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<br /> <br />Bentonite blankets aze to be installed as dry as possible. Should rain damage a <br />Bentonite blanket, that Bentonite blanket must be air dried prior to installation. <br />Replacement decisions aze to be made by the project manager. <br />3.3 Field Seaming <br />3.3.1 Seam layout <br />Upon commencement of the installation, [LPI shall provide the project manager with a <br />proposed panel layout drawing; i.e., a drawing of the facility to be lined based upon <br />submitted engineering drawings. The proposed panel layout drawing is tentative and may <br />be modified by ILPI Field Supervisor with Project Manager approval. <br />In general, seams should be oriented parallel to the line of maximum slope; i.e., oriented <br />along, not across, the slope. In corners and odd-shaped geometric locations, the number <br />of seams should be minimized. No horizontal seam should be less than ~ feet (1.~ m) <br />from the toe of the slope or areas of potential stress concentrations unless otherwise <br />authorized. When full roll lengths will not extend past the toe of slope, panel ends may <br />be seamed provided the panel end is cut at an angle greater than 4~° to maeimize seam <br />strengths. <br />A seam numbering system compatible with a panel numbering system shall be agreed <br />upon at the Resolution and/or Pre-Construction Meeting. <br />3.3. i . I Field joints shall be made by overlapping adjacent sheets a minimum of 3 <br />inches for extrusion welding and 4 inches for hot wedge welding (unless <br />approved by the engineer). <br />3.3.1.2 Polyethylene pipe sleeves shall be used for pipe sleeves penetrating <br />through the lined azea. When the pipe composition is polyethylene [he <br />sleeve should be extrusion welded to the pipe if space permits. For <br />dissimilaz materials, the sleeve should be fastened by mechanical means <br />and sealant applied between the pipe and sleeve. <br />3.3.2 Seaming Equipment and Products <br />The approved processes for field seaming aze extrusion welding and fusion (hot wedge) <br />welding. Proposed alternate processes shall be documented and submitted to the Owner <br />or their representative for approval. <br />The extrusion welding apparatus shall be equipped with gauges giving the temperature of <br />the apparatus at the nozzle and extruder barrel. <br />16 <br />