2021/09/29 Council Agenda Packet

2.9 SODA ASH All soda ash must meet American National Standards Institute (ANSI)/American Water Works Association (AWWA) Standard B201-18. The soda ash must be of the dense type, with an apparent density of 0.9 to 1.1 grams per milliliter (g/mL). The source of the soda ash must be from the Wyoming trona deposits, now termed Lake Gosiute. The supplier's agent shall provide samples for the City according to ANSI/AWWA Standard B201-18 Section 5.1. The samples will be held in borosilicate glass jars. The City will provide the sampling containers. The City shall retain one (1) sample from each shipment. Delivery must be in trucks or trailers dedicated solely to hauling soda ash. The supplier must be able deliver bulk shipments of soda ash in quantities of 35 tons. Each shipment must be accompanied by a Certificate of Analysis. Additionally, each shipment must be accompanied by a weight certificate from a certified weigher. Payment will be made only for weight of the material received. The truck or trailer must be equipped for unloading chemicals to storage tanks pneumatically. The pneumatic transfer will be with a minimum lift of 37 feet through a four (4) inch diameter fill line with a male quick connect connection. The supplier must provide the female connection end. The soda ash storage tanks are located at the WFP Operations Building. The tanks are as follows: • Two (2) solution batch tanks with the capacity of 1,000 gallons each. • Four (4) storage bins with the capacity of 850 cubic feet each. Used for dry chemicals. 2.10 LIQUID SODIUM BISULFITE The liquid sodium bisulfite must have a specific gravity of 1.33 baume and concentration between 38% and 42% by weight. The liquid sodium bisulfite is used for effluent de -chlorination within the WPCF's processes. The supplier must be able to deliver bulk shipments of liquid sodium bisulfite in quantities of 850 to 1,200 gallons. Each shipment must be accompanied by a Certificate of Analysis for the amount of liquid sodium bisulfite in the shipment. Additionally, each shipment must be accompanied by a weight certificate from a certified weigher. Payment will only be made for weight of the material received. The truck or trailer is required to be fitted with a pumping system to off-load product to the City's facility's receiving storage tank. Supplier must provide all connections, hoses, and any other necessary equipment to deliver and pump or off-load product. The liquid sodium bisulfite storage tanks are located at WPCF Final Effluent North (FEN). There are two (2) storage tanks with the capacity of 750 gallons each. 2.11 SODIUM HYPOCHLORITE All sodium hypochlorite solution must conform with American National Standards Institute (ANSI)/American Water Works Association (AWWA) Standard B300-18, Section 4. The sodium hypochlorite shall be potable water treatment grade, in aqueous solution, of a concentration not less than twelve percent (12%) nor more than fifteen percent (15%) by weight Sodium Hypochlorite and have excess Sodium Hydroxide no greater than 1.5%. Page 12 of 27