Silica analysis report, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

107 Haddon Avenue gwisu^EMSL Analytical, Inc.- 12/7/01

Attention: Sven Roddenbeck U.S.EPA - Residential ATSDR Mail Stop E-32 1600 Clifton Road., NE Atlanta, GA. 30333

Proiect: Residential Sampling Ret Number: 360100663

Silica Analysis Performed by Method NIOSH 7500 Crystalline Particle Analysis Performed by X-Ray Diffraction (XRD) Nuisance Dust Airborne Pardculaie Sample Sample Analyte .Analyte % AnalyriCfll Weight Cone. Weight Cone. Ana<y« Sen-iitivity Sample fD Identification Analyte ID Volume (mg) (njg/m’) (mg) (mg/m’) _________ CD {RJIF-0-14 Quartz 1169 0.028 0.0222 <0.004 <AS N/A 0,0034 Crisiobalita <0.012 <AS 0,0103 Tndymiie N/A N/A N/A Calcite <0.004 <AS 0.0034 Portland/ Lime <0.020 <AS 0.0171 Gypsum <0.004 <AS 0.0034 Mica <0.011 <AS 0.0094 Halite <0.006 <AS 0.00S1 Fibrous Class <AS Q,eSS7

(RJRF-C-14 Qusrtz 719 0,095 0.1321 <0.004 <AS N/A 00056 Cristobal Ite <0.012 <AS 0.0167 Tridymte N/A N/A N'A Calcite <0.004 <AS 0.0056 Portland/ Lime <0.020 <A3 0.0275 Gypsum <0.004 <AS 0.0056 Mica <0.011 <AS 0.0153 Halite <0.006 <AS 0.0083 Fibrous Class mo <AS t.33D4

[RJTF-C-14 Quartz 1134 0.574 0 5062 <0.004 <AS N/A 0.0035 Cristobalite <0.012 <AS 0.0106 TriOymlte N/A N/A N/A Caldle <0.004 <AS 0.0035 Poiiiand/ Lime <0.020 <AS 0.0176 Gypsum <0.004 <AS 0,0095 Mica <0.011 <AS 0.0097 Halite <0.008 <AS 0.0053 Fibrous Class ND <AS 0.3819 Rbnu! Sless ResMi sn: in Ubar^ of ainic M

John Newton 7 December, 200 J Analyst Date of Analysis DiscUimer: The laboratoiy can only verify the conccitmillons of analytes on the filter anil not the final cooccpnations due to data obtained by non-laboratory personnel. In the absence of a bull; dca sample, the specific form of crystalline silica can not be determined Hence, alpha-quiro, the most prevalent ftrm of eiystalliac siba, will ba assumed. - Leas than the starts value The lowest reportable value is equivalent to the Analytical Sensitivity which is calculated from the lowest reproducible cooceatrarion ofsilica detectable by tlie instrumenL AIHA Accredited - Laboratory ID # 100192

CONFIDENTIAL, CITY_21MC1OO_OO3434O61 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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