GCMS blank analysis results for sample AE11417, May 2002

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Laboratory report showing non-detect levels for 15 volatile organic compounds in a GCMS method blank processed on May 23, 2002.

NYC-WTC_000025347–000025358

Folder label: “GCMS X 5/16/02 A 5/20/02”

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NYC 9/11 Public Portal Document

Library Search Compound Report Data File : C : \MSDCHEM\ 1 \DATA\ 052002\516LBL. D Vial: 4 Acq On : 20 May 2002 3:44 pm Operator: Mclean Sample : 5/16 eh Inst Instrumen Mise Multiplr: 1.00 MS Integration Params: LSCINT.e Quant Method : C:\MSDCHEM\l\METHCDS\050102.M (Chemstation Integrator) Title : 508 Modified GC/MS scan Library : C:\DATABASE\NIST98.L Peak Number 2 2-Pentanone, 4-hydroxy-4-me... Concentration Rank 1 R.T. EstConc Area Relative to ISTD R.T.

5.96 13.24 ug/L 9760980 1,4-Dichlorobenzene-d4 9.93

Hit# of 5 Tentative ID MW MolForm CAS# Qual

1 2-Pentanone, 4-hydroxy-4-methyl- 116 C6H1202 000123-42-2(90 2 2-Pentanone, 4 -hydroxy-4 -methyl- 116 C6H12O2 000123-42-2 72 3 2-Pentanone, 4-hydroxy-4-methyl- 116 C6H1202 000123-42-2 64 4 Acetic acid, 1,1-dimethylethyl e... 116 C6H1202 000540-88-5 36 Abundance Scan 490 (5.958 min): 516LBL.D (-485) (-) m/z 43.10 100.00% 43

5000 59 ........................ ............................... 101 67 73 83 88 , | 560 5.80 6.00 6.20 6.40 ol ...................... 38,1 +48,53+ 1 I ■ ■ r ■ i 1 1 1 ■ i 1 ' ' 1 i r ■ ■ 1 i 1 1 ' ■ i 1 m/z 59.10 36.49% m/z-> 10 20 30 40 50 60 70 80 90 100 110 Abundance #109755: 2-Pentanone, 4-hydroxy-4-methyl- 43

5000 59 5 60 5.80 6.00 6.20 6.40 m/z 58.10 23.23% 15 31 101

miz-> 01 10 | 20 26,, 30 40 38, 50 +53+ 60 । | r ' ■ ■ । 70 80 83 , | ■ 1 । '' । । । I 1 1 1 I I ' 1 i ' I । 90 100 110 Abundance #109756:2-Pentanone, 4-hydroxy-4-methyl- 43 5 60 5.80 6.00 6.20 6.40 5000 59 m/z 101.10 14.04%

......................... 93 83 — 93 101 , 0 1IH4+ -*d—0n//n/nm///0—/1/I m/z-> 10 20 30 40 50 60 70 80 90 100 110 Abundance #5851:2-Pentanone, 4-hydroxy-4-methyl- 43 560 5.80 6.00 6.20 6.40 m/ Z 41.10 6.29%l 5000 59 — 101 .... 1 Tik,1 38,1 1 1 । 1 1 1 1 । 1 127,32 0 , 48 53, 67 72 77 83 91 96, | TTPprrTtrt 1 ' r> ' II I 1 1 1 1 i ' 1 ■ 1 i ' ' 1 1 i ' ■ ' 1 i 1 1 ' ' 1 1 m/z-> 10 20 30 40 50 60 70 80 90 100 110 5.60 5.80 6.00 6.20 6.40

516LBL.D 050102.M Wed May 22 15:57:27 2002 Page 4

NYC-WTC_000025354

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NYC-WTC_000025354Source: NYC Law Department, mirrored locally

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