Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. - TEM ANALYSIS LAB 3F.OUP 4 5765 - 10/26'01

Lab Sample No. 625 5 Filter Type MCS 25 mm Operator a t,L

Client Spi. No 09 Filter Area 385 rmm''2

instrument I.D EM 10 CRY Grid I.D. Disk No.

Screen Magnification 16400:: (GO) Area 3.01124 mm"Z Comments

Act. Voltage 80 kV No. GO to be Analyzed c 4. Str„ c- Torata. to 70 s,mm"

1 GO. No Coord. Structure structure type No. F B C M <° 5 m Length >. 5um Chrys. I.D. of Structure Amphibole Nonasb. N or,/

IAmbig./NDj EDS (Nonasb. Elements)

J J _~

I I

I I I

t L Photo No. (from I in 5 asbestos- containing samples) Struct. _ > 0.5um & > 5:L Aspect Ratio Identify all structures ustn EDS

N= Not Observed (EOS spectrum or dlffracUen pattern) Positive diffraction pattern properties conforming t <50% icceptance1 undissolve i .er, Check diffraction for asbestos structures up to 70a lttm (lot 4) overappe or o e <10% particulate coverage >50% coverage at least 20 unfolded or <5% holes or opaque areas overlapped grid squares Store all unrepeaLed spectra

Totals

1 to laboratory Identification criteria For abryaoUle: 0.79nm spacing for (020) reflection.. 0.59005 spacing for the layer line repeat streaking of (110) and (190) reflections. For amphlbales: 0.33nm layer line repeal and appree. 3.3 MUG of non-twinned layer line spot spacing to Unused portion of filter Avoided portion of filter (2mm visa J Chrysotile

Amphibole

1 layer line roput dlalan.m (0.59gmJ. EDS spectrum conforming to Laboratory Ambiguous IdenUtIcatlon crItena observed. PHIBOLES F= Single Fiber (1-3 observed.&175Arnosite intersections = 1-3 se fibers) B= Bundle (>9 fibers <1 fiber diameter apart) C= Cluster (>9 Intersections) 25mm filter Crocidolite Non —asbestos Stopping Bale.: Anthophyllite

I M= Matrix NSD= No Structures Detected )50 s/C.O. or in let 4 O.D. Tremolite Non —Identified Actinolite L\DATA\PRIVATE\MIxEC\CADO\TEM9 9/22/98

NYC-WTC 000104276