Silica analysis report, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

207 Haddon Avenue ► EMSL Analytical, Inc.- Westmont, NJ. 08108 (856) 858-4800 12/7/01 Attention'. Sven Roddenbeck U.S.EPA - Residential ATSDR Mail Stop E-32 1600 Clifton Road., ME Atlanta, GA- 30333

Project; Residential Sampling Ret Number; 360100663

Silica Analysis Performed by Method NIOSH 7500 Crystalline Particle Analysis Performed by X-Ray Diffraction (XRD)__________ Nuisance DusJ Airborne Particulate Sample Sample Aoalyte Anxiyte % .iaalytic-nl Weight Cone. Weight Cone. Aoaij’te SensWrih' Sample 1X> Identification Analyte ID Volume (mg) (msl'n?} (mg) (mi’/in-’j (L) [R]IF-R2-X-14 Quartz 1149 0.020 0.0174 <0.004 <AS WA 0.0D3S Cfistobaiiie <0012 <AS 0.0104 Tridymite N/A N/A NZA Calclie <0.004 <AS 0.0035 Ponisnd/ Lime <0.020 <AS 0.0174 Gypsum <0.004 <AS 0.003S Mica <0.011 <AS O.OOSS Halite <0.006 <AS 0.0052 Fibmus CIsss ND <AS 0.8700

[RIIF.R2-Xa-14 Quartz 1171 0.010 0.0035 <0.004 <AS N/A 0.0034 Crislobalile <0.012 <AS 0.0102 Tridymite N/A N/A MfA Calcite <0.004 <AS 0.0034 Portland/ Lime <0020 <AS 0.0171 Gypsum <0,004 <AS 0.0034 Mica <0.011 <AS 0.0094 Hsli» <0.006 <AS 0.005-1 Fibrous Glass ND <AS o.esss

John Newton 7 December, 200] Analyst Date of Analysis

DiszUimer: The laboratory can only verify the concentrations of analytes on the filter srd not ihe final concentrations due to dam obtained by non-laboraoity personnel. In the absence of a bulk dust .sample, the specific form of ctysoIlina silica tan not ba determined. Hence, alpha-quartz, the piost prevalent form of crystalline silica, will be assumed, "<■ = Less than the stated vulue The lowest reportable value ts equivalent to the .AralydiCTl Sensitivity which is calculated from the lowesl reproducible ooDcentralion of silica detectable by tlic msliumcnt. AlhLA .Accredited - Laboratory IOi51Q0192

CONFIDENTIAL, C^TY-21MC1OO_OO3434O66 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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