Scope of Work Exhibit, 60 Broad Street Permit Application

NYC 9/11 Public Portal Document /i / 2002 16:23 2124838895 CRG PAGE 12

Roof Clean-Un Application: This procedure utilizes wet methods and careful with asbestos containing material (ACM). hygiene protocol for cleaning roofs contaminated

I. The entire roof shall be considered the work area for entry/access determinations. All abatement will be performed by NYSDOL licensed contractors with NYC DEE certified workers. For non-gravel or stone covered roofs with localized accumulations of visible debris, the clean-up areas shall be specified ("specified area") by DEP.

For gravel/stone covered roof surfaces, the entire roof shall be included in the specified roof area for clean-up. The gravel/stone shall be taken to a clean-up staging area on the roof and washed. Water shall be collected, filtered, and discharged into the drain/sewer as applicable.

2. A changing area consisting of two adjacent step-off pads located on the roof inunediately adjoining the roof entr' nce/exit. This area shall consist of a clean pad and a change pad. The clean pad shall be adjacent to the building interior access way (or at the point of entry to the roof for exterior access). The change pad shall be .djacent to the contaminated roof areas. Each pad (change pad mil reinforced plastic on the roof/access way surface and and clean pad) shall consist of two layers of 10- shall be large enough to facilitate changing and decontamination as described herein. A minimum of 4' x 4' is recommend, be specific to the roof though the exact configuration will

3. Workers shall first step from the building interior (or exterior at the point of entry to the roof) directly onto the clean pad. On the clean pad, each worker shall be double suited with disposable coveralls, plastic booties, gloves, and head coverings. Rubber boots may be used instead of the plastic booties. The boots shall be wet wiped and HEFA vacuumed prior to leaving the roof. Each worker shall wear a minimum of a half-face air- purifying respirator equipped with HEPA cartridges.

4. All penetrations at the roof within 10 feet of the specified roof area wet methods/HEPA vacuum and sealed with 6-mil polyethylene included in the clean-up shall be cleaned by sheeting.. 5. Roof cleanup shall begin at the entrance/exit and proceed in a path working away from the entrance/exit Water shall be the primary engineering c ...ttrol to minimize the potential for fiber release. 6. Roof surfaces shall be wetted and :hers wet cleaned using wet wiping techniques with water, mops, rags, brushes, etc. HEPA vacuuming may also be used as alternative to or in combination with wet cleaning. 7. Throughout the procedure, all personnel entering or existing the roof deeontargination practices. Attention shall be paid to limiting unnecessary shall observe the personal material on the roof. These personal decontamination► walking on or disturbance of procedures shall be strictly adhered to, in order to minimize the potential for spreading contamination to the interior of the buildings. 8. Solid nonporous objects, such as metal patio furniture, plant potters, and plastic furniture cushions, shall be wet wiped with damp rags. Wooden objects such as decking shall be HEPA vacuumed, wet wiped, and lightly br .h ci with a bristle brush utilizing simultaneous misting and local HEPA exhaust. Woven materials shall either be disposed as ACM or bagged and removed ofdsite 1901. 1001. Potted plants with visual contamination for proper laundering in accordance with 29 CFR should be disposed as ACM waste unless the owner requests decontamination. Potted plants will be repeatedly runoff water (i.e. into ACM disposal bags or by using rags rinsed, and provisions shall be made to catch the and HEPA wet-vacuums). 9. After completion of the above, the specified area roof shall be carefully washed.

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05/03/02

NYC-WTC 000118427