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visually inspect the lift stations that were lined. The Contractor <br /> shall redo any work that has become defective. <br /> 10.16 LIFT STATION LINERS-MATERIAL-HDPE <br /> A. The Lift Station Liner shall be HDPE (high density polyethylene) <br /> with a minimum thickness of 2 mm. All HDPE liner sheets shall be <br /> extruded with a large number of anchoring studs, a minimum of <br /> 39/ft2, manufactured during the extrusion process in one piece <br /> with the sheet so there is no welding and no mechanical finishing <br /> work to attach the studs to the sheet. The liner shall have a pull <br /> out of 112.5 lbs./anchoring stud. <br /> B. Flat liner sheet, non anchored, used for overlapping joints, shall <br /> have a minimum thickness of 3mm. All joints shall be sealed by <br /> means of thermal welding performed certified welders. <br /> C. The lining shall have good impact resistance, shall be flexible, and <br /> shall have an elongation sufficient to bridge up to a 1/4-inch <br /> settling crack, without damage to the lining. The liner shall be able <br /> to bridge any expansion cracks that may occur. <br /> D. Lining shall be repairable at any time during the life of the <br /> structure. <br /> E. A certified fabricator shall custom fit the liner to the form work in <br /> order to protect the concrete surfaces from sewer gases. The <br /> interior surfaces to be protected shall include the walls, ceiling, <br /> and pipe entries. <br /> F. For all lined manholes the use of HDPE Grade rings shall be used <br /> in lieu of brick or precast grade rings. Grade rings shall meet HS- <br /> 25 load rating. Butyl sealant shall be used between each ring to <br /> make a watertight joint. The first grade ring shall be <br /> welded to the liner to provide a gas tight seal. <br /> C. Upon request, the manufacturer shall provide written certification <br /> that the liner used meets or exceeds the requirement of this <br /> specification. <br /> D. Provide a five (5) year unlimited warranty on all workmanship and <br /> products. The work includes the surface preparation and <br /> application of the liner system, shall protect the structure for at <br /> least five (5) years from all leaks, and from failure due to corrosion <br /> from exposure to corrosive gases such as hydrogen sulfide. <br /> 10.17 LIFT STATION LINERS-MATERIAL-FIBER GLASS <br /> A. The lift station liner shall meet all requirements of ASTM <br /> Specifications D-3753 for glass fiber reinforced polyester <br /> 10 - 11 �3 .K•I� <br />