GCMS surrogate recovery report, sample AE12763, June 2002

NYC 9/11 Public Portal Document Library Search Compound Report Data File : C:\MSDCHEM\l\DATA\061102\12763.D Vial: 7 Acq On : 11 Jun 2002 2:46 pm Operator: Sample : re-ext. Inst : Instrumen Mise : Multiplr: 1.00 MS Integration Params: LSCINT.e Quant Method : C:\MSDCHEM\1\METHODS\060302.M (Chemstation Integrator) Title : 508 Modified GC/MS scan Library : C:\DATABASE\NIST98.L

Peak Number 2 Methylene Chloride Concentration Rank 1 R.T. EstConc Area Relative to ISTD R.T. 3.72 5.60 ug/L 4584050 1,4-dichlorobenzene-d4 9.90

Hit# of 5 Tentative ID MW MolForm CAS# Qual 1 Methylene/Chloride 84 CH2C12 000075-09-2(97 2 Methylene Chloride 84 CH2C12 000075-09-2 94 3 Methylene Chloride 84 CH2C12 000075-09-2 90 4 Methy)he Chloride 84 CH2C12 000075-09-2 47 Abundance Scan 109 (3.720 min): 12763.D (-93) (-) m/z 49.10 100.00% 49 84

5000

88 3.40 3.60 3.80 4.00 ........ 35384144 ) H-7 t + Of ■ ■ i " i ■' “ i “ ■ i ■ ■ ■ ■ i ■ “j i ■ “ • i1 ‘ “ i'11 ■ i ■ ‘1 m/z 84.00 69.15% niz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #12327: Methylene Chloride 49 84 5000 1 ■ ' i • ■ ■ ■ i ■ ■ 1 ■ i ‘ ■ i • ■ ‘ ■ i 3.40 3.60 3.80 4.00 m/z 86.00 53.71% +2m I 88 14 18 24 2831 353841 olTTIWTTITHTTITITTTTTT Tl/z-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #111039: Methylene Chloride 49 ■ ■ ■ । ■ ■ ■ ■ । ■ ■ • ■ । ■ ■ ■ ■ ।' । 84 3.40 3.60 3.80 4.00 5000 m/z 51.10 32.04%

Ot I I | I 1 ■ I [ ! I T-> | 1 > I l | J > > < | l 2831 3538 43 l1 1 |t >. ;[ i1 1 1| 1I I■ |> >2 57 67 71 77 . 88 ,!nmgngmmmmgtt H niz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 Abundance #111041: Methylene Chloride ' ' ‘ I ‘ ‘ ‘ ‘ I ' ‘ ‘ ‘ I ' ‘ ‘ ‘ I ' ' ' ' I 49 3.40 3.60 3.80 4.00 m/z 47.10 16.92%

./M 84 5000

46 2629 41 | 59 65 73 77 88 0 '11 ■ ’ ■ ■ i ■ ■1111"11" " i11111" i11" 11111P । ,I 52 1 ■11 ■ ■ ■ ■ i" ■ • i ■ ■ ■' i''111 ■ ■'11111 thlpayun miz-> 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 3.40 3.60 3.80 4.00

12763.D 060302.M Tue Jun 11 15:53:44 2002 Page 5

NYC-WTC_000015813