125 CEDAR 1 OF 2

NYC 9/11 Public Portal Document

Cleaning Prtxedures For ___ 125 Cedar Street

approval must be received from the NYCDEP for decontamination enclosure system placement and phasing of clean-up activities.

(8) Initially, the interior of the elevator shaft, including the top of the elevator car and the elevator pit, shall be HEPA vacuumed and wet wiped to allow for the use of the elevator during the clean up. Once the clean up throughout the building is complete, the elevator shaft, including the top of the elevator car and the elevator pit, shall be re-cleaned prior to clearance air monitoring.

(9) Isolation barrier locations (i.e.: wall or ceiling penetrations, windows, vents, doors, etc.) shall be HEPA vacuumed and wet wiped prior to installing two-layers of 6-mil polyethylene sheeting and sealed with tape.

(10) Negative pressure ventilation equipment shall be installed and operated continuously 24 hours per day during all clean-up activities. Equipment shall run continuously until clearance air monitoring. A minimum of one air change every 15 minutes shall be provided. When ducting to the outside is not possible, a second negative air unit compatible with the primary unit may be connected in series.

(11) A staging area shall be established within each unit for cleaning the surfaces of moveable items.

(12) All debris and/or dust shall be misted and double bagged. Accumulation of water is prohibited. Water Existing shall be sufficient to wet the material without water accumulations. Caution shall be taken to a^'oid wetting items that may be damaged by wet methods. An encapsulating agent shall not be applied. Once all surfaces have been wet wiped and HEPA vacuumed a second cleaning shall be performed. Surfaces include but are not limited to walls, floors, ceilings, ledges, windowsills, trims, appliances, equipment, personal items, and furnishings.

(13) Surfaces that may not be wet wiped shall be HEPA vacuumed three times or disposed as ACM waste. EHsposal of material may not occur without prior authorization by the building owner and/or tenant, as applicable. Items identified by tenants for cleaning that cannot be cleaned shall be immediately brought to the attention of DEP.

(14) Tenant and/or owner, as applicable, must identify items to be cleaned or disposed.

a) Certain items, including but not limited to, TV’s, VCR’s, microwave ovens, CD players, DVD players, toasters, fin radiators, upholstery, carpeting, etc., are to be cleaned via wet wiping and/or HEPA vacuuming techniques. Compressed dry air (low pressure) shall be used to blow debris/dust from openings/crevices in the equipment. HEPA vacuuming must be preformed in conjunction with this procedure. Care must be taken not to damage the items. It may not be possible to thoroughly clean these items. Tenants and/or owner shall identify items for disposal or cleaning with clearly legible tags. Items identified for disposal shall be double-wrapped in 6- mil polyethylene sheeting and labeled as ACM waste or bagged in labeled ACM waste bags. cleaning of items to be disposed is not required. __

b) Built-in items; i.e. dressers, window boxes, perimeter ventilation unit covers, bookshelves, etc. shall be wet wiped and HEPA vacuumed. The contractor shall be responsible for moving built in items that may impede access to surfaces that require clean up. However, the cleaning contractor

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NYC-WTC_000155986