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Silica analysis report, Residential Sampling Project, Nov 2001

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Document presenting X-ray diffraction results for silica and mineral content from residential sampling in November 2001.

NYC-WTC_000176072–000176074
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NYC 9/11 Public Portal Document

107 Haddon Avenue 4EMSL► EMSL Analytical, Inc.~ Westmont, NJ. 08108 (856) 858-4800 1I/2S/01 Attention; U.S. £PA HQ Financial Services Division 1200 Pennsylvania Avenue NW Maildrop 2734R Washington, DC. 20460

Project; Residential Sampling Ref. Number: 360100632

'Ccriiifwaifce Of Analysis 4

JJacriplJon PartlcU fO Concenlralian Analytical Satdiivity Sample ID (%)

Outdoors Quartz 13,7 0.01 (R)SS-0-7 Cristobalite ND 0.02 Tridymite ND N/A Calcite 6.6 0.01 portiandy Lime 1.3 0.05 Gypsum 12.4 0.02 Mica ND 0.05 Halite 0.1 0.03 Fibrous Glass 1.1 0.1

HalfiAiay Quartz 10.5 0,01 (RJVS-C-7 Cristchalile NO 0 03 Tridymite ND WA Calcite 0,01 Portia ndt Lime 3.2 0.05 Gypsum 14.5 0.02 Mica 009 0.05 Malte 0.04 0.03 Fibrous Glass 4.8 0.1

Analysis Peifomeil By: Polarized Light Microscopy (PLM) Scanning Electron Microscopy (SEM) X-Ray Diffraction fXRD)

John Newion 26 November. 2001 AnaJysi E>ate of Analysis TNTQ - Too Numerous To Quantify ND = None Detected

CONFIDENTIAL, CITY_21MC1OO_OO3433976 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176072

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NYC-WTC_000176072Source: NYC Law Department, mirrored locally

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