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410 3.0 Monitoring Well Construction <br /> Monitoring wells /piezometers will be installed using a modified drive point method where a hole <br /> is drilled with a Giddings Auger Drilling Rig and then a 1 -inch PVC casing will be jetted in the <br /> hole using water or air. The PVC casing will be slotted on the bottom one -foot of casing and a <br /> filter cloth placed around the slotted section. Monitoring wells will be installed as deep as <br /> possible. It may not be possible to get the trailer- mounted Giddings Rig into some locations. In <br /> such cases the monitoring wells will be jetted in using air or water supplied by long hoses from <br /> an air compressor or high - pressure water pump. Hand augering will be the installation <br /> procedure for the monitoring well located on the opposite bank of the river. <br /> 4.0 Aquifer Test Protocol <br /> The aquifer test will consist of a minimum 10 -hour continuous pumping period, followed by a <br /> recovery- monitoring period. The pumping may continue for a maximum of 7 -days if field data <br /> indicates necessity. The recovery monitoring period will be of the same length as the pumping <br /> period. Results of field data analyses will be used to adjust the pumping and recovery period, if <br /> needed. <br /> Pre -Test Monitoring: Pre -test monitoring of groundwater and stream elevations will be <br /> performed to establish whether the aquifer is near steady -state conditions. In addition, the pre- <br /> test monitoring will provide information on daily variability of stream and aquifer conditions. <br /> Monitoring will be started at least three days prior to APT startup. Pre -test monitoring data will <br /> be reviewed and a decision on startup will be made based on the analysis of this data. <br /> Discharge Measurement: All water from the test will be discharged away from the pumping <br /> well to the existing recharge pond served by the well. Discharge will be recorded from a <br /> flowmeter every 5 minutes for the first hour and every 60 minutes for the next 9 hours and every <br /> 8 hours thereafter if pumping continues after 10 hours. <br /> Groundwater Level Measurement: Water level measurements will be taken at each monitor <br /> well and the pumping well using a pressure transducer /data logger. As a backup, manual <br /> measurements may be taken using a water level indicator. Water level measurements during <br /> the recovery period will be recorded with the same frequency as during the drawdown portion of <br /> the test. <br /> Stream Gage Measurement: Three stream elevation gages will be installed at the following <br /> locations: <br /> 1. Adjacent to the pumping well <br /> 2. At the upstream flow monitoring location <br /> 3. At the downstream monitoring location <br /> Stream elevation readings will be recorded using a pressure transducer /data logger. <br /> Rain Gage Measurement: A rain gage will be installed at the site and data collected every <br /> hour for the first 8 hours and a minimum of two times a day thereafter <br /> Page 2 of 3 <br />