NYC-WTC_000202530

NYC 9/11 Public Portal Document

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

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Method 8290 Blank Analysis Results Client - ATC ASSOCIATES

Lab Sample ID BLANK-2231 Matrix ■ WIPE Filename U21008B_05 a Dilution NA a Total Amou nt Extracted 1.00 m2 Extracted 09/29/2002 ICALDate // 08/06/2002 Analyzed 10/09/2002 00:50 CCal Filename(s) U21008Aal7 & U21Q08B 16 Injected By MRO:.-2 A -Y •

J. Native Cone EMPC LRL 3.7 internal ng's Percent Isomers ng/m2 ng/m2 ng/m2 Standards Added Recovery 2,3,7,8-TCDF ND 0.00200 2,3,7,8-TCDF-13C 2.00 Total TCDF

2,3,7.8-TCDD ND

ND 0.00200

0.00200 , 2,3,7,8-TCDD-13C 1,2,3,7,8-PeCDF-13C 2,3,4,7,8-PeCDF-13C 2.00 2.00 2.00 s - i Total TCDD ND 0.00200 1,2,3,7,8-PeCDD-13C 2.00 T,2,3,4,7,8-HxCDF-13C 2.00 1,2,3,7,8-PeCDF nd — 0.01000 1,2,3,6,7,8-HxCDF-13C 2.00 ■I 2,3,4,7,8-PeCDF ND — 0.01000 2,3,4,6,7,8-HxCDF-13C 2.0O Total PeCDF

1,2,3,7,8-PeCDD Total ^eCDD ND——

ND ■ ■ 0.01000

0.01000 0.01000 1,2,3,7,8,9-HxCDF-13C 1,2,3,4,7,8-HxCDD-13C 1,2,3,6,7,8-HxCDD-13C 1,2,3,4,6,7,8-HpCDF-13C 2.00 2.00 2.00 2.00 81

s I 1,2,3,4,7,8-HxCDF 1,2,3,6,7,8-HxCDF 2,3,4,6,7,8-HxCDF ND ND ND — 0.01000 0.01000 0.01000 1,2.3,4,7,8,9-HpCDF-13C 1,2,3,4,6,7,8-HpCDD-13C OCDD-13C 2.00 2.00 4.00 2 1,2.3,7,8,9-HxCDF ND 0.01000 1,2.3,4-TCDD-13C 2.00 NA Total HxCDF ND 0.01000 1,2,3,7,8,9-HxCDD-13C 2.00 NA

1,2,3,4,7.8-HxCDD ND 2,3.7,8-TCDD-37CI4 0.20 69 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 1,2,3.4,6.7,8-HpCDF ND Total 2,3,7.8-TCDD I/ " 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 i ? OCDD ND 0.02000

Cone = Concentration (Totals include 2.3,7,S-substituted isomers). I-interference EMPC = Estimated Maximum Possible Concentration E = PCDE interference i 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.....106T946

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

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CITY_21MC100_003273141

NYC-WTC_000202530