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Air monitoring chain of custody, 345 South End Ave, Jan-Feb

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Chain of custody for air samples collected at 345 South End Avenue buildings in late January and early February 2002.

NYC-WTC_000121364–000121407

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: Parking Garage

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NYC 9/11 Public Portal Document

East 25tr, Si New York. New York 10010

-vTC A S SOC IA ES INC www dtc-ertvirU corn 212 353 8280 Fax 212 353 8306

February 6, 2002

ALC environmental :15 W. 30th Street New York, NY 10001 Attn- Mr. Joshua Sarett

Re: Report of TEM Analysis

Dear Mr. Sarett:

Following are the results of transmission electron microscopy (TEM) analysis of air samples from our Group No. G577.

Client: Gateway Plaza Mgnt. Corp. Project Name: Suildinc 400, 375 South End Ave., NY, NY Location: Floors 8, 12 Samples received: 02/05/02 transmitted today These results will confirm and document the data analyses were performed in strict conformance with the to you. The 1987) for methodology cf the AHERA Final Rule (CFR October 30, clearance of abatement sites. on the attached The results of the sample analyses are as indicated document. of air volume Results reported as Struct/cc are a function field and are, as such, not verifiable by this collected in the entirety and in :ts laboratory. This report may be reproduced only analyses were laboratory. The not without prior permission of this Director of Electron supervised by Dr. Michael A. Gorycki, M--crosccpy. TEM lab has received full we are pleased to note that our current:y required for recognized accred, tation from NVLAP, as is samples for AHERA projects, and also approval analysis of TEM air were performed These analyses under the NY State DOH ELAP program by ATC d/b/a ATC Associates Inc regarding any questions relating to these Please contact me materials.

very truly yours,

/icnae- A Goryck-, Ph.D. Director of .E lectron Microscopy

NYC-WTC 000121395

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NYC-WTC_000121395Source: NYC Law Department, mirrored locally

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