NYC-WTC_000215001

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-1505 Matrix WIPE Filename F20315A_03 Dilution NA Total Amount Extracted 1 m2 Extracted 03/12/2002 I CAL Date 01/24/2002 Analyzed 03/15/2002 13:34 CCal Filename(s) F20315A_01 &F20315A_16 Injected By MASB

Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF 0.0025 0.00200 J 2,3,7,8-TCDF-13C 2.00 73 Total TCDF 0.0025 0.00200 J 2,3,7,8-TCDD-13C 2.00 68 1,2,3,7,8-PeCDF-13C 2.00 80 2,3,7,8-TCDD ND 0.00200 2,3,4,7,8-PeCDF-13C 2.00 79 Total TCDD ND 0.00200 1,2,3,7,8-PeCDD-13C 2.00 73 1,2.3,4,7,8-HxCDF-13C 2.00 164P 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 146 P 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6,7,8-HxCDF-13C 2.00 126 Total PeCDF ND 0.01000 1,2,3,7.8,9-HxCDF-13C 2.00 77 1,2,3,4,7,8-HxCDD-13C 2.00 155 P 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 130 Total PeCDD ND 0.01000 1,2,3,4,6,7,8-HpCDF-13C 2.00 125 1,2,3,4,7,8,9-HpCDF-13C 2.00 70 1,2,3,4,7,8-HxCDF ND 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 101 1,2,3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 82* 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 67 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: 0.00028 ng/m2 Total HpCDF ND 0.01000 (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD ND 0.01000 _ Total HpCDD . ND 0.01000

•j OCDF ND 0.02000 OCDD 0.0280 0.02000 J

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

Report No.... 02-1054698

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

CITY_21MC100_002871445

NYC-WTC_000215001