Air quality particulate matter guidance, NYC, Oct 2001

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o o ****J)J{/ip'J'**** co i 1^ ■a o DRAFT (October 17, 2001, 2 p.m.) ATSDR, CDC, EPA, OSHA Environmental Assessment Workgroup PM Action c o CT o Levels for World Trade Center Response o' cn ■D Ca3 o ro Thoracic Particulate General Public/Recommendations Comments 3. o cn Respirable Particulate 03 24 hour PMjo 24 hour PM2.5 Ambient Action Level (pg/m’) o o Ambient Action Level (^xg/m^) o c 3 0-40 0-155 • No restriction • Air quality is good to moderate. CD Z3

>40-56 >155-255 • People with respiratory or heart disease, the elderly and children, should • Air quality is unhealthy for sensitive groups. limit prolonged exertion.

>65-150 >255-355 • People with respiratory or heart disease, the elderly and children, should • Air quality is unhealthy for all persons. avoid prolonged exertion; everyone else should limit prolonged exertion. • Sensitive groups may experience more serious health effects.

>150-250 >355-425 • People with respiratory or heart disease, the elderly and children, should • Air quality is very unhealthy for all persons. avoid any outdoor activity; everyone else should avoid prolonged exertion. • Everyone may experience more serious health effects.

>250 >425 • Everyone should avoid any outdoor exertion; people with respiratory or • Air quality is hazardous for all persons. heart disease, the elderly and children, should remain indoors. • The entire population is more likely to be affected.

Inhalable Particulate General Public/Recommendations Comments 24 hour TSP Screening Level (pg/m’)

230 • Further characterization of particulate is warranted. • Based on NY State Ambient Air Quality • Dust suppression procedures may be warranted. Standard. • Respiratory protection while in the area may be warranted. • Screening level for the general public that requires further evaluation.

1. Developed from EPA Air Quality Index at: http://www.e3ja.g®v/airnow/puJ)lications.html and the NY State at:

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