Daily environmental monitoring summary, Oct 17-18 2001

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Borough of Manhattan Community College and the U.S. Coast Guard building, located in Battery Park. All 24-hour average values were below the National Ambient Air Quality Standards (65 ug/m3) for all stations.

PM 10 - Monitoring for fine particulate matter (particles less than 10 micrometers in

9 diameter) was conducted from October 2 to October 8 at Pace University, the Borough of Manhattan Community College and the U.S. Coast Guard building, located in Battery Park. All 24-hour average values were below the National Ambient Air Quality Standards (150 ug/m3) for all stations.

w Ute Monitoring for PM 10 was conducted from October 3 through October 8 at P.S. 274 in Brooklyn and from October 4 to October 7 at the Canal Street Post Office. All 24-hour average values were below the National Ambient Air Quality Standards (150 ug/m3) for all stations.

VOCs - Sampling for volatile organic compounds (VOCs) was conducted on October 16 in the plume in the debris pile. Benzene exceeded the OSHA time-weighted average permissible level (1 part per million) at two locations in the pile at ground level. (Note: In a previous Daily Summary EPA identified benzene's permissible level as 0.5 ppm.) This concentration of .05 ppm represents an OSHA s I action level used to trigger certain monitoring requirements.

Particulate Monitoring - EPA collected samples using portable monitors at the following locations where EPA has fixed air montiors: on October 16 at Locations M1 (West Street south of Harrison) and N (south side of Pier 25), and on October 17 at Locations L (North side of Stuyvesant HS near North Park), N (south side of Pier 25) and R (TAGA bus location). No significant readings were found.

Latest Available Daily Environmental Monitoring Summary

Resources on the World Wide Web:

US Department of Labor's Occupational Safety and Health Administration ■ New York Citv Department of Health WBHHHa US Department of Health and Human Services New York State Emergency Management Office WflBIMM

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