NYC-WTC_000176247
Comprehensive environmental assessment report prepared by TRC Engineers for the New York City Law Department.
5 shared non-person entities · similarity 0.906
machine-extracted · confidence unavailable · Check page ↗Document / 1 page
Memo regarding computer dust sampling, 100 Church Street, Feb 2002
Machine-extracted title · confidence 95%Letter from TRC Engineers describing dust sampling and asbestos analysis of computers at 100 Church Street.
NYC-WTC_000176289Page image
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NYC 9/11 Public Portal Document
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Customer-Focused Solutions
February 14, 2002
Mr. G. Foster Mills Via fax Managing Attorney (212) 232-4621 New York City Law Department 59 Maiden Lane, 28* Floor New York, New York 10038
Re: 100 Church Street - Second and Third Floor Computer/Printers - Dust Sampling Results
Dear Mr. Mills:
TRC Engineers, Inc. (TRC) conducted sampling and analysis of dust inside the computers and printers on the Second and Third floors of 100 Church Street. The intent of the sampling was to determine representative conditions inside computers and printers.
A total of eight (8) microvacuum samples were collected of the dust in the equipment on those floors and samples were analyzed for asbestos. Sampling and analysis of internal dust was conducted following the American Society for Testing and Materials Standard Test Method for Microvacuum Sampling and Indirect Analysis of Dust by Transmission Electron Microscopy for Asbestos Structure Number Concentration (ASTM 5755-95). The results of these asbestos microvacuum samples are presented in attached Table 1.
Laboratory Data and Field Data Forms are included as an Attachment to this Report.
Results of asbestos ASTM 5575 microvacuiun sampling indicate that asbestos was detected in all eight dust samples. Dust concentrations ranged from 2,140 to structures per square centimeter (s/cm2) to 240,155 s/cm2. Therefore the internal dust within the computers on the second and third floor was found to contain asbestos.
Should you have any questions or require any additional information, please do not hesitate to contact us at 212 268-9080.
Very truly yours, TRC Engineers Inc.
Edward A. Gerdts, CIH, CSP Vice President Encl.
134 West 29th Street, 1 1th Floor • New York, New York 10001 Telephone 212-563-3933 • Fax 21.2-349-4648
CITY__21 MCI 00_014587295 NYC-WTC_000176289
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NYC-WTC_000176289Source: NYC Law Department, mirrored locally
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