Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

I ATC ASSOCIATES INC. - TEM ANALYSIS LAB GROUP F 5759 - !0/25'01

Filter Type MCE 25 mm Operator _ Lab Sampie No. 62521

Client Scl. No. 15 Filter Area 355 mm"2

Instrument I.D. EM 10 CRZ Grid 1.0. Disk No.

Screen Magnification 16,400X (GO; Area 0.01124 mm-2 Comments

Acc. Voltage 80 kV No. GO to be Analyzed 6 4.'2'- Struct Corspd. :c 70 s.nm'2

I GO. No Coord. Structure Structure Type No. F B C M >,0.5 um < 5 um Length >. 5um Chrys. I.D. of Structure Amphibole EDS N or,/ (Nonasb. Nonasb. Ambig./ND Elements)

2 .!

l F'_._ — v

I I' I I I I

I I L Check diffraction for asbestos Store all unrepeated spectra )

I Photo No. (tram 1 in 5 asbestos- containing samples) Struct. _ > 0.5um k > 5:1 Aspect Ratio Identify all structures using EDS Grid acceptance: <50x undlasoive structures up to 70a [1tm er, overappe or o e <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) laLea1t 20 unfolded or overlapped grid squares I (let 4)

Totals - <5% holes or opaque areas Positive diffraction pattern properties conforming to laboratory identification criteria Unused portion Far chrysotite•. 0.79nm spacing far (020) renections. 0.53nm spacing far the layer line repeat. st reaking at filter Chrysotile Avoided porLLon of (110) and (130) resections. of filter For amphiboles: 0.53nm layer line repest, and appras. (Zmm aide D.5 ratio of man-twinned layer line spot spacing to ) Amphibole layer line repeat distance (0.59nm).

EDS spectrum conforming to laboratory identification criteria observed. PHIBOLES Ambiguous observed.anniosite F= Single Fiber (1-3 intersections = 1-3 fibers) B. Bundle ((>D fibers <1 fiber diameter apart) 25mm nllar Crocidolite Non-asbestos C= Cluster (>3 intersections) gtopping Rulaa: ^ < Anthophyllite NSD=sNoi xStructures Detected 5O s/c.o or m ist • G.D. Trema lite ion-identified L\DATA\PRVATE\M1KFG\CADD\TEYc 9/22/98 Actinolite

NYC-WTC 000104282