WTC sample cover sheet, Dec 28 2001

NYC 9/11 Public Portal Document ¼UU11LLLdL1Ui1 nepJUrL

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Data File : C:\HPCHEM\1\DATA\01DEC28\1228C10A.D Vial: 8 Acq On : 28 Dec 2001 6:08. pm Operator: 206-BH Sample : cal 10 Inst : GC/MS Ins Misc Multiplr: 1.00 MS Integration Params: LSCINT.P Quant Time: Dec 31 9:33 2001 Quant Results File: HP121001.RES

Quant Method : C:\HPCHEM\1\METHODS\HP121001.M (RTE Integrator) Title : VOCs BY EPA METHOD 524 Last Update : Mon Dec 31 09:33:20 2001 Response via : Initial Calibration DataAcq Meth : HP121001

Internal Standards R.T. Qlon Response Conc Units Dev(Min) ------------------------------------------------------------------------- 1) 1,4-DIFLUOROBENZENE 14.46 114 541336 5.00 ug/L 0.10 22) CHLOROBENZENE-D5 21.05 117 646936 5.00 ug/L 0.09 50) 1,4-DICHLOROBENZENE-D4 26.21 152 505202 5.0.0 ug/L 0.10

System Monitoring Compounds 2) 1,2-DICHLOROETHANE-D4 13.67 65 217962 6.11 ug/L 0.09 Spiked Amount 5.000 Recovery = 122.20'6 3) 4-BROMOFLUOROBENZENE 23.64 174 269765 6.49 ug/L 0.10 Spiked Amount 5.000 Recovery = 129.800 23) TOLUENE-D8 17.78 98 805364 4.70 ug/L 0.10 Spiked Amount 5.000 Recovery = 94.000

Target Compounds Qvalue 4) DICHLORODIFLUOROMETHANE 4.50 85 133147 7.54 ug/L 98 5) CHLOROMETHANE 5.02 50 152619 13.89 ug/L 99 6) VINYL CHLORIDE 5.17 62 203471 18.63 ug/L 95 7) BROMOMETHANE 6.09 94 123503 12.93 ug/L 96 8) CHLOROETHANE 6.23 64 101826 13.60 ug/L 96 9) TRICHLOROFLUOROMETHANE 6.77 101 286782 12.09 ug/L 98 10) ACETONE 7.70 43 41423 11.41 ug/L 97 11) 1,1-DICHLOROETHENE 8.04 61 379604 12.34 ug/L 94 12) METHYLENE CHLORIDE 9.02 49 383538 12.86 ug/L 92 13) METHYL TERT BUTYL ETHER 9.31 73 411531 10.46 ug/L 99 14) TRANS-1,2-DICHLOROETHENE 9.67 61 388176 11.63 ug/L 92 15) 1,1-DICHLOROETHANE 10.55 63 499868 12.01 ug/L 99 16) 2-BUTANONE (MEK) 11.37 43 63762 9.94 ug/L 96 17) 2,2-DICHLOROPROPANE 11.75 77 400713 11.68 ug/L 99 18) CIS-1,2-DICHLOROETHENE 11.83 96 259553 11.13 ug/L 90 19) CHLOROFORM 12.17 83 500670 12.61 ug/L 98 20) BROMOCHLOROMETHANE 12.55 49 233237 12.38 ug/L 90 21) 1,2-DICHLOROETHANE 13.88 62 329872 12.34 ug/L 100 24) 1,1,1-TRICHLOROETHANE 13.06 97 419204 10.55 ug/L 98 25) 1,1-DICHLOROPROPENE 13.38 75 384058 9.79 ug/L 98 26) CARBON TETRACHLORIDE 13.62 117 382370 11.31 ug/L 99 27) BENZENE 13.98 78 1045843 9.18 ug/L 98 28) TRICHLOROETHENE 15.24 95 285498 .9.35 ug/L 99 29) 1,2-DICHLOROPROPANE 15.60 63 291676 9.19 ug/L 99 30) DIBROMOMETHANE 16.25 174 104603 9.26 ug/L 96 31) BROMODICHLOROMETHANE 16.11 83 381511 10.43 ug/L 98 32) 2-CHLOROETHYL VINYL ETHER 16.60 63 88760 7.53 ug/L 97 33) Methyl iso-butyl ketone 16.67 58 44983 7.42 ug/L 95 ------------------------------------------------------------------------- (##) = qualifier out of range (m) = manual integration 1228C10A.D HP121001.M Mon Dec 31 09:34:11 2001 Page 1

NYC-WTC 000002791