NYC-WTC_000229441

NYC 9/11 Public Portal Document

Minneapolis, MN 55414 TM

’ace Analvtical Tel: 612-607'1700 Fax- 61?- 607-64.44 Method 8290 Analysis Results Client - ATC ASSOCIATES Client's Sample ID ATC-0424-STY-DX3 Lab Sample ID 103499943 Filename F20509C_10 Injected By BAL Total Amount Extracted 1 m2 Matrix WIPE % Moisture NA Dilution NA Dry Weight Extracted NA Collected 04/24/2002 ICAL Date 05/04/2002 Received 04/30/2002 CCal Filename(s) F20509B_15 & F20509C_15 Extracted 05/06/2002 Method Blank ID BLANK-1610 Analyzed 05/10/2002 02:40 Native Cone EMPC LRL Internal ng's Percent isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF 0.0047 -- 0.00250 JA 2,3,7,8-TCDF-13C 2.00 75 Total TCDF 0.2600 — 0.00200 2,3,7,8-TCDD-13C 2.00 62 1,2,3,7,8-PeCDF-13C 2.00 66 2,3,7,8-TCDD 0.0026 0.00200 J 2,3,4,7,8-PeCDF-13C 2.00 66 Total TCDD 0.3500 0.00200 1,2,3,7,8-PeCDD-13C 2.00 63 1,2,3,4,7,8-HxCDF-13C 2.00 97 1,2,3,7,8-PeCDF 0.027 0.01000 E 1,2,3,6,7,8-HxCDF-13C 2.00 63 2,3,4,7,8-PeCDF 0.0240 -- 0.01000 J 2,3,4,6,7,8-HxCDF-13C 2.00 81 Total PeCDF 0.1700 -- 0.01000 1,2,3,7,8,9-HxCDF-13C 2.00 78 1,2,3,4,7,8-HxCDD-13C 2.00 79 1,2,3,7,8-PeCDD ND 0.01000 1,2,3,6,7,8-HxCDD-13C 2.00 75 Total PeCDD 0.2700 0.01000 1,2,3,4,6,7,8-HpCDF-13C 2.00 72 1,2,3,4,7,8,9-HpCDF-13C 2.00 63 1,2,3,4,7,8-HxCDF 0.0260 0.01000 J 1,2,3,4,6,7,8-HpCDD-13C 2.00 60 1,2,3,6,7,8-HxCDF 0.0230 0.01000 J OCDD-13C 4.00 72 2,3,4,6,7,8-HxCDF 0.0360 0.01000 J 1,2,3,7,8,9-HxCDF 0.0130 0.01000 J 1,2,3,4-TCDD-13C 2.00 NA Total HxCDF 0.2400 0.01000 1,2,3,7,8,9-HxCDD-13C 2.00 NA 1,2,3,4,7.8-HxCDD 0.0120 0.01000 J 2,3,7,8-TCDD-37CI4 0.20 75 1,2,3,6,7,8-HxCDD 0.0210 0.01000 J 1.2,3,7,8,9-HxCDD 0.0150 0.01000 J Total HxCDD 0.8800 0.01000 1,2,3,4,6,7,8-HpCDF 0.1400 0.01000 Total 2,3,7,8-TCDD 1,2,3,4,7,8,9-HpCDF 0.0280 0.01000 J Equivalence: 0.033 ng/m2 Total HpCDF 0.1700 0.01000 (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD 0.1600 0.01000 Total HpCDD 0.2600 0.01000 OCDF 0.0870 0.02000 J OCDD 0.6500 0.02000 LRL = Lower Reporting Limit Cone = Concentration (Totals include 2,3,7,8-substitutGd 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 8 = Less than 10 times higher than method blank level NA = Not Applicable P = Recovery outside of target range NC = Not Calculated Nn = Value obtained from additional analysis * = See Discussion Report No.... 02-1056899

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

CITY_21MC100_003797501

NYC-WTC_000229441