GCMS analysis results, sample AE12479, June 2002

NYC 9/11 Public Portal Document Library Search Compound Report Data File : C:\MSDCHEM\l\DATA\052902\12479.D Vial: 21 Acq On : 30 May 2002 2:22 am Operator: McLean Sample : gc/ms scan 5/28 fb 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 10 Methylene Chloride Concentration Rank 9 R.T. EstConc Area Relative to ISTD R.T.

4.53 1.17 ug/L 813534 1,4-Dichlorobenzene-d4 9.90 Hit# of 5 Tentative ID MW MolForm CAS# Qual 1 Methylene Chloride 84 CH2C12 000075-09-2 36 2 1-Butyne, 3-chloro- 88 C4H5C1 021020-24-6 9 3 Butanoic acid, 2-methyl-, methyl... 116 C6H12O2 000868-57-5 9 4 Butanoic acid, 2-methyl-, methyl... 116 C6H12O2 053955-81-0 9 Abundance Scan 247 (4.531 min): 12479.D (-242) (-) m/z 49.10 200.00% 49 57 88

5000 41 101 35 82 ■ ■ i ■ ■ ' ■ i ■ ■ ■ ■ 1 1 ■ • ■ i • ■ ■ ‘ 1 4.20 4.40 4.60 4.80 0- ■ ■ l ■ l I 1 1 1 ' I ‘T-n-f I ■ ‘ ‘ 1 I ‘ ‘ ‘ ‘ I ■ ‘ ‘ ■ l ' ‘ m/z 57.20 89.19% niz-> 10 20 30 40 50 60 70 80 90 100 110 120 Abundance #111040: Methylene Chloride 49 84

5000- TTI I I > i | l r 4.20 4.40 4.60 4.80 35 m/z 88.00 79.70% 14

Mhow/WAzcd - 28 I 41 70 01 — — ■ 1Bhr ‘Ba* 111I1IIIu go "ioo 'iio '126' miz-> 10 20 30 40 50 60 70 80 Abundance #35691:1-Butyne, 3-chloro- 53 83 ‘ ‘ i ■ ■ ■ ■ i ■ ■ • ■ i ■ ■ ■ ■ i ' ■ ■ ■ i 4.20 4.40 4.60 4.80 5000 m/z 86.00 42.53%

39 61 75

voas,i - 01 -44 mfz~> 10 20 30 40 50 60 70 80 90 100 110 120 Abundance #117026: Butanoic acid, 2-methyl-, methyl ester 57 83 4.20 4.40 4.60 4.80

50001 29 41 101

O' ... 51 । 169 75 81 L , 4 Trr —111 116 TT1 1 111 1 1 1 1 U’ET 1 11 i 1 1 1 1 1 1 11 1 1 1 11 ■ 1 ■ ■ ’ * 1 ‘ ’ 1 1 1 ‘ 1 1 I ‘ ‘ * I ‘ ’ • 1 1 miz-> 10 20 30 401 50 60 70 80 90 100 110 120 4.20 4.40 4.60 4.80

12479.D 052202.M Mon Jun 03 11:41:52 2002 Page 13

NYC-WTC_000014502