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Carpet mastic asbestos analysis results letter, December 2002

Machine-extracted title · confidence 100%

Laboratory report on TEM analysis of carpet mastic glue samples from residential building common corridors confirming absence of asbestos.

NYC-WTC_000092671–000092734

Folder label: “51 HARRISON ST 142/50

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Scanned page image, NYC-WTC_000092684
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NYC 9/11 Public Portal Document

EMSLNYCNOBCHTFIELDSOP 200.0 Revison 1 February, 2002 4.0 CALCULATIONS

WI = Initial sample weight _Wf___Final_sam.pI.e. weigh.t_(pos_t._as.h,_aci-d_tr_e-atment,. filtration._a.nd drying).

R = % Residue = (Wi / Wf) *100

VE = visual estimate for NY NOB analysis

VEL = Visual estimate low range for Chatfield analysis VEH = Visual estimate high range range for Chatfield analysis

Final. Concentration for NY NOB report = (VE * R) / 100

Final concentration range for Chatfield report = (VEL * R) / 100 to (VEH * R) / 100

Controlled Copy Page 6 of 7

NYC-WTC 000092684

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NYC-WTC_000092684Source: NYC Law Department, mirrored locally

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