Sulfur - Based Chemicals for CWD

2026-11-03

Item 1 . Specifications Aluminum Sulfate 48 % Iron Free Liquid Composition Meets current AWWA Standard B403 and : Liquid aluminum sulfate clarity . Liquid alum shall be of such clarity as to permit the reading of flow - measuring devices without difficulty and free from suspended material . Liquid alum shall contain water - soluble aluminum of not less than 4 . 23 percent as Al or 8 . 0 percent as Al203 , except by agreement between the supplier and purchaser . Basic and acidic alum . The range of basicity or acidity of alum is subject to agreement between the supplier and purchaser . In liquid alum , the water - insoluble matter shall not exceed 0 . 7 percent . Specific impurity limits . The total water - soluble iron ( expressed as Fe203 ) content of aluminum sulfate shall be no more than 25 ppm . Where the ANSI / AWWA Standard has conflicting requirements with that of CWD , the CWD purchase specifications and delivery acceptance procedures shall take precedence over the ANSI / AWWA standard . Aluminum Sulfate Delivery Requirements The Cities estimated annual usage is 250 , 000 gallons . The City expects to order deliveries of 5 , 000 gallons for each delivery . The usage noted on this bid document is based on an estimate volume : the City may increase or decrease the actual usage as required . The delivery volumes are standard but CWD reserves the right to increase or decrease delivery volumes based on plant operations . Delivery made to CWD via dedicated tank truck that is only used to transport Aluminum Sulfate , and transferred to bulk storage tanks as directed by CWD delivery inspector . Storage Tank Volume : 3 x 11 , 000 gallons . Average Daily Use : 600 +/- 100 gallons . Delivery Documentation Certificate of Analysis : At a minimum to include : Lot Number , Appearance , Al203 percent ( 8 . 1 – 8 . 4 ) and acceptable range , Specific Gravity @ 60o F and acceptable range of 1 . 318 – 1 . 335 Total Iron as Fe to be less than 25 mg / L ( ppm ). Pounds per gallon . Item 2 . Specifications Ammonium Sulfate 40 %- Liquid Composition Ammonium Sulfate 40 % - Technical . The liquid shall be of such clarity as to permit the reading of flow - measuring devices without difficulty and free from suspended material . Iron , mg / L less than 100 mg / L Specific Gravity : 1 . 23 pH 2 - 7 Water Insoluble < 0 . 01 % pH of solution : 6 . 3 range 2 . 5 – 7 . 0 Delivery Requirements The Cities estimated annual usage is 30 , 000 gallons . The City expects to order deliveries of 2 , 000 gallons for each delivery . The usage noted on this bid document is based on an estimate volume : the City may increase or decrease the actual usage as required . The delivery volumes are standard but CWD reserves the right to increase or decrease delivery volumes based on plant operations . Tank Volume : 2 , 500 gallons Average Daily Use : 60 +/- 10 gallons . Delivery Documentation Certificate of Analysis at a minimum to include : Date and Time of Manufacture , Appearance , Assay - Ammonium sulfate in percent , Water insoluble Matter less than 0 . 01 %, Specific Gravity @ 60o F : 1 . 23 and acceptable range , pH of solution . Pounds per gallon . Item 3 . Specifications Sodium Bisulfite Meets current AWWA Standard B703 and : Composition Liquid Sodium Bisulfite 38 %- Technical . The liquid shall be of such clarity as to permit the reading of flow - measuring devices without difficulty and free from suspended material . A straw color Liquid Sodium Bisulfite Assay shall be 38 % ranging in concentration from 30 . 0 – 45 . 0 % except by agreement between the supplier and purchaser . Specific Gravity @ 77oF of 1 . 35 and can range from 1 . 30 – 1 . 40 . Delivery Requirements The Cities estimated annual usage is 4000 gallons . The City expects to order deliveries of 450 gallons for each delivery . The usage noted on this bid document is based on an estimate volume : the City may increase or decrease the actual usage as required . The delivery volumes are standard but CWD reserves the right to increase or decrease delivery volumes based on plant operations . Tank Volume : 460 gallons Average Daily Use : 10 +/- 5 gallons . Delivery Documentation Certificate of Analysis : At a minimum to include : Lot or Batch Number , Railcar Number . Assay , Color , Specific Gravity @ 77oF and acceptable pH range .

Massachusetts

2026-05-02