Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAP GROUP #: 57 . - -') .:25'x:

Lan SamcLe No 62582 F i:__ T.pe MC_ - nm Oper3cor

Client Spl. No 19 :--_-r Area 395 mm'2

Instrument 1,2 EM 10 CRX Grid 1.2. 'S - Disk NC ._ Screen Magnificaticn 16,400X ;GCI Area C :-_24 mm Comments

Acc. Voltage 80 kV NC. GO tc ne Analyzed 6 4." Struct. Corstd. t_ s mm'2

EDS GO. I Structure Structure Type Length I.D. of Structure (Nonasb. N or,/

No Coord. No. ,o.s um F B C M < 5 um >. 5um IChrys.1 Amphibole I Nonasb. jAmbig./ND Elements)

J ~~ —.t2—

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Photo No. (from I in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectrat containing samples) Grid acceptance: structures u to 708 tilm (1st 4) <50% undissolve i er, over apps or ode T, O y, Struct = > 0.5um & > 5:1 Aspect Ratio Totals 1 1a lS <10% particulate coverage >50% coverage N= Not Observed (EDS spectrum or diffraction pattern) lot least 20 unfolded or overlapped grid squares <5% holes or opaque areas Positive diffraction pattern proportion conforming to Laboratory identification criteria Unused portion For ehryaoUle: 0.73nm spacing for (020) reflections, of filler Chrysotile 0.59nm spacing for the layer line repast. streaking Avoided portion of (1to) and (190) reflections. ( filter For amphiboles: 0.39nm layer line repeat, and appres. (2mm wide) 9.5 rate of non-twinned layer line spat spacing to I Amphibole layer line repast distance (0.53nm), observed.Ce.x*m,!n.Uon I

EDS spectrum conforming to laboratory Ambiguous identification criteria observed. AMPHIBOLES F= Single Fiber (1-3 Intersections = (-3 fibers) ', Amoclte 8= Bundle (>3 tubers <1 fiber diameter apart) 25mm filter Croeidolite Non — asbestos'. C Cinder >3 intersections) ~~Stappina Ruies: i Anthophyllite $= Metrt K Maui: NSD= No Structures Detected >50 s/G.O. or in 1st 4 G.O. Tremolite Yon —Identified Actinolite L\DATA\PRIVATE\MIKEC\CADOVEM3 9/22/98 1

NYC-WTC 000104396