NYC-WTC_000199737

NYC 9/11 Public Portal Document

Fresh Kills (Nov 26) - Particulate Monitoring (Dataram ) o Nothing of significance reported at five stations based on daily average concentrations.

Ambient Air Sampling Locations

NYC / ER (Nov 18) - Asbestos Monitoring (Particulate Monitoring Stations)

o Monitoring sites include: Pace University (Site 1) Manhattan Boro Community College (Site 2) Coast Guard Building: Battery Park (Site 3) Public School 154: 333 East 135**' St. Bronx (Site 5) Intermediate School 143: 511 West 182"*' St., Manhattan (Site 6) Public School 274: 800 Bushwick Ave.. Brooklyn (Site 7) Public School 44: 80 Maple Parkway. Staten Island (Site 8) Public School 199: 3290 - 48“* Ave.. Queens (Site 9) o During this period a total of 8 samples were collected from these monitoring sites. o All of the samples were below the TEM AHERA standard.

NYC / ER (Nov 26) - Particulate Monitoring (Dataram)

o Particulate levels noted at thr ee locations (Stations L, N, R) were below the OSHA TWA. o Instruments operated approximately 7.5 hours o Station L values ranged from 17.0 to 147.9 ug/m ’ with an average of 58.9 ug/m\ o Station N values ranged from 0.0 to 135.9 ug/m^ with an average of 42.2 ug/m\ o Station R values ranged from 70.6 to 253.7 ug/m" with an average of 128.8 ug/m^

NYC / ER (Nov 21) - Volatile Organics (Mobile Laboratory )

o Benzene did not exceeded OSHA TW A PEL (1 ppm) at any location.

NYC / ER (Nov 26) - Volatile Organics (Mobile Laboratory ) o Benzene exceeded OSHA TW A PEL (1 ppm) at one location (North Tower) on the debris pile in the plume at ground level. o Benzene did not exceeded OSHA TW A PEL (1 ppm) at the South Tower location. o 2 other samples (Wash Tent and Austin Tobin Plaza) did not note any benzene above the detection limit (20 ppbv).

Direct Reading Instruments NYC / ER (Nov 26) o Nothing of significance reported.

CITY_21MC100_002458771

NYC-WTC_000199738