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NYC-WTC_000199742

Label derived from the City's folder field. The City does not supply document titles.NYC-WTC_000199742–000199748
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NYC 9/11 Public Portal Document

Jessica Leighton - RA_sitrep12-27.wpd Pa^3j

NYC / ER. (Dec 20) - Particulate Monitoring (TEOM PM 2.5)

o ParkRpw (Site 1) - 24-hr average concentration for this period was 14.08 ug/m\ o Chambers St./West St. (Site 2) - 24-hour average concentration for this period was 10.88 ug/m^. o Coast Guard Building - Battery Park (Site 3) - 24-hour average concentrations for this period was 9.55 ug/m^. o Wall Street - 24-hour average concentrations for this period was 9.46 ug/m\ o All readings below the National Ambient Air Quality Standard for PM2 5 (65 ug/m’).

NYC / ER (Dec 20) - Particulate Monitoring (TEOM PMio)

o Wall Street - 24-hour average concentrations for this period was 18.65 ug/m\ o All readings below the National Ambient Air Quality Standard for PMio (150 ug/m)).

NYC / ER (Dec 19) - Particulate Monitoring (Dataram)

o Particulate levels noted at three locations (Stations L, N, R) were below the OSHA TWA. 0 Instruments operated approximately 6 to b'A hours. o Station L values ranged from 0.1 to 305.8 ug/m’ with an average of 33.6 ug/m\ o Station N values ranged from 3.9 to 140.6 ug/m^ with an average of 22.3 ug/W. 0 Station R values ranged from 0.7 to 204.0 ug/m^ with an average of 25.7 ug/m<

NYC / ER (Dec 20) - Particulate Monitoring (Dataram)

o Particulate levels noted at three locations (Stations L, N, R) were below the OSHA TWA. 0 Instruments operated approximately 6 to 6/2 hours. o Station L values ranged from 0.0 to 153.8 ug/m’ with an average of 11.4 ug/m\ o Station N values ranged from 0.7 to 116.3 ug/m’ with an average of 8.0 ug/m\ o Station R values ranged from 1.6 to 118.5 ug/m’ with an average of 10.7 ug/m\

NYC / ER (Dec 21) - 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 1.9 to 117.0 ug/m’ with an average of 5.7 ug/mh o Station N values ranged from 0.8 to 208.9 ug/m^ with an average of 4.0 ug/mf o Station R values ranged from 2.4 to 57.4 ug/m’with an average of 5.4 ug/m\

CITY_21MC1OO_OO2458792

NYC-WTC_000199744

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NYC-WTC_000199744Source: NYC Law Department, mirrored locally

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