EPA environmental monitoring summary, Oct 19 2001

NYC 9/11 Public Portal Document

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Landfill.

Wipe Samples: PCBs - The results of seven samples collected inside of Public School 234 on September 29 showed no detectable levels of PCBs.

Ambient Air Sampling: Metals - The results of 20 samples collected on October 8 and October 11 showed either no detectable levels of metals, or were below applicable EPA action levels, OSHA permissible exposure levels and the National Ambient Air Quality Standards for lead.

PCBs - Trace amounts of PCBs were detected in four of the 10 samples collected on October 8, but all were well below levels of concern. Six samples showed no detectable levels of any PCBs. All levels were below EPA action levels.

Silicates - Twenty samples collected on October 2 showed no detectable levels of silicates.

PM 2.5 - Monitoring for fine particulate matter (particles less than 2.5 micrometers in diameter) was conducted on October 17 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 (65 ug/m3) for all stations.

VOCs - Sampling for volatile organic compounds (VOCs) was conducted on October 18 in the plume in the debris pile. Benzene exceeded the OSHA time weighted average of 1 parts per million (ppm) at one location in the pile at ground level. Overall VOC levels in the debris pile improved significantly from previous results.

Particulate Monitoring - Samples collected using portable monitors on October 18 at Locations L (North side of Stuyvesant High School near North Park), N (south side of Pier 25), and R (TAGA bus location) showed no significant readings.

Direct Readings - On October 18 there was an overall increase in carbon monoxide readings taken throughout the monitoring area in lower Manhattan. Several readings noted in early afternoon at Locations B (SE corner of Church & Dey), 2 (Greenwich & Liberty), Cl (SW corner of Broadway & Liberty), H (south side of Chase Plaza at Pine Street), D (East end of Albany at Greenwich) and K (West & Albany) were above the National Ambient Air Quality Standard 8-hour average of 9 ppm, but were below the NAAQS 1-hour standard of 33 ppm and the OSHA permissible exposure level of 50 ppm.

Previous Daily Environmental Monitoring Summaries:

October 17 & 18,2001 October 16, 2001 October 15. 2001 October 14, 2001 October 13, 2001 October 12, 2001 October 11, 2001 October 10, 2001 October 9, 2001 October 8, 2001 October 7, 2001 October 6,2001 October 5. 2001

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