Patent ID: 8500941

Claim:
A method of environmentally controlled manufacture and on-site assembly of a plurality of secondary containment panels for use in a secondary containment system, said method comprising: forming a plurality of flexible substrate pieces; spraying a liquid impermeable coating onto an upper surface region of each said piece at a sufficient distance from said piece to produce a stippled, slip-resistant texture across said region of said piece onto which said coating is sprayed, said coating being sprayed onto said substrate piece in an environmentally controlled enclosure; allowing each said substrate piece to cure in said environmentally controlled enclosure, said coating being sprayed onto said upper surface region of said substrate piece in sufficient thickness to render said sprayed region of said substrate piece impermeable to the passage of liquid without requiring subsequent on-site application of additional coating onto said sprayed region; delivering said coated substrate pieces having respective liquid impermeable sprayed regions from the environmentally controlled enclosure to the site of a containment system; extending said coated substrate pieces across the ground and juxtaposing at least one pair of said pieces relative to one another such that a first one of said pieces overlaps a second said piece to form a seam; and applying an adhesive substance to said seam to fasten said first and second pieces together and seal said seam.