Laserfiche WebLink
' All field notes and documentation regarding these tasks, including pane' placement and <br />seaming forms, weld test results, and liner repair records are provided it~ Appendix C of <br />this report. <br />' Geojabric and Geomembrane batallation <br />Field-approved geofabric sheets (8 ounces/ydZ material) were installed over the berm and <br />' any exposed foundation soil at the bottom of the ponds. The geofabric w~s placed with a <br />minimum of 6 inches of material between sheets. Sufficient tension was applied to each <br />' sheet to remove any obvious folds and wrinkles prior to installation of th(; geomembrane <br />liner. <br />' The geomembrane liner consisted of 60-mil textured high-density polyethylene (HDPE) <br />' placed in 22 inch wide panels. The individual panels were laid over the ~eofabric with a <br />minimum of 6 inches of material overlap and no major folds or wrinkles. ~II panels were <br />' placed such [hat the seams between adjacent panels were perpendicular to the slope <br />contours of [he berm. <br />t Lirrer Seam Welds <br />' Liner seams between adjacent panels were hot wedge welded wherever po stble to form a <br />continuous, watertight barrier. All seams that could not be wedge weld~d (e.g., seams <br />between the new and existing liner) were extrusion welded. Each seam to ~be welded was <br />cleaned and prepared to be free of dust, debris, and moisture that wduld affect the <br />' integrity of the weld. Control settings (i.e., speed and/or temperature s~ttings) on the <br />welding equipment also were adjusted as necessary to account for chan~es in ambient <br />' temperature during welding operations. In addition, trial welds were ~repared from <br />remnants of liner material after every four hours of operation to ensure that the welding <br />' equipment was operating properly. Six specimens extracted from each vial weld were <br />subjected to shear and peel tests (3 shear tests, 3 peel tests) in accordande with ASTM <br />' standards (ASTM D413, D638, and D3083). Each of the three shear test specimens were <br />required to have a minimum shear strength of 120 Ibfinch-width of seam,l while each of <br />' the three peel test specimens were required to have a minimum peel Strength of 70 <br />]b/inch-width of seam. These test criteria were exceeded by all trial weld specimens <br />1 ~ <br />Snrr Luis Project 7 ~ Ceo Trans. /nc. <br />nw i~„~nmsv~~r„i<r.;va~~~~.~.ra,m.~,~~~da~.m~,u n~~n.~a,a d,.r Februar}•100/ <br />