GCMS analysis report, sample AE07520, April 2002

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Laboratory results for volatile organic compounds in a GCMS blank sample analyzed on April 2-3, 2002.

NYC-WTC_000047159–000047176

Folder label: “GCMS X 4/2/02 A 4/3/02”

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Data File C:\MSDCHEM\l\DATA\020403\0402LB.D Vial: 10 Acq On 3 Apr 2002 5:21 pm Operator: Nefliu Sample 04/02 lab blk Inst Instrumen Mise Multiplr: 1.00 MS Integration Params: LSCINT.e Quant Method : C:\MSDCHEM\1\METHODS\SCAN020403.M (Chemstation Integrator) Title : Method 508 GC/MS Scan Library : C:\DATABASE\nist98.1

Peak Number 9 s-Triazolo[4,3-a]pyrazine, . Concentration Rank 2

R.T. EstConc Area Relative to ISTD R.T. 41.69 0.75 ug/1 551745 Perylene-dl2 42.30 Hit# of 5 Tentative ID MW MolForm CAS# Qual

1 s-Triazolo[4,3-a]pyrazine, 3,8-d... 148 C7H8N4 019848-78-3 5 2 4-Dehydroxy-N-(4,5-methylenediox... 298 C16H14N2O4 1000111-66-9 4 3 4-Methyl-2-trimethylsilyloxy-ace... 222 C12H18O2Si 1000147-65-1 3 4 3H-Indazol-3-one, 1,2-dihydro-1-... 148 C8H8N2O 001006-19-5 2 Abundance Scan 6572 (41.693 min): 0402LB.D (-6568) (-) m/z 148.10 100.00% 148

40 207 5000 355 1 1 i ' ■ ■ ' i 281 41.40 41.60 41.80 42.00 0+ 222 m/z 207.00 53.76%

A 1’1177 I ' 1 " I ' I' ' 1 1 I i'1 ■' i11 1 I' 1' 1 11 1' 1 1 1 1 1 1 I 1 1 '' I' '' 1 |1 '' H 1 m/z-> 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 Abundance #66365: s-Triazolo[4,3-a]pyrazine,. 3,8-dimethyl- 148

I. 53

80 5000 41.40 41.60 41.80 42.00 106 . m/z 40.10 53.10% 0 ... |....... .1.................................................. "T’av’’’ | | ■ I I I | I I I IT’t >. | I . r I | I I I I | 1 1 I 1 | I I I 1 | I n/z-> 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 Abundance #84754: 4-Dehydroxy-N-(4,5-methylenedioxy-2-nitrobenzylide... 105 207

41.40 41.60 41.80 42.00

A 5000 77 m/z 355.00 34.15% 135 281 51 , 161 178

m/z-> 0+ —4 Aae T 44 ,4 224 252 , 298 — # ' i

40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 1 ITui I"11 "'11 Ifttu ■ ■ ।1 ■ ■ ■ । -1 ■ ■ ■ ■ 1111 < i ■

Abundance #84834: 4-Methyl-2-trimethylsilyloxy-acetophenone ■ ■ । ■ 11 । ■ ■ ■ ■ ।............ । ' 1 207 41.40 41.60 41.80 42.00 m/z 281.05 13.40% 5000

43 73 149165 189 O+r H || " r ' ' 1 I I I 1 222 । । i ■ > | f । > > । > । . r । > r । > । ■ ’ . । . ’ ’I’’* ’T61’t । । <>> । > । I I | I I I I | । । । I | I ■ ■ i । ■ n/z-> 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 41.40 41.60 41.80 42.00

0402LB.D SCAN020403 .M Thu Apr 04 10:14:26 2002 Page 11

NYC-WTC_000047172

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