Invoice for asbestos sample analysis, 44 Wall Street

NYC 9/11 Public Portal Document

Page 3 of 4 AV 120

6 When floor tile and mastic removals are done alone and if machinery or mechanical !t methods are not used, in lieu of the plasticizing requirements of ICR 56-8. (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 mzi 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 to1zhe clearance air tests.

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

The floor tiles, mastic and tar based felt shall be removed by manual methods. Tnis power applicable variance does not allow for the use of a beadblaster,. etc. Any shall oe equippec operated tools that mist be used in removing the floor tiles/mastic Subpart 56 -7. 1 (j) . with HEPA filtered local•'exhaust ventilation, as required by water shall be uses tc Dry removals of ACM materials will not be allowed. Amended abatement process. thoroughly wet the asbestos containing materials during the immediately wrapped in two layers of six - Materials removed shall be containerized or tight prior to transport to the waste mil, fire retardant plastic sheeting and secured air cecontamination facility. minimum (settling/drying) Tne contractor shall observe, at a minimum, the following hours with no plasticizacier. ✓ periods - 4 hours for walls plasticized to four feet and 6 cleaning, walls and floor s '//hen walls are plasticized, in addition to visible or gross each multiple clean • :p snail be cleaned by HEPA vacuuming and wet wiping, during When walls are net stage as defined in Subpart 56-1 5.2(b,d,e) of this Code Rule. period shall suffice. plasticized, one thorough cleaning and one settling qualified indivicua , • After the minimum drying period has elapsed, an authorized and Design Engineer. Independent of the removal Contractor, (i.e. the .Project Monitor, Owner), shall determine if the Air Monitoring Techhician or other representative of the 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.

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

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