Asbestos abatement technical specifications, 130 Cedar Street, July 2004

NYC 9/11 Public Portal Document

Asbestos Abatement Technical Specifications For 130 Cedar Street, New York, NY 10. Completely remove all bulk mastic using an approved mastic solvent in accordance with manufacturer's recommendation. Product application shall be in accordance with the manufacturer's instructions and the MSDS for the product. Do not allow the solvent to stand or to be absorbed by the sub-floor. Prevent the flow of solvent under walls or into other materials and areas by placing impermeable absorbent materials specified for use by the manufacturer that act as a preventive impermeable barrier against seepage of liquid and/or vapor into unwanted areas.

11. After the completion of mastic removal, the Contractor shall thoroughly wash and clean the floor to remove any residue or fumes of mastic remover in accordance with the manufacturer's guidelines. Place the waste in sealed drums dedicated to the disposal of floor tile mastic waste. No bulk mastic residue shall remain on the floor surface following removal and cleaning. It is not necessary to remove asphaltic stain from pores of concrete.

12. Spent mastic removal agents must be properly stored, categorized and disposed.

13. Upon completion of the floor mastic removal the floor shall be smooth and free from ridges and bumps.

14. Wet all ACM with an amended water solution. Equipment used should • be capable of providing a fine-sprayed mist, in order to reduce airborne fiber concentrations when the material is disturbed. Saturate the material to the substrate but do not allow excess water to accumulate in the work area. Keep all removed material wet until it can be containerized for disposal to prevent fiber release (no more than one (1) full bag of ACM may be on the floor of the work area at any time.

8.3 Removal of Thermal System Insulation: Pipes and Fittings Insulation utilizing DEP Attachment T for Glovebag Procedures Inside Tent Enclosure: 1. All proposed work areas and contiguous space(s) shall be regulated to allow only certified asbestos workers and authorized visitors.

2. The glovebag procedures inside a tent shall comply with 15 RCNY & 1-105, 1-106 (except 15 RCNY & 1-105 c(II) and 1-106 (h) 3). The glovebag shall not be shifted or moved from the initial location.

3. If there is a breach and/or visible emissions are detected outside the glovebag or tent, work shall cease. The source of the emissions shall be properly controlled and identified in the log. The dust resulting from the fugitive emissions shall be at a minimum HEPA-vacuumed, then wet-cleaned until all evidence thereof is removed. The integrity of the i glovebag/tent shall also be restored.

Prepared byJLC Environmental Consultants, Inc. Project No. 04-3271 Page 45

NYC-WTC 000125623