Chain of custody for air samples from 125 Water Street,

NYC 9/11 Public Portal Document

v ~ . 104 East 25th St., 10th F New York. New York 1001( vwvw a tc- env'ro.corr 212.353.828( Fax 212.353.830( ASSOCIATES I N C.

September 27, 2002 ATC Associates Inc. 104 East 25th Street New York, NY 10010

Attn: Mr. Ben Sal] mi

i.e: Report of TEM Analysis

Dear Mr. Sallemi: (TEM) Following are the results of transmission electron microscopy analysis of air samples from our Group No. 8898:

Client: D.E.P. Project Name: D.E.P. Clean-up, 125 Cedar St., NY, NY Location: Around Building Samples received: 09/26/02 transmitted today These results will confirm and document the data strict conformance • to your office. The analyses were performed in October 30, 1987) with the methodology of the AHERA Final Rule (CFR for clearance of abatement sites. found on the attached The results of the sample analyses may be document. of air volume Results reported as Struct/cc are a function as such, not verifiable by this collected in the field and are, be reproduced only in its entirety and laboratory. This report may laboratory. not without prior permission of this has received full We are pleased to note that our TEM lab recognized accreditation from NVLAP, as is currently required for and also approval analysis of TEM air samples for AHERA projects, were These analyses under the NY State DOH ELAP program. performed by ATC d/b/a ATC Associates Inc.

regarding any questions relating to these Please contact me materials.

Very truly yours,

/ t945L Michael A. Goryck', Ph.D. Director of Elec_ron Microscopy

NYC-WTC 000129905