GCMS blank analysis results, sample AE10809, May 2002

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Gas chromatography-mass spectrometry blank analysis conducted May 17, 2002 testing for semivolatile organic compounds with all results below method reporting limits.

NYC-WTC_000045936–000045963

Folder label: “GCMS X 5/7/02 A 5/15/02”

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NYC 9/11 Public Portal Document

Data File : C:\MSDCHEM\1\DATA\051402\0507LB.D Vial : 16 Acq On : 15 May 2002 2:34 am Operator: Mclean Sample : 5/7 kb Inst : Instrumen Mise : Multiplr: 1.00 MS Integration Params: LSCINT.e

Quant Method C:\MSDCHEM\1\METHODS\050102.M (Chemstation Integrator) Title ■ 508 Modified GC/MS scan Library C:\DATABASE\NIST98.L

Peak Number 4 Cyclotetrasiloxane, octamet.. Concentration Rank 8

R.T. EstConc Area Relative to ISTD R.T.

9.25 1.59 ug/L 1077520 1,4-Dichlorobenzene-d4 9.93

Hit# of 5 Tentative ID MW MolForm CAS# Qual 1 Cyclotetrasiloxane, octamethyl- 296 C8H24O4Si4 000556-67-2 86 2 7H-Dibenzo[b,g]carbazole, 7-methyl- 281 C21H15N 003557-49-1 64 3 Cyclotetrasiloxane, octamethyl- 296 C8H24O4Si4 000556-67-2 47 4 Benzoic acid, 4-methyl-2-trimeth... 296 C14H2403Si2 1000153-59-3 45 Abundance Scan 1050 (9.249 min): 0507LB.D (-1035) (-) m/z 281.00 100.00% 281

5000 ... .... R____ 900 9.20 9.40 9.60 45 59 73 103 119’33147 163177 123297 235249 265 m/z 282.10 27.19% 0 i । i i i i । i i i irmrn . . f । । । । i । 'i । । । । *1d*’*1y*u* 1 . i । ■. r . . । > । . । । . । . . । ’ r. |"4TTT /z—> 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Abundance #97367: Cyclotetrasiloxane, octamethyl- 281

5000 ___________ __________ । । । । । । । । । । i-1 II" । i-1 |~-i । ।

9.00 9.20 9.40 9 60 m/z 283.00 18.29% 15 29 45 59 73 1191331471 63177191 227221 235249 265 96 0- 11uPB1000——090—p—0T TI i । "l / । v । । ‘i n 7 । । i' '| i i" i । । 1T । ' I 1 iii 1 ii । । ii i i । +295— m/z--> 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Abundance #97365: 7H-Dibenzo[b,g]carbazole, 7-methyl- 281 __ ------ 9.00 9.20 9.40 9.60 5000 m/z 193.00 11.09%

266 39 63 86 100 119133147 163 187 213 237 252 J 0 i । i i i । । । i i । । । ii । । । । । । । । । । " ii I*। । ii r । p । i n । । । । । । n n j। । । i l i1 r| । । l। | To । TTIUt m/z-> 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 Abundance #128142: Cyclotetrasiloxane, octamethyl- .................. 1 1YI1VUI / .................... ll I I I I I I I I 1l I I 281 9.00 9.20 9.40 9.60 m/z 133.00 10.87% 5000

25 51 73.L... f 87 .. ।103 119133147 1 63177 193207221p ... । 235249 265In. —T , 299 — .... — - T. - " * । • . 4 -111- । 211 III" O-T r i " 1 ■ ir' •11 ’ 4 ' "I'' /z-> 0 20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 9.00 9.20 9.40 9.60

0507LB.D 050102.M Thu May 16 12:35:50 2002 Page 7

NYC-WTC_000045946

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