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← Document results/DEP Box 37/250 BROADWAY; Block: 124 Lot: 24 BIN: 1001408 245 Broadway, 2-4 Murray St. 1-7 Park Pl, 239- 247 Broadway
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Background sampling chain of custody, 250 Broadway, Sept 2001

Machine-extracted title · confidence 90%

Chain of custody documentation for background sampling including asbestos and lead at 250 Broadway in September 2001.

NYC-WTC_000106077–000106100

Folder label: “250 BROADWAY; Block: 124 Lot: 24 BIN: 1001408 245 Broadway, 2-4 Murray St. 1-7 Park Pl, 239- 247 Broadway

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NYC 9/11 Public Portal Document

09/17/2001 00:36 2123533599 ATC ASSOCIATES INC - PAGE Ems/

ANALYSIS ATC ASSOCIATES INC. -- NOB Operator _-- Batch No. j ^ J~_ — Grid Boa No. / Date 'IC. / Sample No. ~1 -/ 2 Grid I.D. --

intersections = 1-3 i ers) F= Single Fiber (1-3 Amy=tee B= Bundle >3 fibers <1 fiber diameter a part) Crocidoli C= Cluster k>3 intersections) kntho =. Treme-i' M= Matrix Aetinc-i' NSD= No Structures Detected identification criteria. observed conforming to Positive diffraction pattern 020 reflections (= 6 ubjecti~ m For chrysotile: 7.3A spacing for (= 1./ s Oum 10 ecfiver -ap e)u e). S.U. spacing for the layer- line repeat 002 and 200 reflections. 130 streaks and presence of approxianate 3.5 ratio of nozn - t: r amphiboles: 5.3A layer -line repeat and For to layer -lire repeat distance. layer -line ;etle.tion spacing criteria. conforming to identification EDX spectrum observed diffraction. 4 fibers by electron Chryaotiestrea 14inimum Requirements: Identity 200 points layer -line (row) spacing with -line correct 020. spacing.002. 110. 130 and Am.pbibole: Correct 5.3A layer none. Amphibole: identify amphibole species by EI EDX Requirements: Chrysotile: gUANTITATION: Mean (N)' on: Grid 1: _ Grid 2: Estimated Percent Asbestos . X K)/G: Percent Asbestos in Subsample: (N

10 X 11 = 14 total % asb From PLM NOB ANALYSIS SHEET' 11 = residue asb % TEM and 14 = where 10 = total residue %, 100/total residue Also, 1% total asbestos = ~ioa:a;?u*~:ew a\CAL r

NYC-WTC 000106095

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NYC-WTC_000106095Source: NYC Law Department, mirrored locally

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