NYC-WTC_000229460

NYC 9/11 Public Portal Document

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

Client - ATC Client's Sample ID ATC-0427-STY-DX6 Lab Sample ID 103513511 Filename F20525B_04 Injected By BAL Total Amount Extracted 0.42 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 Filename(s) F20525A_17 & F20525B_16 Extracted 05/20/2002 Method Blank ID Bl-ANK-1633 Analyzed 05/26/2002 09:05 Native Cone EMPC LRL Internal ng’s Percent Isomers ng/Kg ng/Kg ng/Kg Standards Added Recovery 2,3.7,8’TCDF 36 5.1 EA 2,3,7,8-TCDF-13C 2.00 75 Total TCDF 530.0 4.8 2,3.7,8-TCDD-13C 2.00 75 1,2,3,7,8-PsCDF-l3C 2.00 75 2,3,7.8-TCDD 4,8 4.8 J 2.3,4,7,8-PeCDF-13C 2.00 78 Total TCDD 780.0 4.8 1,2.3,7,8-PeCDD-l3C 2.00 83 1.2,3,4,7,a-HxCDF-13C 2,00 84 1,2,3,7.8-PeCDF 35.0 24.0 J 1,2,3,6.7,8-HxCDF-13C 2.00 77 2,3.4,7,8-PeCDF 50.0 24.0 J 2,3,4,6,7.a-HxCDF-13C 2.00 88 Total PeCDF 360.0 24.0 1,2,3,7,8,9-HxCDF-13C 2.00 77 1,2,3,4,7,8-HxCDD-13C 2.00 88 1,2,3,7.8-PeGDD ND 24.0 1,2.3,6,7,8-HxCDD-13C 2.00 91 Total PeCDD 420.0 24.0 1,2.3,4,6,7,8-HpCDF-13C 2.00 81 1,2,3,4,7.8,9-HpCDF-13C 2.00 68 1.2,3,4,7,8-HxCDF 79 24.0 E 1,2,3,4,6,7,8-HpCDD-13C 2.00 81 1,2,3,6.7,8-HxCDF 62 24.0 E OCDD-13C 4.00 66 2,3,4,6,7,8-HxCDF 52.0 24.0 J 1,2,3.7,8,9-HxCDF 25 24.0 I 1,2,3,4-TCDD-13C 2.00 NA Total HxCDF 360.0 24.0 1,2,3,7,8,9-HxCDD-13C 2.00 NA 1,2,3,4,7.8-HxCDD ND 24.0 2,3,7,8-TCDD-37Cl4 0.20 76 1,2,3.6.7,8-HxCDD 42.0 24.0 J 1,2,3,7,8,9-HxCDD 33.0 24.0 J Total HxCDD 790.0 24.0 1,2.3,4,6,7,8-HpCDF 280.0 24.0 Total 2,3,7,8-TCDD 1,2,3,4.7,8,9-HpCDF ND 27.0 A Equivalence: 55 ng/Kg Total HpCDF 280.0 24,0 (Using ITE Factors) 1,2,3,4,6,7,8-HpCDD 480.0 24.0 Total HpCDD 770,0 24.0 OCDF 410.0 48.0 OCDD 3300.0 48.0 Results reported on a total weight basis LRL = Lower Reporting Limit Cone = Concentration (Totals include 2,3,7,8-3ubst|trted isomers) I = Interference EMPC = estimated Maximum Possible Concentration E = PCDE Interference A s Detection Limit based on signai-to-noise measurement S = Saturated signal J s 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 NC = Not Calculated Nn = Value obtained from additional analysis • = See Discussion Report No.... 02-1057132

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

CITY_21MC100_002902521

NYC-WTC_000229460