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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 H New York, New York 10010 wvvw.atc- envro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES I N C.

September 25, 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. 8883:

Client: D.E.P. Project Name: D.E.P. Clean-up, 125 Cedar St., NY, NY Location: Entire Building Samples received: 09/23/02 today These results will confirm and document the data transmitted performed in strict conformance to your office. The analyses were 30, 1987) • with the methodology of the AHERA Final Rule (CFR October for clearance of abatement sites. the attached The results of the sample analyses may be found on document. volume Results reported as Struct/cc are a function of air collected in the field and are, as such, not verifiable by this reproduced only in its entirety and laboratory. This report may be not without prior permission of this laboratory.

received full We are pleased to note that our TEM lab has recognized accreditation from NVLAP, as is currently required for approval analysis of TEM air samples for AHERA projects, and also These analyses were under the NY State DOH ELAP program. performed by ATC d/b/a ATC Associates Inc.

me regarding any questions relating to these Please contact materials.

Very truly yours,

~3 Michael A. Gor ycki , -'Ph.D. Director of Electron Microscopy

NYC-WTC 000129813

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NYC-WTC_000129813Source: NYC Law Department, mirrored locally

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