NYC-WTC_000199246

NYC 9/11 Public Portal Document

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

^ace Analytical Method 8290 Analysis Results Tel: 612-607-1700 Fax: 612- 607-6444

Client - ATC ASSOCIATES Client’s Sample ID ATC-0822-131M-DX1 Lab Sample ID 103800389 Filename U20929B_15 Injected By BAL Total Amount Extracted 1.00 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 08/22/2002 ICAL Date 08/06/2002 Received 08/24/2002 CCal Filename(s) U20929B_01 & U20929B_17 Extracted 09/17/2002 Method Blank ID BLANK-2163 Analyzed 09/30/2002 12:11 Native Cone EMPC LRL Internal ng’s Percent Isomers ng.'m2 ng/m2 ng/rr'’ Standards Added Recover^' 2,3,7,8-TCDF ND 0.0020 2,3,7,8-TCDF-13C 2.00 56 Total TCDF 0.312 0.0020 2,3,7,8-TCDD-13C 2.00 57 1,2,3,7,8-PeCDF-13C 2.00 49 2,3.7.8-TCDD ND 0.0020 2,3,4,7,8-PeCDF-13C 2.00 45 Total TCDD 0.329 0.0020 1,2,3,7,8-PeCDD-13C 2.00 46 1,2,3,4,7,8-HxCDF-13C 2.00 82 1,2,3.7,8-PeCDF 0.027 0.0100 E 1,2,3,6,7,8-HxCDF-13C 2.00 65 2,3,4,7,8-PeCDF ND 0.0100 2,3,4,6,7,8-HxCDF-13C 2.00 61 Total PeCDF ND 0.0100 1,2,3,7,8,9-HxCDF-13C 2.00 47 1,2,3,4,7,8-HxCDD-13C 2.00 88 1,2,3.7,8-PeCDD ND 0.0100 1,2,3,6,7,8-HxCDD-13C 2.00 59 Total PeCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF-13C 2.00 34 IP 1,2,3.4,7,8,9-HpCDF-13C 2.00 48 1,2,3,4,7,8-HxCDF ND 0.0100 1,2,3,4,6,7,8-HpCDD-13C 2.00 50 1,2,3,6,7,8-HxCDF ND 0.0100 OCDD-13C 4.00 47 2,3,4,6,7,8-HxCDF ND 0.0100 1,2,3,7,8,9-HxCDF ND 0.0100 1,2.3,4-TCDD-13C 2.00 NA Total HxCDF ND 0.0100 1,2,3,7.8,9-HxCDD-13C 2.00 NA

1,2,3,4,7,8-HxCDD ND 0.0100 2,3,7,8-TCDD-37CI4 0.20 61 1,2,3,6,7,8-HxCDD ND 0.0100 1,2,3,7,8,9-HxCDD ND 0.0100 Total HxCDD ND 0.0100 1,2,3,4,6,7,8-HpCDF ND 0.0100 Total 2,3,7,8-TCDD 1,2.3.4,7,8,9-HpCDF ND 0.0100 Equivalence: 0.0016 ng/m2 Total HpCDF 0.'379 0.0100 (Using ITE Factors)

1,2,3,4,6,7,8-HpCDD 0.075 0.0100 Total HpCDD 0.130 0.0100

OCDF 0.386 0.0200 J OCDD 0.780 0.0200 LRL = Lower Reporting Limit Cone = Concentration (Totals include 2,3,7,8-substituted isomers) I = Interference EMPC = Estimated Maximum Possible Concentration E = PCDE Interference A = Detection Limit based on signal-to-noise measurement S = Saturated signal J = Concentration detected is below the calibration range ND = Not Detected B = Less than 10 times higher than method blank level NA = Not Applicable P = Recovery outside of target range NO = Not Calculated Nn = Value obtained from additional analysis * = See Discussion Report No.... 1061758

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

CITY_21MC100_003048589

NYC-WTC_000199246