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San L>/is Project • . S'pecthcations <br />The synthetic liner shall not be placed during high winds or in the presence of excessive surface <br />material moisture. Liner material damaged due to wind uplift shall be discarded. <br />E.4.2.2 Liner Seaming <br />All synthetic liner panel seams shall be welded to form a continuous, watertight barrier. The <br />seams to be welded shall be cleaned and prepazed according to manufacturers guidelines to be <br />free from dust, debris, oil, moisture, or other material that would interfere with liner seaming. <br />panel seams shall be hot wedge welded whenever possible. This shall consist of two pazallel <br />.welds along the overlap between liner panels for the holding pond azea, and a single weld along <br />the overlap between panels in the spray evaporation azea. Where wedge welding is not possible, <br />field welds for the remaining seams shall be by a heat extrusion process. Sated bags shall be <br />placed along the single weld seams in the spray evapontioa area. <br />Field welding shall form a continuous bond between the extrudate and liner material, according <br />to the guidelines of the manutacturer. The field welding equipment shall be capable of <br />continuously monitoring and controlling the temperatures and pressures in a..one of contact where <br />the machine is actually fusing the lining material to prevent changes in environmental conditions <br />from affecting the integrity of the weld. Field welding shall be conducted when the air <br />temperature (measured 12 inches above the synthetic liner surface} is between 30°F and 110°F. <br />When the measured air temperature is outside of this range. field welding may be conducted, but <br />only if the Contractor can demonstrate that seaming performance is acceptable (in terms of sheaz <br />and peel testing outlined in these Specification). <br />E.4.2.3 Liner Anchoring <br />The edge of the liner perimeter shall be continuously anchored in a trench as shown in the <br />Drawings. The Iiner shall extend a minimum of one foot vertically and two feet horizontally into <br />the trench as shown in the Drawings. Welded panel seams shall extend a miniritum of six inches <br />beyond the top of the anchor trench. <br />Liner anchor backfill shall be placed in the trench and compacted to anchor the liner as provided <br />in these Specifications. Backfilling of the Liner anchor ucnch shall be d¢ne when the air <br />temperature above the liner is re]atively cool, in order to min;m;~e liner shrinkage due to <br />decreasing temperature after the liner is anchored. <br />E.4.2.4 Liner Repairs <br />Installation shall be done without puncturing, tearing, or otherwise damaging the synthetic liner <br />panels or seams. No vehicles shall be driven or pazked on top of the liner. Puncttues, overlaps <br />(fishmouths), or other traacceptablc conditions of the liner shall be repaired with an overlapping <br />patch bonded to the liner by field welding. Liner patching shall be done with the patch material <br />extending a minimum of six inches beyond the puncture, tear, or joint in the liner. Repair of <br />damage to the deployed liner and testing of patches of liner will be the responsibility of the liner <br />installation contractor. <br />Batrlr Mowrain Resorvices, lnc. Draft Shepherd Miller, lnc. <br />ue~a.y~.d,;.~vaozsnaca„ra+.~:.aa E - 8 Sepmmhcr /999 <br />[Z ,d 555 'ON Xdj ~ 6E-5I NOW 66-1.Z-d3S <br />