Silica analysis report, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

107Haddon Avenue AEWISL^EMSL Analytical^ Inc.- Westmont, NJ. 08108 (856) 858-4800 12/26/01 Attention: U.S. EPA HQ Financial Services Division 1200 Pennsylvania Avenue NWMaUdrop2734R Washington, DC. 20460

Project: Residential Ref. Number: 360100701

Silica Analysis Performed by Method NIOSH 7500 Crystalline Particle Analysis Performed by X-Ray Diffraction (XRP)___________ Nuisance Dust Airborne Particulate Sample Sample AiinJytc AealyK- % Analytical Weighl Cone. Weisht Cone. Analyte Senjitivito' Sample ID Identifi cation Analyte ID Volume (rag/m’) (mS/m^) (nijj/m’) (tng) ("g) (L) Quartz 0 A N/A <0.004 N/A N?A N/A Cristehairte <0.012 N/A N/A TriOymile N/A N/A N/A Calcite <0.004 H/A N/A Portland/ Ume <0.020 N/A N/A Gypsum <0.004 N/A N/A Mies <0,011 N/A N/A Halite <0.006 N/A N/A Fibmus Glass NO tJ/A WA

(f?ITF-R2-X-23 Quartz 1612 D.O40 0.0248 <0.004 -AS N/A 0.0025 Cristobalite <0,012 ’AS 0.0074 Tridymita N/A N/A N/A Calcite <0.004 -AS 0.0026 Portland/ Lime <0.020 -AS 0.0124 Gypsum <0.004 •AS 0.0025 Mica <0.011 -AS o.oose Halite <.0.006 •AS 0.0037 Fibrous Glass ND <AS 0.6205 Flbtous Glass Raaulis la Sbtn per cubic M

./ohn Newton 26 December, 2001 Analyst Date of Analysis Oisciflimcr: The laboratory can only verify the concentnillons ofanalytes on the filter and not the final concentrations due to data obtained by DOn-Iaboratory personnel. In the absence of a bulk dusl sample, the specific form of crystnllinc silica can not be 'letetmined. Hcncc, alpha-quartz, the most prevalent form of cryaaltine silica, will be assumed. = Less than the gilial value The lowest rcporetble value is equivaleni to the Aniilyrtical Sensitivity which is calculated from the lowest reproducible concentration of silica detectable by the instrument AIHA Accredited - Laboratory ID III 00192

CONFIDENTIAL, CITY_21MC100_003423318 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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