Silica analysis report, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

107 ffaddon Avenue gMSC^EMSL Analytical, Inc,- 4

12/7/01 Attention: Sven RoJdetibeck U.S.EPA - Residential ATSDR Mail Stop E-32 1600 Clifton Road., NE Atlanta. GA. 30333

Project: Residential Sampling Ref. Number: 360100663

Silica Analysis Performed by Method MOSH 7500 Crystalline Particle Analysis Performed by X-Ray Diffraction (XRP) Nuisance Dust Airbarne jParriculaie Sample Sample Analyte Analyte % Analytical Wei^t Cone. Vreicht Cone. Analyle Sensitivity Sample ID Identification Analyte ID Volume (ms) (mg/m’) (mg) (tng/m’) (ms/m’) (L)

Quartz lies 0.014 0.0120 <0.004 <AS N/A 0.0034 IR11F-R1-14 CrisloOalila <0.012 <AS 0.0103 Trldymile N/A N/A N/A Calcite <0.004 <AS 0,0034 Patuand/ Lime <0.020 <AS 0 0172 Gypsum <0.004 <AS 0 0034 Mica <0.011 <AS a.Q0S4 Halite cD.ODG <AS 0.0051 Fibrous Sloss NO <AS O.fiSTS

[R]RF-R2-14 Quartz 730 0.2S1 0.3S73 <Q.aO4 <AS N/A 0.0055 CrisioCalile <0.012 <AS 0.0164 Tridymite N/A N/A N/A Calcite <0.004 <AS O.00S5 Portland/ Lime <0.020 <AS 0.0274 Gypsum <0.004 <AS 0.0065 Mica <0.011 <AS 0.0151 Halite <0.006 <AS 0.0082 Fibrous Gloss ND <AS 1.3SS1

Quartz 1181 0.276 0.2368 <0.004 <aS M/A 0.0034 [R]TF-R2-14 Cristobalite <0.012 <AS 0.0103 Tridymile N/A N/A N/A Calcite <0.004 <AS 0.0034 Pom and/ Lime <0.020 <AS 0.0172 Gypsum <0.004 <AS 0.0034 Mica <0.011 <AS 0.0095 Halite <0.006 <AS 0.0052 Fibrous Glass ND <A5 O.SS13 PfOmi/s Stsss em in D^.r cubJc M

John Nswfon 7 Decemher, 200! Analyst Date of Analj-sis

Discluirocr: The laboratory can only verily the concentrations of analytes on the filter and not lhe final concentrations due to dace obtained by non-laboretoiy personnel. In the absence of a bulk dust sample, the ipociCc form of crystalline silica cm not be detamined. Meitcc, alpha-quartz, the most prevalent form of nystalline silica, will be assumed. “<” = Less than the slated value The lowest reportable value is equivalent to ihe Analytical Sensitivity which is calculated 6om lhe lowest reproducible concentralion of .silica detectable by the instrument. ;\1HA Accredited - Tnborjlory ID 11100192

CONFIDENTIAL, CITY_21MC1OO_OO3434O63 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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