Silica analysis report revision, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

107 Haddon A venue EMSL Analytical, Inc.- Westmont, NJ. 08108 (856) 858^800 12/7/01 AtteDtion: U.S.EPA HQ Financial Services Division 1200 Pennsylvania Avenue NW NfeUdrop 2734R Washington, DC. 20460

Project: Residential Sampling Ref. Number: 360100635 Revision 120201

Crystalline Particle Analysis Performed by X-Ray Diffraction (XRD) Silica Analysis by Method NIOSH 7500 NuisuficeDuiff Aifbarne Analyte Siimple Sample AtiAljIc AniU><e ’.A Analytical Wdght Cone. Wei^ Cone. Analyte Sen.tit!«ily Sample l,D Identification Particle D) Volume (mg) (mg/nv’) (mg) Cmg/mb (rac/m’) (L)

[RJIFOIO Quartz T1S1 a.OSS T 0.0S51 <0,004 <AS N/A 0.D034 Cnslobalile <0 012 <AS 0.0154 T ridymrte N/A N/A N/A Calcite <0.004 <AS 0.0051 Portland/ Lime <0.02 <AS 00256 Gypsum <0.004 <AS 0.0051 Mica <0.011 <AS 0.0141 Halite <0.0QS <AS 0.0077 Fibrous Glass N'A N/A N/A

(RIRF.R1-10 Quartz 782 N/A W/A <0.004 <AS N/A 0.0052 Ccistobarrla <0.012 <AS 0.0154 TridymiiB N/A N/A WA Calcila 0.006 0.0079 0.0051 Portland/ Lime <0.02 <AS 0.0256 C/ps(jm <0.004 <AS 0.0051 Mica <0.011 <AS 0.0141 Halite <0.006 <AS 0.0077 Fibrous Glaea N/A N/A. H?A

IPITF-RI-IO Quartz 1ZZ7 O.-,12 0.0913' <0,004 <A2 N/A 0.0033 Cristobalite <0.012 <AS 0.0154 Tridymite N/A N/A N/A Calcite <0.004 <AS 0.0051 Portland/ Lime <0.02 <AS 0.025S Gypsum <0.004 </>s 0.0051 Mica <0.011 <A3 0.0141 Halite <0.008 <AS 0.0077 Fibrous Glass N/A N/A N/A

John Meyvion 2S>lovember, OJ Analyst Date of Analysis Disclaimer: The laboratoiy can only uarify tlie ceitcaitration of silica on the filler and not the 5nal conenitration due to data obtained by Bon-laboraioty personnel. In the absence of a bulk dust snmplc, the specific fofin of cryaallinc silica cm not be detennined. Hence, alpba-quanz, the most prevalent form of cryst/illinc eili». will be assumed. "‘c" = Less than Lie stated value The lowest reportable value is equivalent to The Analytical Seositivijy which is calculated from the lowe.ct reproducible concentraiion of silica deicctnbL by the instrument. /\IHA .Accredited - Laboratory fD #1.01) 192

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