NYC-WTC_000223183

NYC 9/11 Public Portal Document

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

^ace Analytical Tel: 612-607-1700 Fax. 612-607-6444 Method 8290 Blank Analysis Results Client - ATC ASSOCIATES

Lab Sample ID BLANK-1661 Matrix WIPE Filename F20615A_03 Dilution NA Total Amount Extracted 1 m2 Extracted 06/10/2002 ICAL Date 05/04/2002 Analyzed 06/15/2002 17:05 CCal Filename(s) F20615A_01 & F20615A_16 Injected By BAL

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 87 Total TCDF ND 0.00200 2,3,7,8-TCDD-13C 2.00 76 1,2.3,7,8-PeCDF-13C 2.00 85 2.3,7.8-TCDD ND 0.00200 2,3,4,7,8-PeCDF-13C 2.00 84 Total TCDD 0.025 0.00200 1.2,3,7,8-PeCDD-13C 2.00 76 1,2,3,4,7,8-HxCDF-13C 2.00 110 1,2,3,7,8-PeCDF ND 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 117 2,3.4.7,8-PeCDF ND 0.01000 2,3.4.6,7,8-HxCDF-13C 2.00 111 Total PeCDF ND 0.01000 1.2.3,7.8,9-HxCDF-13C 2.00 109 1,2,3,4,7,8-HxCDD-13C 2.00 93 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7.8-HxCDD-13C 2.00 108 Total PeCDD ND 0.01000 1.2,3.4.6.7,8-HpCDF-13C 2.00 93 1.2,3,4,7.8,9-HpCDF-13C 2.00 79 1.2,3,4.7,8-HxCDF ND 0.01000 1,2,3.4,6,7,8-HpCDD-13C 2.00 75 1,2.3,6.7.8-HxCDF ND 0.01000 OCDD-13C 4.00 72 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-.t3C 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 83 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/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 OCDD ND 0.02000 Cone = Concentration (Totals include 2,3,7,8-8ubstituted 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 NC = Not Calculated A = Detection Limit based on signal-to-noise measurement * = Sae Discussion

Report No.... 02-1058087

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

CITY_21MC100_002889448

NYC-WTC_000223183