GCMS analysis results for sample AD29522, Feb 2002

NYC 9/11 Public Portal Document Library Search Compound Report . Data File : C:\MSDCHEM\1\5973N\02FEB01\29522.D Vial: 4 Acq On 1 Feb 2002 1:04 pm Operator: Sample : 508 scan Inst : Instrumen Mise : February 1, 2002 Multiplr: 1.00 MS Integration Params: LSCINT.P Quant Method : C:\MSDCHEM\1... \SCAN508.M (RTE Integrator) Title : 508 scan method Library : C:\DATABASE\WILEY7N.L ********************************************************************* Peak Number 2 ISOBUTYRALDEHYDE, DIMETHYLA... Concentration Rank 7 R.T. EstConc Area Relative to ISTD R.T.

3.92 0.07 ug/L 29463 1,4-Dichlorobenzene-d4 9.71

Hit# Of 5 Tentative ID MW MolForm CAS# Qual 1 ISOBUTYRALDEHYDE, DIMETHYLACETAL.. . 118 C6H1402 000000-00-0 83 2 ISOBUTYRALDEHYDE, DIMETHYLACETAL... 118 C6H14O2 000000-00-0 74 3 Propane, 1,1-dimethoxy-2-methyl- 118 C6H14O2 041632-89-7 74 4 Propane, 1,1-dimethoxy-2-methyl-... 118 C6H14O2 041632-89-7 9 Abundance Scan 48 (3.922 min): 2^22.0 (-) m/z 75.10 100.00% 75

5000 87 55 11,*/11/1/1/0—B———D—OI/E1n6/t07 41 47

miz-> 0b 5 m 84 —p “ i ■" • i “ 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 m/z 3.60 3.80 87.10 4.00 4.20 39.86% Abundance #17848: ISOBUTYRALDEHYDE, DIMETHYLACETAL $$ 1 1-Dimethoxyi... 75

5000 ■ ■ i 1 • ■ ■ i ‘ 1 i ■ • ‘ ‘ i ' • i 87 _ 3.60 3.80 4.00 4.20 15 55 m/z 55.10 27.37% 27 31 47 71 m/z-> 0- 5 T 11111117 TT 59 m 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Tpm H

Abundance #17849: ISOBUTYRALDEHYDE, DIMETHYLACETAL $$ 1 1-Dimethoxyi... 75 L ' i • • ■ ■ i ' 3.60 3.80 4.00 ■ 4.20 5000 87 m/z 47.10 16.59% 55 29 41 47 59 71 obmpmpmpm mHHT--HH D i..... HPgum m/z-> 5 1G 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #17846: Propane, 1,1 -dimethoxy-2-methyl- 75 1.... L........ _ ■ ■ ■ i 1 ■ ■ 1 i ■ ■ • • i 1 1 ' 1 i ' 1 1 ' i 3.60 3.80 4.00 4.20 m/z 41.10 14.09% 5000 87 55 31 43.47 Of TTITTTT mmmm TTOTPDTT HHTpm —pm 59 71 ' 1 i ‘ ‘ ' i 1 1 • ■ i * ■ ■ 1 i *' ’ • i miz—> 5 10 15 2025303540455055 60 65 70 75 80 85 90 95 3,60 3.80 4.00 4.20

29522.D SCAN508.M Mon Feb 04 08:41:11 2002 Page 4

NYC-WTC_000036786