GCMS blank results for sample AE03614, March 28, 2002

NYC 9/11 Public Portal Document Library Search Compound Report , Data File : C:\MSDCHEM\1\5973N\02MAR08\0314.D Vial: 4 Acq On : 8 Mar 2002 6:03 pm Operator: Sample : 508 scan Inst : Instrumen Mise : March 8, 2002 Multiplr: 1.00 MS Integration Params: LSCINT.P Quant Method : C:\MSDCHEM\1...\HP022102 .M (RTE Integrator) Title : 508 scan method Library : C:\DATABASE\WILEY7N.L ********************************************************************* Peak Number 3 ISOBUTYRALDEHYDE, DIMETHYLA... Concentration Rank 12 R.T. EstConc Area Relative to ISTD R.T.

3.92 0.07 ug/L 34407 1,4-Dichlorobenzene-d4 9.71 Hit# of 5 Tentative ID MW MolForm CAS# Qual 1 ISOBUTYRALDEHYDE, DIMETHYLACETAL... 118 C6H14O2 000000-00-0 83 2 Propane, 1,l-dimethoxy-2-methyl- 118 C6H1402 041632-89-7 74 3 ISOBUTYRALDEHYDE, DIMETHYLACETAL... 118 C6H14O2 000000-00-0 74 4 ISOBUTYRALDEHYDE, DIMETHYLACETAL... 118 C6H14O2 000000-00-0 74 Abundance Scan 48 (3.916 min): 03514.D (-) m/z 75.00 100.00% 75

5000 55 87 47 -- — — - ■ । 41 59 71 3.60 3.80 4.00 4.20 0 !‘1211‘TTT TTTE11TTTT I - ■ i ■ ■ • ■ i 111111111 “i“ “I'1 m/z 55.10 32.51% miz—> 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #17849: ISOBUTYRALDEHYDE, DIMETHYLACETAL $$ 1,1-Dimethoxyi... 75 I 5000 TI 87 3.60 3.80 4.00 4.20 55 m/z 87.00 29.10% 41 47

Tl/Z-> 29 01PP —P -H +44 59 71 11HTPITT —mpp 1 T TTIUT 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 3.60 3.80 4.00 1 1I 4.20 5000 m/z 47.10 16.81% 87 55 47

m/z—> 0: ... 144l 59 71 1"111 ■ ■11''1111' ■ ■ —pm] :2025303540 45 50556065 70 75 80859095 Abundance #17847: ISOBUTYRALDEHYDE, DIMETHYLACETAL $$ 1,1 -Dimethoxyi... N A.. ‘ I * ' ‘ ’ I ‘ ’ 1 1'11111111 75 3.60 3.80 4.00 4.20 m/z 45.10 14.66%

50001 87 31 47 55 I 43 59 71 0+ — H ’I’t 19mppbum —pmpt 1‘!■‘ ■ ■ l ■ ■ miz—> 20 25 30 35 40 45 50 556065 70 75 80859095 3.60 3.80 4.00 4.20

03514.D HP022102.M Fri Mar 15 10:09:23 2002 Page 5

NYC-WTC_000037748