NYC-WTC_000199751

NYC 9/11 Public Portal Document

j Jessica Leighton - RA_sitrep01-07.wpd Pages

average concentrations.

Ambient Air Sampling Locations

NYC / ER (Dec 29 - Jan 2,2002) - Asbestos Monitoring (Particulate Monitoring Stations)

o Monitoring sites include: PmJcRow (Site 1) Chambers St./West St. (Site 2) 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 35 samples were collected from these monitoring sites. o All of the samples were below the TEM AHERA standard.

NYC / ER (Jan 4) - Particulate Monitoring (Dataram)

o Particulate levels noted at three locations (Stations L, N, R) were below the OSHA TWA. o Instruments operated approximately 616 hours. o Station L values ranged from 0.2 to 203.4 ug/m^ with an average of 14.3 ug/m\ o Station N values ranged from 0.0 to 77.6 ug/m’with an average of 10.6 ug/m\ o Station R values ranged from 0.1 to 85.4 ug/m’withan average of 13.3 ug/m\

NYC / ER (Jan 5) - Particulate Monitoring (Dataram)

o Particulate levels noted at three locations (Stations L, N, R) were below the OSHA TWA. o Instruments operated approximately 6 hours. o Station L values ranged from 11.6 to 155.4 ug/m’with an average of28.1 ug/m\ o Station N values ranged from 19.8 to 61.3 ug/nE with an average of 24.6 ug/m\ o Station R values ranged from 3.2 to 59.1 ug/m^withan average of 26.1 ug/m\

NYC / ER (Jan 6) - Particulate Monitoring (Dataram)

CITY_21MC100_002458803

NYC-WTC_000199753