Specifications include, but are not limited to: The City of Idaho Falls Sewer Division requests bids to supply a dry polymer make up system, activated polymer dosing pump, and associated services as indicated in these Contract Documents. See included technical specification for the Polymer System for equipment and services to be provided. The Contract, if awarded, will be on the basis of materials, equipment, and services specified or described in the Bidding Documents, including the Addenda. Bidders may propose "or equal" materials and equipment, which if approved by Engineer will be identified by Addendum. The materials and equipment described in the Bidding Documents establish a standard of required type, function, and quality to be met by any proposed “or-equal” item. No item of material or equipment will be considered by Engineer as an “or-equal” unless written request for approval has been submitted by Bidder and has been received by Engineer at least 10 days prior to the date for receipt of Bids. Each such request shall conform to the requirements of the technical specifications. The burden of proof of the merit of the proposed item is upon Bidder. Engineer’s decision of approval or disapproval of a proposed item will be final. Bidders shall not rely upon approvals unless set forth in an Addendum.