GCMS method 508 scan data for WTC samples, March 19-21,

NYC 9/11 Public Portal Document

4 t Library Search Compound Report Data File : C:\MSDCHEM\1\DATA\031902\3822.D Vial: 16 Acq On : 19 Mar 2002 11:56 pm Operator: McLean Sample : RE-INJ 2/20 Inst : Instrumen Mise Multiplr: 1.00 MS Integration Params: LSCINT.P Quant Method : C:\MSDCHEM\1\5973N\5080302.M (RTE Integrator) Title : Quantitation For Method 508gcscan Library : C:\DATABASE\WILEY7N.L ********************************************************************* Peak Number 1 Cyclotetrasiloxane, octamet... Concentration Rank 2 R.T. EstConc Area Relative to ISTD R.T. 8.91 0.41 ug/L 122463 1,4-Dichlorobenzene-d4 9.54

Hit# of 5 Tentative ID MW MolForm CAS# Qual 1 Cyclotetrasiloxane, octamethyl- ... 296 C8H24O4Si4 000556-67-2 91 2 Cyclotetrasiloxane, octamethyl- ... 296 C8H24O4Si4 000556-67-2 86 3 Cyclotetrasiloxane, octamethyl- ... 296 C8H24O4Si4 000556-67-2 78 4 Cyclotetrasiloxane, octamethyl- ... 296 C8H24O4Si4, 000556-67-2 72 Abundance Scan 643 (8.908 min): 3822.D (-) m/z 281.00 100.00% 281

5000

RP 73 133 193 249265 | 8.60 8.80 9.00 9.20

m/z—> 103 O- 51 p l . : pY M .. . j ’ ’II CT 1771 ’)’T ’ I i . T* j’ i.J! m 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 m/z 282.10 31.49%

Abundance #244216: Cyclotetrasiloxane, octamethyl- (CAS) $$ 1,1,3,3,.. 281

5000 •' i' 1' 1 i' ■ '11 • ■ ' ‘ i ■ ■' • i 8.60 8.80 9.00 9.20 m/z 283.00 15.26% 73 133 193 249265

m/z—> 28451103 1209 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Abundance #244218: Cyclotetrasiloxane, octamethyl- (CAS)$$ 1,1,3,3,... 281 ‘1 P ■'11 ■ ■' i ■ ■' ■ i1 '1 ■ i 8.60 8.80 9.00 9.20 m/z 193.00 9.89% 5000

73

m/z—> 45 | 133 0 T । TIIp—it .।1।।. p. CIU—TET"TEICUITI’T177’13 J. 221 .. 249265 . 297 . 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Abundance #244217: Cyclotetrasiloxane, octamethyl- (CAS) $$ 1,1,3,3,... • ■ i ■ ‘ ‘ i •1 ‘' i ‘ ‘ ‘11 • ■ • • i 281 8.60 8.80 9.00 9.20 m/z 133.00 8.82%

5000

133 1 45 73 89 110 , | 149165 191207 0 TTn—np—uuut"—n—"TTTC——O—u21T "I’T 249265 2297 T 7 T 7 7 m/z—> 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 8.60 8.80 9.00 9.20

3822.D 5080302.M Thu Mar 21 11:50:09 2002 Page 3 NYC-WTC_000037983