Silica analysis report, Residential Sampling Project, Dec 2001

NYC 9/11 Public Portal Document

107Haddon Avenue 4EMSC► EMSL Analytical^ Ina- Westmont, NJ. O8IO8 (856) 858-4800 1.2/4/01

Attention; U.S.EPA HQ financial Senices Division 1200 Pen.nsyh'ania Avenue NW Maildrop 2734R WaahingtOTi, DC. 20460

Project: Residential Sampling Ref. Number: 360100623

Silica Analysis Performed by Method MOSH 7500 Crystalline Particle Analysis Performed by X-Ray DiffractionQflRD)______ __ Nuixance Dual Airborne Particulate Sample Snmpfc .■tiinlytc Analyte % Aoaljtical Weight Couc. Wcisihl Cone. Analyte Sensitivity Sample ID Identification Analyte ID Volume (rag) (mg/m’) (rag) (ing/m’) (nig/m^) (L) [KJP.F-O-, QuarE 793 0.000 O.DOOO 0.005 0.0067 N/A O.DOSO Cristobalite <0.012 <AS 0.0151 Tridymite N/A N/A N/A Calcite 0.005 0.0061 0.0050 Portland/ Lime 0.022 0.0272 0.0252 Gypsum 0,004 0.0052 0,0050 Mios 0.011 0.0139 0.0138 Halile o.ooe 0.0076 0.0Q7S Fibrous Glass ND <AS f.26O4

Quartz 1286 0.174 0.13S3 OMi 0.0037 2.3 0.0031 (RJTF-<M Cristobalite <0.012 <AS 0,0093 Tridymite N/A N/A N/A Caldte 0.004 0.0033 0.0031 Portland/ Lime 0.022 0.0169 0.0155 Gypsum 0.004 0.0033 0.0031 Mica <0.011 <AS 0.00 80 Halite o.ooe 0.0047 0.0047 Fibrous Glass ND <AS 0.7774

(R1IF-O-<1 Quartz 1288 0.Q22 0.0171 O.OOS 0.0037 18.2 0.0031 Cristotallte <0,012 <AS 0.0093 T/iflymte WA N/A N/A Calcite 0.005 0.0037 0.0031 Portland/ Lime 0.020 0.0158 0.0155 Gypsum O.004 0.0031 0.0031 Mica 0.011 0.0085 0.0005 Halrte 0.006 0.0047 0.0047 Fibraus Glass ND <AS 0.7755 BJ/BW Gixa Results In tber: per nbi: M

John Newton 4 December, 200/ Analyst Date of Analysis Disclainwr: Tht Jaborutoiy can only verify the conCCTirmtions of analytes on the alter and not the Coal concenttations due w data otrained by non-laboratory personnel. In ihc absence of a bulk dust sample, the spociCc thrm of crystalline silica can not be determined. Hence, alpharquartz. ilie most prevalent tenn of crystalline silica, will be assupnod. = Less thia the stated value The lowest reportable value is cquivajent to the Analytical Sensitivity which i.i calculated from the lowest reproducible conocntratioii of silica detectable by the instrument aIHA Acciedilcd - Laboratory ID 4100192

CONFIDENTIAL, CITY_2IMCl00_003433958 SUBJECT TO PROTECTIVE ORDER NO. 2, SEPT. 2008

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