February 6, 2019 Page 7
20190206 Addendum Questions File No. 3066.09
41.
42.
43.
44.
Yes, as long as the Badger flow meter is a functional equivalent to the specified
Tigermag flow meter.
On page 17 of 24 on the 11 x 17 plans, tilted SUMP RISER BUILDING ELEVATIONS
AND SECTIONS, there is a_ written’ section sub-titled Building
Components. Under the Building Components section there is another section
sub-titled Primary/Secondary Pump. An EPG 1 H.P. 220V pump is
specified. Can an equivalent QED pump be approved as equal?
Yes, as long as the QED pump is a functional equivalent to the specified EPG pump.
On drawing 17 of 24, detail 5, Sump Riser Building Piping Isometric drawing,
the secondary riser, primary riser and clean out riser do not have flange
adapters fused to them. On drawing 18 of 24, detail 1 & 3 again show no flange
adapter fused to the end of the pipe or no note describing an 18" flange adapter
or back up ring. The drawings currently state that the flange is made of a 1"
thick piece of HDPE flat stock and cut to the diameter of the 18" HDPE pipe. It
would be more cost effective for the manufacturer of these flanges & The City of
Nashua if these flanges were an off the shelf flange that was traditionally bolted
to a flange adapter & back up ring fused to the leachate and cleanout risers.
Also, a flange adapter fused to the end of each of the three risers would assure a
long term positive connection to the risers. I could see a scenario that after
multiple times of taking the currently drawn flanges off and on, that the holes
could strip and there not be a solid connection to the leachate risers.
Contractors may price the bid item assuming that the detail allows for an off the shelf
flange, bolted to a flange adapter & back up ring fused to the leachate and cleanout
risers. Please note this option in the bid.
I was just wondering how you would like to handle the Nashua Electric control
panel for the primary, secondary, and clean out riser pumps. I don’t have any
kind of ladder logic line drawings to get an estimate on the control panel. Do
you think you will have some kind of print or logic document soon? QED needs
this logic to complete the quote for this project.
A proposed logic document for the proposed control panel will be included in
Addendum #3 that will be posted during the week of February 11, 2019.
Reference: 15210, 2.4; 15210 3.2 C2; Sheet 10, Cleanout Parts List,
Comment: The drawing indicates that epoxy coated 304 fasteners, DI rings and
neoprene gaskets are required. Under Section 15210 High Density Polyethylene
Pipe, Fittings, and Appurtenances Part 2.4, 1/8” thick Viton Gaskets are called
out. In the specs under flange joining carbon steel backing rings and galvanized
nuts and bolts are called out. Stainless steel typically needs no additional
coating. In addition, under Section 15210 Part C-2 and C-4a it is referenced that
SANBORN i HEAD
