2.1 SOW MOLD REMEDIATION IN BUILDING 007 v3.docx

UNITED STATES DEPARTMENT OF AGRICULTURE

BELTSVILLE AGRICULTURAL RESEARCH CENTER

10300 BALTIMORE AVENUE

BELTSVILLE, MARYLAND 20705-2350

SCOPE OF WORK

MOLD REMEDIATION IN BUILDING 007

February 2023

1. SCOPE OF WORK

The Contractor shall remove and treat mold hazards from the areas in building 007 identified in industrial hygiene reports attached to this Scope Of Work (SOW) in the Appendix A, and to provide additional testing as identified in the SOW. The building is located at the United States Department of Agriculture, Beltsville Agricultural Research Center in Beltsville, Maryland. The work will be accomplished in two phases:

1.1. Demolition and Removal of Compromised and Water Damaged Building Materials

1.2. Testing of airborne mold concentrations, for safe levels for occupancy.

2. GENERAL

The work shall be accomplished in a manner that conforms with the intent of all applicable U.S. Environmental Protection Agency (EPA) and U.S. Occupational Safety and Health Administration (OSHA) laws and regulations pertaining to mold remediation. Take all precautions against the spreading of biological dangers and airborne particulates created during removal and treatment, and protect against contamination to other parts of the building, including protective measures for mission critical building occupants or remediation workers during this process. Completion of both phases shall render the building areas safe for re-occupancy and future reconstruction.

2.1. Standards

This listing is not all inclusive but serves as a minimum as applicable guidance:

2.1.1. EPA - https://www.epa.gov/mold/mold-remediation-schools-and-commercial-buildings-guide-chapter-3

2.1.2. EPA - https://www.epa.gov/mold/mold-remediation-schools-and-commercial-buildings-guide-chapter-4

2.1.3. EPA - https://www.epa.gov/mold/mold-remediation-schools-and-commercial-buildings-guide-chapter-5

2.1.4. OSHA – https://www.osha.gov/mold/standards - 1926 Subpart E – Personal Protective and Life Saving Equipment

2.2. Findings

The following report documents are included within the Appendix A:

2.2.1. Environmental Health Consultants LLC January 3, 2023

Limited sampling for suspect asbestos containing materials and lead testing of 12/30/2022.

2.2.2. Environmental Health Consultants LLC January 4, 2023

Limited assessment for water damage and mold growth of 12/30/2022

2.3. Processes

The following requirements apply:

2.3.1. Microbial remediation signs shall be posed where applicable to limit unauthorized entry to the remediation areas.

2.3.2. Contractor personnel shall always wear properly fitted National Institute for Occupational Safety and Health (NIOSH) approved HEPA (high efficiency air particulate) filtered half-faced respiratory protection equipment while performing work in the buildings.

2.3.3. Toxic and/or obnoxious smelling compounds shall not be used for wipe-down and final cleaning. The Contractor shall submit Safety Data Sheets for adhesives or compounds.

2.3.4. Care shall be exercised so as not to damage electrical conduit in the spaces or computer and telephone lines.

2.3.5. Remediation activities shall be confined within the designated work areas to minimize inconvenience or disruption to USDA personnel.

2.3.6. The Contractor shall coordinate with USDA the shutting down of HVAC or any other mechanical systems prior to remediation activities if deemed necessary.

2.3.7. Non-skid and OSHA-compliant ladders shall be used during this project.

2.3.8. Work Schedule: The work is scheduled for 8 hours/day.

2.3.9. Project Duration: Project duration will be provided before start of work once task order has been awarded.

2.3.10. Government Furnished Equipment needs to be removed by USDA staff from affected areas.

3. PHASE 1 PROCEDURES

Follow recommendations as defined in attached reports. Note that protective measures are required relating to items identified as containing Asbestos material in flooring per report. The following are general related requirements.

