NYC-WTC_000205635

NYC 9/11 Public Portal Document

TC New I'otK Yorn '0010 www aicerviro com 212.353.8280 Fax 212.353.8300 , A T e s INC.

September 26, 2001

ALC Envi” ■ .nmenta1 r , V, w 3 0ch i-tzeet wew -or'. '-Y Attn: Mr.

: Report of TEM Au.alysis

'ear Mr Following are t.he results of trni'sm.ics ion electron microscopy (TEX) analysis of eleven PCM air samples from our Group No. S355;

Client hid-State Project Name; 345 and 35= Southend Avenue Location: Kaliways and Apartments, Buildings 100 --a 2'1j Samples received in TEM Lab; 09/26/01

These results will confirm and document oata transmitted to you today. The analyses were performed in strict conformance with the methodology of Che NICSH method 7402, Issue 2, August 15, 1994

rorty grid openings from each of the samples were s.xamined at relatively low magnifications I approximately L.OOOX and ;0,coox; for structures greater than Sum in length and idths bet’veen 0 2 Sum and 3uin. arid having a length - to-widt.h ratio area ter than j . 1 These structures would be large enougn to ;be observed by PCM analysis. Asbestos and non-asbestos structures were dets :tsd in the samples in Che following proportions

sample chrysotile gypsum cellulose f iber F/CC as number class Asbestos

3 0.0% 93.8% 0.0% 6.2% 0.0 4 22.2% 77,8% 0.0% 0.0% 0.005 S 0.0% 76.9% 0.0% '23.1% 0.0 6 0.0% 55.0% 0.0% 45.0% 0.0 S 0.0% 76.2% 9.5% 14.3% 0.0 13 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% 3 3.3% 0.0 20 0.0% 42.0% 0.0% 58.0% 0.0

CITY_DEP_WORBY_CANNATA_SUBP_000006444

NYC-WTC_000205635