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EPA Region 2 health effects screening criteria for ambient air

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Draft document outlining health effects screening criteria for ambient air developed by EPA Region 2 in October 2002.

NYC-WTC_000186132–000186137
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NYC 9/11 Public Portal Document

6. EPA - HEH (noncarcinogen) > Hazard Quotient (HQ) = 10

7. National Ambient Air Quality Standard (NAAQS) - Lead is a 3 month average - I’M2 5 is a 24 hour average - Sulfur Dioxide is a 24 hour average primary standard

8. Air Quality Index (AQI)

9. Non cancer effects based on CAL-EPA toxicity studies

10. American Conference of Governmental Industrial Hygienists (ACGIH) Threshold Limit Value (TLV)

11. Agency for Toxic Substances and Disease Registry (ATSDR) Inhalation minimum risk level (MRL) X 10

12. ATSDR acute MRL

13. Lower Explosive Limit (2-11 %)

14. National Institute of Occupational Safety and Health (NIOSH)

15. Proposed Reference Concentration (RfC) - HEH (noncancer) > Hazard Quotient (HQ) = 10

16. Based on Benzo(a)pyrene toxicity equivalency factor toxicity equivalency factor (TEF)

17. EPA National Center for Environmental Assessment (NCEA) provisional inhalation Slope Factor (3.1 E 00 mg/kg/day ')

DRAl-T-DO NOT QUOTE OR C/TE A-6 October 2002

CITY_21MC100_011109164

NYC-WTC_000186137

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NYC-WTC_000186137Source: NYC Law Department, mirrored locally

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WTC health criteria appendix, Dec 2001

NYC-WTC_000176140

Appendix document outlining health protective screening values and contaminants of concern for WTC site workers and Lower Manhattan residents.

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