NYC-WTC_000205643

NYC 9/11 Public Portal Document

104 East 25th Str« New York. New York 100 www.aic- enviro .cc 2l2.353.82i Fax 2l2.353.83i o c I * T 6 s INC.

IStL....... September 26, 2001 ALC Envi roni. ant a .1 W. 30th street Attn: Mr. . Re: Report cf TEM A_-';'^iyeis Dear Mr.

Fol lowing are the results of trai'.smiision electron microscopy (TEM) ana'.-vsis of eleven PCM a-i.;- srrr.ples from our Group No. 5556; Client Project Name: 345 and 355 Southend Avenue Location: Hallways and Apartments, Buildings 100 and 200 Samples received in TEM Lab: 09/26/01 These results will confirm and document the data transmitted to you today. The analyses were performed in strict conformance with the methodology of the NIOSH method 7402, Issue 2, August 15, 1994. Forty grid openings from each of the samples were examined at relatively low magnifications (approximately l.OOOX and 10,000X) for structures greater than Sum in length and widths between 0.2Sum and 3um, and having a length-to-width ratio greater than 3:1. These structures would be large enough to be observed by PCM analysis. Asbestos and non-asbestos structures were detected in the samples in the following proportions;

sample chrysotile gypsum cellulose fiber F/CC as number glass Asbestos

3 0.0% 93.8% 0.0% 6.2% 0.0 4 22.2% 77.8% 0.0% 0.0% 0.005 5 0.0% 76.9% 0.0% 23.1% 0.0 6 0.0% 55.0% 0.0% 45.0% 0.0 8 0.0% 76.2% 9.5% 14.3% 0.0 12 0.0% 77.3% 9.1% 13.6% 0.0 14 0.0% 100.0% 0.0% 0.0% 0.0 17 0.0% 100.0% 0.0% 0.0% 0.0 18 3.6% 68.7% 0.0% 27.7% 0.001 19 0.0% 66.7% 0.0% 33.3% 0.0 20 0.0% 42.0% 0.0% 58.0% 0.0

CITY_DEP_WORBY_CANNATA_SUBP_000006522

NYC-WTC_000205643