Specifications include, but are not limited to: The WWTP is requesting bids from firms experienced in providing polymer product for dewatering anaerobically digested sludge. Only liquid polymers will be considered for this application. 3.2.1 First, prospective vendors must jar test Persigo WWTP sludge and select their single best product meeting the specifications in Section 3.6. Vendors are required to collect sludge samples from each process at a time and place designated by the Project Manager. Vendors are responsible for conducting all jar testing and for determining their preferred polymer product for each application. Jar testing will be done M-F, 8:00 A.M. to 3:00 P.M. from November 1 through November 30, 2018. The Project Manager will be Jay Vancil, Wastewater Operations Supervisor, 970-256-4166, jayv@gjcity.org. 3.2.2 Second, if jar testing produces favorable results, batch testing will follow in January 2019. Vendors shall submit sufficient product for a minimum of six (6) batches. Product will be supplied at vendor’s expense. 3.7.2 Polymer Characteristics: The viscosity and other physical/chemical characteristics of the polymer to be provided shall be compatible with the existing polymer storage and feed equipment, metering devices, pumps, gravity belt thickeners, belt presses, and other appurtenant equipment associated with the existing sludge thickening and/or dewatering operations at Persigo WWTP. 3.7.2.1 The polymer shall not contain substances that are inhibitory or toxic to bacteria characteristic of the treatment process. 3.7.2.2 Polymer shall be suitable for storage in plastic vessels, and shall not be corrosive to the polymer storage, pumping or hauling equipment, and the thickening/dewatering equipment or related appurtenances. 3.7.2.3 Potential polymer suppliers must visit and inspect the Persigo WWTP facilities to determine that their polymer products are compatible with existing dewatering equipment and will not inhibit performance, operation or damage existing equipment. Vendors shall be required to submit a letter with their response certifying that the polymer is acceptable for use in the existing dewatering installation. No changes will be made to existing facilities to accommodate the use of a particular vendor polymer product. If damage does occur as a result of using a polymer product not compatible with existing facility equipment, the polymer supplier shall be responsible for all necessary repairs and/or equipment replacement costs to return the equipment to its operating condition. 3.7.2.4 Polymer performance shall not be significantly altered due to weather or temperature conditions. Polymer shall not be allowed to freeze prior to delivery.