New York Codes, Rules and Regulations › Title 6 - DEPARTMENT OF ENVIRONMENTAL CONSERVATION › Chapter IV - QUALITY SERVICES › Subchapter B - SOLID WASTES › Part 363 - State Aid For Planning For Collection, Treatment And Disposal Of Refuse › Subpart 363-6 - Design, Construction And Certification Requirements › Section 363-6.8 - Geomembrane liners

Current through Register Vol. 46, No. 28, July 10, 2024
(a) Materials required. The
					 geomembrane base liner material must be constructed of HDPE polymer that is
					 acceptable to the department.
(b)
					 Construction requirements.
(1) The geomembrane
					 in both the primary and secondary composite liner systems must be installed in
					 direct and uniform contact with the underlying low-permeability soil layer or GCL
					 in a manner that minimizes waves and avoids creases and must be field seamed to
					 control fluid migration from the landfill. Any waves must be less than two inches
					 in height.
(2) Geomembranes must be
					 installed at a minimum slope of two percent, except slopes parallel to the
					 leachate collection pipe must have a minimum slope of one percent.
(3) The surface of the supporting soil upon
					 which the geomembrane will be installed must be free of stones, organic matter,
					 cracks, irregularities, protrusions, loose soil, and any abrupt changes in
					 grade.
(4) The anchoring system must
					 be constructed as shown on the approved engineering drawings to eliminate
					 potential liquid leakage into the secondary leachate collection and removal
					 system by, at a minimum:
(i) diverting surface
					 water run-off away from the anchoring system; and
(ii) seaming the primary and secondary
					 geomembranes together.
(5)
					 Field seams must be constructed in accordance with the following:
(i) field seams must be oriented parallel to
					 the line of maximum slope (i.e., oriented along, not across the slope). In
					 corners and irregularly shaped locations, the number of field seams must be
					 minimized. The number of horizontal seams must be minimized. Horizontal seams
					 must be more than five feet from the toe of slope in either direction.
(ii) field seams must be primarily made by
					 using a dual-track thermal fusion seaming method. Extrusion welding of field
					 seams must be minimized to the extent practical;
(iii) the seam area must be free of moisture,
					 dust, dirt, debris, and foreign material before seaming;
(iv) field seaming is prohibited when either
					 the ambient air temperature measured one meter above the geomembrane or the
					 temperature of the surface of the geomembrane is below 32° F, when the
					 temperature of the surface of the geomembrane exceeds 158° F, when the
					 ambient air temperature measured one meter above the geomembrane is above
					 120° F, during periods of sustained winds in excess of 20 miles per hour, or
					 during periods of precipitation; and
(v) the field crew foreman of the liner
					 installer must have a documented minimum qualification of installing at least 50
					 acres of previous landfill or comparable geosynthetic systems, on a minimum of
					 five different projects. Each welding machine must be operated by a welding
					 technician who has been certified to operate the welder by a certification
					 program acceptable to the department.
(6) All rolls of geomembrane materials stored
					 at the landfill must be enclosed in protective wrapping, such as the original,
					 unopened packaging or covered with an opaque tarpaulin, to ensure protection from
					 direct sunlight, ultraviolet radiation, flames or welding sparks, temperatures in
					 excess of 160° F, mud, debris and other deleterious materials, and any other
					 environmental condition that may damage the physical property values of the
					 material. The storage location must be stable, dry, and well-drained. The surface
					 on which the material is stored must be free of sharp objects. Rolls of smooth
					 geomembrane must not be stored in stacks more than four tiers high and rolls of
					 textured geomembrane must not be stored in stacks more than three tiers high.
					 Extended outdoor storage of geomembrane materials must not exceed manufacturer's
					 recommendations or nine months, whichever is less. For storage periods longer
					 than manufacturer's recommendations or nine months, geomembrane rolls must be
					 stored off the ground under an additional cover or tarpaulin beyond the
					 manufacturer's wrapping or placed in an enclosed structure.