EPA review letter, 133-135 Greenwich Street

NYC 9/11 Public Portal Document

Part III — Health & Safety Plan 133-135 Greenwich Street/21-23 Thames Street Airtek Project 05-0701 — Rev 3, August 29, 2005

Table 2-2

Action Level lox OSHA PEL 100 X OSHA (Protection PEL (Protection Contan>anaats OSHA PEL (Half value of Factor for factor for Half- OSHA PEL) 'EL) face APR face PAPR) Asbestos 0.1 PCc 0.05 ficc I f/cc 10 f/cc Antimony 0.5 m +ni 0.25 +m 5 mg/n? 50 /m Barium 0.5 ni 025 wig/ n' 5 mg/n? 50 .m Beryllium 0.002 mg/m3 0.001mg/n? 0.02 rn +m 0.2 m rn Cadmium 0.005 mg/m' 0.0025 mg& 0.05 In m 0.5 mg/m' Chromium III 0.5 m 025 /m 5 mg/n? 50mg/n? Copper I mg/n? 0.5 m rn 10 /n 100mg/n? Lead 0.05 m ,m 0.025 ,Yu 0.5 rn m 5 m /rn Manganese 5 /in 2.5 mg/n? 50 n' mg/ 500 ,rZr Meitury 0.1 mg/in' 0.05 /n I mg/n? 10 ;m Nickel I /n 0.5 mg/n? 10 /n 100 Zinc 5 /m 2.5 m ,m 50 :m 500mg/n?

2.8 SITE CONTROL

Site control measures shall be implemented to protect the public and personnel working on-site. The aspects of site control shall address general access to the site; and access to the building and site during the deconstruction phase.

Fences, guardrails and access devices, including ladders, stairways, and walking surfaces shall be provided and maintained throughout the project activities in accordance with 29 CFR 1926. In addition, barricades, warning signs, temporary lighting and other safety measures shall be provided, as required, to protect site personnel.

All visitors to the site shall report first to the Contractor field office. Visitor access shall be limited to the Support Zone and Level D operation areas only, and shall be allowed only with the prior consent of the Contractor NYCSSM and the Contractor Site Manager.

No visitor (other than regulatory inspectors) shall enter a work area unescorted by a Subcontractor or Contractor representative. The presence of any regulatory agency on-site shall be reported immediately to the Contractor Site Manager.

2.8.1 Work Zones

Entry into the work zones begins once a person comes on-site. This approach reflects the dynamic nature of the operations and the need for everyone to be aware of the conditions while on-site. Using the concept of three zones for the site, the following areas are identified:

• Support Zone — This area starts at the project/property fence line and extends to the entry to where personnel enter the building to complete the work tasks. This area includes the ground outside of the building and any office spaces. In this area all personnel shall wear Level D PPE. Within this area exclusion zones may be established depending on the operations, for example:

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NYC-WTC 000134394