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Section No 6 • <br /> Revision No 1 <br /> Date January 13, 1992 <br /> Page 44 of 55 <br /> will be periodically collected and visually inspected for turbidity <br /> Recovery rates will occasionally be monitored to measure increases (or <br /> decrease) in well efficiency Specific conductivity, pH, and temperature will <br /> be routinely measured and all well development data will be recorded <br /> 6 8 1 Surge $lock Method <br /> The surge block method is generally used to develop wells with smooth <br /> interior screens Two basic varieties of surge blocks may be utilized the <br /> solid surge block and the vented surge block The solid and vented blocks <br /> generally consist of a body block approximately one-inch smaller in diameter <br /> than the casing diameter, and are fitted with two to three "leathers" which <br /> are roughly the same diameter of the casing The vented block has four to i <br /> six venttioles through the"body block in-addition to a valve which allows -- <br /> water to pass through the block on the downstroke <br /> The surge block will be attached to the bottom of a drill stem or pipe <br /> of sufficient weight to ensure a smooth and brisk downstroke under gravity <br /> fall Development with a surge block will be started at a slow rate and <br /> gradually increased as development proceeds The tool will be moved through <br /> a stroke no greater than three feet in length The well will be periodically <br /> bailed to remove sediment buildup Surging will be conducted until the well <br /> discharge is relatively clear and free of sediment <br /> 6 8 2 Pumping Methods <br /> Well development may also be completed by utilizing continuous <br /> overpumping and interrupted overpumping methods When developing using the • <br /> 6-44 <br />