SOW - Cotton Gin Bldg 21 - Concrete Slab.pdf

Statement of Work

USDA Cotton Ginning Laboratory Sawcut Asphalt and Install Concrete Slab

Building #21 Asset # 640200B021

USDA Cotton Ginning Facility Stoneville, Mississippi

Prepared by:

Roger Bright January 2023

Reviewed by:

Kevin Magee 30 January 2023

Table of Contents

Location Map Page 3

Statement of Work Page 4

Contractor Responsibility Page 6 & 7

Project Schedule Page 8

Pictures Page 9 and 10

Project Contacts Page 11

Location Map

Statement of Work: Sawcut Existing Asphalt and Pour Concrete Slab @ 4000 psi.

Project Objective: The objective of this Project is to sawcut existing asphalt, excavate existing asphalt and soil, furnish/install compacted crushed limestone, pour Concrete Slab @ 4000 PSI with steel rebar. This project is on the east side of Bldg. #21 at USDA Cotton Ginning Laboratory, located at 111 Experiment Station Road in Stoneville, MS.

Site Visit:

Bidders are encouraged to visit the site and be escorted by a government representative to confirm locations, dimensions, and conditions of the project before a bid is submitted. The site visit shall be for the purpose of observing firsthand any conditions relevant to the completion of this project. No consideration will be given to claims based on lack of knowledge of existing conditions, except where Contract Documents make definite provisions for adjustment in cost or extension due to existing conditions not readily foreseeable.

Contractor must be registered in System for Award Management, (SAM), prior to submitting a bid.

Registration can be obtained through:

https://www.sam.gov

Utilization of Bio-Based Products: The contractor shall make every effort to utilize products and material based from bio-based materials as applicable, (e.g. bio-based greases; bio-based hydraulic fluids, bio-based absorbents), to the maximum extent possible without jeopardizing the intended end use of detracting from the overall quality delivered to the end user. All supplies and materials shall be of a type and quality that conform to the applicable Federal Specifications and Standards. All supplies and materials to be used in the performance of work described herein are subject to the approval of the Contracting Officer Representative (COR). Products can be found at:

https://www.biopreferred.gov

Safety: The contractor will submit a Site Safety Specific Plan/Accident Prevention Plan in industry recognizable format to the Contracting Officer within 14 days of contract award. Contractor shall furnish a Site-Specific Safety Plan (SSSP) and the Government shall review the SSSP prior to the start any construction activities. SSSP shall be in typically accepted industry format and shall contain maps, addresses, phone numbers to the nearest local Dr. Office and Hospital.

Base Bid: Contractor shall provide all materials, labor, and equipment to: Sawcut existing asphalt, approx.

8” thick, excavate @ 14” below existing top asphalt elevation, and remove excavated material from site.

Install 6” compacted dense graded crushed limestone, pour 8” thick concrete slab with ½”(#4) rebar on http://www.sam.gov/ https://www.biopreferred.gov/

10” centers both directions at mid-depth of the slab on metal chairs, with (4- 2’X2’) block outs for future construction.

• Sawcut Asphalt & Excavate: Contractor will sawcut existing asphalt, 180’ x 18’ (approximately 220 LF perimeter), @ approximately 8” thick at location as specified by on-site USDA Personnel.

Contractor will excavate asphalt and gravel/soil material to a depth of 14” below existing top asphalt elevation. Contractor will remove all excavated material from site.

• Fill Material & Compaction: Contractor will fill excavated area with 6” of compacted dense-graded crushed limestone and compact for Class A Compaction 95% Standard Density, to serve as a base for the concrete slab. The intent is for the top of the slab to be uniform in grade and slope and for the finished surface to match existing asphalt elevation as closely as possible while maintaining positive drainage to the East. Field adjustments may be necessary.

• Concrete: Contractor will pour Concrete Slab 180’ x 18’ x 8”, single mat of ½”(#4) rebar at 10” on center with metal chairs so that the mat is mid depth of the slab. Contractor will form four (4) block outs for future concrete column pads 2’ x2’ x 8”, at approximately 20’ spacing, within the slab at locations shown on site by USDA Personnel. The block outs shall be formed using metal mesh stay-in-place forms for the side walls with reinforcement bars remaining continuous through the block outs. Contractor will adhere to the American Concrete Institute guidelines and standards for concrete placement, vibration, testing, finishing, curing, hot weather, cold weather, etc. Contractor will provide the Design Mix for minimum 4000 psi. with approval from USDA EPM. The concrete slab will be sloped to provide drainage towards the East direction to approximate the cross slope of the existing asphalt. Concrete will be tested at each 20 CY of concrete by a certified concrete testing laboratory. Contractor will install a 1” expansion joint midway of slab length using 1.25” smooth dowel bars 18” long at mid slab and using 1” thick WR Meadows Asphalt Expansion Joint material or approved equal. The dowel bars shall be spaced every 12” and have an expansion cap on one end.

2 Contraction joints shall be installed at the quarter points lengthwise of the slab using 18” #8 Rebar on 12” centers. The contraction joint shall be green cut sawed to a depth of 2 ¾” on the same day as it is poured and as soon after initial set as possible.

