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2018 ANNUAL GROUNDWATER MONITORING REPORT FORMER KEARNEY—KPF FACILITY-STOCKTON,CALIFORNIA <br /> 1 .3 Summary of Groundwater Monitoring <br /> Field Activities <br /> Water levels were measured in all 48 groundwater wells (Figure 2, Well Locations)and samples were collected <br /> from eight wells in October 2018. Field activities for the groundwater monitoring event conducted in May 2018 <br /> were previously reported in the semi-annual report(Dudek 2018a). Data collected during the Q2 and Q4 2018 <br /> groundwater monitoring events, and evaluated as part of this report, are presented in attached tabular and <br /> graphical summaries(Tables 1-11;Appendices A-H), groundwater elevation contour maps (Figures 3-6), and <br /> isocontour pollutant maps (Figures 7-17). <br /> 1 .4 Summary of 2018 Site Operation and Maintenance <br /> Activities <br /> All wells were visually examined during sampling events for any problems that might impede operation of the wells. <br /> Deficiencies,such as missing or rusted locks and illegible well labels,were corrected and/or repaired. <br /> Treatment system operation and maintenance activities included inspection of equipment and pipelines and <br /> maintenance of the blower and transfer pump motors. Parts and equipment were replaced as needed. <br /> Additional details regarding the treatment system are provided in Chapter 2, Discussion of 2018 Treatment <br /> System Activities. <br /> 1 .5 Condition of Former Pond Covers <br /> Visual examinations of the low-permeability soil covers over the former ponds (Figure 2) were conducted in <br /> conjunction with monitoring events and other site visits. No evidence of erosion, subsidence, or desiccation was <br /> found. There was no vegetation on the pond covers that would present a fire hazard. No standing water was <br /> observed on either of the pond covers. <br /> D U D E K 10886-1 <br /> 3 March 2019 <br />