GCMS blank analysis results for sample AE07484, May 2002

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Laboratory report of a GCMS blank analysis (Sample AE07484) conducted on May 2, 2002, checking for background contamination.

NYC-WTC_000044245–000044252

Folder label: “GCMS X 4/23/02 A 4/26/02”

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Quantitation Report (QT Reviewed)

Data File : C:\HPCHEM\1\DATA\APR2502\LBB.D Vial: 3 Acq On : 26 Apr 2002 7:27 pm Operator: Sample : gc/ms scan 4/23 Inst : 209 Mise : Multiplr: 1.00 MS Integration Params: GOOFY.P Quant Time: May 1 11:20 2002 Quant Results File: GCMS0412.RES

Quant Method : C:\HPCHEM\1\METHODS\GCMS0412.M (RTE Integrator) Title : 209 625/TCLP calibration table Last Update : Thu Apr 25 15:21:43 2002 Response via : Initial Calibration DataAcq Meth : GCMS0412

Internal Standards R.T. Qlon Response Cone Units Dev(Min)

1) 1,4-Dichlorobenzene-d4 12.21 152 348680 20.00 ug/1 -0.03 10) Naphthalene-d8 15.84 136 1257310 20.00 ug/1 -0.04 17) Acenaphthene-diO 21.14 164 713514 20.00 ug/1 -0.03 30) Phenanthrene-diO 25.59 188 1043897 20.00 ug/1 -0.03 39) Chrysene-dl2 33.64 240 619137 20.00 ug/1 -0.04 45) Perylene-dl2 37.87 264 366909 20.00 ug/1 -0.05

System Monitoring Compounds 2 8) TCMX 23.28 209 31584 8.75 ug/L -0.05 Spiked Amount 10.000 Recovery = 87.50% 38) 2,4-DDD 0.00 235 0 0.00 ug/mL Spiked Amount 5.000 Recovery = 0.00%

Target Compounds Qvalue 2) N-nitroso-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-Chloropropan 0.00 45 0 N.D. 8) N-Nitroso-di-n-propylamine 0.00 70 0 N.D. 9) Hexachloroethane 0.00 117 0 N.D. 11) Nitrobenzene 0.00 77 0 N.D. 12) Isophorone 0.00 82 0 N.D. 13) bis(2-Chloroethoxy)methane 0.00 93 0 N.D. 14) 1,2,4-Trichlorobenzene 0.00 180 0 N.D. 15) Naphthalene 15.90 128 197 N.D. 16) Hexachlorobutadiene 0.00 225 0 N.D. 18) Hexachlorocyclopentadiene 0.00 237 0 N.D. 19) 2-Chloronaphthalene 0.00 162 0 N.D. 20) Dimethylphthalate 0.00 163 0 N.D. 21) 2,6-Dinitrotoluene 0.00 165 0 N.D. 22) Acenaphthylene 0.00 152 0 N.D. 23) Acenaphthene 0.00 153 0 N.D. 24) 2,4-Dinitrotoluene 0.00 165 0 N.D. 25) Diethylphthalate 22.62 149 519 N.D. 26) 4-Chlorophenyl-phenylether 0.00 204 0 N.D. 27) Fluorene 0.00 166 0 N.D. 29) Azobenzen/ 1,2-Diphenylhyd 0.00 77 0 N.D. 31) N-Nitrosodiphenylamine 0.00 168 0 N.D. 32) 4-Bromophenyl-phenylether 0.00 248 0 N.D.

(#) = qualifier out of range (m) = manual integration LBB.D GCMS0412.M Wed May 01 11:21:09 2002 Page 1

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