NYC-WTC_000209771

NYC 9/11 Public Portal Document

ATC ASSOCIATES INC. TEM ANALYSIS LAB GROUP # 5670 - 10/12/01 Lab Sample No 60952 Filter Type MCE 25 mm Operator Client Spl No L-2 Filter Area 385 mtn"2 Instrument I D EM 10 CRX Grid I D Disk. No Screen Magnification 16,4Q0X (GO) Area 0 01124 mm~2 Comments Acc Voltage 80 kV No GO to be Analyzed _4 ( 3 147 Struct Corspd to 10 s/mm^2 )

GO. Structure Structure Type Length I.D. of Structure N orEOS (Nonasb. No Coord. No. F B C M >0.3 um > Sum Chrys Amphibole Nonasb. Ambig./ND Elements) < 5 um

z<z 3

Photo No. (from 1 In 5 aabeaboa- Identify all etructurea mint KPS diffraction for ChacL___________ asbaatoa ______________ Star* alt unrepeaUd spectra containing samples) ■Grid aceentance:I itructurei up to 70a/Am (lai 4) <S0X undlaaolved niter, overlapped or lolded struct = > Q.Sum k > S:1 Aipect Ratio <10X particulate coverage >50X coverage Ns Not Observed (gDS apaetrum or dlffraetian pattam) at laaat 20 unfolded or overlapped grid aquarea Totals <SX holea or onaaue areas PoaiUra dlffraeUon pattara proporUea eonforminc F B C M > Sum to Uboratory IdanUfIcaUon criteria oboorvod. --------- parUm or niUr Por chryaatllaj 0.7aam aaaclnx for (BW) ranocUoao, O.saaiB spacing for the layer line repeat, streaking Chrysotile ar (110) and (190) ranoeUaas. Avoidad porUon or niUr Por ampbibales: O.Uam layer Une repeat, and approx. PortiM ar nilar (8mm rid.) 3.3 raUo of non-twtnned teyer line spot spacing to aubjact to axamtoaUoa Amphibole Uyer line repeat dlsUnce (0.03nm). t/a BOS Spectrum eonforming to laboratory Identification criteria obaerred. AMPHIBOLES Ambiguous Pa Slnila Plbar (1-3 IntaroecUooi a 1-3 flbora) Amosite Ba Bundle (>3 flbora <1 flbor dianotor apart) Ca Cluatar(>3 InUraocUona) SSmfB nitar Crocidolite Non-asbestos ------- i** Stepping Rules: I--------- , Anthophyllite M« Matrix NSDa No Slructurax OoUetad k\DATA\PWVATl\MI«C\CADOVl« [ >90 s/C.O. or in lot 4 G.O.

0/82/00 Tremolite Actinolite Non-Identified

CITY_21MC100_002842234

NYC-WTC_000209771