To:
From:
Re:
B. Motion:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: February 24, 2022
David L. Boucher, Superintendent
Wastewater Department
Maintenance Contract for Energy Recovery Generators
To approve the Energy Recovery generator 3-year maintenance contract with
Southworth-Milton, Inc. (Milton CAT) of Milford, MA in an amount not to
exceed $277,014. Funding will be through Department: 169 Wastewater; Fund:
Wastewater; Account Classification: 54 Property Services.
The Energy Recovery facility was recently upgraded to include 2 new generators,
purchased form Milton Cat, that run on digester gas generated from the primary
and secondary sludge digesters. The installation of the new generators was
completed in August 2021.
Milton CAT provided an O&M manual for the new generators that includes
different levels of maintenance required based on hours of operation. Milton
CAT has been performing oil changes and other maintenance related work on a
temporary basis until a maintenance contract is established and approved.
Quotes for a 3-year maintenance contract was sent to several vendors. Only
NEESCO and Milton CAT responded back with a maintenance proposal and
quote. It was difficult to compare the proposals duc to the different maintenance
approach offered by each company. Although NEESCO’s quote was lower than
Milton CAT, Milton CAT has specific knowledge on the functions of these
specialty generators and can provide ready access to spare parts as they are the
authorized representative of Caterpillar. This would also minimize long lead
times for repairs should any generator parts fail.
Milton CAT have provided a quote for the 3-year maintenance on two generators
in the amount of $277,014. Their costs include a top end engine overhaul between
years 2 and 3, which was quoted at $42,380 per generator.
