GCMS analysis sample AD26534, 1,1,2,2-Tetrachloroethane, Dec 2001

Machine-extracted title · confidence 95%

Mass spectrometry analysis of sample AD26534 detected 1,1,2,2-Tetrachloroethane at 2.9 ug/L with 93% fit confidence, Dec 16, 2001.

NYC-WTC_000031801–000031813

Folder label: “GCMS X 11/6/01 A 12/7/01”

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NYC 9/11 Public Portal Document

Library Search Compound Report

Data File C:\HPCHEM\l\DATA\DEC0701\26534.D Vial: 9 Acq On 8 Dec 2001 1:24 am Operator: GALOS Sample gc/ms unknown 11/6 Inst : GC/MS Ins Mise Multiplr: 1.00 MS Integration Params: LSCINT.P

Quant Method : C:\HPCHEM\1\METHODS\NP112701.M (RTE Integrator) Title : 208 625/TCLP calibration table Library : C:\DATABASE\NBS75K.L ********************************************************************* Peak Number 1 Hydrogen azide Concentration Rank 3

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

5.05 5.38 ng/uL 1236660 1,4-Dichlorobenzene-d4 11.88

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

1 Hydrogen azide 43 HN3 007782-79-8 4 2 Acetic acid; anhydride 102 C4H603 000108-24-7 2 3 Acetic cid, anhydride 102 C4H603 000108-24-7 2 4 2-Prop .one, 1 - hydroxy - 74 C3H6O2 000116-09-6 2 Abundance Scan 23 (5.051 min): 26534.D (-) m/z 43.00 100.00% 43 5000 — 11' ■11111 ■ ■ ।1 ■ ■' i11 4.90 5.00 5.10 5.20 5.30 5.40 5.50 0+ TT’ p-r. rp . i i । . . 11 । 36 401 , 49 11 • • • • । 60 87 • I • > > > I > • ■»111111 ■ • • • i" ■ ■ i ’ ■ ■ ■ i ■ ■ ■ ‘ I ■ • ■ ■ i ■ m/z 42.05 6.18% m/z-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #33: Hydrogen azide ‘ 43

5000 15 TT TTTTTrm 4.90 5.00 5.10 5.20 5.30 5.40 5.50 29 m/z ,44.00 2.92% TT-TTf 'r'"i" TTT T" T‘ ' i' •'' i " " r " ■ i' " ' i''' ■ r m/z-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #63470: Acetic acid, anhydride 43 I'1'1I r ■1' r ' ■ ■ i 4.90 5.00 5.10 5.20 5.30 5.40 5.50

M 5000 m/z 41.05 1.45% 15 ■I .......... 29 । 60 87 TT’ p-m | ।11. m/z-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #1680: Acetic acid, anhydride 4j3 4.90 5.00 5.10 5.20 5.30 5.40 5.50 | m/z ,45.00 1.15% 5000

m/z--> ■ r ■'' r 5 2.9 p-n-rp-n-r TN TTTT .................. 60 ............. 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 ...... 87 ......... .......... A 4.90 5.00 5.10 5.20 5.30 5.40 5.50

26534.D NP112701.M Thu Dec 13 11:24:10 2001 Page 1 NYC-WTC_000031809

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NYC-WTC_000031809Source: NYC Law Department, mirrored locally

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Same-box records

GCMS comments for sample AD26532 detecting 1,1,2,2-Tetrachloroethane · Box DEP Box 21

NYC-WTC_000031762

Analysis report dated December 16, 2001, identifying 1,1,2,2-Tetrachloroethane at 0.80 ug/L in sample AD26532.

1 shared topics · Same agency, volume and box · similarity 0.999