It is the purpose of these specifications to describe Fuel Tanks, (hereinafter referred to as "unit") to be purchased for use by the West Virginia Parkways Authority (hereafter referred to as Authority); to define the provisions to be contained in proposals for the sale of said unit to the Authority; establish a schedule for delivery and the criteria for gauging the compliance of the bidder to these specifications. 667.2 FIBERGLASS UNDERGROUND TANK SPECIFICATIONS: 667.2.1 Quality Assurance 667.2.1.1 Governing Standards, as applicable: 667.2.1.1.1 Underwriters Laboratories (UL) Standard for Safety 1316 Glass-Fiber Reinforced Plastic Underground Storage Tanks for Petroleum Products, Alcohols, AlcoholGasoline Mixtures. A UL label shall be attached to each tank 667.2.1.1.2 National Fire Protection Association codes and standards: • NFPA 30 Flammable and Combustible Liquids Code • NFPA 30A Motor Fuel Dispensing Facilities and Repair Garages Code • NFPA 31 Installation of Oil-Burning Equipment Standard 667.2.2 Products: Double-Wall Fiberglass Underground Storage Tanks 667.2.2.1 Loading Conditions – Tanks shall meet the following design criteria: 667.2.2.1.1 Surface Loads: Tank shall withstand surface H-20 and HS-20 axle loads when properly installed. 667.2.2.1.2 External Hydrostatic Pressure: Tank shall be designed for 7’ of overburden over the top of the tank, the hole fully flooded and a safety factor of 5:1 against general buckling. 667.2.2.1.3 Internal Load: Tank shall withstand a 5-psig air-pressure test with a 5:1 safety factor 667.2.2.2 Product-Storage Requirements 667.2.2.2.1 Tanks shall be vented and operated at atmospheric pressure only, except for use with vapor recovery systems at a pressure or vacuum not to exceed 1 psig (7kPa). 667.2.2.2.2 Tank shall be capable of storing liquids with a specific gravity up to 1.1. 667.2.2.2.3 Tank shall be capable of storing products identified in the manufacturer’s standard limited warranty in effect at the time of purchase. 667.2.2.3 Materials 667.2.2.3.1 The tank shall be manufactured with premium resin and glass-fiber reinforcement. 6 667.2.2.4 Monitoring Capabilities 667.2.2.4.1 Tanks shall have a monitoring space between the walls to allow for the free flow and containment of leaked product from the primary tank. The monitoring space shall provide equal communication in all directions. 667.2.2.4.2 The following continuous monitoring conditions shall be compatible with the cavity between the inner and outer tanks: • Vented to atmosphere • Vacuum – 5 psig maximum • Positive air pressure (3 psig maximum)
