GC/MS blank analysis results, April 6 2002

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Laboratory report showing GC/MS blank analysis for Method 508 compounds with non-detectable levels.

NYC-WTC_000060333–000060339

Folder label: “GCMS X 3/20/02 A 4/6/02”

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NYC 9/11 Public Portal Document

Quantitation Report (QT Reviewed)

Data File C:\MSDCHEM\l\DATA\040502\LBB0405.D Vial: 21 ; Acq On 6 Apr 2002 10:31 am Operator: Bohlk Sample LB 3/20/02 Inst Instrumen Mise : Multiplr: 1.00 MS Integration Params: BENZO.P Quant Time: Apr 08 12:49:41 2002 Quant Results File: 5080402.RES

Quant Method C:\MSDCHEM\l\5973N\5080402.M (RTE Integrator) Title Quantitation For Method 508gcscan Last Update Mon Apr 08 06:47:22 2002 Response via Initial Calibration DataAcq Meth 508SCAN

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

1) 1,4-Dichlorobenzene-d4 9.46 152 923153 20.00 ug/L -0.01 10) Naphthalene-d8 12.93 136 4347807 20.00 ug/L -0.01 17) Acenaphthene-dlO 18.05 164 2532498 20.00 ug/L 0.00 29) Phenanthrene-dlO 22.41 188 3584861 20.00 ug/L -0.01 38) Chrysene-dl2 30.23 240 2505055 20.00 ug/L -0.02 44) Perylene-dl2 34.11 264 1377791 20.00 ug/L -0.01

System Monitoring Compounds 37) 2,4-DDD (SURR) 27.36 235 220411 6.19 ug/L 0.00 Spiked Amount 5.000 Recovery = 123.80%

Target Compounds Qvalue 2) N-nitroso-dimethyl amine 0.00 74 0 N.D. d 3) bis(2-chloroethyl) ether 0.00 93 0 N.D. 4) 1,3 - Dichlorobenze 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-Chloropr 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) methan 0.00 93 0 N.D. 14) 1,2,4-Trichlorobenzene 0.00 180 0 N.D. 15) Naphthalene 0.00 ' 128 0 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. 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 0.00 149 0 N.D. 26) 4-Chlorophenyl-phenyl ethe 0.00 204 0 N.D. 27) Fluorene 0.00 166 0 N.D. 28) Azobenzen/ 1,2-Diphenylhyd 0.00 77 0 N.D. 30) N-Nitrosodiphenylamine 0.00 169 0 N.D. 31) 4-Bromophenyl-phenyl ether 0.00 248 0 N.D. 32) Hexachlorobenzene 0.00 284 0 N.D. 33) Phenanthrene 0.00 178 .0 N.D. 34) Anthracene 0.00 178 0 N.D. 35) Di-n-butylphthalate 0.00 149 0 N.D. d 36) Fluoranthene 0.00 202 0 N.D. 39) Pyrene 0.00 202 0 N.D. 40) Butylbenzylphthalate 0.00 149 0 N.D. 41) Benzo (a) antracene 0.00 228 0 N.D. d 42) Bis (2-ethylhexyl) phthala 30.85 149 222694 2.73 ug/L 93 43) Chrysene 0.00 228 0 N.D. d 45) Di-n-Octylphthalate 0.00 149 0 N.D. 46) Benzo (b) fluoranthene 0.00 252 0 N.D.

(#) = qualifier out of range (m) = manual integration LBB0405.D 5080402.M Mon Apr 08 12:51:50 2002 Page 1

NYC-WTC_000060334

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