Data submission and personal air monitoring protocols for WTC project,

NYC 9/11 Public Portal Document

horsepower electric leaf blower) shall be used to direct exhaust air against walls, ceilings, floors and other surfaces. When directing the exhaust, caution shall be taken to minimize disturbance and potential damage to furnishings and personal belongings. ii. For modified aggressive air sampling forced air equipment shall not be employed. iii. All other procedures are identical for aggressive and modified aggressivc air sampling. b. One 20-inch fan shall be installed per 10,000 c^c feet of room ace and run at low speed. The fan shall operate continuously thr^^^ut sampling a shall not be turned off until sampling is completed. c. For studio apartments 3 samples shall be| Ilected. Bpri-bedroom ap .'BLS ;ind above 5 samples shall be collected. Sani ing equipment shall be pla. n living areas and away from obstructions. The sa| jling cassette must be place a tripod and not taped to existing surfaces. d. Common spaces will be sampled withoii I the use (if forced air devices (fans, leaf blowers etc). For small spaces, less thaw 60 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 ec^pfnent shall be placed away from obstructions. The sampling c^sette must he placed on a tripod directed downward at a 45 degree angle and not taped to exist ing surfaces. e. Air samples shall be collected in accordance with the procedures specified in NIOSH 7400 Method for P( W and 74{>2 for TEM. Air sampling cassettes need to be monitored to ensure numns are not clogging by monitoring flow rates, the minimum . sample volume required is 3600 liters. f. W ipe samples will be collected at 10 percent of the residences where sampling has been requested, up to maximum of 50 units, as instructed by EPA. JWipBsamples will be collected for dioxin, total metals and mercury (Note: a 'Ml.'

separate sample is required for each parameter). All wipe samples will be collected in accordance with procedures specified in HUD Appendix 13,1. g. The confracto ’(all document ail the necessary information regarding sampling activities, EH Mil field logs, data sheets, and chain-of-custody forms. The / contractor sha! !e F2L for all sample and chain-of-custody documentation. Samples must be labeled and accompanied with completed chain of custody forms before shippinMO the designated laboratory. The label must include the EPA Project Trac^f Number. Samples will be packed, sealed and shipped to EPA Contract Laboratory for analysis. All information must be maintained using the secure EPA website(url, user name and password to be provided by EPA). Dates for monitoring and/or cleaning shall be provided to EPA electronically in an EPA approved format within 24 hours. Information on sampling activities (date, sample ID) shall be provided to EPA, via the website, within 24 hours of completion of sampling.

Deliverables

NYC-WTC_000140378