Silica analysis report, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

107 ffaddon Avenue 4 ^EMSL Analytical, Ina- Westmont, NJ. 08108 (856) 858-4800 12/7/01 Attention: Sveii Jtoildenbeck U.S.EPA - Residential ATSDR Mail Stop E-32 1600 Clifton Road., NE Atlanta, GA. 30333

Project: Residential Sampling Ref. Number: 360)00663

Silica Analysis Performed by Method NIOSH 7500 Crystalline Particle Analysis Performed by X-Ray DiffractionjXRD) Nuisance Dusi Airborne Particitlate Sample Sample Analyte Analyte ’/e Analyticjl Weight Cone. Weight Cone. Analyte SeD.iitivify Sample ID Identification Analyte ID Volume (mg/m’) (mg) (mg/m') (me/™’) (mi;> (L)

Qua re 0 A NZA <0.004 N/A WA N/A (RJBTF.A-14 Cristobalite <0.012 N/A N/A Tridymite M/A N/A N/A Calcite <0.004 N/A N/A Ponland/ Lime <0.020 N/A H/A Gypsum <0.004 N/A N/A Mica <0.011 N/A N/A Halite <0.006 N/A N/A Fibmus Glasi NO N/A N/A

[RJBTF.B-1d Quartz 0 A N/A <0.004 N/A N/A N/A cristobalite <0.012 N/A N/A Tridymite N/A N/A N/A Calcite <0.004 N/A N/A Portland/ Lime <0.020 N/A N/A Gypsum <0.004 N/A N/A Mica <0.011 N/A N/A Hallie <0.006 N/A N/A FitmiK Glass ND WA N/A

(RITF-C-X-U Quartz 1138 1.170 1.0279 <0.004 <AS N/A 0.0035 Ctistebalile <0.012 <AS 0.0105 Tridymite N/A N/A N/A Calcite <0.004 <as 0.0035 Porlland/ Lime <0.020 <AS 0.017S Gypsum <0.004 <AS 0.003S Mica <0.011 <AS 0.0007 Halite io.aos <AS 0.0053 Fibnjus Glass 2.000 1.7571 0.87fi5 Ffbrous Gfjr.s Pssalis ^re in fibA/s p^rcubiz M

John Neyvfon 7 Decembe}-, 2001 Analyst Date of Analysis

Disclaimer The lahoraiury can only verify the concentrations of analytes on the filter and noi the final concentrations due W data obtained by non-laboratory pcrsunncl. la the absence of .1 bulk dust sample, the specific form of crystalline silicj can not be delenpinoL Henoe, alpha-quartz, the most prevalent ftrm of ciysCallinc silica, will be Astumed. = .Ixss than the stated value The lOKteSt reportable value is equivalent to rhe Analytie.ll Sensilivits-which is calculated 6om the lowest reproducible concentration of silica detectable by the instrument. AMA .Accredited - Laboratory ID #100192

CONFIDENTIAL, CITY_2IMCI00_003434065 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

NYC-WTC_000176086