NYC-WTC_000197589

NYC 9/11 Public Portal Document

Pace Analytical Services, Inc. 1700 Elm street - Suite 200 Minneapolis, MN 55414

^aceAnalytical Tel: 612-607-1700 Fax: 612- 607-6444

Method 8290 Blank Analysis Results Client - ATC

Lab Sample ID BLANK-1358 Matrix WIPE Filename F11208A_04 Dilution NA Total Amount Extracted 1 Sample Extracted 12/05/2001 I CAL Date 11/19/2001 Analyzed 12/08/2001 19:46 CCal Filename(s) F11208A_01 &F11208A_17 Injected By BAL

..I Native Cone EMPC LRL Internal ng's Percent Isomers ng/S ng/S ng/S Standards Added Recovery

J 2,3.7,8-TCDF Total TCDF ND ND 0.00200 0.00200 2,3,7,8-TCDF-13C 2,3,7,8-TCDD-13C 2.00 2.00 62 73 1,2,3,7,8-PeCDF-13C 2.00 75 3 2,3,7,8-TCDD Total TCDD ND 0.0033 0.00200 0.00200 J 2,3,4,7,8-PeCDF-13C 1,2,3,7,8-PeCDD-13C 2.00 2.00 75 85 1,2,3,4,7,8-HxCDF-13C 2.00 87 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 88 -"I 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6,7,8-HxCDF-13C 2.00 86 Total PeCDF ND 0.01000 1,2,3,7,8,9-HxCDF-13C 2.00 77 1,2,3,4,7,8-HxCDD-13C 2.00 77 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 95 Total PeCDD ND 0.01000 1,2,3,4,6,7,8-HpCDF-13C 2.00 80 <3 1,2,3,4,7,8,9-HpCDF-13C 2.00 63 1,2,3,4,7,8-HxCDF ND 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 73 1,2,3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 47 2,3,4,6,7,8-HxCDF ND 0.01000 1,2,3,7,8,9-HxCDF ND 0.01000 1,2,3,4-TCDD-13C 2.00 NA Total HxCDF ND 0.01000 1,2,3,7,8,9-HxCDD-13C 2.00 NA

1,2,3,4,7,8-HxCDD ND 0.01000 2,3,7.8-TCDD-37CI4 0.20 76 1,2,3,6,7,8-HxCDD ND 0.01000 1,2,3,7,8,9-HxCDD ND 0.01000 Total HxCDD ND 0.01000 1,2,3,4,6,7,8-HpCDF ND 0.01000 Total 2,3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF ND 0.01000 Equivalence: 0.00 ng/S Total HpCDF ND 0.01000 (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD ND 0.01000 Total HpCDD ND 0.01000 OCDF ND 0.02000 OCDD ND 0.02000

Cone = Concentration (Totals include 2,3,7,8-substituted isomers). I = Interference EMPC = Estimated Maximum Possible Concentration E = PCDE Interference LRL = Lower Reporting Limit ND = Not Detected J = Concentration detected is below the calibration range NA = Not Applicable P = Recovery outside of target range _ ND = Not Calculated A = Detection Limit based on signal-to-noise measurement • = See Discussion

Report No.... 01-1051682

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

CITY_21MC100_003046213

NYC-WTC_000197590