NYC-WTC_000205637

NYC 9/11 Public Portal Document

New Yore. New VorK lOOK wvvw.atc-cnwro.con 2'’2.353.828( Pax 2i2.353.830t 6,1 A res INC

September 26, 2001

tenvi ronment a1 Ew 30th Street ^ork. w-' LCOQi U; tn: Mx Re. Report of 7.EM Anat/Sis 1? ^Mr. STL^l'owing are the results of trariem-i ss’.on electron microscopy (TEM) i’alysis o£ thirteen ?CM air samples from our Group No 5557: I Mid-State Name. I'j and .)o5 Southend Avenue ■ linll-ays. Buildings 200 and 300 received in TZM Lab; 09/26/01

results will confirm and document the d-2X.a transmitted to you analyses were performed in strict conformance with the Chodo 1 Qgy of the NIOSK method 7402. Issue 2, August 15, 1994,

I9^1° openings from each of the samples were examined at I magnifications (approximately l.CCOX a.nd lO.OOOX: t greater than Sum in length and widths between 0 25um having a length - to - width ratio greater man 3 1 f scr’jctures would be large enough to be observed by PGM [V^fhalysis. Asoestos and non-asbestos structures were detected i.n ;.'Whe samoles in the followinc crocortions. w ' W-- sample chrysotile gypsum cellulose P/CG as number Asbestos

h' 1 14.3% 85.7% 0.0% 0.002 '.'ASSU-'’' 3 8 . 8% 55.9% 35.3% 0.001 5 0.0% 100.0% 0.0% 0.0 6 0.0% 61.1% 38.9% 0.0 8 0.0% 100.0% 0.0% 0.0 9 5.8% 94.2% 0.0% 0.001 10 0.0% 3 0.4% 69.6% 0.0 11 0.0% 83.3% 16.7% 0.0 12 0.0% 37.5% 62.5% 0.0

f 13 14 16 11.8% 0 . 0% 0.0% 60.8% 100.0% 100.0% 27.4% 0.0% 0.0% 0.002 0.0 0.0 18 0 0% 7 5.0% 25 . 0% 0.0

CITY_DEP_WORBY_CANNATA_SUBP_000006449

NYC-WTC_000205637