NYC-WTC_000234677

NYC 9/11 Public Portal Document

ATTACHMENT 2

WTC Indoor Air Monitoring - Sampling and AnalytiCc Media Sampling Points Analytical Sampling Method Proposed Sampling Vulnerability/Practicality Parameters

Settled Carpets, fabric furniture or Asbestos ASTM D 5755-95 This is a micro vacuuming method. Three collocated sampi Dust drapery in areas of activity collected from each location. Porous (living rooms, family Soft rooms) surfaces Lead ASTM E 1973-99 This is a micro vacuuming method. Three collocated sampi collected from each location.

Settled Horizontal surfaces of Asbestos ASTM D 6480-99 Wipe Samples Dust Non- tables or counters and bare porous floors, ceilings and walls in Hard areas of activity (living surfaces rooms, family rooms) Lead ASTM E 1 728 Wipe Samples

Dioxins ASTM D 6661-01 Wipe Samples

PAHs ASTM D 6661-01 Wipe Samples

Silica ASTM E 1 728** Wipe Samples

MMVF ASTM D 6480-99 Samples will be combined with the asbestos samplin

Indoor Air Areas of known activity Asbestos NIOSH 7400 Air pump operated at 10L/min for 8 hours to achieve the (living rooms, family wkgroup detection limits rooms) Lead NIOSH 7300 Air pump operated at 10L/min for 8 hours to achieve the wkgroup detection limits PAHs TBD Pending sample volume Pilot clean-up study only requirements and to account for break through on the cassettes.

Dioxins TBD Pending sample volume Pilot clean-up study only. Availability of sample cassettes f( requirements and to account for analysis is questionable. Apparently the supply is Io break through on the cassettes.

Silica NIOSH 7500 Air pump operated at 2.5L/min for 8 hours to achieve the wkgroup detection limits MMVF NIOSH 7400 Assumed that it behaves the same as asbestos, samples combined with the asbestos sampling.

NOTE: All samples (cassettes and wipes) will be preweighed by the laboratory or supplier prior to sample collection. After sample collection and upon receipt of tf sample wipe or cassette prior to performing the analysis. This may change depending upon the availability of preweighed materials. May collect samples 1

** Silica will be collected as a dust samples as is Lead. This was decided since pulverized silica would be particulate like and not fiber like as with asbestos and k

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NYC-WTC_000234683