NYC-WTC_000199749

NYC 9/11 Public Portal Document

I Jessica-Leighton - RA_sitrepO1-O8.wpd Page 2

o Note: The results for Location W-11 indicate a total of 4 structures. There were 2 structures identified for each size classification. One of the structures was chrysotile, the other was amosite.

Fresh Kills (Jan 6) - Particulate Monitoring (Dataram)

o Nothing of significance reported at three stations (P-2, P-6, and P-8) based on daily average concentrations.

Ambient Air Sampling Locations

NYC / ER (Jan 7) - Particulate Monitoring (Dataram)

o Particulate monitoring at three locations (Stations L, N, R) was not conducted due to weather conditions.

NYC / ER (Jan 7) - Volatile Organics (Mobile Laboratory)

o Benzene exceeded OSHA TWA PEL (1 ppm) at one location (North Tower) in the debris area at ground level. o All 3 of the other samples (Washing Tent, Austin Tobin Plaza, and South Tower) did not note any benzene above the detection limit (20 ppbv). o 1,3-Butadiene exceeded OSHA PEL (1 ppm) at one location (North Tower) on the debris pile in the plume at ground level. o All 3 of the other samples did not note any 1,3-Butadiene above the detection limit (20 ppbv).

Direct Reading Instruments

NYC / ER (Jan 7)

o Nothing of significance reported in the limited monitoring conducted. o Monitoring impacted by weather conditions.

CITY_21MC100_002458798

NYC-WTC_000199750