C04_Attachment 1 SOW 1232SA26Q0884.docx

Agricultural Research Service

U.S. DEPARTMENT OF AGRICULTURE

Roof Leak Repairs Page 2 of 8

STATEMENT OF WORK

Roof Leak Repairs Bldg. 1 and Bldg. 80

USDA ARS Jamie Whitten Delta States Research Center Compound

141 Experiment Station Road Stoneville, Mississippi 38776

National Biological Control Laboratory 59 Lee Road Stoneville, Mississippi 38776 Asset ID: 640200B001,640200B080

1. PROJECT INTRODUCTION

1.1. PROJECT TITLE

Roof Leak Repairs Bldg. 1 and Bldg. 80.

1.2. PROJECT BACKGROUND AND PURPOSE

The USDA, Agricultural Research Service (ARS), Jamie Whitten Delta States Research Center Compound, Buildings 1 and 80 are both Located in Stoneville, MS.

These buildings are located within the fenced-in compound on the Stoneville Campus at 141 Experiment Station Road and 59 Lee Road.

This contract is to provide correction of roof leaks in Bldg. #1 and #80. Building #1 will require removal of existing roof drain domes and the drains sealed as shown per this document. Building #80 will require masonry parapet brick walls to be sealed and a to install a metal panel wall system over the brick as shown below in this document.

1.3. PROJECT CONTACT PERSONS

CONTRACTING OFFICER’S REPRESENTATIVE (COR)

David Jordan, Maintenance Supervisor 662-820-8060 Dwayne.Jordan@usda.gov

LOCAL POINT OF CONTACT(LPOC)

Roger Bright roger.bright@usda.gov

CONTRACTING OFFICER (CO)

TBD, Contract Specialist USDA, ARS, ARM, Southeast Area 662-xxx-xxxx @usda.gov

ADMINISTRATIVE OFFICER (AO)

Darren Middleton

(662) 232-2908 darren.middleton@usda.gov

ENGINEER PROJECT MANAGER (EPM)

Kevin Magee, PE USDA, ARS, SEA Facilities Engineering 662-336-0712 kevin.magee@usda.gov

2. SCOPE AND OBJECTIVES

2.1. DESCRIPTION OF WORK - The following descriptions of work contain excerpts from a 2024 Toland-Mizell Investigative Study that was conducted to identify the sources of building envelope leaks and to suggest countermeasures to eliminate water penetration. The full report is available for inspection.

Building 1

Building 1 covers a footprint that measures overall 239 feet by 175 feet including lower levels. A tower portion is located at the northern extent of the overall footprint that measures 239 feet by 55 feet and is five stories in height, plus a smaller penthouse area that measures approximately 68 feet by 46 feet.

Roof drains are shown below and will require sealant mastic for (11) drains.

Building 1 Roof Drain Locations

The Contractor must furnish all personnel, equipment, tools, materials, supervision, and quality control necessary to seal all roof drains. The roofing system is modified bitumen roof membrane. The assemblies appear to be a Josam Series 21500 drain assembly with a cast iron dome. See drain installation detail below.

Missing Sealant Highlighted.

Contractor will remove each dome clamp ring and install sealant as shown, at each clamp ring, and as necessary at top of PVC pipe drains, with Conklin’s 360-S urethane sealant or approved equal.

Sealant

Building 1 Typical Roof Drain with Dome Removed

Building 80

Building 80 is located at the southwest corner of the developed area of the ARS Stoneville, MS campus and is one story in height plus a mechanical penthouse level in the attic space. The original construction of the approximately 56,000 square foot building was completed in December 2004. The building consists of two laboratory wings, each measuring approximately 260 feet by 95 feet, joined by a center section that houses administrative and meeting facilities measuring approximately 112 feet by 48 feet.

The structural system of the building consists of a structural steel frame with perimeter strip and interior isolated foundations. The roof system is primarily sloped with smaller areas of flat roofs. The sloped roofs are composed of structural steel members with cold-formed light gauge roof purlins, metal decking, and standing seam roofing panels. The flat roof areas are composed of structural steel framing, metal roof deck, and a modified bitumen roofing membrane. Building 80 has a brick masonry façade with a precast concrete accent band extending around the perimeter of the building at the sloped roof eave height. Rainwater is directed away from the building by gutters at the sloped roof areas and interior roof drains at the flat roofs. No extensive renovations or additions affecting the envelope or façade were noted to have been undertaken since the original construction.

