Fax cover sheet from J.C. Broderick & Associates, Oct 2001

NYC 9/11 Public Portal Document

e. There is existing or potential water damage to asbestos containing material; f. The asbestos-containing material is more than one inch thick; and is used to cover ceilings, walls, beams, or other structural members; g. The asbestos-containing material is subject to high vibration.

ii. Encapsulation may be performed when: a. Damage to the material is improbable; b. The asbestos-containing material is granular or cementitious; c. The encapsulating material is known to bond asbestos to the subsurface and asbestos-containing material and also retains its bonding integrity; d. Asbestos-containing material has been removed and loose fibers remain which should be bonded.

iii. If encapsulation is used as a method of asbestos abatement the following maintenance procedures shall be employed: a. A periodic monitoring and maintenance program consisting of inspection at least annually to check for damage to all encapsulated surfaces; b. Maintenance of records by the building owner, on the locations and condition of the encapsulated material;

iv. Sealants considered for use in encapsulation shall first be tested to ensure that the sealant is adequate for its intended use. A section of the asbestos-containing materials shall be evaluated following this initial test application of the sealant to quantitatively determine the sealants effectiveness in terms of penetrating and hardening the asbestos-containing material, its toxicity, its flammability, its tolerance to disturbance or abuse, its solubility (dissolvability) in water, its effects on the acoustical properties of the asbestos-containing material, and its tolerance to top-covering paints. The United States Environmental Protection Agency, Office of Toxic Substances, has developed guidelines for the use of encapsulants on asbestos-containing materials which discuss advantages and disadvantages of encapsulation. The American Society of Testing and Materials (ASTM) Committee E06.221.06E on Encapsulation of Building Materials has developed a guidance document to assist in the selection of an encapsulant once a decision to encapsulate has been made. When a choice of an encapsulant has been made, written justification of this choice (based on the characteristics of the encapsulant, the asbestos-containing material to be encapsulated, and the substrate surface underneath the asbestos-containing material) shall be included in the job specifications, and a copy of this justification shall be available for review at the job site.

v. Before encapsulation is performed, all loose and hanging asbestos-containing material shall be removed while damp, and disposed of in accordance with Federal, State and Local guidelines.

NYC-WTC 000104871