NYC-WTC_000219094

NYC 9/11 Public Portal Document

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

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Method 8290 Blank Analysis Results Client - ATC

Lab Sample ID BLANK-1389 Matrix WIPE

I Filename Total Amount Extracted ICAL Date F20103A_06 1 m2 01/02/2002 Dilution Extracted Analyzed NA 12/23/2001 01/03/2002 12:02 CCal Filename(s) F20102A_22 & F20103B_01 Injected By LMD

Native Cone EMPC LRL Internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND 0.00200 2,3,7,8-TCDF-13C 2.00 75 Total TCDF ND 0.00200 2,3,7,8-TCDD-13C 2.00 73 1,2,3,7,8-PeCDF-13C 2.00 81 2,3,7,8-TCDD ND 0.00200 2,3,4,7,8-PeCDF-13C 2.00 80 B Total TCDD ND 0.00200 1,2,3,7,8-PeCDD-13C 1,2,3,4,7,8-HxCDF-13C 2.00 2.00 83 89 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 77 2,3,4,7,8-PeCDF ND 0.01000 2,3,4,6,7,8-HxCDF-13C 2.00 85 Total PeCDF ND 0.01000 1,2,3,7,8,9-HxCDF-13C 2.00 92 1,2,3,4,7,B-HxCDD-13C 2.00 111 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 77 Total PeCDD ND 0.01000 1,2,3,4,6,7,8-HpCDF-13C 2.00 95 1,2,3,4,7,8,9-HpCDF-13C 2.00 95 1,2,3,4,7,8-HxCDF ND 0.01000 1,2,3,4,6,7,8-HpCDD-13C 2.00 104 1,2.3,6,7,8-HxCDF ND 0.01000 OCDD-13C 4.00 89 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

fl 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

U: 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/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 OCDF ND 0.02000 s OCDD ND 0.02000

Cone = Concentration (Totals include 2,3,7,8-substituted isomers). 1= 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 NC = Not Calculated A = Detection Limit based on signai-to-noise measurement * = See Discussion

Report No.... 01-1052540

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

CITY_21MC100_002879234

NYC-WTC_000219096