City of Nashua
Public Works Division Wastewater Department
9 Riverside Street 2 Sawmill Road, Nashua, NH 03060
Nashua, NH 03062 Fax (603) 594-3474
MEMORANDUM
DATE: December 21, 2015
TO: Daniel Kooken, Purchasing Manager
FROM: David A. Simmons, Superintendent Cy
RE: Sole Source Justification for Waukesha Maintenance
The Wastewater Treatment Facility operates an anaerobic digestion process that harnesses the
byproduct, methane, and generates electricity to power the operation along with other aspects of
the treatment operation. The minimum recovery from on-site generation of power is
$5,000.00/month, with the opportunity to capture additional capacity when the construction
activities associated with the wet weather treatment facility are completed.
The generator, a Waukesha model VGF-36GLD, operates 24/7, with only periodic downtime for
scheduled maintenance at specified intervals. This unit continues to be supported with OEM
parts, The expected lifespan of this machine is 20 yrs. and with continued maintenance and
regular service, should meet those expectations.
The Wastewater Treatment Facility requests to open a purchase order with Highland Power for
weekly maintenance of the Waukesha generator. Highland Power has been the sole source
provider for all maintenance and repairs since 2008.
Administration Street City Parks-Recreation Solid Waste Wastewater
Business Office Department Engineer Department Department Treatment Plant
(603) 589-3140 (603) 589-4750 (603) 589-3120 (603) 589-3370 (603) 589-3410 (603) 589-3560
