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CORNELL UNIVERSITY CLARA DICKSON HALL
FACILITIES CONTRACTS WASTE & STORM LINE REPLACEMENT
121 HUMPHREYS SERVICE BUILDING
ITHACA, NEW YORK 14853-3701
ADDENDUM NO.1
March 4, 2015
This Addendum contains changes to the requirements of the Contract Documents and Specifications.
Such changes are to be incorporated into the Construction Documents and shall apply to the work with
the same meaning and force as if they had been included in the original document. Wherever this
Addendum modifies a portion of a paragraph of the specifications or a portion of any Drawing, the
remainder of the Paragraph or Drawing shall remain in force.
NOTE: Provisions of all Contract Documents apply.
In the Specifications:
Item 1. In Specification Section 01 14 00 – Work Restrictions, Part 1.11 Working Hours, Subpart
B:
ADD Subparagraph 2. as follows:
2. The Contractor shall assume that the Contractor will be able to work any time in
the period from 6:00 a.m. to dusk, Monday through Saturday in the half of Clara
Dickson Hall which is under construction for this Project. It is noted that the
opposite side of the building will remain occupied by office staff and for summer
activities and camps. On the Ground Floor, the Contractor shall erect a suitable
temporary corridor partition with a hinged door and dust migration seal around
the pipes above to isolate the work area from the elevator lobby and south side of
the building. On the upper floors, the Contractor shall place saw-horse barricades
north of building center with signage, indicating “No Admittance. Hard Hat Area
- Work Area”.
Item 2. In Specification Section 01 50 00 – Temporary Facilities and Controls, Part 1.5
Temporary Enclosures:
ADD Subpart C as follows:
C. Provide temporary dust and dirt control measures as follows:
1. Using a quality sealing tape which will remain in place during
construction, but which will not pull paint or leave residue when
removed, tape doors, edges and bottoms for all doors to student rooms
and non-work area rooms adjacent to the work area and along the
corridor where the work is occurring.
2. Prior to commencing floor saw cutting, grinding, floor removal,
excavation, or backfill, enclose the work area in polyethylene sheeting,
minimum 4 mil thickness. Fasten securely.
3. Provide a ducted air supply at one end of the work area and a filtered
negative air machine at the opposite end of the work area, both ducted to
outdoors. (A HEPA negative air machine is not required.)
4. For the Contractor’s reference, photographs of a pilot project previously
performed at Clara Dickson Hall are attached for reference. These were
also handed out at the Pre-Bid Walk-Through. This dust and splash
protection on the side walls proved adequate and was effective in
keeping concrete splatter and dust from the adjacent areas. However, the
hanging closure at the far end was not effective and allowed dust to
migrate to non-work areas, causing Contractor expense in having to
clean all the rooms. The Contractor for this project shall provide suitable
temporary framing to support closures and hinged self-closing doors, and
other measures as required to prevent dust migration to non-work areas.
5. Note that the attached photos are provided for general information only.
This excavation occurred at the far northeast end of one sanitary line
where the line is shallowest. The line generally pitches downward in the
direction of the sewer.
Item 3. In Specification Section 09 30 00 – Tile, Part 1:
ADD Subpart 1.10 as follows:
1.10 EXISTING CONDITIONS SPECIFICATION
A. Appended to this Specification is a copy of CU SAS Summer 2012
Specification 09 30 00 which covers the construction of Men’s First
Floor Bathroom 1679. The Contractor shall assume that all installations
were made in accordance with this Specification.
B. The showers are constructed with a proprietary shower and
waterproofing system per Part 2.09 and Part 3 of this Specification. All
work in the current 2015 Project which affects these shower units shall
be installed in accordance with the requirements of the attached 2012
Specification.
Item 4. In Specification Section 09 65 19 – Resilient VCT, Part 2.2 Resilient Tile Flooring
Materials, Subpart A.:
REPLACE the words “EXCELON Feature Tile & Strips” WITH the words
“EXCELON Standard Imperial Texture, 12˝ x 12˝ x c˝. Color(s) to be selected by
Owner.”
Item 5. In Specification Section 09 68 00 – Carpeting:
ADD Part 2.6 as follows:
2.6 BASIS OF DESIGN
A. Basis of Design carpet tile shall be Interface Modular Commercial
Carpet Tile, Cubic – 4855 Optic.
Item 6. In Specification Section 09 68 00 – Carpeting:
DELETE Part 3.1 – Pre-Installation Requirements.
Item 7. In Specification Section 31 23 16.13 - Trenching, Part 1.2 Work Included, Subpart B:
DELETE Item 8. “Owner Provided Dump Site” and INSERT new Item 8 as follows:
8. Disposal of Materials.
Item 8. In Specification Section 31 23 16.13 - Trenching, Part 3.6 Disposal of Materials:
ADD Subpart B follows:
B. As the Basis of Bid, the Contractor shall include two separate dumpsters for
excavated materials from inside the building.
1. Concrete chunks from the removed floor shall be placed in one dumpster.
The Contractor shall endeavor to recycle the waste concrete material at a
concrete recycling facility.
2. The other dumpster shall be lined with 10 mil polyethylene sheeting and
shall receive the soil, pipe sections and cinder fill from the excavation
inside the building.
