NYC 9/11 Public Portal Document
the Cleaning Contractor to reclean as necessary. If all areas are dust free, then the Project
Monitor will authorize final air sampling. Final inspections shall be documented using the
Cleaning Checklist.
Deliverables
The Project Monitor shall submit to EPA, upon request, copies of the field notebook pages
via e-mail, fax, or alternative agreed upon format.
15. Post Cleaning Air Sampling Procedures
a. Sampling shall not begin until a visual inspection confirms the absence of visible dust
and debris. Post cleaning air sampling shall be performed upon successful visual
inspection and completed within 24 hours. A successful visual inspection shall be an
inspection that verifies the absence of dust and debris.
b. All surfaces must be completely dry prior to the start of sampling.
c. Upon completion of the cleaning, air sampling will be conducted to verify attainment
ofthe clean-up criteria. Based on consultation with the resident or owner, aggressive
or modified aggressive air sampling will be conducted. Residents shall not be present
during aggressive air sampling.
i. Before beginning aggressive air sampling, a 1 horsepower electric leafblower
shall be used to direct exhaust air against walls, ceilings, floors and other
surfaces. This shall continue for at least five minutes per 1,000 square feet of
floor. When directing the exhaust, caution shall be taken to minimize
disturbance and potential damage to furnishings and personal belongings
ii. Residents shall not be present in their residence during aggressive air sampling
activities.
iii. Personal protective equipment including disposable clothing, gloves, and
respirators shall be worn during aggressive air sampling activities.
iv. HVAC systems shall be shut down or isolated locally during aggressive air
sampling.
V. Room and window air conditioners shall not be operated during aggressive air
sampling.
vi. Leaf blowers shall not be employed for modified aggressive air sampling.
vii. All other procedures are identical for aggressive and modified aggressive air
sampling, unless otherwise noted.
d. At least one 20-inch fan shall be placed in the center of each room sampled. One fan
per 10,000 cubic feet of room space shall be used. The fans shall be operated on slow
speed and pointed toward the ceiling. The fans shall run for at least 15 minutes prior
to the start of sampling. The fans shall operate continuously throughout sampling and
shall not be turned off until sampling is completed.
e. For studio apartments 3 air samples shall be collected. For 1-bedroom apartments
and above, 5 air samples shall be collected. Sampling equipment shall be placed in
living areas and away from obstructions. The sampling cassette must be placed on a
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