Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TENT ANALYSIS LAB GP.CUP X 5' - %2S'01 Lab Sample No. 525?3 cil:er Type MC= 3_ mm ;pera~or Client SDI. No 25 __ ,!:er Arta 245 mm -2 Instrument =.D EM 10 C;7_:{ Gr..d ..:. u ."' •, Dal_ Nc Screen Magnification 15,400. IGGi Area --- 'nn= Ccmmencs Acc Voleage 80 kY No GC' er A iC=d i 4 -_ _ _ rscd __ 5 5rn2

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

EK t

I 1 1 1 1 1 Photo No. (from 1 in 5 asbestos- Identify all structures using EDS Check diffraction for asbestos Store all unrepeated spectra

1 containing samples) Struct. = > 0"5um h > 5:1 Aspect Ratio Grid acceptance: ,5O2 undtssdlve i ar, structures up to 70e Tnm (lot 4) averappe or o e ,lox particulate coverage >5O% coverage Na Not Observed (EDS spectrum or diffraction pattern) let least 20 unfolded or overlapped grid squares <5% holes or opaque areas Totals

Positive diffraction pattern properties conforming

1 to laboratory identification criteria observed. For chrysoti/e: 0.7Jnm spacing for (020) renactioes, 0.5Dem spacing far the ayer line repeat. streaking of (110) and (130) reflections. Par amphiboles 0.5Oam layer line repeat. and app mtrr Unused portion of filler Avoided portion of filler (2mm sidel Chrysotile

Amphibole 0.5 ratio of nen-twinned layer tine spat spacing to PortioI e*1 examination P layer line repeat distance (0.50nm(.

1 ✓o EDS spectrum conforming to laboratory identification crltana observed. F= Single Fiber (1-3 tntareections = 1-3 liberal B= Bundle (>3 fibers <1 fiber diameter apart) 25mm filter AMPHIBOLES Amosite Croeidolite Ambiguous

Non —asbestos Matrisr (>3 lnterseetiansl 9tappmg Rules: '~, Anthoohyllite K=

1 NSD= No Structures Detected L.\DATA\PRIVATE\MlXEC\CADD\TEM0 9/22/98 >50 ■/C.O. or in lot 4 C.O. I Tremolite Actinolite son —Identified

NYC-WTC 000104407