Silica analysis report, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

i07 Haddon Avenue IMSC>EMSL Analytical, Inc,- Westmont, NJ. 08108 4 (856) 858-d800 12/26/01 Attention: U.S. EPA HQ Financial Services Division 1200 Pennsylvania Avenue NW Maildrop 2734R Washington, DC. 20460

Project: Residential Ret Number: 360100701

Silica Analysis Performed by Method NIOSH 7500 Crystalline Particle Analysis Performed by X-Ray DiffractioD^^RD) Nuisance Dust Airhonic Pttrticulaie Sample Sample .Ajialyte Analyte % Analytical Weight Cone. Wei^t Cone. Analyte Sensitivity Sample ID Identification Analyte ED Volume (mg) (mg/ra'‘) (mg) (inp/m’) (L)

(R]lF-0-23 Quartz 1626 0.040 0.0295 <0.004 <AS N/A 0.0025 Cristobalite <0.012 <AS 0.0074 Tridymite N/A N/A N/A Calcite <0.004 <AS 0.0025 Ponland/ Limo <0.020 <AS 0.0123 Gypsum <0.004 <AS 0.0025 Mio <0.011 <AS 0.0066 Halits <0.008 <AS 0.0037 FiDKus Glass MD FAS 0.3/52

[RjRF-C-23 Quarto 991 A N/A <0.004 <AS N/A 0.0040 Cristoballls <0.012 <AS 0.0121 Tridymite N/A N/A N/A Calcite <0.004 <AS 0.0040 Porliand/ Lime <0.020 <AS 0.0202 Gypsum <0.004 fAS 0.0040 Mica <0.011 <AS 0.0111 Halite <0 006 <AS 0.0061 Fibrous Glass 1,000 /.0039 1.003,9

[R]RF2-C-23 Quanz 1948 0.036 00233 <0.004 <AS N/A 0.002S Cristobalite <0.012 <AS 0.0076 Tridymite N/A N/A N/A Calcite <0.004 <AS 0.0020 Portland/ Lime <0.020 <AS 0.0129 Gypsum <0.004 <AS 0.0028 Mica <0.011 <AS 0.0071 Halite <0.006 <AS 0.0039 Fibmus Glass 1.000 0.0^50 0.0458 Fionus Rczufis are fi^em per catiic M

John Ne^iton 26 December, 2Q01 Analyst Date of Analysis

Disclaimer: The laboratory can only verify the coocennarions of analytes on the Liter and not ihe fioal concentrations due to data obtained by con-laboratory personnel. In the absence of a bulk dust sample, the .specific form of crystallin: silica can not be determined. Hence, alpha-quartz, the most prevalent tomi ofcrystalline silica, will be assumed. = Less than tbu .oated value The lowest reportable value k equivslcnl 10 tlie Analytical Sensitivity which is calculated from the lowest reproducible concentration of silica dctccufcic by the instrument. Al HA Accred ited - Labora tor>' ID S100192

CONFIDENTIAL, CITY_21MC100_003423312 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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