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Version 4/2/2019 Page - 6 Public Works Quote <br />b.Contractor shall setup over the well a line shaft turbine test pump for double disk cleaning of <br />the well. The disks shall be set in 5’ intervals. No other method of agitation (air ram devices, <br />walking beams, pulley systems, etc) is acceptable and will result in disqualification of bid. <br />c.Double disking must be performed with a vertical turbine pump. No other method such as <br />airlift, etc. is acceptable. <br />d.Contractor is to obtain two consecutive bacteria samples 24 hours apart per IDEM <br />requirements and report results within 48 hours to City of South Bend or each. <br />e.To allow for 36 hours contact time between treatments, the contractor must be on site every- <br />other-day for over two weeks: Monday, Wednesday, Friday during the project. No work can <br />be performed on Saturday or Sunday. <br />f.To insure safety of the community surrounding the well field, no cleaning chemicals are to be <br />left on site when the contractor is not present. <br />g.No phosphates are to be used in the cleaning process. No other chemicals not specifically <br />stated herein are to be used during the cleaning process. <br />h.Prior to final acceptance, the contractor shall cleanup the construction area. The site shall be <br />left neat and clean in condition acceptable to the owner <br />XVIII.STEP DRAWDOWN TEST <br />A. Prevailing Specifications: None <br />B. Additions: <br />1.On Day 1 of cleaning the contractor shall provide all field labor and equipment to conduct a step <br />drawdown test, for 30 minutes per step at the following rates: <br />a.Shutoff <br />b.½ the pumps rated capacity <br />c.¾ the pumps rated capacity <br />d.100% of the pumps rated capacity <br />2.The well shall be test pumped using an external mechanical or Mag meter to determine accurate <br />flow recordings. <br />a.Must provide accuracy documentation to include last calibration date and data. <br />3.Payment for all work included in the step drawdown test shall be made as a lump sum as specified <br />in the proposal as follows: <br />Step Drawdown Test……………………Lump Sum (LS) <br />XIX.WELL CLEANING AND RE-DEVELOPMENT <br />A. Prevailing Specifications: None <br />B. Additions: <br />1.Day 1 – Contractor shall pull vertical turbine pump from well and transport the pump bowl, <br />lineshaft assembly, discharge head and motor to their pump shop for teardown and inspection. <br />An inspection report shall be provided to SBU before any refurbishment of the pumping <br />equipment. SBU must authorize any work done to pumping equipment beyond the inspection. <br />SBU must be allowed to inspect all equipment. <br />2.Day 2 – Video inspection of casing and screen <br />a.The complete well including casing and screen shall be video inspected with a color borehole <br />camera. <br />b.The well cannot be video inspected until a minimum of 24 hours after the pump is pulled to <br />allow for debris to settle, allowing a clear view of the well. <br />c.It is the contractor’s responsibility to further clear the well prior to the video if applicable. <br />d.Camera shall have sufficient lighting on board to show in plain view the details within the well <br />screen and casing <br />e.An archive copy of the video shall be provided to the customers on DVD or thumb drive with <br />the pump inspection report as well as a written summary of the inspection. <br />f.Downhole camera must have both down looking and side view/rotational capabilities. <br />g.Camera must have on screen display of depths overlaid directly to the video. <br />h.Submerged tape measures are not acceptable for documenting depth. <br />i.Black and white video, indirect mirror imaging, and low resolution cameras are not <br />acceptable.