Specifications include, but are not limited to: a)Phase I- Bench Testingi.Each bidder will have the opportunity schedule an appointment to bench test his/her respective product line of polymers using plant sludge samples. Bidders may test their products, for a period of up to one (1) eight (8) hour day, Monday through Friday, 8:00 a.m. to 4:00 p.m. Bidders may bench test as many of their products as they wish within this time period. ii.Bidder should use the results of the bench test to select one (1) polymer for subsequent full-scale testing in the County treatment facilities. Selection of the polymer to be tested shall be at the sole discretion of the bidder.b)Phase II – Treatment Facility Testingi.Bidders may test a maximum of one (1) polymer at each treatment facility. ii.Each bidder shall provide, at its expense, the selected polymer for the Phase II testing. Phase II testing shall be coordinated through the Procurement Officer, Sylvia Dyson, procurement@staffordcountyva.gov. iii.To allow for proper testing, the following quantities of the selected polymer will be required:Lake Mooney: 100 poundsAquia: 55 gallonsLittle Falls Run: 55 gallonsiv.Phase II testing consists of testing the selected polymer at each treatment facilityduring dewatering operations with the facility’s centrifuge. Each test will determine the maximum gallons per minute (gpm) that the centrifuges can process while using the polymer designated and supplied by the bidder. This must be maintained over a minimum 6-hour period. v.The bowl speed will remain constant for each test. Liquid sludge feed rates will remain constant for each test and will be based on the maximum feed rate that has historically produced an acceptable cake dryness (i.e., 17% cake discharge solids) using the polymer currently in use. Polymer feed rates will be adjusted in order to achieve maximum gpm to achieve the best cake percent solids in addition to the best centrate.