Parapet to Pitched Roof Transitions – One end of the west parapets of both the north and south connectors terminates into a pitched roof. It appears the sheet metal flashing installed during the original construction is not adequate to prevent water from entering the building during heavy directional rainfall. These areas appear to be a large contributor to the leaks noted in the connecting corridors. To repair this condition, flashing details need to be developed and installed. Contractor is responsible for submitting Detailed Engineering Shop Drawings for parapet to pitch roof transitions for approval by USDA EPM.

Brick Wall Flashing Transitions – At the other end of the corridor parapets, adjacent to the Center Section, the exterior wall parapets terminate into a brick wall that extends away from the exterior of the building. In these two locations, the brick wall is supported by structural steel beams as the wall extends into the sloped center section roof. Although flashing is present in the area where the wall is above the flat roof, no direction regarding flashing where the wall is over the sloped roof was provided. Any water entering the air space behind the brick has no means of exfiltration and is forced into the building interior. These leaks, along with the leaks mentioned above, appear to be the source of the water ingress issues in the connecting corridors. Similar to the other end of the parapet, flashing details need to be developed for this area and installed. Contractor is responsible for submitting Detailed Engineering Shop Drawings for a metal panel wall system over brick parapet walls for approval by USDA EPM.

Parapet to Pitched Roof Transitions

Building 80 Overall View Building 80 Scope Area

B80 South Parapet to Center Section Interface B80 North Parapet to Center Section Interface

It appears the water management path in place in the area where the parapet is positioned over an adjacent roof only allows water that has entered the brick air space to exit within the building. In these areas, there appears to be through wall flashing under the coping, and then no other flashing between the sheathing and brick. Water entering this space travels down, in the air space, and onto the structural steel beams below. Once on the beams, the water travels and spreads out horizontally on the top flange until enough collects to spill over. Some of this water falls to the top of the ceiling tiles, while the rest lands on the top of the bottom flange, where it travels and spreads out horizontally until it collects sufficiently to spill and fall into another area. This sequence was noted to be the primary mechanism of water ingress at the west elevations of both the northern half of the southern corridor and the southern half of the northern corridor.

Brick Wall Flashing Transitions

B80 South Parapet-Roof Interface B80 North Parapet-Roof Interface

A new, properly designed flashing transition piece will be required. This piece should interface solidly with the parapet and should lap beneath the roofing an adequate distance to prevent driven rain from climbing the slope. Sealant should be integrated into the detail between the flashing and the underside of the standing seam roofing. Sealants in this location can provide a barrier against water intrusion while being protected from damaging ultraviolet sun rays.

Contractor will submit detailed shop drawings with flashing details to install a metal panel wall system on top of the brick. Conceptual design shown below. Contractor is responsible for the final design, details, and shop drawings. The system would be installed on the brick side only, from the parapet to 8” above the roof surface with a drip edge at the bottom of the panel. The system would be closed with metal cap flashing over the existing stone coping.

Hairline fractures in parapet masonry above the roof will require the application of a water-repellant product similar to Siloxane.

Parapet Wall Section Detail

Conceptual Design Section Details

Conceptual Design Details

2.1.1. Clean up and remove all debris.

2.2. No Government equipment will be available for use by the Contractor. Government will supply necessary utilities such as electricity, water, etc.

2.3. LOCATION OF WORK

The project is located at the USDA ARS main Stoneville campus, 141 Experiment Station Rd. Stoneville, MS 38776

Stoneville Campus Figure 1 Main Campus

Bldg. 1

Bldg. 80

2.4. PRE-BID SITE VISIT

Bidders must attend a mandatory site visit to get familiar with the existing conditions, work requirements, and to confirm locations, dimensions, and conditions of the project before a quote is submitted. The purpose of a site visit is to observe 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 detail definite provisions for adjustment in cost or extension due to existing conditions not readily foreseeable.

2.5. Past Experience on Similar Projects

Contractor should submit past experience for (3) similar projects completed, with Contract Number, Project Costs, and Project Contacts

3. PROJECT SCHEDULE

3.1. The period of performance for this project is 120 calendar days after award.

3.2. Location work hours are 7:00 am and 4:00 pm, local time, Monday through Friday; federal holidays are excluded. Any changes to work schedule must be submitted to CO for written approval prior to any schedule change.

