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Air monitoring report, 345 South End Avenue, Dec 2001

Machine-extracted title · confidence 95%

Air monitoring report for 345 South End Avenue buildings conducted in December 2001 showing TEM results.

NYC-WTC_000121138–000121182

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: Parking Garage

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NYC 9/11 Public Portal Document

1

ENVIRONMENTAL INCORPORA TED The Fist Choice for Env ironmentul Testing & Consulting November 30. 2001

Gateway Plaza Management Corporation 375 South End Avenue New York, New York 10280

Subject: Random Air Sampling-Ambient Air Monitoring Gateway Plaza Buildings Sampling Date Si: November 19. 20. 21 . 26, 27, & 28

Gentlemen:

Please find enclosed the air monitoring report performed at the above referenced address in the 100, 200, 300, 400 & 500 Air sampling was conducted via Transmission Electron Microscopy iT'EMl analysis at the request of the owner

ATC Associates (FLAP #10879) analyzed the samples using the Transmission Electron Microscopy (TLM) Methodology. The results indicated that the areas achieved the acceptance criteria below <70 structures per mm2 set by the federal regulations. (Please See Attached TEM Report) According to the EPA, "In evaluating data from the World Truthe ('enter and the surroundtni; areas. 1-PA is using a protective standard under AHERA. the Asbestos Hazard Emergence Response .'let, to evaluate the risk from asbestos in the outdoor and indoor air This is a very' stringent standard that is used to determine whether children may re-enter a school building alter asbestos has been removed or abated It vs based on assumptions of long-terns exposure. EPA has chosen to use this standard, because it is the most stringent and protective, even though it o unlikely that the public will he exposed to asbestos from the World Trade Center site for extended periods of time.

To determine asbestos levels, air filters are collected from monitoring equipment through which air in the school building has passed and viewed through a microscope. The number of structures - material that has asbestos fibers on or in it - is then counted. The measurements must be 70 or fewer structures per square millimeter before children are allowed inside.

There is also a federal standard for asbestos exposure under OSHA, the Occupational Safety and Health Act, which is used to protect workers on-the-job. The standard is . l fiber per cubic centimeter averaged over an eight-hour day. To be as protective as possible, EPA is using the school re-entry standard in tests around the World Trade Center.

Levels above 70 structures per square millimeter do NOT imply an immediate health threat. Asbestos exposure becomes a health concern when high concentrations of asbestos fibers are inhaled over a long period. Illness is very unlikely to result from a single, high-level exposure, or from a short period of exposure to lower levels. " The air samples were collected by Americo Rodriguez Jr. ((License #AH 89-07160)) NY State Department of Labor Project Monitor.

Sincer

J sh a Sarett L Environmental Incorporated

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NYC-WTC 000121159

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NYC-WTC_000121159Source: NYC Law Department, mirrored locally

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