Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

- TEM ANALYSIS ATC ASSOCIATES INC. LAB GROUP # 5761 - 10 25 01 Operator Filter TypeMCE_52 ME Lab Sample No. 62189 Filter Area 3 5 2 Disk No. 16 Client Spl. No. Grid I.D. Comments Instrument I.D. EMEM~_1 0.011 (GO) Area Corr d. to 70 s/ ^2 • ~ 400X ( 4.721 Struct. Screen Magnification 16 No. GO to be Analyzed 80 kv EDS Arc. Voltage (Nonasb. Length I.D. of Structure Nor structura Type Elements Ambig./ND Elemen GO. Structure 30.5 um Non 5um Chr s. Am hibole No Coord. No. F B C M < 5um

Z i (I 1/ 6 If (I ~'r

I I I I I I I I usin BDS Checx GiIr to 7shm (1st 4) Identify all atructurea ewctures u %in, to 0 tp Photo No. from 1 in 5 a'be't°'— G d acceptance: olve r. overlapped or o a Totals containtni sample.) <50'X. undiaa coverage >50% coverage quaras > 5:1 Aspect Ratio <10% particulate overlapped grid Struct, = > 0.5um fa least 20 unfolded or diffraction pattern) at N. Not Observed (SOS spectrum or <5% holes or opaque areas conforming Unused Patti" pattern properties ChrygOtlle ✓a positive dltfraction Identification criteria observed• of ruler

I F laboratory to Per ebr7aoula: for the tar Un 0.53nm spacing of (It0) and (130) For amphibole: a°i 0.».m apaefe[. reflection'• 0.53nm layer for a rafisetion.. (020)4 alnaklos m~

line Ilne repro spat sod spacing appps. to on of filter subJaat t. esaminatio° Avoided portion of filter (ttmm dda( Amphibole

3.a raue .ftepee taalb ram)• Ambiguous {per line

I pa EDS

Single spectrum idenlifladi°n criteria observed. Fiber B. Bundle (>3 conforming to laboratory

(1-3 5ban-^ <1 fib beer diameter apart)m ) mmm nwr _AMPH1 Amoalte Crocidolite Aathophylllte Non —asbestos

NYC-WTC 000104200