Air sampling order form, crystalline silica analysis, Apr 2003

NYC 9/11 Public Portal Document p eA'R, 1 . 2003ii :':LAM. e5seJLU NsrRt' l 'rENT jj,, L r EMSL N,.', 1644 P. 4. p G'3

RMSL Analytt al, inc, 107 Raddon Arc., W mom, Nd eatos

1 Order. ID:040305286 Attn: Ass owl M.N. Khan Customer ID; JLCCSO 11J Eovironmetttal Consultan*s, Inc. Customer, p0; 201 ark Ave South, Suite 1001 Date Received: 04/05103 1223 AM Nc York, NY 10003 Fax: 21 420-6092 E1145 01der: 040305286 Project, ED, ON - WARREN SBP.VIC2 CENTER. • D.ETROIT, MI BMSL Project ID: Report Dote: 04/.14/03 Date Analyzed: 04/14/03

Silica, Cif ystalline Analysis Performed X-Ray Diffraction (XRD) NMCSH III Method 7500, Issue 3,1/15/98

II I RespirdhteDuct 4irborns Silica Stnnple Sample SIlica Silica O/, Analytical Sample ID ` dentiflcation Particle Volume Weight Cone. Weight Cone. Silica Senaftivity r ID (L) (mg) (u'ANm) (mg) (mS/m~) (ems)

'A

Notes:

I, Bulk sample nc aul rnitted with stannic set, 2. Discernable (le I blank not submitted with sample act, 3, SCesulte are not old blank corrected,

r

Disclaimer: The I soratoty can only verify the conce:uretioa of silica on the filter and not the final concennadon duc to data obtained by non-la tatory pars n nel, In the sbaence of it bulk dust sampleatelthettlie specific i°, (,1a, of ctvatallinc silica the Interferini ipealasin be l determIned hence, tie amount for each ph,a.e, i,f anticipated, will be analysed based on primary, secondary and/or tertiary peak data with cotnpariaou to calibration covet oflatown standards, It choutd be noted that ai r samples are meant or only qusntifYi09 silica (er a mineral phase) which xm t first be identified from a bulk dust sample. ".e" means lass than the ptntcd value. The lowest reportable value is equivalent to the Ana$ytiosl Sensitivity that is calculated from the lowest rcntoducibl jssimuut of specific mineral dctctable by the insaurnent.

Analyst Stephen Siegel, CIH- Lab Manager Or other approved signatory

,41J14 Accredited - Laboratory XD #100794 Fags3 of 3

NYC-WTC 000100709