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Well and Pump Maintenance <br />2. <br />3. <br />The following well and pump maintenance program is recommended: <br />I. Remove and inspect the pump components, including the motor. Replace or rebuild components as <br />necessary. <br />Inspect the well by downhole camera. <br />Based on the initial inspection, the following well maintenance measures may be appropriate: <br />a. Repair suspected mechanical problems near the top of the w'ell and / or add a vent to the <br />outer casing. <br />b. Clean the casing by wire brushing. A stiff brush made of steel cable ends and heavy <br />weights is worked up and down in intervals by a drill rig to clean well casings. <br />c. Clean the screen and gravel pack by methods s"''!i as iugh velocity water jetting, air lifting, <br />and chemical treatment. <br />The well should be re-televised after casing and screen cleaning. <br />Re-installation of the pump and motor. <br />Pump to waste until the water clears. <br />Water quality testing as appropriate. <br />4. <br />5. <br />6. <br />7. <br />Buslgst <br />The construction cost of well and pump maintenance is expected to be in the range of $25,000 to $50,000. <br />Costs can be better defined after the pump has been removed and the pump components and well are <br />inspected. For budget purposes, we have assumed that the casing and screen are in ge -ally sound <br />condition. Due to the anticipated project costs, procurement should follow standard City bidding <br />procedures. Engineering and inspection costs of $7,000 are estimated. At this time, an overall budget of <br />$55,000 is recommended. For reference, the total project cost of the Well No. 2 rehabilitation was $36,000. <br />Schedule <br />This project could proceed as follows: <br />August 1999: Prepare plans and specifications <br />September 21,1999: <br />October 1,1999: <br />November 15,1999: <br />Open construction bids <br />Begin construction <br />Project completion <br />Please feel free to call me at (651) 604-4797 with any questions you may have on this submittal. <br />Sincerely, <br />BONESTROO, ROSENE, ANDERLDC & ASSOCIATES, INC. <br />John Hemming \J <br />cc: Greg Gappa - City of Orono <br />Barry Rathbun - City of Orono