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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 Ft New York, New York 10010 www.atc-enviro.com 212.353.8280 Fax 212.353.8306 ASSOCIATES I N C.

October 8, 2002 ATC Associates Inc. 104 East 25th Street New York, NY 10010

Attn: Mr. Ben Sallemi

Re: Report of TEM Analysis

Dear Mr. Sallemi: electron microscopy (TEM) Following are the results of transmission Group No. 8942: analysis of air samples from our

Client: D.E.P. St., NY, NY Project Name: D.E.P. Clean-up, 125 Cedar Location: Around Building Samples received: 10/08/02 the data transmitted today These results will confirm and document performed in strict conformance • to your office. The analyses were Final Rule (CFR October 30, 1987) with the methodology of the AHERA for clearance of abatement sites. may be found on the attached The results of the sample analyses document. function of air volume Results reported as Struct/cc are a not verifiable by this collected in the field and are, as such, only in its entirety and laboratory. This report may be reproduced this laboratory. not without prior permission of our TEM lab has received full We are pleased to note that required for recognized accreditation from NVLAP, as is currently projects, and also approval analysis of TEM air samples for AHERA These analyses were program. under the NY State DOH ELAP Inc. performed by ATC d/b/a ATC Associates any questions relating to these Please contact me regarding materials.

Very truly yours,

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

NYC-WTC 000129954

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NYC-WTC_000129954Source: NYC Law Department, mirrored locally

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