To:
From:
Kea:
A. Motion:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: October 22, 2020
David L. Boucher, Superintendent
Wastewater Department
Cotnbined Sewe: Oveifluw low Momtoring Progiain
To approve Amendment 3 in the amount of $158,400 to extend the contract for three
years with Flow Assessment of Auburn, NH for the Combined Sewer Overflow
Monitoring Program. Funding will be through Department: 169 - Wastewater; Fund:
Wastewater; Account Classification: 53 Professional Services.
Flow Assessment Cost Proposal
The Combined Sewer Overflow (CSO) Monitoring Program monitors flow at all of
the CSO discharge structures and three rain gauges throughout the City. The data
collected provides information for reporting to the USEPA and the NH Dept. of
Environmental Services as required by the National Pollutant Discharge Elimination
System (NPDES) permit for the Wastewater Treatment Facility.
Flow Assessment has been providing CSO flow monitoring services since 2018 and
for many years prior to 2015. They have provided excellent reporting and have a
user friendly web site. Their equipment is already in place and will remain so until
the new contract starts. There rates have not gone up since 2018, and there are some
savings if the City choses a 3-year contract instead of the normal 1-year contract. It
is beneficial to the City to continue with this service provider, so it is recommended
that they be awarded a new three-year contract. The total cost for monitoring all the
CSO sites for 3-years ts $158,400, which results in a savings of $9,900 by not going
with a l-year contract renewed every year.
