Pay Item
Pay Unit
Measure to the Nearest
Pay to the Nearest
Geotextile
SY [m2]
0.1 ft [0.5 m]
SY [m2]
Biaxial Geogrid Biaxial Geogrid (STIFF)
SY [m2] SY [m2]
0.1 ft [0.5 m] 0.1 ft [0.5 m]
SY [m2] SY [m2]
217.5.2 Referenced Sections for Direct Payment 1 When specified, the engineer will measure and pay for cover material in accordance
with Section 203, Excavation and Embankment.
202
Impermeable Plastic Membrane
218.1DESCRIPTION
1 This section describes the requirements for furnishing and placing impermeable plastic
membrane.
218.2MATERIALS
1 Provide materials in accordance with the following:
Materials
Subsection
Impermeable Plastic Membrane
0805
218.3EQUIPMENT—Vacant
218.4CONSTRUCTION
218.4.1 General 1 During shipment and storage, protect membrane rolls from direct sunlight, ultraviolet
rays, moisture, temperatures greater than 140 °F [60 °C], mud, dirt, dust, and debris. When storing outdoors, elevate the rolls, and protect them with a waterproof cover. Remove unprotected membrane from the project.
Submit test results and certification by the manufacturer showing the membrane performance relative to requirements. Submit a test sample 6 ft [2 m] long by the full width of the roll at least 14 calendar days before the use of any membrane. Obtain this sample from a roll of membrane that is on the project site. Make sure the sample is labeled with the product name, machine direction, lot and batch number, date of sampling, project number, and certification of compliance. 3 Do not place membrane during wet weather or when the subgrade is wet.
218.4.2 Installation 218.4.2.1 General 1 Overlap longitudinal and lateral joints at least 6 in [150 mm] and glue using a product
type, application rate, and curing procedure recommended by the membrane manufacturer. If joints are not glued, overlap the membrane at least 24 in [600 mm]. Shingle the overlaps so that the exposed edges face the same direction as the flow of drainage. Reinforce and seal blemishes, holes, or scars with waterproof plastic adhesive tape. Replace damaged portions of membrane and unsealed joints, at no additional cost
203
Impermeable Plastic Membrane