4. GENERAL REQUIREEMENTS

4.1. SAFETY

The Contractor must submit a Site Safety Specific Plan/Accident Prevention Plan (Plan) in industry recognizable format to the COR before any field work is performed. The Plan must include phone numbers and maps to emergency medical facilities. The Government will review and approve the Plan before issuance of the NTP.

4.2. QUALITY CONTROL

Provide quality control to ensure that all components of project work meet the requirements of the contract specifications. Ensure that all work not acceptable or compliant with the specifications is corrected prior to inspection or review by the COR. Quality control is the exclusive responsibility of the Contractor.

4.3. PROTECTION OF WORK AND PROPERTY/SAFETY REQUIREMENTS

4.3.1. The Contractor must protect the work, the site, and all existing property and structures within the limits of the construction activities or that may be affected thereby until acceptance of the work. Any damage to property must be repaired at the Contractor’s expense to pre-damaged condition to the satisfaction of the COR.

Safety and health matters, as they relate to the work, are the exclusive responsibility of the Contractor. The Contractor must furnish, erect, and maintain barricades, warning lights, signs, guards, or take other precautions as may be required by law or local authorities of the protection and security.

4.3.2. Coordinate all work with the COR and Local Point of Contact so that any disruptions can be kept to a minimum and to prevent any negative impacts to research.

4.3.3. The Government will not furnish any labor or equipment to unload or move materials or supplies.

5. UTILIZATION OF BIOBASED PRODUCTS

The Contractor must 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 or detracting from the overall quality delivered to the Government. All supplies and materials must 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: www.biopreferred.gov.

6. HAZARDOUS MATERIAL

The work involved in this SOW is not suspected to involve any hazardous materials. Existing conditions are reflected correctly to the best of USDA’s knowledge. If hazardous materials are found to be present, it must be reported to the CO & COR for further action.

7. DISPOSAL OF REMOVED MATERIALS AND DEBRIS

7.1. The Contractor must dispose of removed, materials, waste, trash, and debris in a safe, acceptable manner, in accordance with applicable laws and ordinances and as prescribed by authorities having jurisdiction.

7.2. Burying of trash and debris on the site is prohibited. Burning of trash and debris at the site is prohibited.

7.3. Remove trash and debris from the site at frequent intervals so that its presence will not delay the progress of the work or cause hazardous conditions for workers and the public.

7.4. Removed materials, trash, and debris must become the property of the Contractor and must be removed from the project site and be disposed of in a legal manner. Location of disposal site and length of haul are the Contractor's responsibility.

7.5. The contractor should make every effort to recycle as much of the construction debris as possible.

7.6. Any waste materials encountered during the demolition that are found to contain lead, asbestos, polychlorinated biphenyls (PCB), fluorescent lamps, or any hazardous substances are to be handled and removed in accordance with local, state, and federal laws and requirements concerning hazardous waste as well as any specific hazardous waste requirements stated in different sections.

7.7. Comply with hauling and disposal regulations of authorities having jurisdiction, per federal, state, and local requirements.

8. TEMPORARY FACILITIES

Temporary utilities (water and electricity) may be furnished to the Contractor by the Government, if so requested. The Contractor must maintain and protect all such utilities during the course of construction and must repair or replace any items damaged through its own negligence. Should the Contractor require any power or utility shutdowns during construction, the Contractor must obtain approval for such shutdown from the COR three (3) working days prior to the need.

9. CLEANUP

The construction site must be kept clean and free of debris at all times. Restore areas disturbed as nearly as possible to the original appearance and condition. Upon completion of the project, and prior to final inspection, the Contractor must remove from the premises all unused material, trash, and debris resulting from the work to the satisfaction of the COR.

10. SUBMITTALS

Submittals on all material incorporated into the work must be submitted to the EPM, COR, and Contracting Specialist. Electronic submittals are acceptable, otherwise three (3) written submittals are required.

10.1. Site Specific Safety Plan within seven (7) days of award (see Section 4.2).

10.2. Any additional material, including designs, shop drawings, and specifications, used on this project.

11. INSPECTION AND ACCEPTANCE

A government representative will inspect and approve the work performed on this project. The Contractor must schedule inspection a minimum of three (3) days in advance, in writing, to the COR and CO.

12. FINAL PAYMENT/CONTRACT CLOSEOUT

The following documents are required prior to final payment (other documents may also be required): Release of Liens, Release of Claims, Employee Payroll\Timesheets, and Invoice.

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