Law Department notice on WTC document preservation, Oct 2001

NYC 9/11 Public Portal Document

The Barber Shop. Test: 4A- Industrial HEPA-filtered vacuum, AFD. Test 4E- Water wet wipe of all horizontal and vertical surfaces. This 1,268 sq. ft. open space facing the WTC Site is located below grade to Liberty Street. The front door of the business was blown inward depositing significant amounts of dust and debris down the staircase into the rental space. Floor areas were covered with ceramic tiles; the ceiling is a suspended system using fibrous tiles. Above the suspended ceiling is a void space which accommodates flexible A/C ducts, electrical conduit and lights. All structural support members above the ceiling were encapsulated with a non-asbestos insulating material. Equipment including chairs, wash sinks, counters and hair care displays were located in the shop. The head space above the entrance door houses an A/C condenser/compressor unit that was heavily impacted with WTC contaminated dust and debris. Ceiling tiles, flexible duct, chairs, display shelving and hair care merchandise were disposed of prior to cleaning. Ancillary rooms are adjacent to the shop space that extends under Liberty Street. These rooms have earthen floors and are believed to be associated with utility companies. They were not cleaned.

Exterior A/C Condenser/Compressor Units

A/C Condenser/Compressor Units. Test: 2A- Craftsman® shop vacuum, HEPA, no AFD. Three commercial condenser/compressor units and four residential condenser/compressor units were inspected to determine if they required cleaning of WTC-related dust. No significant dust was present on the exterior and interior surfaces of the four residential units. It is believed that the condenser/compressor units were cleaned prior to the study, by contractors retained by the owner, to remove dust and debris from the building roof. The three commercial condenser/compressor units had minimal to moderate WTC-related dust/debris.

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NYC-WTC_000145175