Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS I Lab Sample No.

Client Spl. No 5=583

19 LAP GROUP 9, 5-"': -

Filter Type MCE 25 mm

Filter Area 325 mm'2 0 2c"/O1

Operator /

Grid I.D. 1, Disk No.

I Instrument I.D. EM 10 CR.V y Screen Magnification 15,400. (GO) Area 7. 31124 mm'2 Comments

Acc Voltage 80 kV No. GO to be Analyzed 4.721 Struct. crspd. In 70 s/mm'2

I GO. No Coord. Structure structure Type No. F B C M 0 5 5 um um Length >. 5um Chrys.1 Amphibole I.D. of Structure EDS N or I/ (Nonasb. Nonasb. Ambig./ND Elements)

IT J- j --.-

I Li J

I I I H

Photo Na. ((rain 1 in 5 asbestos- Identify all structures usin EDS Check diffraction for asbestos Store all unrepeated spectra

I containing samples) Struct. = 0.5um & > 5:1 Aspect Ratio Grid acceptance: <50% undiaaoave structures u 1 er, over apps <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) at least 20 unfolded or overlapped grid squares to 70s tim or o e (let 4)

Totals V - Positive diffraction pattern properties conforming <5% holes or o a ue areas F B C M > 5um

I to laboratory identification criteria Per chryotile: 0.79nm .oee:ag for (020) reflections. 0.93nm spacing for the layer line repeat. streaking of (110) and (130) reflections. For amphiboles: 0.03nm layer line repeat. and appros. ratio of non-t.inaad layer line spot spacing to of ttlter portion

Avoided portion f tiller (2mm wide) Chrysotile

Amphibole layer Una repeat distance (D.33nm).

I EDS spectrum conforming to laboratory Identification criteria observed. observed.Gun009d Fe Single Fiber (1-3 intersections = 1-3 fibers) B= Bundle (>3 Ilbers <1 fiber diameter apart) 23mm filter PHIHCLES Amosite Crocidolite Ambiguous

Non-asbestos to luster (>3intersections) ( Stopping Rules: Anthopilyillto Y= atrix

I NSD= No Structure. Detected L•\DATA\PRtVATE\M1XEG\CADD\TEY3 >50 s/G.O. or In tat 4 G.O. I

9/22/98 Tremolite Actinolite Non -Identified

NYC-WTC 000104397