GCMS blank analysis results, sample AE12288, June 2002

NYC 9/11 Public Portal Document UL.LCLX DEattil tompound KCDOL L

•Data File : C:\MSDCHEM\l\DATA\052902\LB.D Vial: 4 Acq On : 29 May 2002 12:32 pm Operator: McLean Sample : gc/ms scan 5/24 Inst : Instrumen Mise . : Multiplr: 1.00 MS Integration Params: LSCINT.e Quant Method : C:\MSDCHEM\1\METHODS\052202.M (Chemstation Integrator) Title : 508 Modified GC/MS scan Library : C:\DATABASE\NIST98.L ********************************************************************* Peak Number 7 2-Butenal, 2-methyl- Concentration Rank 11 R.T. EstConc Area Relative to ISTD R.T. 4.01 0.95 ug/L 569222 1,4-Dichlorob‘enzene-d4 9.90

Hit# of 5 Tentative ID MW MolForm CAS# Qual 1 2 -Butenal , 2 -methyl - 84 C5H8O 001115-11-3 9 2 2-Butenal, 3-methyl- 84 C5H80 000107-86-8 5 3 Krypton 84 Kr 007439-90-9 4 4 Thiophene 84 C4H4S 000110-02-1 4 Abundance Scan 158 (4.008 min): LB.D (-157) (-) m/z . 84.00 100.00 84

5000 35 50 87

Tlfe-> 01 ■ ■ i ■ • ■ ■ i • ■ • ■ i ■ 20 25 30 -+ 35 An 44 40 45 50 “ i " “ i “ " i “ “ i “ ■ ■ i “ 55 60 65 70 75 ■ i “ 80 1 85 • i • ■ ■ ■ i ■ • 90 95 3.60 m/z 3.80 35.10 4.00 4.20 23.00% 4.40

Abundance #116563:2-Butenal, 2-methyl- 55 84 W W 5000 29 3.60 3.80 4.00 4.20 4.40 | 41 m/z 86.90 17.74%

niz-> 26 44 51 0! ’ IT — T’T 111111 + Hrr 111111 - Abundance 20 25 30 35 40 45 50 55 60 K 70 75 80 85 #33657:2-Butenal, 3-methyl- 55 41 —■ |

84 ' i ■1" i' ■ 90 95 MMa 3.60 3.80 4.00 4.20 4.40 | U 5000 m/z 50.00 17.48% 29

iz-> 01 —l, wll H4H tmmmpe 20 25 30 59 65 69 35 40 38 44 45 51 । 50 55 60 65 70 75 80 85 90 95 wAMMwi Abundance #33829: Krypton ' r » i 1 I j-r • • < I •'• • 1 ] > * » • | • 84 3.60 3.80 4.00 4.20 4.40 m/z 88.00 16.28% 5000

42 ./MMWop 80 0 1111" ■ i ■111 n1111111 ■ 11 1' i11 । । ।। " i ■ ■ “ i ■ ■1 • I ■ T 1 ■ i' ■ ■' i “ m/z—> 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 3.60 3.80 4.00 4.20 4.40

LB.D 052202.M Mon Jun 03 09:27:14 2002 Page 10

NYC-WTC_000014167