GCMS blank analysis for sample AE00555, Jan-Feb 2002

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Laboratory report showing GCMS blank analysis results for sample AE00555 conducted between January 29 and February 1, 2002.

NYC-WTC_000051512–000051530

Folder label: “GCMS X 1/9/02 A 1/29/02”

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NYC 9/11 Public Portal Document

Library Search Compound Report Data File : C:\MSDCHEM\1\5973N\02JAN29\0109B.D Vial: 1 Acq On : 29 Jan 2002 10:31 am Operator: Sample : lab blank 1/9 Inst : Instrumen Mise : January 29, 2002 Multiplr: 1.00 MS Integration Params: LSCINT.P Quant Method : C:\MSDCHEM\1...\SCAN508.M (RTE Integrator) Title : 508 scan method Library : C:\DATABASE\WILEY7N. L Peak Number 2 Propane, 1,l-dimethoxy-2-me.. Concentration Rank 10 R.T. EstConc Area Relative to ISTD R.T.

3.91 0.05 ug/L 21080 1,4-Dichlorobenzene-d4 9.71

Hit# of 5 Tentative ID MW MolForm ■ CAS# Qual

1 Propane, 1,1-dimethoxy-2-methyl- 118 C6H14O2 041632-89-7 9 2 ISOBUTYRALDEHYDE, DIMETHYLACETAL... 118 C6H14O2 000000-00-0 9 3 ISOBUTYRALDEHYDE, DIMETHYLACETAL... 118 C6H14O2 000000-00-0 9 4 Propane, l,l-dimethoxy-2-methyl-... 118 C6H14O2 041632-89-7 9 Abundance Scan 47 (3.910 min): 0109B.D (-) m/z 75.10 100.00% 75

5000 87 "I 55 3.60 3.80 4.00 4.20 ..... 111101141 ■ 1111 ■ i' ■ ■ ■ i'1 TTIUTII ITTTTrT mT m/z 87.10 33.34% /z-> 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #17846: Propane, 1,1-dimethoxy-2-methyl- 75

5000 ■ ■ ■ i ' • > ■ i • ■ 1 ■ i > ■ ‘ 1 i ■ ■ ■ • । 87 3.60 3.80 4.00 4.20 55 m/z 55.10 16.71% 47 31 431 I 59 71 11 ■ ■ ■ • i • • ■ ■ 11 ■ > ■ । ■ • • ■ ।1 > i ■ | • I ■ ■ i ■ • > • | > ■111 ■ ■ ■ ■ i ■ ...... 'I' ■ ■ i ■ - ■ ■ i • ■ m/z-> 20 25 30 35 40 45 50 65 70 75 80 85 90 95 55 60 Abundance #17847: ISOBUTYRALDEHYDE, DIMETHYLACETAL $$ 1,1-Dimethoxyi... 75 3.60 3.80 4.00 A —4.20 5000 m/ z 47.00 15.65%

31 47 55 87 N 59 43 । 71 T-p-rT-T-p-r+Tj-rir ' 11 " 11 " 1111 mPP ...... ... TTT । < i ■ । ■ i ■ •

m/z-> 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #17849: ISOBUTYRALDEHYDE, DIMETHYLACETAL $$ 1,1-Dimethoxyi... TT 75 3.60 3.80 4.00 4.20 m/z 41.10 10.92% 5000 87 55

rn/z—> 11 ■ < ■ ■ । 20 25 29 ■ 111 ■ ■ ■ । 30 35 41 47 ■111 < I ' ।I'11 ■ ■ i ■ ■ ■ ■ I ■ ■ 59 40 45 50 55 ■11' ■ ■ ■ i ■

60 65 - 71

70 75 T-p-r-r-r-p- 80 85 11111' i ■ 90 95 A. A/N. ‘‘11**1 * I’‘ ‘I’** ' I ‘ ’ ’ 1 I 3.60 3.80 4.00 4.20

109B.D SCAN508.M Wed Jan 30 09:02:32 2002 Page 4

NYC-WTC_000051518

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NYC-WTC_000051518Source: NYC Law Department, mirrored locally

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GCMS blank results for sample AE00830, Feb 2002 · Box DEP Box 28

NYC-WTC_000052029

Laboratory report showing GCMS blank analysis of sample AE00830 with compounds below detection limits.

1 shared topics · Same agency, volume and box · similarity 0.997