Attachment 1 Part I-Section C-Description_ZAU IIJA Underground Utility Improvments.pdf

IIJA UNDERGROUND UTILITY IMPROVEMENTS PAGE 1 OF 3

CHICAGO ARTCC JULY 2024

AURORA, ILLINOIS

PART I - SECTION C

DESCRIPTION / SPECIFICATIONS

SCOPE: This transmittal covers the Underground Utility Improvement on the North side of the Automation Wing, the Southeast parking area, and the Sump pump basin at the Chicago ARTCC in Aurora, Illinois.

Work under this transmittal includes but is not limited to the following:

1. General:

a. Install temporary erosion and sediment perimeter controls and a construction safety fence around the work area.

b. Locate all utilities in and around the construction/work area prior to any excavation.

c. Reference drawing shall be used as a guide to locate and find existing utilities.

d. Soils at the project site have been tested and contain trace amounts of heavy metals and need to remain on site. Coordinate with FAA engineers for details if stock piling and disposal is required.

e. Any work in Confined Spaces shall be done in accordance with OSHA Requirements 29 CFR 1910.146 and 1926.21(B)(6).

2. Demolition/Excavation:

a. Vacuum excavation shall be utilized for the first 8 feet of any excavation and 2 feet below any existing utility.

b. Contractor to design dewatering and shoring systems to protect excavation.

c. Existing/remaining storm water lines shall not be broken or tied in until the inlets and manholes are installed. Provide temporary pumps and power to remove water from the basin to complete construction. Temporary pumps can be discharged at the closest manhole down slope of the existing storm lines.

d. Excavate to required depth for the installation of the replacement stormwater lines and manholes.

e. Excavation to the required depth for the replacement of the stormwater lines and for the installation of the dry swale basin.

f. Excavate to required depth for the installation of the downspout lines.

g. Demolition of the existing pavement and walks in the project area.

h. Demolition of the damaged pavement to the north of the Power Service Building.

i. Selective demolition (concrete cutting and removal) of pavement in the area of the new stormwater line connection.

j. Selective demolition (concrete cutting) of pavement in the area of the re-directed floor drain.

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k. Excavation outside the West side of the Control Wing. Excavations complete with all excavation protections and dewatering needs to facilitate the installation of a new 8-foot internal diameter (ID) precast concrete basin and connections to Facility’s existing storm water sewers.

3. New Work:

a. Provide shop drawings and coordination drawings for the inlet system.

b. Regrade project area to meet designed drainage plan. Include fill and compaction as required.

c. Install/replace the existing below grade stormwater line connecting the facilities downspouts to the existing stormwater system with new 10-inch HDPE piping and fitting. Tie in all 6 downspouts, the existing French drain, the new dry swale with drain, and manhole to the site's storm water system.

d. Install below grade stormwater line connecting the facilities downspouts to the existing stormwater system with new 4-inch PVC piping and fitting. Tie in all 3 downspouts to the site’s storm water system. (Remove redundant tasks as required based on final design.)

e. Install dry swale with drain system that will connect to the new storm water line.

f. Furnish and install a precast 3-foot ID concrete manhole into the excavated area.

Basin shall have a precast base, extensions and top with provisions for access cover, inlet and outlet.

g. Install two new precast 3-foot ID concrete manholes into the excavated area.

Basin shall have a precast base, extensions and top with provisions for curb inlet cover, pipe inlet, and pipe outlet.

h. Replace floor drain and the connecting storm water line with new redirected 3-inch HDPE piping.

i. Replace existing floor drain with clean-out cover.

j. Connect the existing facilities downspouts to the existing stormwater system.

Backfill excavation in 6-inch lifts and remove shoring.

k. Install new pavement, curb, and gutter for the area in the vicinity of the dry swale and new manhole.

l. Install new pavement, curb, and gutter for area north of the southeast parking lot.

m. Grade and re-seed area and pour new concrete walkway.

n. Installation of an 8-foot ID precast concrete basin, with access door, ladder, and safety/maintenance platform. Inlet from the original 12-inch storm sewer. Outlet 8-inch discharge to 18-inch storm water sewer.

o. Installation of a duplex sump pump system, complete with pumps, piping, pump removal system, electrical and control needs to eject the storm water from the basin into the Facilities higher elevation storm water sewer.

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p. Connection to Facilities Building Automation System for remote monitoring and operation.

q. Provide factory start up and factory training on this duplex pump station.

r. All other work as shown on the Drawings and in the Specifications.

4. Scope Notes:

a. Flow of work, as presented on the Scope of Work, is suggestive of minimum work to be accomplished and may be reordered or re-prioritized based on expediency or project.

b. Contractor shall furnish all materials, equipment, and labor to complete the job in an orderly and timely fashion.

c. Prior to demobilization, the work sites and staging areas shall be made clean and if damaged restored to its original state. Damage to any components or any facility property, during construction activity due to contractor’s unauthorized actions or actions not part of this project scope, shall be corrected or replaced at the expense of the contractor.

(END OF CLAUSE)