A002 - Clarifications.pdf

·Black Text = Vendor Requests/Questions

·Blue Text = NGA Responses/Clarifications

BAS UPGRADES - RFP-10-258

AMENDMENT 002

ADDENDUM

1. Is there a requirement for new weld-o-lets for the air washer pump pressure sensor? In previous scopes I believe this was required but do not see it in this RFP.

Threadolet installation will be performed by the NGA.

2. Has the gallery standardized on a panel mount touch screen interface? If so, please provide basis of design manufacturer and model number.

The NGA does not have a standard established for the touch screen panel interface. We have used the

Industrial Image S-Series Panel PC and they would be acceptable.

3. It was mentioned at the walkthrough that EAC 4 + 7 would require night work for any type of shutdown. Is it understood that all work that involves any type of shut down is to be done on OT?

The contractor may shut down the units during NGA unoccupied times, 6am-10am and 5pm-midnight, to do any work that can only be performed with the units off. The changeover to the new VFD’s / controls cannot be done in a four hour period (6am-10am) so will necessarily be after 5pm. This does not apply to EAC-6 and 8 as they can be de-energized during the NGA’s open hours.

4. Are the new VFD’s to be installed in the same location as the existing? Spec mentions locations on drawings but I do not see anything on the drawings that shows new drive locations.

The new VFD’s will be installed adjacent to the existing ones.