NYC-WTC_000187461

NYC 9/11 Public Portal Document

o All readings below the National Ambient Air Quality Standard for PMj 5 (65 ug/m’).

NYC / ER (Jan 9) - Particulate Monitoring (TEOM PM,o)

o Wall Street - 24-hour average concentrations for this period was 23.56 ug/m^. o All readings below the National Ambient Air Quality Standard for PM,,, (150 ug/m’).

NYC / ER (Jan 10) - Particulate Monitoring (TEOM PM,,) o Park Row (Site 1) - 24-hr average concentration for this period was 18.49 ug/nt^. o Chambers St./West St. (Site 2) - 24-hour average concentration for this period was 18.97 ug/nr’. o Wall Street - 24-hour average concentrations for this period was 18.62 ug/m\ o All readings below the National Ambient Air Quality Standard for PM, , (65 ug/mQ. NYC / ER (Jan 10) - Particulate Monitoring (TEOM PM,o)

o Wall Street - 24-hour average concentrations for this period was 28.54 ug/m’. o All readings below the National Ambient Air Quality Standard for PM,,, (150 ug/m’). NYC / ER (Dec 1) - Particulate Monitoring (PM,„ filter) o Park Row (Site 1) - 24-hr average concentration for this period was 37.06 ug/m^. o Chambers St./West St. (Site 2) - No data reported. o Coast Guard Building - Battery Park (Site 3) - 24-hour average concentration for this period was 19.8 ug/m\ o Canal Street Post Office (Site 4) - 24-hour average concentration for this period was 24.0 ug/m’. o P.S. 274 - 800 Bushwick Avenue. Brooklyn (Site 7) - 24-hour average concentration for this period was 22.71 ug/m’. o All readings below the National Ambient Air Quality Standard for PM,o (150 ug/m').

NYC / ER (Dec 2) - Particulate Monitoring (PM,„ filter) o Park Row (Site 1) - 24-hr average concentration for this period was 28.87 ug/m^. o Chambers St./West St. (Site 2) - 24-hr average concentration for this period was 24.38 ug/m’. o Coast Guard Building - Battery Park (Site 3) - 24-hour average concentration for this period was 19.5 ug/m’. o Canal Street Post Office (Site 4) - 24-hour average concentration for this period was 21.4 ug/m’. o P.S. 274 - 800 Bushwick Avenue. Brooklyn (Site 7) - 24-hour average concentration for this period was 20.47 ug/m^. o All readings below the National Ambient Air Quality Standard for PM,, (150 ug/m’).

NYC / ER (Dec 3) - Particulate Monitoring (PM,„ filter) o Park Row (Site 1) - 24-hr average concentration for this period was 44.80 ug/m^. o Chambers St./West St. (Site 2) - 24-hour average concentration for this period was 40.39 ug/nt^. o Coast Guard Building - Battery Park (Site 3) - 24-hour average concentration for this period was 39.4 ug/m^.

CITY_21MC100_002417046

NYC-WTC_000187464