3. During previous excavations in the building, the concrete floor was
approximately 5 inches thick. Beneath the floor was a bedding material,
black in color, approximately 6 to 8 inches thick, which is believed by
the Engineer to have been a cinder fill material. Beneath that was
material appearing to be native soil. The Contractor shall assume that this
material can be disposed of in a non-hazardous landfill. However, the
material may be tested by the Owner, prior to removal from site to
confirm that the material does not contain sufficient levels of
contaminants, which would require the disposal in a special landfill. Any
costs for testing of the material or extended hauling costs to a disposal in
a special landfill shall be borne by the Owner. Do not include in the
Contractor’s bid.
Item 9. In Specification Section 31 23 23.13 - Backfill, Part 2.2 Offsite Materials:
ADD Subpart G as follows:
G. Pea Gravel / #1A Stone:
1. #1A pea gravel or #1A crushed stone consisting of clean, durable,
crushed or round stone conforming to ASTM-C33 for d inch aggregate.
Clean, dried and free of organic/deleterious materials. Material shall be
NYS DOT #1A per Table 5.
TABLE 5
GRADATION REQUIREMENTS: GRAVEL/CRUSHED STONE
SIEVE SIZE PERCENT PASSING BY WEIGHT
½˝ 100
¼˝ 90 - 100
d˝ 0 - 15
On the Contract Drawings:
Item 10. On Drawing P001 – Title Sheet, Symbols, Schedules, Notes & Details, Detail 1/P001:
INSERT a dimension on each side of sanitary or storm line to side of trench indicated as
one pipe diameter minimum.
ADD the words “or Pea Gravel or NYS DOT #1A Crushed Stone” after the word “Stone
Dust”.
ADD the words “or Pea Gravel or NYS DOT #1A Crushed Stone Consolidated with a
Plate Tamper in 12 inch Lifts. Flowable Fill Shall Not be Acceptable in place of
Compacted or Consolidated Stone” after the words “Run of Crushed Limestone
Compacted in 12 inch Lifts”.
Item 11. On Drawing P001 – Title Sheet, Symbols, Schedules, Notes & Details, Detail 2/P001:
ADD the words “One Pipe Diameter Minimum” after the words “Varies (Typ)”.
ADD the words “NYS DOT Type 1A or 1” after the words “Crushed Stone”.
Item 12. On Drawing P100 – Underfloor Piping Removal Plan – North:
ADD the note “Invert Elevation to Match Existing. Assume 48˝ Below Finished Floor” at
the storm line exit at building foundation south of Column Line 59.
ADD the note “Pull 6˝ Existing Pipe Out of Existing Manhole. Insert Main Pipe and
Repair Opening and Bench Walls with Non-Shrink Grout” at pipe entrance to existing
sanitary manhole.
ADD the note “Owner Will Relocate Restroom Lockers Out of Work Area” in Room
1538 Men’s Locker Room.
ADD the note “Owner Will Relocate Equipment Away From Work Area” in Room 1647
Maintenance.
ADD the note “Use Care to Avoid Damaging Pavements, Trees, and Building Finishes.
Contractor Shall Be Responsible For Restoration of Damaged Areas. If Proper Care is
Employed, Restoration May Be Limited to Topsoil and Seed” adjacent the sanitary
manhole.
Item 13. On Drawing P100 – Underfloor Piping Removal Plan – North, Removal Notes:
ADD the following to Note 2:
“Pipe routing was developed from As-Built Drawings and was further inspected with TV
and previously excavated at three locations. Contractor may assume piping routing shown
is accurate.”
ADD Note 6. as follows:
“6. For basis of bidding, assume floor saw cuts will not encounter any in-slab
conduits.”
ADD Note 7. as follows:
“7. Location of dumpsters shall be adjacent to Column Line 69 and minimum 10 feet
from building. Location shall be coordinated with Cornell Project Manager.
Dumpsters shall be screened from view on the road side with 6΄ high pedestal
metal fencing with green sight covers. Anchor fencing to minimize overturning
due to wind.”
Item 14. On Drawing P101 – Underfloor Piping Replacement Plan – North:
REVISE note at sanitary pipe exit through foundation wall as follows:
“Remove Exist 6˝ Sanitary Through Building Concrete Foundation Wall. If Hole is
Oversized, Provide Pipe Sleeve per Detail 7/P001 and Seal with Non-Shrink Grout. If
Opening is Clean and Correct Size, Insert Pipe and Seal with Non-Shrink Grout.”
ADD Note 9. as follows:
“9. Contractor may assume that at locations where risers are adjacent building
column foundations, piping will be one of the following:
a. Capable of removal and replacement without disturbance of structural
foundations.
OR
b. Portion of piping not able to be removed will be reconnected and revised
after review of the Engineer.
OR
c. Portion of pipe not able to be removed will be abandoned in place after
review of the Engineer and a new pipe installed which clears the
disturbance, and considered additional work if significant re-work is
required.”
Item 15. RFI Questions and Clarifications
See attached RFI Log (Items 1 - 8)
Attachments: Photos
Specification 09 30 00 – Ceramic Tiling from CU SAS Summer 2012 Bathroom
Alterations
****END OF ADDENDUM****