Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

LI ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP #. 5761 - 10/25/01 Filter Type MCE 25 mm Operator Lab Sample No. 62190 Client Spl. No. 17 Filter Area 385 mm Grid I.D. y~_ J~ Disk No. Instrument I.D. EM 10 CRX (GO) Area 0.01124 mm'2 Comments Screen Magnification. 16.400X No. GO to be Analyzed 6 ( 4.721 Struct. Corspd. to 70 s/mm Acc. Voltage 80 kV I I.D. of Structure N or,/ EDS GO. Structure Structure type Length (Nonasb. No Coord. No. F B C bI <_5 Ufn 3 5um Chrys. Amphibole Nonasb. Ambig./ND Elements

LP Al, 2 (~ rl

b rr

1 - -..e r.- ..~,..en. Store all unreaeated spectra- - rnoLo no. t[rom i m u .. v.. w. - .. ....1 -.. ------ -- -- • --- stru containing samples) Grid acceptance: structures up to 70.1 m (LL 4) <50% uadissolve r. overlapped or o e Struct _ O.Sum & > S:1 Aspect Ratio <LO% particulate coverage >50% coverage Totals squares Na Not Observed (EOS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid <5Z holes or o ■ sae area = positive diffraction hero properties conforming to laboratory identification criteria Unused portion For ehryasulu 0.77nm .pate[ for (020) r.n.euon.. or flit., Chrysotile 0.03025 spacing for the layer lLos repeat. streaking Avoided portion

I of (110) and (130) r.ncuona. For am bibela: 0.53nm t• .pproe. ling repeat. and a 3.5 ratio of non-intoned layer sane sp layer lion ropat distance (0.53nm). Ells specCrum conforming to laboratory sp■ci g of niter (2mm .ids)

PHIBOLES Amphibole

Ambiguous identlticaUon criteria observed. aba.rv.d.&7ii-Amosite P= Single Fiber (1-3 interactions a 1-3 fibers) B= Bundle (>3 fibers <1 fiber diameter apart) 2emm niter Crocidolite Non —asbestos C= Cluster (>3 intersections) gtypping Ruin Anthophyllite Ma Matrix >so ./c.o. or to sat ♦ c.o. Tremolite NSO= No Structures Detector Non —Identified A.-+innlitP

NYC-WTC 000104201