3.1. Worker Training

All workers involved in the removal of microbial remediation activities shall receive at minimum hazard communication training to minimize potential adverse health effects associated with exposure to microbes and other biological vectors. Training shall include the following topics in coverage:

3.1.1. Microbial hazards including fungi and bacteria.

3.1.2. Potential health effects associated with exposure to microbes.

3.1.3. Exposure routes (e.g., inhalation, dermal, ingestion);

3.1.4. Engineering Controls; and

3.1.5. Personal protective equipment.

3.2. Personal Protective Equipment

All workers involved in the removal of microbial contaminated materials shall wear PPE assigned to minimize exposure and reduce potential adverse health effects. Recommended PPE includes the following:

3.2.1. Disposable half-face high efficiency particulate air (HEPA) filter or N95 air purifying respirator at minimum

3.2.2. Eye goggles to prevent exposure to eyes (if full-face respirator is not used)

3.2.3. Tyvek suit or other suitable protective clothing to prevent skin exposure.

3.2.4. Nitrile or Rubber gloves

3.2.5. Rubber boots

3.3. Engineering Controls

To prevent the migration of microbial contamination outside the work area install a HEPA filtered negative air system to establish negative pressure relative to adjoining spaces, with filtered discharge to outside, prior to beginning remediation activities. Install a sheet of plastic with a slit and a cover flap at the door fastened to existing floor and wall area. Turn-off and cover all Fan Coil Unit air-conditioners and other HVAC equipment using minimum 6-mil polyethylene. Seal penetrations between other floors using polyethylene or other suitable material.

3.4. Removal of Furniture and Equipment

Furniture and equipment that will not be discarded shall be moved by USDA prior to contractor performing microbial remediation activities per suite instructions. These items shall be HEPA vacuumed. All surfaces shall be cleaned using a HEPA-filtered vacuum or, if necessary, they shall be cleaned and Disinfected (follow directions listed below) before they are moved. The items shall be stored in a clean area where the items will not become re-contaminated during the remediation activities.

3.5. HEPA Vacuuming

Non-porous surfaces without heavy soil or microbial contamination shall be vacuumed using a HEPA filtered vacuum cleaner. Porous surfaces without heavy soil or microbial contamination shall brush with a minimum nylon bristled brush and vacuumed using a HEPA filtered vacuum cleaner. HEPA Vacuuming shall be the only cleanup method of all electronic equipment.

3.6. Pre-cleaning Surfaces

If visible microbial contamination or heavy soil is present on any non-porous surfaces the surfaces shall be cleaned following means and methods as prescribed by IICRC S520. The cleaning must remove and capture microbial all contamination. Thoroughly scrub all contaminated surfaces using a stiff brush, hot water and a non-ammonia soap/detergent or commercial cleaner. The excess cleaning liquid shall be collected with a wet/dry vacuum, mop or sponge. The area shall be rinsed with clean water and the excess rinse water shall be collected for disposal.

3.7. Disinfecting Surfaces

After cleaning has removed all visible microbial contamination and other soiling from contaminated surfaces, a disinfectant may be used to kill microbial contamination missed by the cleaning. The affected surfaces shall be scrubbed with an aqueous solution of 10% bleach (3cup/gallon), 5% Tri-sodium-phosphate (TSP, depending on the concentration - 2/3 cup) and 5%-mile detergent (1/3 cup/gallon). Another alternative is using a commercial Mildew Stain Remover, manufactured by ZEP or other approved alternative. The solution can be applied with a spray bottle, garden sprayer, or it can be sponged on. Collect any run-off of bleach solution with a wet/ dry vacuum, sponge or mop. Do not rinse or wipe the bleach solution off the areas being treated -- allow it to air dry on the surface. (Bleach and ammonia should not be mixed as a toxic chlorine gas may result). Bleach can irritate the eyes, nose, throat, and skin. Protect skin and eyes from contact with bleach. Test solution on a small area before treatment, since bleach is very corrosive and may damage materials.

3.8. Removing Microbial Contaminated Materials

Remove all carpets, carpet pads, walls and ceiling tiles where identified in attached reports. Also, remove heavily microbial contaminated materials such as wallboard, wood, and plaster. Inspect the remaining surfaces and remove visible microbial contamination, as needed, using the pre-cleaning and disinfecting procedures outlined above. After removing visible microbial contamination, vacuum all remaining surfaces including floors, walls, and ceiling tile grids using a HEPA- filtered vacuum. Contractor is responsible for the removal and disposal of any hazardous waste material accumulated. To prevent the spread of microbes, place all removed materials in 6-mil polyethylene bags or wrap the materials in 6-mil polyethylene plastic sheeting. If polyethylene sheeting is used, duct tape shall be applied to seal the items inside the plastic. Remove the materials from the work area and dispose with regular trash.

4. PHASE 3 PROCEDURES

After Clean up and renovation, a certifiable and calibrated moisture meter shall be used to ensure the moisture is within acceptable limits (recommended to be <18 - 20 %).

Appendix A