The slab shall be poured monolithically and be screeded and straight-edged to produce a flat surface free of irregularities. The finished surface shall not have any irregularities or “bumps” which would exceed 1/8” in a 10’ straight edge bump template. Any “bumps” exceeding the bump template shall be ground to meet the stated tolerance. The surface shall have a broom finish. It can be cured either using wet burlap covered with visqueen, or W.R. Meadows Curing Compound (or approved equal). Joints shall be cleaned and W.R. Meadows Pourthane (or approved equal) polyurethane joint sealant applied.

Contractor will allow USDA minimum (2) Days to place electrical conduit(s) within the forms prior to concrete pour. This project will require on-site testing of the concrete to include, air content, slump, and temperature. White curing compound shall be sprayed on all exposed concrete after pour to prevent moisture loss. This project will require four (4) concrete cylinders taken for compressive strength from on-site concrete, per each 20 CY of pour, and broken two (2) by 7th day and two (2) on the 28th day. All testing shall be performed by a Certified Concrete Testing Lab and all Test Results shall be submitted to USDA. Contractor will clean up washout or remaining concrete from each pour from the worksite and from USDA Property at each pour.

Contractor Responsibility:

The project has a base bid to be performed per the following Specifications and Base Bid:

1. The Contractor's approved laboratory shall collect samples of fresh concrete in accordance with

ASTM C172/C172M during each concrete pour as required to perform tests specified herein. Make test specimens in accordance with ASTM C31/C31.

2. The Contractor's approved laboratory shall perform concrete slump tests in accordance with ASTM C143/C143M. Take samples for slump determination from concrete during placement. Perform tests at the beginning of a concrete placement operation to ensure that specification requirements are met.

3. Make four test specimens for each set of tests. Test two specimens at [7] days, and the other two at [28] days. Concrete strength will be considered satisfactory when the minimum of the [28]-day test results equal or exceeds the specified [28]-day strength. Concrete which is determined to be defective shall be removed and replaced with acceptable concrete.

4. Hot Weather: Maintain required concrete temperature in accordance with Figure NRMCA NOMOGRAPH FOR ESTIMATING EVAPORATION RATE ON THE BASIS OF MENZEL FORMULA in ACI

305.1 to prevent evaporation rate from exceeding 0.2 pound of water per square foot of exposed concrete per hour. Cool ingredients before mixing or use other suitable means to control concrete temperature and prevent rapid drying of newly placed concrete. After placement, use fog spray, apply monomolecular film, or use other suitable means to reduce the evaporation rate. Start curing when surface of fresh concrete is sufficiently hard to permit curing without damage. Cool underlying material by sprinkling lightly with water before placing concrete. Follow practices found in ACI 305.1.

5. Contractor will verify all dimensions and site conditions prior to beginning work.

6. Contractor will perform the work as listed in the above outlined Base Bid.

7. Contractor shall keep work area clean daily and take measures to control debris while work is being performed.

8. Contractor is required to manage the project and consult with the Government prior to beginning all work phases. And, to work in a manner that minimizes the impact of the work on Government operations, research, and functions.

9. All work must be performed in such a manner as to not adversely affect daily operations of the facility, its workers, and the onsite facility operations.

10. Contractor must always have a Superintendent on the job while working on this project.

11. Contractor will provide their own restroom facility.

12. Contractor will remove all demolished material and debris from the worksite and dispose off-site.

Material / Submittals:

The material for the entire work shall include but are not limited to those detailed above necessary to successfully complete the project and deliver a functioning system as required. Shop drawings of the proposed installation of concrete pad and canopy shall be submitted and approved prior to beginning work. Submittals on all material, including shop drawings and specifications, used on this project shall be submitted to the EPM and Contracting Specialist as noted in this document. Electronic submittals are acceptable otherwise three written submittals are required.

Installation Procedure:

Contractor will verify all dimensions and site conditions prior to beginning work. Contractor will schedule the work between working hours as listed below. Contractor is required to provide labor, specified material, equipment, and other tools required to perform the job fully and completely. No Government equipment will be available for use by the contractor. The contractor shall always be responsible for protecting his work and ensuring the safety of his crew and ARS employees. Upon completion of the project, the contractor shall remove from the premises all accumulated materials and rubbish caused by the project. Premises shall be left in a clean, orderly, and acceptable condition.

Damage to Property:

Any damage to the Government buildings, utilities, etc. caused as the result of the contractor’s activities shall be repaired or replaced to the satisfaction of the Government.

Inspection and Acceptance:

A government representative shall inspect and approve the work performed on this project. The Contractor shall schedule inspection a minimum of 10 days in advance, in writing, to the Contracting Officer.

Project Schedule:

The completion of this project shall not exceed 90 days from date of notice to proceed. A request for time extension must be submitted to the Contracting Specialist in writing prior to the period of performance expiring. Each request must include specific and detailed reasons in support of the schedule alteration.

Work Hours:

Contractor work hours shall be Monday through Friday, seven (7) A.M. to four (4) P.M. with the exception of Government holidays. Any changes to work schedule shall be submitted to Contacting Officer for written approval prior to schedule change.

Pictures:

Bldg. #21, East Side Location for Concrete Slab

Bldg. #21, Existing W8 Column and Concrete Pad

Project Contacts: TBA

To Be Determined, Contract Specialist USDA, ARS, Southeast Area Administrative Office Acquisitions, Personal Property & Fleet Management