NYC 9/11 Public Portal Document
g- 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 ofair 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 sampling volume
required is 3600 liters. All clearance air samples and copies ofnecessary documentation
shall be hand delivered daily to EMSL Laboratories at: 307 W. 38* St., New York, New
York 212-290-0051.
h. 24-hour turn-around time shall be specified for the analysis ofall post-cleaning air samples
for Scope B cleanups and for all samples collected using the aggressive air sampling
method. Standard tum-around time shall be specified the analysis ofair samples collected
for Scope A cleanups using the modified aggressive air sampling method.
i. The Monitoring Contractor shall document all the necessary information regarding sampling
activities, fill out all field logs, data sheets, and chain-of-custody forms. The Monitoring
Contractor shall 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 the designated laboratory. The label must include the EPA Project Tracking Number.
j- 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) will be provided to EPA, via the website, within 24 hours of
completion of evaluation. All data shall be maintained as confidential.
Deliverables
The Project Monitor shall record all post-cleaning information in the EPA Indoor Air database or
an agreed upon electronic format. This information shall include, but is not limited to sampling
technique (aggressive or modified aggressive), visually cleaned (Y/N), damage claim (Y/N), and
post cleaning status (pass/fail). Dates and times shall be associated with all activities including start
and finish date.
Additional information including but not limited to, absence ofdust/debris, equipment used (leaf
blower, fan etc.), size ofspace, start and completion dates for the cleaning, sample media, flow
rates (start/final, flow rate (average), time (start/finish), total elapsed time (min), calculated sample
volume (L), pump fault, weather, units, QC samples (lot blank), sampling dates, sample IDs,
complete chain-of-custody forms, EPA Project Tracking Numbers and laboratory name shall be
entered into an agreed upon electronic format or website approved by EPA within 24 hours of
activity. Dates and times shall be associated with all activities including start and finish date.
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NYC-WTC_000140638
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