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GCMS comments for sample AD2653S detecting 1,1,2,2-Tetrachloroethane

Machine-extracted title · confidence 100%

Analysis report dated December 16, 2001, identifying 1,1,2,2-Tetrachloroethane at 3.4 ug/L in sample AD2653S.

NYC-WTC_000031814–000031830

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

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NYC 9/11 Public Portal Document

LSC Area Percent Report

Data File C: \HPCHEM\1\DATA\DEC0701\26535.D Vial: 10 Acq On 8 Dec 2001 2:19 am Operator: GALOS Sample gc/ms unknown 11/6 Inst : GC/MS Ins Mise Multiplr: 1.00 MS Integration Params: LSCINT.P

Method : C:\HPCHEM\1\METHODS\NP112701.M (RTE Integrator) Title : 208 625/TCLP calibration table Smoothing : OFF Filtering: 5 Sampling : 1 Min Area: 1 % of largest Peak Start Thrs: 0.2 Max Peaks: 100 Stop Thrs : 0 Peak Location: TOP

If leading or trailing edge < 100 prefer < Baseline drop else tangent > Peak separation: 5

Signal : TIC

peak R.T. first max last PK peak peak peak % of # min scan scan scan TY height area % max. total

1 5.050 20 23 33 rBV 809686 1723746 23.22% 3.523% 2 5.160 33 35 48 rVB3 84024 267594 3.61% 0.547% 3 6.472 175 178 187 rBV 38228 115937 1.56% 0.237% 4 6.582 187 190 200 rBV 33126 80160 1.08% 0.164% 5 6.701 200 203 207 rBV 42064 104771 1.41% 0.214%

6 6.820 213 216 225 rBV 34372 100761 1.36% 0.206% 7 7.205 251 258 268 rBV 2823027 5457311 73.52% 11.153% 8 7.856 325 329 346 rVB 1259770 2734894 36.84% 5.589% 9 9.369 489 494 500 rBV 294161 546320 7.36% 1.117% 10 9.617 516 521 534 rVB 304204 1031008 13.89% 2.107%

11 10.323 593 598 606 rBV 51284 107802 1.45% 0.220% 12 10.534 616 621 627 rBV 54768 120030 1.62% 0.245% 13 11.781 751 757 762 rVB2 37687 76957 1.04% 0.157% 14 11.882 762 768 778 rBV 2774415 5975870 80.51% 12.213% 15 14.505 1049 1054 1058 rBV 62022 111314 1.50% 0.227%

16 15.486 1155 1161 1179 rBV 3682446 7422706 100.00% 15.170% 17 17.650 1390 1397 1405 rVB 98187 183034 2.47% 0.374% 18 20.465 1698 1704 1708 rBV 57430 101174 1.36% 0.207% 19 20.759 1730 1736 1757 rBV 3560576 7372863 99.33% 15.068% 20 21.208 1781 1785 1794 rBV2 28342 77280 1.04% 0.158%

21 25.170 2208 2217 2229 rBV2 2987326 6657057 89.69% 13.605% 22 25.316 2229 2233 2241 rVB2 23748 76544 1.03% 0.156% 23 33.175 3084 3090 3110 rBV2 2254181 5179964 69.79% 10.586% 24 37.265 3528 3536 3552 rBV 1197518 3305875 44.54% 6.756%

Sum of corrected areas: 48930972

26535.D NP112701.M Thu Dec 13 11:24:49 2001

NYC-WTC_000031820

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NYC-WTC_000031820Source: NYC Law Department, mirrored locally

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