Air sampling summary report, 400 Chambers Street, 2002

NYC 9/11 Public Portal Document

FEB-14-02 11:09 FROM-PACE ANALYTICAL 612-607-6444 T-452 P.02/04 F-677 1700 Elm Street - Suite 200 Minneapolis, MN 55414 TM

11/_i aceAnalvocal Method 23 Analysis Results Tel: 612.807-1704 Fax RI 2- R07-6444

Client - ATC Client's Sample ID P-1 CHAMBERS ST Lab Sample ID 103286951 Filename F20212B_06 Matrix PUF Injected By BAL Dilution NA Amount Extracted 421.92 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 00:34 Native Conc EMPC LRL Internal ng's Percent Isomers pg/m3 pg/m3 pg/m3 Standards Added Recovery

2,3,7,8-TCDF 0.015 ----- 0.0065 JA 2,3,7,8-TCDF-13C 2.00 80 Total TCDF 0.470 ----- 0.0047 2,3,7,8-TODD-13C 2.00 82 1,2,3,7,8-PeCDF-13C 2.00 90 2,3,7,8-TCDD ----- 0.0076 0.0047 I 1,2,3,7,8-PeCDD-13C 2.00 .97 Total TODD 0.500 ----- 0.0047 1,2,3,6,7,8-HxCDF-13C 2.00 81 1,2,3,6,7,8-HxCDD-13C 2.00 77 1,2,3,7,8-PeCDF ND ----- 0.0240 1,2,3,4,6,7,8-HpCDF-13C 2.00 71 2,3,4,7,8-PeCDF ND ----- 0.0240 1,2,3,4,6,7,8-HpCDD-13C 2.00 74 Total PeCDF 0.072 ----- 0.0240 J OCDD-13C 4.00 63

1,2,3,7,8-PeCD0 NO ----- 0.0240 Recovery Total PeGDD 0.046 ----- 0.0240 J Standards 1,2,3,4-TCDD-13C 2.00 NA 1,2,3,4,7,8-HxCDF ND --•-- 0.0240 1,2,3,7,8,9-HxCDD-13C 2.00 NA 1,2,3,6,7,8-HxCDF ND ----- 0.0240 2,3,4,6,7,8-HxCDF ND ---- 0.0240 Surrogates 1,2,3,7,8,9-HxCDF ND ----- 0.0240 2,3,7,8-TCDD-37CI4 2.00 103 Total HxCDF 0.029 -- -- 0.0240 J 2,3,4,7,8-PeCDF-13C 2.00 105 1,2,3,4,7,8-HxCDF-13C 2.00 112 1,2,3,4,7,8-HxCDD NO 0.0240 1,2,3,4,7,8-HxCDD-13C 2-00 128 99 -- --

1,2,3,6,7,8-HxCDD ND ----- 0.0240 1,2,3,4,7,8,9-HpCDF-13C 2.00 1,2,3,7,8,9-HxCDD ND ----- 0.0240 Total HxCDD 0.050 ----- 0.0240 J 1,2,3,4,6,7,8-HpCDF ND ----- 0.0240 Total 2,3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF ND ----- 0.0240 Equivalence: 0.0021 pg/m3 Total HpCDF ND ----- 0.0240 (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD 0.046 ----- 0.0240 J Total HpCDD 0.091 ----- 0.0240 J OCDF ND ---- 0.0470 OCDD 0.170 ----- 0.0470 J

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 S n Less than 10 times higher than method blanl 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

REPORT OF LABORATORY ANALYSIS This report shall not be reproduced, except In full, without the written consent of Pace Analytical Services, Inc.

NYC-WTC 000102869