GCMS blank analysis results for sample AE07484, May 2002

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Laboratory report of a GCMS blank analysis (Sample AE07484) conducted on May 2, 2002, checking for background contamination.

NYC-WTC_000044245–000044252

Folder label: “GCMS X 4/23/02 A 4/26/02”

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Data File : C:\HPCHEM\1\DATA\APR2502\LBB.D Vial: 3 Acq On : 26 Apr 2002 7:27 pm Operator: Sample : gc/ms scan 4/23 Inst : 209 Mise Multiplr: 1.00 MS Integration Params: LSCINT.P Quant Method : C:\HPCHEM\1\METHODS\GCMS0412.M (RTE Integrator) Title : 209 625/TCLP calibration table Library : C:\DATABASE\NBS75K.L ********************************************************************* Peak Number 1 2-Pentanone, 4-hydroxy-4-methy Concentration Rank 1

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

8.19 4.58 ug/1 427910 1,4-Dichlorobenzene-d4 12.21

Hit# of 5 Tentative ID MW MolForm CAS# Qual

1 2-Pentanone, 4 -hydroxy-4 -methyl- 116 C6H1202 000123-42-2 50 2 Acetic Acid, 1,1-dimethylethyl este 116 C6H1202 000540-88-5 33 3 Acetone 58 C3H60 000067-64-1 10 4 Butane, 1-ethoxy-________________ 102 C6H140 000628-81-9 9 Abundance ‘ Scan 343 (8.191 min): LBB.D (-) m/z 42.95 100.00% 43

59 5000 101 i | i i i i । > > । TTduv i | I T i i । i i 7.80 8.00 8.20 8.40 8.60 83 381 ++ 53 , । (■ ■ ■ ■ • i ■ ■ ■ ■ i ■1 • ■ > l 1 ' i 1 1 1 1 । m/z 59.05 51.37% m/z-> 10 20 30 40 50 60 70 80 90 100 110 Abundance #64275: 2-Pentanone, 4-hydroxy-4-methyl- 43

1 j" T I I r "J i i I 4 | PPP I I I । i r 5000 59 7.80 8.00 8.20 8.40 8.60 m/z 100.95 21.86% 15 31 101 '........ I, 83 11i ■ ■ i 1 ■ 1 TTTTt i ‘ ' 1 1 i ' 1 1 ■ i ■'1 ' 1 i 1 m/z-> 10 20 30 40 50 60 70 80 90 100 110 Abundance #3292: Acetic acid, 1,1-dimethylethyl ester 43 I I I I I I I I I I I I I II I I I I I I I I I

7.80 8.00 8.20 8.40 8.60 5000 57 m/z 58.05 18.11% 101 15 I 27r I ' 11 1 1 1 ' 11 I PT ' i 1 1 r ' 1 ' r-|—rf—' ' | ' 1 1 1 | ' 1 1 | ‘ ' 1 I m/z-> 10 20 30 40 50 60 70 80 90 100 110 Abundance #62322: Acetone 43 7.80 8.00 8.20 8.40 8.60 m/z 41.05 7.43%

5000 58 27 i ■ 1 1 ■ i 1 1' '11 — ' ' 50 ' ~I I I I I I I I i I I t I I I I I I J I I I I I I > i ■ > 1 - i ■ ■ ■ - i - ■ ■ ■ । . ■ ■ ■ । ■ m/z-> 10 20 30 40 60 70 80 90 100 110 •7.80 8.00 8.20 8.40 8.60

LBB.D GCMS0412.M Thu May 02 05:34:53 2002 Page 1

NYC-WTC_000044251

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