Ambient air sampling report for 105 Duane Street, Feb 2002

NYC 9/11 Public Portal Document Lab Sample No. 62184 Client Spl. No. 12 LAB GROUP _#: 576i - 10/25/01 Filter Type MCE _25 mm Filter Area ATC ASSOCIATES INC. — TEM ANALYSIS NA) P24 rzZ|_ tk BYy Lc] |. UF Instrument 1.D. EM_10 CRX Grid I.D. Disk No. Screen Magnification 16,400X (GO) Area 0.01124 mm*2 Comments Acc. Voltage 80 kV No. GQ to be Analyzed _6 ( 4.721 Struct. Corspd. to 79 s/mn* GO. Structure |Stucture Type Length LD. of Structure Nor % (Nonaab 0.5 um ; ; ° No Coord. No. F| BIC |M z 5 um 2 Sum |Chrys.| Amphibole | Nonasb. Ambig./ND| Elements =) ae Photo No. (from | in 5 asbestos— containing samples) rane Struct. = N= Por chrysotile: 0.73nm For amphiboles: 0.S3nm layer line repeat. layer line repeat distance S3nm). EDS s trum conforming to iaboratory Identification criteria observed. Vv B= c= Cluster M= Matrix NSD= No Structures Detected >3 intersections) > 0.5um & > S:1 Aspect Ratio Not Observed (EDS spectrum or diffraction pattern) = Positive diffraction pattern properties conforming to laboratory identification criteria observed. Fore P im spect fr (020) refiection 3am spacing for yer line repeat, streaking of (110) and (130) reflections. 4.5 ratio of non-twinned wire line spot spacing to P= Single Fiber (1-3 intersections = 1-3 fibera) Bundle {33 fibers <1 fiber diameter apart) Identify all structures usin, EDS rid acceptance: and a Portion of filter Spprox subject to examination 25mm Miter Stopping Rules: >80 2/G.0. or in Ist 4 G.0. NYC-WTC_000104195 <50% undissolved PP <10% particulate coverage >S0% coverage at least 20 unfolded or overlapped <5%_holes_or opaque Check diffraction for asbestos > to 70s/mim (ist 4) Sr, grid squares Store all unrepeated spectra Totals M > Sum FB C Chrysotile Amphibole | i Ambiguous AMPHIBOLES Amosite Crocidolite Non-asbestos Anthophyllite Tremolite Non-Identified Actinolite