GCMS comments for sample AD28900, Dec 16 2001

Machine-extracted title · confidence 90%

Lab report noting bis(2-Ethylhexyl) Sebacate detection and potential laboratory contamination in a water sample.

NYC-WTC_000035755–000035764

Folder label: “GCMS X 11/28/01 A 12/7/01”

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NYC 9/11 Public Portal Document

Library Search Compound Report

Data File C:\HPCHEM\1\DATA\DEC0 701\28900.D Vial: 5 Acq On 7 Dec 2001 6:50 pm Operator: 209 GALOS Sample 11/28 gc/ms scan Inst : GC/MS 209 Mise Multiplr: 1.00 MS Integration Params: LSCINT.P Quant Method : C:\HPCHEM\1\METHODS\GCMS1126.M (RTE Integrator) Title : 209 625/TCLP calibration table Library : C:\DATABASE\NBS75K.L ********************************************************************* Peak Number 1 N-Ethylformamide Concentration Rank 2

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

7.60 2.20 ug/1 481996 1,4-Dichlorobenzene-d4 11.67

Hit# of 5 Tentative ID MW MolForm CAS# Qual

1 N-Ethylformamide 73 C3H7NO 000627-45-2 9 2 Silane, tetrame yl- 88 C4H12Si 000075-76-3 9 3 1,3-Dioxolane,/ 2-(3-bromo-5,5,5-tri 352 C10H16BrC13O2 000000-00-0 9 4 1,3-Dioxolane, 2-methyl - 88 C4H802 000497-26-7 7 Abundance Scan 279 (7.603 mln): 28900.D (-) m/z 73. OP 100.00% 73

5000- 43 IInnnnooR 87 7.20 7.40 7.60 7.80 8.00 38, 1 50 55 . 67,1 , 103 1 ■ i ■ ■ ' ' i ■ I ■ ‘ ' TIT T’r •i • ■ •' I1 * ■ ■ i 1 TT । . i . < । ri . t । । . i , । । . m/z 43.05 2 7.75% m/z-> 10 20 30 40 50 60 70 80 90 100 110 120 Abundance #292: N-Ethylformamide 30 73

5000 1 [ ‘ • TTT i r /1 . . . . I . Trrurr 58 7.20 7.40 7.60 7.80 8.00 44 m/z 41.05 9.90% 15 — i ' • ■ • i ‘ 1 ■ ■ i • ■ ‘ • i • ■ ■ • i ■ • ■ • i 1 • ■ ■ i ■ m/z-> 10 20 30 40 50 60 70 80 90 100 110 120 Abundance #845; Silane, tetramethyl- 73 Trr 7.20 7.40 7.60 7.80 8.00

L. 5000 m/z 44.95 9.21% 45 15 31 55 88 ■ ■ i • • ■ ■ i ■ PIT Pmp • i • • • ■ P 1 • i l • • > • | • • • • । » I • mlz-> 10 20 30 40 50 60 70 80 90 100 110 120 Abundance #49423:1,3-Dioxolane, 2-(3-bromo-5,5,5-trichloro-2,2-dimet I r 111 73 7.40 7.60 7.20 7.80 8.00 m/z 71.0p i6.49%

miz-> 5000

36 i I 45 55 ■ ■ i • • • ■ i • ■ ■ ■ i ■ • 1 ‘ 1 1 1 1 । । i i' । । ।

10 20 30 40 50 60 67, —r <h * 70 109115 • 1 • • 1 • i • • > • i • • • • I * • • • i • • 80 90 100 110 120 1 i • • ■ 1 1 ' 7.20 7.40 L ■ i . ■ । r। r. . । 7.60 7.80 8.00 .

28900.D GCMS1126.M Tue Dec 11 16:10:40 2001 Page 1

NYC-WTC_000035762

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NYC-WTC_000035762Source: NYC Law Department, mirrored locally

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GCMS comments for sample AD28861, Dec 17 2001 · Box DEP Box 22

NYC-WTC_000035745

Laboratory notes indicating re-extraction is required due to low recovery and potential contamination.

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