 NA NA
<br /> 11/6/2018 6.40 NO 6,396 0.58 175 4,640 2,270 626 171 6.0 629 NO 0.02 NA NA NA ND 1,600 NA 760
<br /> 4/30/2019 fi.fi8 ND 7,097 3.70 182 4,740 NA NA NA NA 691 NA NA NA NA NA 4.03 1,650 NA NA
<br /> 10/30/2019 6.37 ND 5,591 0.40 230 3,860 1,940 468 188 7.0 485 0.13 0.19 NA NA NA 3.48 1,220 NA 680
<br /> 5/11/2020 6.65 ND 5,273 3.44 306 4,760 NA NA NA NA 693 NA NA NA NA NA 2.28 1,420 NA NA
<br /> 11/6/2020 6.39 ND 4,816 0.25 180 4,000 1,790 448 163 5.0 480 0.04 0.01 NA NA NA 3.20 1,150 NA 610
<br /> 5/5/2021 6.53 ND 5,302 1.18 257 4,190 NA NA NA NA 957 NA NA NA NA NA 3.48 1,330 NA NA
<br /> 10/18/2021 6.45 79 4,821 1.47 293 4,280 1,720 421 162 5.0 447 NO 0.02 NA NA NA 3.47 1,200 NA 635
<br /> 5/3/2022 6*41 ND 6,960 2.15 150 5,230 NA NA NA NA 575 NA NA NA NA NA 3.10 1,490 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 6.46 ND 5,789 1.91 3. 4,610 NA NA NA NA 332 NA NA NA NA NA 4.28 1,710 NA NA
<br /> "Well was re sampled for Total Coliform on 11/11/2016 due to lab error on the original sample.
<br /> .Well
<br /> not sampled on 10/31/2022 due to insufficent volume to sample.
<br /> NO is"not detected".
<br /> NA is"not analyzed".
<br /> NS is"not sampled".
<br /> Concentrations in bold exceed the Groundwater Limitation.
<br /> TDS and Chloride concentrations exceed the Groundwater Limitation after de-trending(de-trended results not shown)
<br /> EKI Environment&Water,Inc.
<br /> July 2023 Page 250 of 281 EKI B90088.03
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