Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAB GRCCP H. 5-?:. - 10/ 6 01

Lab Sample No. 6258? -:er Type MCE 25 mm C=rotor

Client Spl. No. 25 P_l:er Area 335 mm"2

Instrument I.D. EM 11 CRS Grid I.D. S 'Y DisK No.

Screen Magnificat_on 16,4001: GCI Area 0.01I24 mm"2 Comments

Acc Voltage 80 kV Mc. GO to be Analyzed 4.721 Struct 7oraou. to I0 simm"=

I EDS I GO. No Coord. Structure Structure Type No. F B C M >U.5 um < 5 um Length 5um >. Chrys. I.D. of Structure Amphibole N or,/

Nonasb. Ambig./NDI ElementH) (Nonasb.

I I I El I I I

-___L -r______________

Photo No. from 1 in 5 asbeatoa- IdenUfy all structures usin EDS Check diffraction far asbestos Store all unrepeated spectra

I containing samples) Strict. = > 0.5um dt > 5:1 Aspect Ratio Grid acceptance: <50% undissolve structures u to 70s cl i er. overiappe ar o e <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or d.ffracUan pattern) a t l eas t 20 unfolded or Quayle pped g rid sq uares <5S holes or opaque areas (lot 4)

- Totals Positive diffraction pattern properties conforming to laboratory identification criteria observed. Unused portion For ch O.TJnm s layer for epee r st e aking at filler Chrysotile apacm[ for Ne firer floe repeal, streaking 9.SDnm spacing Avoided perUon I of (110) and (150) refleotione. of filter For amphiboles: 0.33nm layer line repeat, and approx. Portion of filter (2mm -ado) • elect m Amphibole p

I i/= D.3 raUo at non-twanned Layer line spot spacing m II exammaUon layer line repeat distance (0.59nm). EDS spectrum conforming to laboratory Identification criteria observed_ i AMPHIBOLES Ambiguous F= Single Fiber (1-3 intersections = 1-3 fibers) Amosite Be Bundle (>3 fibers <1 fiber diameter apart) 25mm filter Crocidolite Non —asbestos C= Cluster (>5 intersections) Stopping Rulee: I Anthophyllite M= Matrix NSD= No Structures Detected >50 •/G.0. or In tit 4 O.O. Tremolite Actinolite Non —Identified L•\DATA\PRIVATE\MIKEO\CADO\TEYS 9/22/98

NYC-WTC 000104403