NYC-WTC_000209888

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS GROUP

Lab Sample Me. □ 2S4: ■r Type MCE 2S mm Gperacs ( lenc SpL. No 34 Axsci : 5 mm 2

Inscbument I.D. EM 13 CRX Grid :.D Gisk Nc

Screen Magnification 16.4CQZ fGO) Area mrr Coinmerx

Acc. VoLcage 83 Me 21 Sm. .'5 cd mr.

Structure Type | Length I.D. of Structure N orv/ EDS GO. structure (Nonasb. No Coord. No. >0.5 um I _ . Chrys.l Amphibole | Nonasb. Ambig./ND Elements) F B |C M < 5 urn ! » Sum

O yz J'

! I I Photo No. (from I in 5 aabestos- identify all airucturea uain< EDS Check diffraction for asbeatoa Store all unrepeated apectra containing sampies) Grid acceptance:! structures up to 70a/i^m (1st 4) <S0X undiaaolved niter, overlapped or foldea Struct. = > O.Sum ik > 5:1 Aspect Ratio <10% particulate coverage >50% coverage Totals Ns Not Oboerved (EDS apectrum or diffracUon pattern! at least 20 unfolded or overlapped grid squares PoiiUve diffraction pattern properllea conforming <5X holes or opaque areas_____________________________ F B C Y > Sum Lo laboratory Identification criteria obaerved. For chryaoUte: 0.73nm ipacing for (020) rafloctlona. O.aOnm spacing for the layer Una repeat, aireaXing -UnuMd portion or filter 'Avoided portion Chrysotile I of (110) and (130) reflections. or niter Per amphlbelos: O.SSnm layer line repeat, and approx. /Portion of niter \ '' (2mm vide) 3.3 ratio of non-twinned layer line ipoi apactng Lo ' iub)ect lo «x*min«lian ’ ' Amphibole layer Une repeal dlatance (0.53nm|. // \/'a EDS spectrum conforming lo laboratory identiflestion criteria observed. AMPHIBOLES i Ambiguous F= Single Fiber (1-3 Interaectlons = 1-3 fibers) Amosite i B= Bundle {>3 fibers <1 fiber diameter apart) C= CluaUr (>3 interaecUonal 25mm fllUr Crocidolite ! Non-asbestos Ms Matrix Slopping Rules: i Anthophyllite j j- NSD= No Structurea Delected >50 S/G.3. or in lat 4 C.O. : Tremolite ! ., , , x -js* □ ! Actinolite Non-Identified j L\DaTA\PRIVATE\MIKKC\CADDNXEM3 B/22/da

CITY_21MC100_002849276

NYC-WTC_000209918