NYC 9/11 Public Portal Document
jig
ENVIRONMENTAL The First Choice for Environinental Tcsting & Consulting
INCORPORATED
December 10, 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(s): November 29, 30, December 3, 4, 5, & 6
Gentlemen:
200,
Please fmd enclosed the air monitoring report performed at the above referenced address in the 100,
conducted via Transmission Electron Microscopy (TEM) analysis at the
300, 400 & 500. Air sampling was
request of the owner.
Microscopy (TEM)
ATC Associates (ELAP #10879) analyzed the samples using the Transmission Electron
The results indicated that the areas achieved the acceptance criteria below <70
Methodology.
structures per mm2 set by the federal regulations. (Please See Attached TEM Report)
surrounding areas. EP.4
According to the EPA, "In evaluating data from the World Trade Center and the
Eniergenc.r Response Act, to evaluate
is using a protecttve standard under AHERA. the Asbestos Hazard
a vu1 stringent standard that is used to
the risk from asbestos in the outdoor- and indoor air- This is
school budding after asbestos has been removed or abated It is
determine whether children mar re-enter a
exposure EPA has chosen to use this standard, because it is the most
based on assumptions oflong-term
even though it is unlike/i that the public will be exposed to asbestos front the
stringent and protective.
I4 orld Trade Center site for extended periods of tine
equipment through which air in the
To determine asbestos levels. air filters are collected from monuoring
school building has passed and viewed through a microscope The number of structures - material that has
or to it - is their counted The measurements must be 70 or fewer .structures per square
asbestos fibers on
millimeter before children are allowed inside
Occupational Safer and Health
There is also a federal standard for asbestos exposure under OSHA. the
Act. which is used to protect workers on-the-job Tire standard is I fiber per- cubic centimeter averac.ed
over an eight -hour den To he as protecttve as possible. EPA is using the school ;'c-entns' standard in tests
around the World Trade Center
Asshestos
Levels above 70 sn-uctur'es per square millimeter do NOT imp/c an ttnniediare health threat
becomes a health concern when high coreentrationc of ashestrs Iihers arc inhaled over -ci long
exposure
period /l/nets is ven unlike/c' to result from a single. high-level exposure_ or Irom a .short period of
exposure to lower jewels
State Department
The air samples were collected by Americo Rodriguez Jr ((License ttAli 8i-0' l60)1 'I
of Labor Project Monitor
Sin v. J
Jos ua Sarett
C Environmental Incorporated
1 1 5 Wrct 30th Street • I I th Floor • veti fork_ 'yeµ l ork 10001 • 212 2'u 1001 • S81 4bo 3o20 • Fa z 2122'Q h74'
Nume O ice Thy hnccvm • 'uitr. rvii' • _ti(' , hr rich , (rrc f hu.t cinhi:: " _ .° t c' a u" • v s ;:' • Fa,.
T '1. us, 'u.c , err
N
NYC-WTC 000121138
OCR can misread numbers and units. Confirm readings against the page image before using them.