GCMS blank analysis results, June 5 2002

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Laboratory report showing non-detect levels of volatile organic compounds in a GCMS blank sample analyzed on June 5, 2002.

NYC-WTC_000015496–000015523

Folder label: “GCMS X 6/4/02 A 6/4/02”

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NYC 9/11 Public Portal Document Library Search Compound Report Data File C:\MSDCHEM\l\DATA\060402\604LB.D Vial: 3 Acq On 4 Jun 2002 5:29 pm Operator: McLean Sample 6/4 Inst : Instrumen Mise Multiplr: 1.00 MS Integration Params: LSCINT.e Quant Method : C:\MSDCHEM\1\METHODS\060302.M (Chemstation Integrator) Title : 508 Modified GC/MS scan Library : C:\DATABASE\NIST98.L ********************************************************************* Peak Number 10 Methylene Chloride Concentration Rank 16 R.T. EstConc Area Relative to ISTD R.T. 4.78 0.31 ug/L 151896 1,4-dichlorobenzene-d4 9.90

Hit# of 5 Tentative ID MW MolForm CAS# Qual 1 Methylene Chloride 84 CH2C12 000075-09-2 12 2 Methylene Chloride 84 CH2C12 000075-09-2 9 3 Methylene Chloride 84 CH2C12 000075-09-2/9 4 Methylene Chloride 84 CH2C12 000075-09-2 9 Abundance Scan 290 (4.783 min): 604LB.D (-288) (-) m/z 51.00 100.00% 51 48

5000 35 41 82 86

miz-> 01 “ i ■' ■ ■ i11' ■ i''' ‘ i ■ ■ ‘' i ■ ■'' i • • ‘ ■ 5 ’ I + 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 mmmmmm ... 4.40 m/z 4.60 48.05 4.80 5.00 78.38% 5.20

Abundance #111040: Methylene Chloride 49 84 ""MMaaJ=MAA.M. 5000 ' i 1 ' ' ■ i 1 1 1 1 I ' 1 ■' 1 I ' 1 ' 1 1 1 ' 4.40 4.60 4.80 5.00 5.20 35 m/z 49.10 74.45% 88

miz-> 14 2528 32 38441 01TTTH -rr ,-■ > i < f > r l > । > > > 111 ft > i H 70 +2 TITTT/ m rr1 1111! 11111111111 I ।' I ■''' I" ■ 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #111039: Methylene Chloride 49 84 4.40 4.60 4.80 5.00 5.20 5000 m/z 81.90 36.86%

88 O+ Til ■ i < i | I I ! I | I I I I | I I I I | I 2831 3538 43 1 ! ! | I I ! ritt TTT’ ! 1 ! | ! , 52 5“7uu—67 T 71 77 . —— mmmnmgmonont m/z—> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #111041: Methylene Chloride 49 4.40 4.60 4.80 5.00 5.20 m/ z 35.10 32.68% 84 5000 MMwN "WMMnw 46 | 2629 41 88 0 "PWpHH# ,2 I 59 65 73 77 1 • ■ i ■ ■ ‘ ■ i" ‘11 “ • ■ i ■'1' i ■" ■ i ■ •1 n/z-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 4.40 4.60 4.80 5.00 5.20

604LB.D 060302.M Wed Jun 05 12:28:48 2002 Page 13

NYC-WTC_000015512

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NYC-WTC_000015512Source: NYC Law Department, mirrored locally

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GCMS blank analysis results, sample AE11799, May 2002 · Box DEP Box 15

NYC-WTC_000012751

Gas chromatography-mass spectrometry blank analysis for sample AE11799 showing results below method reporting limits for semivolatile organic compounds, dated May 28, 2002.

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