Law Department notice on WTC document preservation, Oct 2001

NYC 9/11 Public Portal Document

Unit 5D. Test: 3B- Industrial HEPA-filtered vacuum, AFD. Soap and water wet wipe of all horizontal surfaces. This 1,024 sq. ft. open loft faces ground zero. All personal items removed prior to cleaning. Windows blown in, hardwood floors, no carpet. Significant accumulation of dust in dwelling.

Fifth Floor Hallway. Test: 4A- Industrial HEPA-filtered vacuum, AFD. Test: 4B- Soap and water wet wipe of all horizontal and vertical surfaces (this hallway, ceiling only). Plywood floors, sheet rock walls covered with wallpaper glue, painted sheet rock ceiling. Minimal dust accumulation.

Liberty Street Staircase. Test: 4A- Industrial HEPA-filtered vacuum, AFD. Test: 4B- Soap and water wet wipe of all horizontal and vertical surfaces. Cast concrete steps/landings, sheet rock walls and ceiling. All surfaces covered with gloss paint. Minimal dust accumulation.

Cedar Street Staircase. Test: 4A- Industrial HEPA-filtered vacuum, AFD. Test: 4B- Soap and water wet wipe of all horizontal and vertical surfaces. Wood steps/landings, sheet rock walls and ceiling. Floor covered with vinyl tiles, walls and ceilings covered with gloss paint. Minimal dust accumulation.

Commercial Units

Chiropractor’s Office. Test: 4A- Industrial HEPA-filtered vacuums, AFD. Test: 4B-Soap and water wet wipe of all horizontal and vertical surfaces. Test: 4C- Carpet cleaning using a commercial carpet wet vacuum with warm water. Test: 4D- A/C Duct Cleaning. Test: 4E- Cleaning of bathroom tile floor and desk top wet wipe using water only. This 716 sq. ft. office space with 4 examination rooms faces ground zero. All front windows were blown in. Excessive amounts of dust present on all horizontal and vertical surfaces. Floor areas covered with wall-to- wall carpeting; suspended ceiling covered with fibrous tiles. A two foot high void space was above ceiling. Ceiling tiles, flexible ventilation ducts and office equipment were removed and disposed of prior to cleaning. Void space contained HVAC system, and wood floor joist system for third floor apartment. This area contained WTC-related and non-WTC-related dust. The space was extremely difficult to clean due to the present of electrical wires, recessed lighting fixtures, sprinkler systems and the dry friable nature of the wood support system.

Mattress Store. Test: 4A- Industrial HEPA-filtered vacuums, AFD. Test: 4B-Soap and water wet wipe of all horizontal and vertical surfaces. Test: 4C- Carpet cleaning using a commercial carpet wet vacuum with a warm water shampoo solution. Test: 4D- A/C Duct Cleaning. Test: 4E- Cleaning of vinyl floor tile and window ledge wet wipe using water only. This 968 sq. ft. open space faces ground zero. All front windows blown in, excessive amounts of dust present on all horizontal surfaces. Floor areas covered with wall-to-wall carpeting and approximately 25 display mattresses and box springs. Ceiling tiles, mattresses, office equipment and flexible ventilation ducts removed and disposed of prior to cleanup. Void space above suspended ceiling exhibited same characteristics as in the Chiropractor’s office.

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