NYC 9/11 Public Portal Document
02/21/02 15:36 FAX ROCKROSE IM 004
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GCIEWIRONMENTAL ADVISORY INC.
655 Third Avenue
1 New York, NY 10017 (212) 986-9460 Fax: (212)986-9464-
February 15, 2002 -
Mr. Scott Walsh
Rockrose Development Corp.
290 Park Avenue South
New York, NY 10010
Re: 333 Rector Street, NYC
Dear Mr. Walsh,
GCI Environmental Advisory, Inc. collected ambient air samples within all of the
apartments as well as various common spaces within the above referenced building
during September 24 - 26, 2001.
Air sampling was conducted within the building utilizing 0.8 u, MCE sampling
cassettes employing high volume air sampling pumps during "normal" building
activities. A minimum of Nine Hundred (900) liters of air was collected to provide a
detection limit below 0.01 f/cc (fibers per cubic centimeter). All samples were pre-
and post-calibrated by means of a precision rotometer that had been calibrated with
a primary standard. Sampling blanks were collected and submitted with each group
of samples analyzed. Air sample analysis was according to NIOSH Analytical Method
7400 with results reported as fibers per cubic centimeter (f/cc). Laboratory Analysis
performed by an ELAP approved and NIOSH PAT proficient laboratory.
Laboratory analysis indicated airborne levels either below the current recommended
"Clearance Air Criteria" of 0.01 fibers per cubic centimeter (f/cc) of air according to
. Phase Contrast Microscopy (PCM) or well below the Environmental Protection Agency
IC (EPA) standard for Transmission Electron Microscopy (TEM) of Seventy (70 Structures
per cubic centimeter (Stuct/cc).
Should you have any questions or need addit . -H ' y Ir~ ~(~ m, (ii
(212) 986-9460. .~ ~~ j
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GCI ENVIRONMENTAL ADVISORY, INC PROJECTS 20(
NYC-WTC 000114083
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