Bid No. B16-02
Bldgs 1400 & 1500 HVAC & Lighting Renovations
Addendum No. 2
This Addendum No. 2 sets forth modifications to portions of the bid and
contract documents for the above-referenced work described as:
B16-02 Bldgs 1400 & 1500 HVAC & Lighting Renovations
1) Revision: Plan Drawings
 Please refer to all clouded revisions for new details.
2) Revision: Specifications
 DSA – Supplementary Conditions to Specifications
 Section 95100 – Acoustical Ceilings
 Section 15050 – Basic Mechanical Requirements
 Section 15800 – HVAC
 Section 16010 – Electrical General Provisions
 Please refer to all clouded revisions for new details.
RFI Questions & Answers:
3) Please confirm that the mechanical room duct is adequately lined to meet
Title 24. If so, then the only duct requiring R8 insulation is the new duct.
(Drawing Sheet No. M4.1 & M4.2; Specifications Section 15800, Paragraph
2.5.D)
Refer to Addendum #2 Specification Revisions, Section 15800.2.5 Duct
Insulation. All existing return air and supply air ducts in mechanical rooms
that do not meet R8.0 must be brought up to this level. Please assume that all
existing acoustic lined ducts to remain have 1" liner and therefore must be
wrapped with R4.0 wrap.
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B16-02 Bldgs 1400 & 1500 HVAC & Lighting Renovations, Addendum No. 2
4) If the existing duct is wrapped in R4.2 then would you like an alternate
add for insulating existing ducts in the attic that are currently insulated
with R4.2 by adding an additional layer of R4.2? (Drawing Sheet No. M4.1
& M4.2; Specifications Section 15800, Paragraph 2.5.D)
Please see response to item #3 above.
5) Would you like an alternate add for stripping the existing attic duct
insulation and adding new R8 insulation? (Drawing Sheet No. M4.1 &
M4.2; Specifications Section 15800, Paragraph 2.5.D)
No, this is not required.
6) Should we consider the compressor in B-1500 to have the same level of
lead in the paint as the reported compressor in B-1400? (Drawing Sheet
No. M4.1 & M4.2; Specifications Section 15800, Paragraph 2.5.D)
According to the US EPA guidelines, a homogeneous sampling material is a
material that looks uniform throughout a physical space or what EPA calls a
"Functional Space". In this case, the Functional Spaces are buildings 1400
and 1500. If a building material is of the same age, is uniform in color,
texture, size, and date of application, it is considered one homogeneous
material.
It would therefore follow that given the dates of original construction, the
analogues elements of B1400/1500 fall within the guidelines of a homogenous
sampling material and the compressors at B1400/1500 should be considered
to have same test results for lead.
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B16-02 Bldgs 1400 & 1500 HVAC & Lighting Renovations, Addendum No. 2