Okla. Admin. Code § 252:515-11-57

Current through Vol. 41, No. 19, June 17, 2024

Section 252:515-11-57 - FML installation

(a)Handling. The FML must be handled to avoid bridging or stressed conditions in the material.

(b)Slack allowance. Slack allowance shall be provided to allow for shrinkage during installation.

(c)Placement. The FML shall be installed in direct and uniform contact with the reconstructed clay liner.

(d)Temperature. The FML shall be seamed only when the ambient air temperature is between 40^o F and 104^o F, unless pre-construction weld tests for the seaming demonstrate adequate results at other temperatures.

(e)Wind and rain. The FML shall not be installed when there is excessive moisture or wind.

(f)Overlap. Panels shall have a minimum four-inch finished seam overlap, unless the manufacturer specifies a larger overlap.

(g)Orientation of seams. Seams shall be oriented down the slope, not across it.

(h)Field seam restrictions. In corners and odd-shaped geometric locations, the number of field seams shall be minimized.

(1) No base T-seam shall be closer than five feet to the toe of the slope.

(2) Seams shall be aligned with the least possible number of wrinkles and fishmouths.

(3) If a fishmouth is found, it shall be relieved and cap-stripped.

(4) Field seaming must be performed by a hot shoe fusion welder, an extrusion welder, or an alternative method approved by the DEQ prior to use in the field.

(i)Ancillary penetrations. Pipes, gas vents, manholes, sumps or other objects that may penetrate the liner must be connected to the liner material in a way that prevents leakage and unnecessary stresses.

Okla. Admin. Code § 252:515-11-57

Added at 20 Ok Reg 1151, eff 6-1-03