NYC-WTC_000213019

NYC 9/11 Public Portal Document

170C Elrii Street-Suite 200 Minneapolis, MN 55414

^ace Analytical__________ Method 8290 Analysis Results Tel: 612-607-1700

Client-ATC Client’s Sample ID ATC-0427-STY-DX1 Lab Sample ID 103513461 Filename F20S24A_11 injected By MRO Total Amount Extracted 0.38 g Matrix DUST % Moisture NA Dilution NA Dry Weight Extracted NA Collected 04/27/2002 ICAL Date 05/04/2002 Received 05/01/2002 CCal Fil6name(s) F20524A_01 & F20524A_15 Extracted 05/20/2002 Method Blank ID BLANK-1633 Analyzed 05/24/2002 17:26 Native Cone EMPC LRL Internal ng's Percent isomers ng/Kg ng/Kg ng/Kg Standards Added Recovery 2.3,7,8-TCDF 38 5.3 E 2,3,7,8-TCDF-13C 2.00 72 Total TCDF- 500.0 5.3 2,3,7,8-TCDD-13C 2.00 70 1.2.3,7,8-PeCDF-13C 2.00 68 2,3,7,8-TCDD 9.5 5.3 J 2,3,4,7,8-PeCDF-13C 2.00 72 Total TCDD 1000.0 5.3 1,2,3.7,8-PeCDD-13C 2.00 77 1,2,3.4,7,8-HxCDF-13C 2.00 61 1,2,3,7,8-PeCDF 41.0 26.0 J 1.2,3.6,7,8-HxCDF-13C 2.00 62 2,3,4,7,8-PeCDF 64.0 26.0 J 2,3,4,6,7,8-HxCDF-13C 2.00 83 Total PoCDF 450.0 26.0 1,2,3.7,8,g-HxCDF-13C 2.00 50 1,2.3,4.7,8-HxCDD-13C 2.00 85 1,2,3.7.8-PeCDD ND 26.0 1,2,3,6,7,8-HXCDD-13C 2.00 90 Total PeCDD 500.0 26.0 1,2,3,4,6,7.8-HpCDF-13C 2.00 61 1,2,3,4,7,8,9-HpCDF-13C 2,00 39 IP 1,2,3,4,7,8-HxCDF 54.0 26.0 J 1,2,3,4,6,7,8-HpCDD-13C 2.00 52 1,2.3.8,7.8-HxCDF 83 26.0 E OCDD-13C 4.00 47 2.3,4.6.7,8-HxCDF 77.0 26,0 J 1,2,3,7,8,9-HxCDF 78 26,0 I 1,2,3.4-TCDD-13C 2.00 NA Total HxCDF 620.0 26.0 1,2,3,7,8,9-HxCDD-13C 2.00 NA 1,2,3,4.7,8-HxCDD 30.0 26.0 J 2.3.7,8-TCDD-37CI4 0.20 72 1,2.3,6,7,8-HxCDD 49.0 26.0 J 1,2,3,7,8.9-HxCDD 43.0 26.0 J Total HxCDD 970.0 26.0 1,2,3,4,6.7,8-HpCDF 340.0 26.0 Total 2.3.7,8.TCDD 1.2,3,4,7.8.9-HpCDF ND 32.0 A Equivalence: 82 ng/Kg Total HpCDF 340.0 26.0 (Using ITE Factors)

1,2,3,4,6,7,8.HpCDD 540.0 26.0 Total HpCDD 900.0 26,0 OCDF 380.0 53.0 OCDD 3900.0 53.0 Results reported on a total weight basis LRL B Lower Reporting Umit Cone a Concentration (Totals Inducle 2,3,7,8-6utMt)tute4 isomers) IB Interference EMPC > EstImatocI Maximum Possible Concentration E = PCDE Interferance A a Detection Um(t based on signal-to-noise measurement S = Saturated signal J - Concentration detected is below ths calibration range ND = Not Detected B s Lass than 10 times nigher than method blank level NA = Not Applicabls P B Recovery outside of target range NC a Not Calculated Nn B Value obtained from additional analysis * = See Discussion Report No.... 02-1057132

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

CITY_21MC100_002867940

NYC-WTC_000213019