TEM Asbestos air sample results, NYC BOE, Nov 2001

NYC 9/11 Public Portal Document

TEM Asbestos / air) Count Sheet Client NYC BOE Volume (liters): 1928 Lab Cii 5970 Filter Type Filter Area: MCE 385 mm- LabSani!) 9 Grid Opening Size: 0.01124

Client 9 Area Examined: 0.04496 mm*

GRID BM Magnification: 20,000 GRID ID: Accelerating Voltage: too KeV # Grid Qi) ■igs: 4 Analysis Date: 11/25/01

Analysis Performed By: ROMAN PE'i S.AKHOV

GO, Structure Structure Type Length ID of Structure N or 9 EDS No Arnphibotej Nonasb (Nonadb F B C I M >=5|j Chrys Ambig/ND No Cooir <5p Elements)

3*9 if i/ if

I i Struct = > 5: I .Aspect Ratio Grid acceptance: Positive ditha-fi r, pattern properties conforming to ^50% undissolved litter, overiaoped or folded Totals laboratory ider.iifii, roii criteria observed <10% particulate coverage >30% coverage ale least 20 unfolded or overlapped grid squares <5% F B C 9= EDS specru! .ontorming to laboratory M >5p holes or opaque areas Identification critc- observed Chrysotile AMPHIBOLES Amphibole F = Single Fiber Amosite B = Bundle l<3 In - - -1 fiber diameter apart Crocidolite Ambiguous C = Cluster II jti- sections) Anthophyllite Non-Asbestos Tremolite M = Matrix Non-Identified Actinolite NSC = Ng Si :i. jetected

CONFIDENTIAL, CITY_21MC100_003458396 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000179180