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GCMS blank analysis results, May 22, 2002

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Laboratory report showing blank sample analysis for volatile organic compounds using gas chromatography-mass spectrometry on May 22, 2002.

NYC-WTC_000013049–000013076

Folder label: “GCMS X 5/21/02 A 5/21/02

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NYC 9/11 Public Portal Document

* ’ Quantitation Report (QT Reviewed)

Data File C:\MSDCHEM\1\DATA\052102\LB.D Vial: 10 Acq On 21 May 2002 8:40 pm Operator: Mclean Sample Inst : Instrumen Mise Multiplr: 1.00 MS Integration Params: EVENTS.E Quant Time: May 22 12:02:07 2002 Quant Results File: 052202.RES Quant Method : C:\MSDCHEM\1\METHODS\052202.M (Chemstation Integrator) Title : 508 Modified GC/MS scan Last Update : Wed May 22 12:00:55 2002 Response via : Initial Calibration DataAcq Meth : 508SCAN

Internal Standards R.T. Qlon Response Cone Units Dev(Min) 1) 1,4-Dichlorobenzene-d4 9.90 152 5242858 40.00 ug/L 0.00 10) Napthalene-d8 13.40 136 20669734 40.00 ug/L -0.01 17) Acenapthalene-dlO 18.53 164 11333579 40.00 ug/L 0.00 29) Phenanthranene-dlO 22.91 188 17412674 40.00 ug/L 0.00 37) Chrysene-dl2 30.77 240 13802444 40.00 ug/L -0.04 43) Perylene-dl2 34.67 264 8585209 40.00 ug/L -0.02

System Monitoring Compounds 27) TCMX 20.51 209 2300172 38.40 ug/L 0.00 Spiked Amount 40.000 Recovery 96.00% Target Compounds Qvalue 2) n-nitros-dimethyl amine 0.00 74 0 N.D. 3) bis(2-Chloroethyl)ether 0.00 93 0 N.D. 4) 1,3-Dichlorobenzene 0.00 146 0 N.D. 5) 1,4-Dichlorobenzene 0.00 146 0 N.D. 6) 1,2-Dichlorobenzene 0.00 146 0 N.D. 7) 2,2'oxybis(1-Chloropropane 0.00 45 0 N.D. 8) N-nitroso-di-propylamine 0.00 70 0 N.D. 9) Hexachloroethane 0.00 117 0 N.D. 11) Nitrobenzene 0.00 77 0 N.D. 12) 1sophorone 0.00 82 0 N.D. 13) bis(2-Chloroethoxy) methan 13.40 93 1784 N.D. 14) 1,2,4-Trichlorobenzene 0.00 180 0 N.D. 15) Napthalene 0.00 128 0 N.D. 16) Hexachlorobutadiene 0.00 225 0 N.D. 18) 2-Chloronaphthalene 0.00 162 0 N.D. 19) Dimethylphthalate 0.00 163 0 N.D. 20) 2,6-Dinitrotoluene 0.00 165 0 N.D. 21) Acenapthylene 0.00 152 0 N.D. 22) Acenapthalene 0.00 153 0 N.D. 23) 2,4-Dinitrotoluene 0.00 165 0 N.D. 24) Diethylphthalate 20.11 149 22344 N.D. 25) 4-Chlorophenyl-phenylether 0.00 204 0 N.D. 26) Fluorene 0.00 166 0 N.D. 28) Azobenzene 20.50 77 35953 N.D. 30) Nnitrosodiphenylamine 20.51. 169 43320 N.D. 31) 4-Bromophenyl-phenylether 0.00 248 0 N.D. 32) Hexachlorobenzene 0.00 284 0 N.D. 3 3) Phenanthrene 0.00 178 0 N.D. 3 4) Anthracene 0.00 178 0 N.D. 35) Di-n-butylphthalate 25.05 149 258823 0.50 ug/L 99

(#) = qualifier out of range (m) = manual integration LB.D 052202.M Wed May 22 14:32:30 2002 Page 1

NYC-WTC_000013050

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