Final notice letter, Sept 2002

NYC 9/11 Public Portal Document 10/31/02 18:48 FAX 318 488 4982 YL REALTY igjo12 :“ ocT-23-2882 i443 NYCDEP BANHM ASBYLEAD TRU 749 505 3648 9=P.11 Building Facade Clean-ap Work shall be performed by a NYSDOL licensed asbestos contractor with NYCDEP and NYSDOL asbestos certified workers. The contractor performing the cleaning sbould be experienced in cleaning building facades. The clean up nrea shal] be specified (“specified area”) by DEP. The area below the fagade cleaning shal] be covered with a layer of polyethylene sheeting. All debris must be collected for disposal as ACM directly upon removal from the surface. (i.e. All waste must be double bagged in ACM waste labeled bags.) Running water or water munoff on the building fagade is not permitted. Building oecupants shall be notified prior te the fagade cleaning. Access to the street below the facade cleaning shall be restricted and marked with caution tape. Cleaning shall not be performed during wind speeds greater than 20 mph. All HVAC systems and air conditioners shall be turned off. All windows shal] be closed during the cleaning of the building, Some air conditioners and windows may require sealing with duct tape to prevent water penetration. ae & Bqare completed prior to rigging equipment from the roof. All horizontal surfaces and ail windows on the facade shall be cleaned of large bulk material by wetting and hand brushing or scraping with non-metallic bristle brushes or non-metallic scrapers, by wet wiping and/ or by HEPA vacuuming from top to bottere. Only water shall be used for wet wiping and low- pressure washing. Detergents, solvents, additives, and any other chemical cleaning agents are prohibited. The removed material shall be immediately placed ito containers (e.g. bags). Windows shall be wet wiped, Free running water shall not be evident during this procedure. Power for HEPA vacuums shal! be supplied through ground fault mterrupters. After completion of debris removal, the specified area shall be carefully washed. A low pressure washing technique, moving from top to bottom, shall be employed to minimize water bounce-back. Facades shall ve washed with a low-prassure wash not te exceed 250 psi. Ail clean-up activities on the roof must be At the completion of work, a visual inspection of the sbated surfaces and sidewalk shall be performed to verify the absence of visible debris. Air monitoring shall be performed by an independent NYSDOL licensed third party air monitoring firm with certified workers. In order to minimize disruption to the public and to the building occupants, it is recommended this work be performed during off-hours. Page 5 05/03/02 NYC-WTC_000134065