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Chain of custody for air samples from 125 Water Street,

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Custody form documenting the transfer and analysis of air samples collected at 125 Water Street in September 2002.

NYC-WTC_000129725–000130035
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NYC 9/11 Public Portal Document

104 East 25th St. 10th Fl New York, New York 10010 www.atc- enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES I N C.

September 30, 2002 ATC Associates Inc. 104 East 25th Street New York, NY 10010

Attn: Mr. Ben Sallemi

Re Report of TEM Analysis

Dear Mr. Sallemi: (TEM) Following are the results of transmission electron microscopy analysis of air samples from our Group No. 8915:

Client: D.E.P. Project Name: D.E.P. Clean-up, 125 Cedar St., NY, NY Location: Entire Building Samples received: 09/30/02 transmitted today These results will confirm and document the data conformance strict • to your office. The analyses were performed in (CFR October 30, 1987) with the methodology of the AHERA Final Rule for clearance of abatement sites. on the attached The results of the sample analyses may be found document. air volume Results reported as Struct/cc are a function of verifiable by this collected in the field and are, as such, not and in its entirety laboratory. This report may be reproduced only not without prior permission of this laboratory. has received full we are pleased to note that our TEM lab accreditation from NVLAP, as is currently required for recognized for AHERA projects, and also approval analysis of TEM air samples ELAP program. These analyses were under the NY State DOH performed by ATC d/b/a ATC Associates Inc.

regarding any questions relating to these Please contact me materials.

Very truly yours,

ichael A. Gorycki, Ph.D. Director of Electron Microscopy

NYC-WTC 000129938

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NYC-WTC_000129938Source: NYC Law Department, mirrored locally

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