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Mr. Fran Forkas <br /> January 13, 1989 <br /> Page 4 <br /> MONITORING PROGRAM <br /> Parameters to be measured and the frequency of measurements <br /> are defined in the Waste Discharge Permit. In collectingthe <br /> groundwater, it is important to take the necessary precautions <br /> to obtain samples that are representative of the <br /> watersassing <br /> ing <br /> the monitoring well at the time of sampling. Current <br /> the <br /> practice for obtaining representative same <br /> les following procedures: <br /> 1 . pump or bail a minimum of four well volumes from the <br /> well. A well volume is computed each time the well is <br /> sampled and is the volume of water in the bore hole, The <br /> the water in the packing outside the well casing. <br /> volume <br /> is computed by subtracting the distance measured to the water <br /> surface from the total depth <br /> Of he well and multiplying this <br /> result by the area of the <br /> 2 . After the 4 omes of aave samplenus�ng portable ure the pH <br /> and specific conductance <br /> instruments and record the data. This data should be ret <br /> aine <br /> for future reference. <br /> 3 . Pump or bail another well volume and repeat step 2 <br /> field measurements . <br /> F 4 . Compare the values <br /> samplessincconductance. <br /> appropriate <br /> I� they are the , <br /> of the to <br /> containers for the remainder <br /> differenceParepeat rstep 3euntilutwo. <br /> If there is a significant <br /> successive field measurements yield similar results . <br /> SUMMARY <br /> Four wells are runderethedfor monitoring <br /> characteristics <br /> plant. The recommended locations and depths are anticipated to yield water samples that are <br /> representative of water moving onto the site and off of the <br /> site including the effectiveness of the soils in the <br /> percolation ponds in filter theastewater. Prior <br /> to recommended <br /> constructing the monitoring <br /> that the City submit the report to the RWQCB for review <br /> particularly as regards to our recommended locations for them. <br />