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Faa f f 2• Measure static water levels in the pumping well and the observation well prior to installing the pump. I 3. Install a decontaminated pump j.n the monitoring well for testing purposes. The pump will be a 3 1/2 inch diameter �., Grundfos pump and will have a 5 gpm to 15 gpm capacity. Decontamination procedures are as der.cribed for samFling equipment. °d 4. Install a decontaminated, 1/2-inch I.Q. stilling well alongside the pump's discharge line. The stilling well will protect the water level measuring device and create a calm environment for measuring of water levels during the test. 5. Depth to water measurements during the test will be collect- ed on an approximate logarithmic schedule aeginning with the initiation of drawdown when the pump is turned on. The same schedule will be used during recovery beginning when the pump is turned off. E 6. The installation of equipment in the pumping well will cause the water level in the well to rise. Before initiating the -� pumping test, the depth to water in the pumping well must have equilibrated to within 0.1 feet of the initial static water level recorded in Step 2. This will ensure that the system is at or near equilibrium. Measure anc� record the static depth to water in the observation weLl which is within the response distance of the pumping well. I' 7. Turn on the pump and set its discharge at the maximum y , estimated rate which can be continuously sustained. Maintaining a constant discharge rate for the entire pumping of duration is crucial to the success of the aquifer test. During the test the rate of discharge from the pumping well will be measured and recorded every 5 minutes for the first ". half-hour, and at least once every half-hour thereafter. The flow rate will be measurod with a flow meter and/or by observing the time required to fill a. graduated container. 9. Chemical analysis results or HNu readings of water froth a designated pumping well may indicate a level of compound , f presence such that discharge must be collected. Provisions will be made to containerize the effluent. p.� 10. During a pumping test, the temperature, pH, and specific a conductivity of the discharge water will be measured and recorded at the beginning, middle and end of each test. This information will qualitatively indicate the variability of these water quality parameters in the portion of the aquifer affected by the pumping well. 2 - 7