NYC-WTC_000228486

NYC 9/11 Public Portal Document

TEM Asbestos (air) Count S t Client Name: NYC BOE ■ liters): 1920 Lab Group #: 7346 Filter Tvp. „ Area: MCE 385 mm- Lab Sample #: 14 Grid ' .. 1.2 Size: 0.01124

Client Sample #: 17 Al. _ \.mined: 0.04496 mm-

GRID BOX: i cation: 20,000 GRID ID: Accelc: oltage: 100 KeV # Grid Openings: 4 < Date: 4/6/02

Analysis Performed By: MARK PEYSAKHOV

GO. Structure Structure Type Length M or N CUb (Nonadb No F.. .B C M >=5)j Chrys Ampr ...naSD Ambg/NO No Coord <5p Elements)

Struct > 0.5u >5:1 Aspect Ratio Grid acceptance; '/= Positive diffraction pattern properties conforming to <50% undissolved filler, overlapped or folded Totals latioratory identification criteria observed <10% particulate coverage >50% coverage ate least 20 unfolded or overlapped grid squares <5% " I F i B 1 C , M ; </- EDS spearum conforming to laboratory holes or opaque areas identification criteria observed .T~n i i I AMPHIBOLES F = Single Fiber B = Bundle (<3 fibers <1 fiber diameter apart C = Clusier (>3 Intersections) Amosite Crocidolite Anthophyllite Tremolite c i N. I i

M = Matrix Actinolite NSC = No Structures Detected

CITY_21MC100_002900736

NYC-WTC_000228486