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Leachate System Testing <br /> • Testing the leachate system consists of monitoring the pumping rate of each sump pump. Leachate <br /> pumps that are operating at the rate consistent with past performance are considered to be operating <br /> normally. The in-line filters at the pump intakes are replaced every one to two years when a diminished <br /> flow is observed. Flow rate is calculated by the operator while observing the flow meter. Exposed <br /> leachate pipes are inspected for damage or disturbance once a month. <br /> HISTORICAL TIME SERIES PLOTS <br /> Historical Time Series Plots are included with this report on CD. Constituents not detected are plotted at <br /> a value of half their respective detection limits in the Historical Time Series Plots. Note that Outliers <br /> were included in the plots as directed by RWQCB staff. <br /> North County RC&SL Public Works/Solid Waste <br /> 1s'Semester 2013 Groundwater Monitoring 13 County of San Joaquin—July 25,2013 <br />