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.
c. 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 tripod, not taped to existing
surface and should be directed downward at a 45 degree angle.
d. Common spaces will be sampled without the use of forced air devices
(fans, leaf blowers etc). For small spaces, less than 160 square feet, 3
samples will be collected. For large spaces greater than 160 square feet
and less than 25,000 square feet 5 samples will be collected. For spaces
greater than 25,000 square feet, 1 sample will be collected for each 5,000
square feet. Sampling equipment shall be placed away from obstructions.
The sampling cassette must be placed on a tripod, not taped to existing
surfaces and directed downward at a 45 degree angle.
e. Air samples will be collected in accordance with the procedures specified
in NIOSH 7400 Method and analyzed by phased contrast microscopy
(PCM) followed by Asbestos Hazard Emergency Response Act (AHERA)
transmission electron microscopy (TEM). The flow rate for collection of
air samples shall be at least 10 liters per minute and no more than 15 liters
per minute. Air sampling cassettes need to be monitored to ensure that
cassettes are not clogging by monitoring flow rates. The minimum sample
volume required is 3600 liters. These air samples and copies of necessary
documentation shall be hand delivered daily to EMSL Laboratories at: 307
W. 38th St., New York, New York 212-290-0051.
f. Wipe samples will be collected at 10 percent of the residences where
sampling only has been requested, up to a maximum of 13 residences, as
instructed by EPA. This sampling will consist of the collection of 3 wipe
samples each for dioxin, total metals and mercury (Note: a separate wipe
sample is required for each parameter at each location). Metals and
mercury wipe samples will be collected in accordance with procedures
specified in HUD Appendix 13.1. Dioxin wipe samples will be collected
in accordance with the procedures specified in ASTMD 6661-01. Wipe
samples and copies of necessary documentation will be packed, sealed and
shipped daily by courier for next day delivery to Paradigm Analytical
Laboratories at: 2627 Northchase Parkway SE, Wilmington NC 28405.
g. 24-hour turn-around time shall be specified for the analysis of all samples
collected using the aggressive air sampling method. Standard turn-around
time shall be specified for analysis of modified aggressive air samples and
wipe samples.
h. The Monitoring Contractor will document all the necessary information
regarding sampling activities, fill out all field logs, data sheets, and chain-
of-custody forms. The Monitoring Contractor will use F2L for all sample
and chain-of-custody documentation. Samples must be labeled and
accompanied with completed chain-of-custody forms before shipping to
NYC-WTC 000163336
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NYC-WTC_000163336Source: NYC Law Department, mirrored locally