Date constructed March 03, 2005 Diameter casing /well 20” Outer / 10” Inner Overall depth 194’ Depth to top of screens 157’ Pump intake depth 135’ Pump capacity 1400 GPM 200' TDH Motor horsepower/RPM 100HP / 1780 RPM CLEAN AND INSPECT WELL a) Contractor shall sound well to verify depth. b) Mechanically clean the well casing and screens using nylon brushes; care should be taken to avoid excessive force in cleaning and potential damage to well screens. c) Chemically clean the well casing and screens to 157°F’ BLS using chemicals such as Johnson Nu-Well 120 and Nu-Well 310 Bio Dispersant to remove deposit potentials such as calcium carbonates, manganese, carbonates, sulfate, iron, and biofilms in addition to inhibiting corrosion d) Chemically clean the open hole zone from 157’ to 194’ with dispersant polymer such as Nu-Well 220 in aid of removing potential plugging from clays, silts, and fines. e) Airlift/bail debris from the well, including removal of accumulated sand/sediment to the overall well depth (estimated 194 feet). f) Using video equipment made for this purpose, visually inspect and record the condition of the well casing, to include stopping to view each weld joint, and screens after cleaning and sediment removal. g) Chlorinate the well to disinfect the well. h) Prepare a detailed inspection report to document well conditions and configuration (well diameter, depth of inner/outer casing, screen depth and extent, overall depth, pump installation depth, etc.). i) The inspection report shall include recommendations for the repair of any deficiencies discovered. j) Provide to ONWASA a copy of the video inspection, on suitable storage media (CD or USB flash drive) and two hard copies of the inspection report.
