Invoice for asbestos sample analysis, 44 Wall Street

NYC 9/11 Public Portal Document

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6 When floor tile and mastic removals are done alone and if machinery or mechanical methods are not used, in lieu of the plasticizing requirements of ICR 56-8. l (k)15) . the following alternatives shall be used in the removal areas.

✓ The walls of the work area shall be. plasticized with two (2) layers of six -mIi fire retardant plastic sheeting up to a height of four feet, or

✓ The walls of the work area shall not be plasticized during the removal worx. However; the walls s.hall be wet cleaned ,or HEPA vacuumed prior tojthe clearance air tests.

or manual removals of floor tile and mastic, negative air shall be established v' :tnin with the walls piast,c.zec the abatement work areas at four (4) air changes per hour no plasticization. ,-)p to four feet and six (6) air changes per hour with

The floor tiles, mastic and tar based felt shall be removed by manual methods. Tnis applicable variance does not allow for the use of a beadblaster„ etc. Any power equiLpec operated tools that must be used in removing the floor tiles/mastic shall oe Subpart 56 -7. 1 (j) . with HEPA filtered local••exhaust ventilation, as required by water shall be usea to Dry removals of ACM materials will not be allowed. Amended process. thoroughly wet the asbestos containing materials during the abatement immediately wrapped in two layers of six - Materials removed shall be containerized or waste transport to the mil, fire retardant plastic sheeting and secured air tight prior to cecontamination facility. following minimum (settling/drying) Tne contractor shall observe, at a minimum, the periods - 4 hours for walls plasticized to four feet and 6 hours with no plasticizacien.

,-/hen walls are plasticized, in addition to visible or gross cleaning, walls and floor s each multiple clean snail be cleaned by HEPA vacuuming and wet wiping, during Rule. When walls are nc' stage as defined in Subpart 56-15.2(b,d,e) of this Code period shall suffice. iasticized, one thorough cleaning and one settling qualified ndivio a , After the minimum drying period has elapsed, an authorized and Independent of the removal Contractor, (i.e. the .Project Monitor, Design Engineer. shall determine if the Air Monitoring Techhician or other representative of the Owner), area is dry, and area is dry and acceptable for clearance air sampling. If the acceptable for clearance air sampling clearance air sampling shall commence.

shall apply. 2 if the air test results are unacceptable, the provisions of 56-17.9

NYC-WTC 000094959