GO Structure Structure Type Length ID of structure N or \ EOS 1
No (Nonadb 1
F B C M >=05 u >=5|j Chrys Amphibole Nonasb Ambig/ND
No Coord <5pi Elements)
I
a
(QA —
Struct = > 0.5p > 5:1 Aspect Ratio Grid acceptance-
n'= Positive diffraction pattern properties conforming to <50% undissolved (liter, overlapped or folded Totals
laboratoiy identification criteria observed <10% particulate coverage >50% coverage ate
least 20 unfolded or overiapped grid squares <5% IF B C M
\= EDS speefrurr conforming Io laboratory holes or opaque areas
identification criteria observed Chrysotile '
AMPHIBOLES Amphibole j
F = Single Fiber Amosite
B = Bundle (<3 fibers <1 fiber diameter apart Crocidolite Ambiguous
C = Cluster (>3 Iniersectionsf Anthophyllite Non-Asbestos | i
Tremolite
M = Matrix Non-Identified I
Actinolite
NSD = No Structures Delected
CONFIDENTIAL, CITY_21MC100_003468309
SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008
NYC-WTC_000181314
OCR can misread numbers and units. Confirm readings against the page image before using them.
NYC-WTC_000181314Source: NYC Law Department, mirrored locally
Laboratory report documenting transmission electron microscopy analysis of air samples collected from NYC Board of Education facilities on April 28, 2002.