Ambient air sampling report Book Two for 105 Duane Street,

NYC 9/11 Public Portal Document

FEB-14-02 11:09 FROM-PACE ANALYTICAL 612-607-6444 T-452 P.03/04 F-677 1700 Elm Street - Suite 2GC Minneapolis, MN 55414 nM

1 aceAnal "cal od 23 Analysis Results Tel: 612-6D7-170C

Client - ATC Client's Sample ID P-3 DUANE ST Lab Sample 10 103286969 Filename F20212B_07 Matrix PUF Injected By BAL Dilution NA Amount Extracted 491.07 m3 Collected 01/23/2002 ICAL Date 01/25/2002 Received 01/25/2002 CCal Filename(s) F20212B_02 Extracted 01/29/2002 Method Blank ID BLANK-1441 Analyzed 02/13/2002 01:23 Native Conc EMPC LRL Internal ng's Percent Isomers pg/m3 pg/m3 pg/m3 Standards Added Recovery 2,3,7,8-TCDF ---- 0.0270 0.0064 IA 2,3,7,8-TCDF-1 SC 2.00 69 Total TCDF 0.770 ----- 0.0041 2,3,7,8-TCDD-13C 2.00 72 1 ---- 1,2,3,7,8-PeCDF-13C 2.00 77 2,3,7,8-TCDD - 0.0055 0.0045 IA 1,2,3,7,8-PeCDD-13C 2.00 83 Total TCDD 2.000 --- 0.0041 1,2,3,6,7,8-HxCDF-13C 2.00 67 1,2,3,6,7,8-HxCDD-13C 2.00 67 1,2,3,7,8-PeCDF ----- 0.0310 0.0200 E 1,2,3,4,6,7,8-HpCDF-13C 2.00 62 2,3,4,7,8-PeCDF ND 0.0200 1,2,3,4,6,7,8-HpCDD-13C 2.00 68 Total PeCDF 0.320 ---- 0.0200 OCDD-13C 4.00 60

i,2,3,7.8-PeCDD ND 0.0200 Recovery I Total PeCDO 1,2,3,4,7,8-HxCDF 0.370 ----- 0.0330 0.0200 0.0200 E Standards 1,2,3,4-TODD-13C 1,2,3,7,8.9-HxCDD-13C 2.00 2.00 NA NA 1,2,3,6,7,8-HxCDF --- 0.0220 0.0200 E 2,3,4,6,7,8-HxCDF 0.026 0.0200 J Surrogates 1,2,3,7,8,9-HxCDF ND 0.0200 2,3,7,8-TCDD-37Cl4 2.00 103 Total HxCDF 0.150 ----- 0,0200 2,3,4,7,8-PeCDF-13C 2.00 103 ----- 1,2,3,4,7,8-HxCDF-13C 2.00 118

I 1,2,3,4,7,8-HxCDD 1,2,3,6,7,8-HxCDD 1,2,3,7,8,9-HxCDD ND ND ND --- 0.0200 0.0200 0.0200 1,2,3,4,7,8-HxCDD-13C 1,2,3,4,7,8,9-HpCDF-13C 2.00 2.00 127 100

Total HxCDD 0.350 - 0.0200 • 1,2,3,4,6,7,8-HpCDF 0.048 0.0200 J Total 2,3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF ND --- 0.0200 Equivalence: 0.0048 pg/m3 Total HpCDF 0.048 - 0.0200 J (Using ITE Factors)

L 1,2,3,4,6,7,8-HpCDD Total HpCDD 0.110 0.200 ----- 0.0200 0.0200

I OCDF OCDD 0.056 0.590 :Y:_ 0.0410 J 0.0410

Conc = Concentration (Totals include 2,3,7,8-substituted isomers). I = Interference EMPC = Estimated Maximum Possible Concentration E = PCDE Interference LRL = Lower Reporting Limit S = Saturated signal J = Concentration detected is below the calibration range NO = Not Detected B = Less than 10 times higher than method thank level NA = Not Applicable • P = Recovery outside of target range NC = Not Calculated Nn = Value obtained from additional analysis A = Detection Limit based on signal to noise Report No.....02-1053453 I REPORT OF LABORATORY ANALYSIS This report snail not be reproduced, except in full, without the written consent of Pace Analytical Services, Inc.

NYC-WTC 000104551