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Building Trust. Engineering Success.
MEMORANDUM
Invited Bidders
Edward A. Galvin, P.E.
Eric S. Steinhauser, P.E., CPESC, CPSWQ
3066.09
February 11, 2019
Addendum #3
Phase III Construction
Four Hill Landfill
Nashua, New Hampshire
Jeff LaFleur, City of Nashua
Kerry Converse, City of Nashua
This addendum shall be part of the Contract Documents for the above-referenced project.
Please acknowledge receipt of this Addendum in your proposal({s).
CLARIFICATIONS
1. The selected contractor will be required to pay for any installation required by
Eversource to meet the intent of the design. For the purpose of this bid, the contractor
shall provide a suggested installation allowance for this work. This allowance will not
be held against any of the invited bidders during the proposal evaluation phase as the
actual Eversource installation price is unknown at this time.
2. Specification Section 15210 was revised to:
Clarify joint hardware requirements; and
Include a section on pneumatic testing as an alternate to hydrostatic pressure
testing. The revised specification is enclosed.
3. |The pump control panel (CP-1) is to be provided by the selected contractor, not the
City. In regard to panel control logic, notes are provided on Sheet 17 of the Drawings
and are reproduced below:
SANBORN, HBAD & ASSOCIATES, INC.
A float switch shall be in the floor sump. If the float switch is closed due to liquid in
the leachate building, the leachate pumps shall be shut down and visual and remote
alarms shall be activated.
Level sensors shall be installed in the leachate sideslope risers to measure liquid
levels relative to the base of the sump liner. The level sensors shall control the
leachate pump cycles.
