License agreement for facade cleanup, 205 Pearl Street, Sept 2002

NYC 9/11 Public Portal Document D. E. P. ENFORCEMENT Fax :718-595-8749 Sep 5 '02 16:42 P.10

Application: Tt is procedure utilizes wet methods and careful hygiene protocol for cleaning roofs contaminated with asbestos c i ,raining material (ACM).

1. The entire r:3of shall be considered the work area for entry/mess determinations. All abatement will be performed bb NYSDOL licensed contractors with NYC DEP certified workers.

For nongray-.l or stone covered roofs with localized accumulations of visible debris, the clean-up areas shall be specified (" iecified area") by DEP.

For gravel/st ne covered roof surfaces, the entire roof shall be included in the specified roof area for clean-up. The gravel/stione 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 rrea consisting of two adjacent step-off pads located on the roof immediately adjoining the roof entrance/exit This area shall consist of a clean pad and a change pad. The clean pad shall be adjacent to the building intex,:ior access way (or at the point of entry to the roof for exterior access). The change pad shall be adjacent to tt:.e contaminated roof areas. Each pad (change pad and clean pad) shall consist of two layers of 10. mil reinforced plastic on the roof/access way surface and shall be large enough to facilitate changing and decontamination as described herein. A minimum of 4' x 4' is recommend, though the exact configuration will be specific toithe roof.

3. Workers shat`' 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 had coverings. Rubber boots may be used instead of the plastic booties. The boots shall be wet wiped and HI A vacuumed prior to leaving the roof. Each worker shall wear a minimum of a half-face air- purifying resl`irator equipped with HEPA cartridges.

4. All penetratic.ns at the roof within 10 feet of the specified roof area included in the clean-up shall be cleaned by wet methods/7 A vacuum and sealed with 6-mil polyethylene sheeting.

5. Roof cleanur. shall begin at the entrance/exit and proceed in a path working away from the entrance/exit. Water shall b., the primary engineering control to minimize the potential for fiber release.

6. Roof surface.` shall be wetted and then wet cleaned using wet wiping techniques with water, mops, rags, brushes, etc. IEPA vacuuming may also be used as alternative to or in combination with wet cleaning.

7. Throughout he procedure, all personnel entering or existing the roof shall observe the personal decontamination practices. Attention shall be paid to limiting urmccessary walking on or disturbance of material on the roof. These personal decontamination procedures shall be strictly adhered to, in order to minimize the : ptential 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 d;tmp rags. Wooden objects such as decking shall be HEPA vacuumed, wet wiped, and lightly brushed with a bristle brush utilizing simultaneous misting and local HEPA exhaust. Woven materials shall either be disp~scd as ACM or bagged and removed off-site for proper laundering in accordance with 29 CPR 1901. 1001. Potted plants with visual contamination should be disposed as ACM waste unless the owner requests decortamination. Potted plants will be repeatedly rinsed, and provisions shall be made to catch the runoff water (.e. into ACM disposal bags or by using rags and HEPA wet-vacuums).

9. After complet on of the above, the specified area roof shall be carefully washed.

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NYC-WTC 000115107