GCMS blank analysis results, June 11 2002

NYC 9/11 Public Portal Document Library Search Compound Report Data File : C:\MSDCHEM\l\DATA\0610022\LB.D Vial: 7 Acq On : 10 Jun 2002 3:54 pm Operator: Sample : gc/ms scan 6/7 Inst : Instrumen Mise : Multiplr: 1.00 MS Integration Params: LSCINT.e Quant Method : C:\MSDCHEM\1\METHODS\060302.M (Chemstation Integrator) Title : 508 Modified GC/MS scan Library : C:\DATABASE\NIST98.L Peak Number 15 Methylene Chloride Concentration Rank 10 R.T. EstConc Area Relative to ISTD R.T. 4.88 1.73 ug/L 1293860 1,4-di chlorobenzene-d4 9.89

Hit# of 5 Tentative ID MW MolForm CAS# Qual 1 Methylene Chloride 84 CH2C12 000075-09-2 40 2 Methylene Chloride 84 CH2C12 000075-09-2 8 3 Methylene Chloride 84 CH2C12 000075-09-2 4 4 Ethyl Chloride 64 C2H5C1 000075-00-3 4 Abundance Scan 307 (4.883 min): LB.D (-305) (-) m/z 49.10 200.00% 49 41

5000 83 . oo 1l. * ‘ I * * 1 * I I I I I I 1 1 4.60 4.80 5.00 5.20 37 m/z 41.05 68.66% 0- *111011100101011 —001—0303378 —p “ “ I *'1 ‘ I “1 * I “ r‘ I “ “ 11' “ I 1’1’11111 iz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #111040: Methylene Chloride 49 84

5000 4.60 4.80 5.00 5.20 35 m/z 83.00 34.86%

miz-> 14 2528 32 3841 70 olTRHHT■n-p-i i i 11 1 I 11 rii 1 I Ft i.| 11 11 11 152 ■ i • ■t•‘‘* i “ •11 ■1 ‘ ‘ j ‘*i■ ‘1 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 88 + Abundance #12327: Methylene Chloride 49 84 ' 4.60 4.80 5.00 5.20 5000 m/z 51.10 28.87%

88 0+ 1' i “ ‘ ■ i ■1114' i118 24 2831 353841 '" i ‘111 i'1111111111'111'11111 ,52 70 InmmmmmmammTT TITH H n/z-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #111039: Methylene Chloride ■ 1 ■ ■ i ' ■ ■ 1 i • • ' ‘ i ■ ■ ‘ ■ i ■ ■ ■ ■ 49 4.60 4.80 5.00 5.20 m/z 88.00 28.70% 84 5000 MMabowotd. 2831 3538 43 |) ,52 57 88 0 67 71 77 I fl . ! I ! 11 . I i i 11 I 71 i r-|i i i i 11 i ! 11 ■ 11 , H m/z-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 4.60 4.80 5.00 5.20

LB.D 060302.M Tue Jun 11 08:26:21 2002 Page 18

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