Silica analysis report, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

107Haddon Avenue KMSL EMSL Analytical, Fna- Westmont, NJ. 08108 (856) 858^800 12/4/01 Atteotion: U.S.EPA HQ Financial Services Division 1200 Peii3sylvan.ia Avenue NW Maildrop 2734R Washington, DC. 20460

Project: Residential Sampling Ref. Number: 360100623

Silica Analysis Performed by Method MOSH 7500 Crystalline Particle Analysis Performed by X-Ray Diffraction (XRD)_________ Nuisance Dust Airborne Particulate Sample Sample Analyte Analyte % Analytical Weight Coac. Weight Cone. Analyte SeOSitvity Sample ID Identification Aoalyte ID Volume (rag) (mg/m*) (n’t) (mc/m’> (L)

[R)RF-R1-4 Quart; 804 0.0D2 0,0025 <0.004 <AS WA o.ooso Cristobalite <0,012 <AS 0.0149 Tridymite N/A N/A N/A Calcite <0.004 <AS 0.0050 Portland/ Lima <0.020 <AS 0.0249 Gypsum 0.004 0.0051 O.OOSO Mica <0.011 <AS 0.0137 Halite <0.008 <AS 0.0075 Fibrous Gloss ND sAS 1.2^140

[PITF-RM Quartz 1294 0,151 0,1167 <0.004 <AS N/A 0,0031 Cristobalite <0.012- <AS 0.0093 Tridymite n;a N/A N/A Calcite <0.004 <AS 0.0031 Portland/ Lime <0,020 <AS 0.0155 Gypsum 0.004 0.0032 0.0031 Mica <0.011 <AS 0.0085 Halite <0.006 <AS 0.0046 Fibrous Gloss 2.000 1.54B1 0.7731

[R]IF-R1-4 Quartz 1278 0,051 0,0399 <0.004 <AS NZA 0.0031 Crisioballte <0.012 <AS 0.0094 Tridymite N/A N/A N/A Calcite <0.004 <AS 00031 Portland/ Liane <0.020 <AS 0.0157 Gypsum <0.004 <AS 0.0031 Mica <0.011 <AS D.D0B6 Halite <0.006 0.0047 Fibrous Glass ND <AS C.rCi27 Fitrous Gtsss Rcsi/ZS era In fibers per cubic u

Jokn Neivion 4 December, 2001 Analyst Date of .Analj'sis Disclaimer; The laboratory can only verity the concentrations of analytes on the alter and not the final eoncenirations due to date obtained by non-l'jbotatory personnel. Io tite absence of a bulk dust sample, the specific form of crystalline silica can not be determined. Hance, alpha-quartz, the most prevalent form of crystalline silica, will be assumed. = Less than the stated value The lowest reportable v^ue is equivalent to the Anblyric.il Sensitivity which is calculated from the lowest reproducible concentration of silica detectable by (ho instrument. MH.A Accredited - Laboratory ID 1/100192

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SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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