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 Contractor shall be required to apply and receive approval for r~ variances from the following NYCDEP Asbestos Control Program regulations at a minimum to perform work in compliance with applicable regulations: Sections 1-116(m), 1- 117(a), 1-118(a), 1-126(C).

9.0 General Cleaning Procedures

9.1 Visible accumulations of loose ACM shall be cleaned up as many times as deemed necessary to prevent more than one bag of ACM to accumulate at any time. This material shall be misted until such time as it can be properly cleaned. At the end of each workday care shall be taken that no asbestos containing debris is left overnight in the work area. Materials shall be containerized using non-metallic dustpans or squeegees. HEPA vacuums shall also be utilized to dean debris. Metal shovels shall not be used in the work area to pick up or move accumulated waste material.

9.2 Visible accumulations of dust shall be cleaned of all surfaces in the work area on a daily basis. Wet wiping and/or HEPA vacuuming shall be used for this type of cleaning. The worker DES surfaces shall be cleaned according to this method each day, as appropriate, after each shift change and meal break.

9.3 Excess water accumulation shall be avoided to prevent flooding of the work area. If flooding occurs all work shall stop until the water is collected and

• disposed of properly.

10.0 Final Cleaning Procedures

10.1 Prior to commencement of final air clearance testing, these additional cleaning precautions shall be undertaken to insure the area is ready for clearance testing.

a) After removal of all visible accumulations of ACM, HEPA vacuuming shall be performed on all surfaces. To pick up excess water and gross saturated debris a wet-dry shop HEPA vacuum dedicated to asbestos abatement may be used.

b) All surfaces shall be wet wiped at least once.

c) Upon completion of HEPA vacuum wet wiping, the cleaned layer of surface barriers may be removed. Isolation barriers shall remain in place throughout this operation.

d) The Contractor shall vacate the area and wait a minimum of twelve (12) hours for airborne fibers to settle. At this point, all surfaces shall be cleaned again using wet methods and HEPA vacuums. When this is complete, the remaining plastic barriers shall be removed while the isolation barriers remain in position.

Prepared by JLC Environmental Consultants, Inc. Project No. 04-3271 Page 55

NYC-WTC 000125633