NYC-WTC_000189289

NYC 9/11 Public Portal Document

Pace Analytical Services Inc 1700 Elm Street Suite 200 Minneapolis MN 55414 tm

^ace Analytical Tel 612 607 1700 Fax 612 607 6444

Method 8290 Blank Analysis Results Client ATC

Lab Sample ID BLANK 1566 Matrix WIPE Filename F20416B_08 Dilution NA Total Amount Extracted 1 m2 Extracted 04/12/2002 ICAL Date 04/12/2002 Analyzed 04/17/2002 09 20 CCal Filename(s) F20416B_01 & F20416B_13 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 2 378 TCDF 13C 2 00 72 Total TCDF ND 0 00200 2 37 8 TCDD 13C 2 00 71 1 2 378 PeCDF 13C 2 00 79 2 3 7 8 TCDD ND 0 00200 2 34 78 PeCDF 13C 2 00 77 Total TCDD ND 0 00200 1 2 378 PeCDD 13C 2 00 81 1 2 3 47 8 HxCDF 13C 2 00 99 1 2 3 7 8 PeCDF ND 0 01000 1 2 3678 HxCDF 13C 2 00 69 i 2 3 4 7 8 PeCDF Total PeCDF ND ND 0 01000 0 01000 2 3 4678 HxCDF 13C 1 2 378 9 HxCDF 13C 2 00 2 00 84 87 1 2 3478 HxCDD 13C 2 00 93 1 2 3 7 8 PeCDD ND 0 01000 1 23 678 HxCDD 13C 2 00 79 Total PeCDD ND 0 01000 1 2 3 467 8HpCDF 13C 2 00 77 1 2 34789HpCDF13C 2 00 73 1 2 3 4 7 8 HxCDF ND 0 01000 1 2 34678HpCDD 13C 2 00 74 1 2 3 6 7 8 HxCDF ND 0 01000 OCDD 13C 4 00 69 2 3 4 6 7 8 HxCDF ND 0 01000 1 2 3 7 8 9 HxCDF ND 0 01000 1 234TCDD 13C 2 00 NA Total HxCDF ND 0 01000 1 2 37 89 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 J 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 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 NC = Not Calculated A = Detection Limit based on signal to noise measurement = See Discussion

Report No 02 1055555

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

CITY_21MC100_003085239

NYC-WTC_000189290