Finance Committee - Agenda - 4/6/2016 - P94
To:
From:
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E. Motion:
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City of Nashua, Public Works Division
Board of Public Works Meeting Date: March 24, 2016
David A. Simmons, Superintendent
Wastewater Department
Polymer Change order #1
To approve the Change Order #1 in the amount of $130,000 to the purchase order
for the purchase of polymer from Polydyne of Riceboro, GA. Funding will be
through Department: 169 - Wastewater; Fund: Wastewater; Account
Classification: 61 Supplies & Materials.
Vendor quote
Polymer is used at the Wastewater Treatment Facility to coagulate the sludge used
in the presses. In FY15, with the introduction of the new Huber Presses, a new
polymer was required. We conducted bench testing and selected a polymer from
Polydyne and we have been using that product since last May.
We had estimated an annual cost of $120,000 for polymer, but due to the extra
time it has taken us to fine tune the process and the sludge characteristics
constantly changing, our annual estimate was off and we will need another
$130,000 for the rest of the year. There are funds available in the chemical
budget for the additional costs.
Even with the additional costs in polymer usage we have seen a savings from
Casella averaging $18,000/month for the last four (4) months, for a total
anticipated savings overall of $162,000. So, even with the increase in polymer
costs, we are anticipating a net savings of $32,000.
