DEP Comments on WTC Dust Cleaning Scope of Work Draft,

NYC 9/11 Public Portal Document

Scope of Work B

Application: A visual inspection was performed and the presence of accumulations of debris (including large or significant amounts of dust) from the collapse of the WTC was identified by EPA or designee. @ In some unique circumstances, Scope B may be applied on a limited basis within a unit as determined necessary by the Monitoring Contractor in consultation with EPA.^ Residents may be present depending on these unit specific circumstances. In cases where clean up, areas can be isolated by closing doors or by the erection of containment barriers, the resident ma)^Spf^ent in the unit. In all other applications of Scope B it is assimqd that residents willlhot be present. . vol 1. A site specific work plan will be prepared for revi^'and approval by EPA prior to t^^tart of work. This work plan will include detailed procedures foj^e removal W^a^^Webris and the cleaning. ■ V

2. An ACP-7 form asbestos project notification form shall be submitted, as required by Title 15, Chapter 1 of the RCNY, directly to the NYC DEP Asbestos Control Program prior to the start of work. NYS DOL notification shall be submitted.

3. At least one asbestos supervisor shall be present at each work place (work place is defined in Title 15, Chapter 1 RCNY as the work area and the decontamination enclosure system).

4. Personal protective equipment including disposable clothing, gloves, and respirators shall be worn during this clean-up activity^^^^anceawWOSHATBlS’aSr^SionsZ^ fl 5. Warning signs shall b®^os|qd at the approach to the work area.

6. A worker decontamination enclosure system shall be installed at the entrance to the work area. A remote decontamination enclosure system shall be considered when appropriate i.e. inability to compivIM^me, provision due to space limitation or other agency rules, such as for compliance witli NYCED egress requirements.

7. systems sh lut down and locked out or isolated locally. The site specific work plan shall provide additfonal information on the HVAC system and proposed procedures for shutdown or isolatiSi.

8 Isolation barriers shall be installed with two layers of 6-miI polyethylene sheeting and sealed witlilape.

9. ■ Negative pressure ventilation equipment shall be installed and operated during all clean-up activities. Equipment shall run continuously until clearance air monitoring. A minimum of one air change every 30 minutes shall be provided. When ducting to the outside is not possible, a second negative pressure ventilation unit compatible with the primary unit capacity may be connected in series.

NYC-WTC_000140521