Specifications include, but are not limited to: 4.1 Anhydrous ammonia shall be liquefied gas, not less than 99.99% NH3, metallurgical grade. 4.1.1 The material shall contain no solid in suspension that would interfere with the proper operation of owner’s ammonia valves and feed system. 4.1.2 Anhydrous ammonia delivered under this contract shall conform to AWWA (American Water Works Association) Standard B305-06 or the most current version of the Ammonia Standard covered in the AWWA Standards Manual. 4.1.3 The material shall also conform to National Sanitation Foundation Standard 60: Drinking Water Chemicals and shall be certified by NSF as meeting this Standard. 4.1.4 NSF 60 certification shall be supplied with each delivery of product. 4.2 The bidder shall warranty that all deliveries made under this contract are of the quality specified. 4.2.1 The material furnished shall contain no soluble mineral or organic substances in quantities capable of providing deleterious or injurious effects on those consuming the water, or that would otherwise render unfit, the public water supply.