Specifications include, but are not limited to: A purchase order for three (3) pond liners for the fish ponds at the TWRA Normandy Hatchery. Job is estimated to be approximately 52,000 square feet per pond. This estimate is given for job sizing purposes only. Contractor to furnish and install a 45 mil thick, scrim-reinforced polypropylene liner. The geomembrane shall be manufactured by the calendaring process, consisting of first quality ingredients, suitably compounded, of which polypropylene is the principle resin. The finished compound should be uniform in color, thickness, size, and surface texture with maximum UV protection. Installation shall be in all respects performed according to manufacturer specifications. The color of the liner must be black. Roll goods are preferred by owner but panels may be installed if necessary.