License agreement for exterior cleanup, 60 Broad Street, 2002

NYC 9/11 Public Portal Document

d31 0/1a12 16:23 2124838895 CRG PAGE 12

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

1. The entire roof shall be considered the work area for entry/access performed by NYSDOL licensed determinations. All abatement AiIl be contractors with NYC ,DEP certified workers. For no! gravel or stone covered roofs with localized accumulations of visible specified ("specified area") by DE?. debris, the clean-up areas shall be

For gravel/stone covered roof surfaces, the entire roof shall be included in The gravel/stone shall be to en to a the specified roof area for clean-up. filtered, and discharged into the clean-up staging area on the roof and washed. Water shall be collected, drain/sewer as applicable. 2. A changing area Consisting of two adjacent step-off pads located entrPlce/exit. This area shall consist of a clean on the roof immediately adjoining the roof bu!7ding interior access way (or at pad and a change pad. The clean pad the point of entry to the roof for shall be adjacent to the djacent to the contaminated roof areas. exterior access). The change pad shall be mil reinforced plastic on the Each pad (change pad and clean pad) shall roof/access way surface and shall be large consist of two layers of 10- decontamination as described herein. A minimum of enough to facilitate changing and be specific to the roof 4' x 4' is recommend, though the exact configuration will 3. Workers shall first step from the building interior (or exterior at the clean pad. On the clean pad, point of entry to the roof) directly onto the each worker shall be double suited gloves, and head coverings Rubber with disposable coveralls, plastic booties, boots may be used instead of the plastic wiped and HEPA vacuumed prior to booties. The boots shall be wet Ieaving the roof. Each worker shall wear purifying respirator equipped with HEPA a minimum of a half face air- cartridges. 4. All penetrations at the roof within 10 feet of the specified roof area wet methods/1-MPA vacuum and included i+ri the clean-up shall be cleaned by sealed with 6-mil polyethylene sheeting. S. Roof cleanup shall begin at the entrance/exit and proceed in a Water shall be the primary engineering path working away from the entrance/exit. ct;-ttrol to minimize the potential for fiber release. 6. Roof surfaces shall be wetted and .her wet cleaned using wet brushes, etc. HEPA vacuuming may also wiping techniques with water, mops, rags, be used as alternative to or in combination with wet cleaning. 7. Throughout the procedure, all personnel entering or decontamination practices. Attention shall be existing the roof shall observe the paid to persona] material an the roof. These personal limiting unnecessary walking on or disturbance of minimize the potential for spreading decontamination procedures shall be strictly adhered contamination to the interior of the buildings. to, in order to 8. Solid nonporous objects, such as metal patio f'.urtirw'e, plant wiped with damp rags. Wooden objects such as potters, and plastic furniture e br; ]r~ cl with a bristle brush decking shall be HEPA vacuumed, wet utilizing simultaneous misting and local w-i'ped,shall and blight y 'tither be disposed as ACM or HEPA exhaust. Woven materials shall bagged and 1901. 1001. Potted plants with visual removed off-site for proper laundering in accordance with 29 CFR requests decontamination, contamination should be disposed as ACM bagsts will be waste unless the owner runoff water (i.e. ACM disposal an rinsed, and provisions shall be m ade to catch the or by using rags HEPA wet-vacuums). 9. After completion of the above, the specified area roof shall be carefully washed_

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NYC-WTC 000118394