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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 New York, New York www.atc-envir( 212.353 ASSOCIATES I N C . Fax 212.353

ATC Associates Inc. October 16, 2002 104 East 25th Street New York, NY 10010

Attn: Mr. Ben Sallemi

Re: Report of TEM Analysis

Dear Mr. Sallemi:

Following are the results of analysis of air samples from transmission electron microscopy (TEM) our Group No. 8980: Client: D.E.P. Project Name: D.E.P. Clean-up, 125 Cedar St., NY, NY Location: Around Building Samples received: 10/14/02

These results will confirm and to your office. document the data transmitted today The analyses were performed the methodology of the AHERA in conformance with Final Rule (CFR October 30, 1987) clearance of abatement sites. for

The results of the sample analyses may be found on the document. attached

Results reported as Struct/cc are a function of air collected in the field and are, as volume such, not verifiable by this laboratory. This report may be not without prior permission reproduced only in its entirety and of this laboratory. We are pleased to note that our TEM lab has accred i tation from NVLAP, as is received full currently required for recognized analysis of TEM air samples for under the NY State DOH ELAP AHERA projects, and also approval program. These analyses were performed by ATC d/b/a ATC Associates Inc. Please contact me regarding any materials. questions relating to these

Very truly yours,

• Michael A. Gorycki, Ph.D. Director of Electron Microscopy

NYC-WTC 000130029

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NYC-WTC_000130029Source: NYC Law Department, mirrored locally

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