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Chain of custody for environmental assessment, Nov 2001

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Chain of custody form documenting bulk sampling and air monitoring at 375 South End Avenue on November 17, 2001.

NYC-WTC_000095331–000095453

Folder label: “345 SOUTH END AVENUE Block: 16 Lot: 100 BIN: 1083378

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NYC 9/11 Public Portal Document

104 East 25th Street New York. New York 10010 www.atc-enviro.corn 212.353.8280 Fax 212.353.8306 A 3 S O C I A T E S I N C.

October 11, 2001

ALC Environmental 115 W. 30th Street New York, NY 10001 Attn: Mr. Joshua Sarett

Re: Report of TEM Analysis

Dear Mr. Sarett:

Following are the results of trar.smissior. e_ectrcr. microscopy (TES!) analysis of air samples from cur Group No. 5661.

Client: Gateway Plaza Mr.gt. Corp. Project Name: Building 400 at Gateway Plaza - 375 South End Ave. Location: Various Sites Samples received: 10/10/01

These results will confirm and dccun.ent the data transmitted today to you. The analyses were performed conformance with the n strict

methodology of the AHLR.A Final Rule (CFR October 3C, _:87; for clearance of abatement sites As indicated on the attached Summary Results sheet, less than 70 asbestos structures per mm, was detected in all cf the twenty-five samples submitted from the site.

Results reported as Struct/cc are a function of air volume collected in the field and are, as such, not verifiable by this laboratory. This report may be reproduced only in its entirety and not without prior permission of this laboratory. If the post- abatement inside samples pass, the response action may be considered to have been completed. The analyses were supervised by Dr. Michael A. Gorycki, Director of Electron Microscopy. Lilll- We are pleased to note that our TEN lab has received from NVLAP, as is currently required for recognized accreditation analysis of TEM air samples for AHERA projects, and also approval

under the NY State DOH ELAP program. These were performed analyses

by ATC d/b/a ATC Associates Inc.

Please contact me regarding any questions relating to these materials.

Very truly yours,

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

NYC-WTC 000095401

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