Unit 4D - 4th Floor, Northeast comer, Liberty Street
Cleaning Method: Test 2A - Surface cleaning using HEPA filtered vacuums. Air filtration
not required. Soap and water wet wipe of all horizontal surfaces
Equipment Used: Craftsman® Shop Vacuum, Hoover® Upright Vacuum
Filtration Status: HEPA
Unit Size: 968 sq. ft.; 9,196 cu. ft.
AFD Status: Not Required
AFD Specifications: N/A
Unit Air Exchange Rate: 22.99 min @ 400 cfin
Minimum Air Exchange Required: Every 30 minutes
Unit Description: This 968 sq. ft. open loft faces the WTC site. The unit has hardwood
floors and no carpeting. All exterior windows had been blown inward. Significant dust had
accumulated in the dwelling. All personal possessions to be retained by the tenant were
vacuumed and bagged.
Difficult Areas Encountered:
• Exterior windows and sashes
• Hydronic baseboard heating units
• Boarded window openings
• Cracks and crevices
• Tenant possessions required special attention
10
NYC-WTC_000145186
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000145186Source: NYC Law Department, mirrored locally
Document excerpt acknowledging contributors and outlining the collaborative scope of an EPA environmental protection study regarding the World Trade Center site.
EPA transmits revised statements of work for WTC cleaning and monitoring activities incorporating modifications and additions discussed in interagency meeting.
EPA Region 2 letter regarding revised environmental work plan submission for two buildings including asbestos, health, and safety assessment components.