GCMS blank analysis results, May 22, 2002

NYC 9/11 Public Portal Document Library Search Compound Report Data File C: \MSDCHEM\ 1 \DATA\ 0 52102 \ LB. D Vial: 10 Acq On 21 May 2002 8:40 pm Operator: Mclean Sample 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 8 Methylene Chloride Concentration Rank 14 R.T. EstConc Area Relative to ISTD R.T. 4.20 0.56 ug/L 435891 1,4-Dichlorobenzene-d4 9.90 Hit# of 5 Tentative ID MW MolForm CAS# Qual

1 Methylene Chloride 84 CH2C12 000075-09-2 9 2 Methylene Chloride 84 CH2C12 000075-09-2/5 3 lH-Imidazole-2-methanol 98 C4H6N20 003724-26-3 4 4 3-Furanmethanol 98 C5H602 004412-91/3 4 Abundance Scan 190 (4.196 min): LB.D (-186) (-) m/z 98.20 100.00% S3 84 49

5000 43 35 58 3.80 4.00 4.20 4.40 4.60 I I, - 01 ■ ■ i ■ ■ ■ ■ i ■ ■ ' ■ i ■ ■ ---------- TI m/z 100.10 97.84% miz-> 10 20 30 40 50 60 70 80 90 100 Abundance #111040: Methylene Chloride 49 84

5000 3.80 4.00 4.20 4.40 4.60 35 m/z 84.00 81.48% 01 I IIaIs 14 28 ,31, 1 . ■ -.............. n/z-> 10 20 30 40 50 60 70 80 90 100 Abundance #12327: Methylene Chloride 49 84 3.80 4.00 4.20 4.40 4.60 5000 m/z 49.10 71.30%

14 24 29 35 41 i , 70 01 > < i ■ * • ■ i ‘ ' i * । i I...... 1 miz-> 10 20 30 40 50 60 70 80 90 100 Abundance #42757:1 H-Imidazole-2-methanol ■ i ■ ■ ■ • i 1 • ■ ■ i 1 ‘ i • ' 93 3.80 4.00 4.20 4.40 4.60 m/z 43.10 34.26% 5000 41 69 81 —36 , 53 0 ■ i ‘ ■ +—... P. ..... Jl I............. i ' ■ ■ ■ i n/z-> 10 20 30 40 50 160 70 80 90 100 3.80 4.00 4.20 4.40 4.60

LB.D 052202.M Wed May 22 12:03:16 2002 Page 11

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