NYC-WTC_000189289

NYC 9/11 Public Portal Document

Pace Analytical Services Inc 1700 Elm Street Suite 200 Minneapolis MN 55414

1 ) ^ace Analytical____________ Method 8290 Laboratory Control Spike Results Tel 612 607 1700 Fax 612 607 6444

I Client ATC JI

Lab Sample ID SPIKE DUP 1377 Filename F20416B_03 Matrix WIPE Total Amount Extracted 1 m2 Dilution NA I CAL Date 04/12/2002 Extracted 04/12/2002 CCal Filename(s) F20416B_01 & F20416B_13 Analyzed 04/17/2002 0515 Method Blank ID BLANK 1566 Injected By BAL

Native Qs Qm % Internal ng s Percent Isomers (ng) (ng) Bec,, Standards Added Recovery 2 3 7 8 TCDF 0 20 0 20 99 2 3 7 8 TCDF 13C 2 00 76 23 7 8 TCDD 13C 2 00 74 1 2 37 8 PeCDF 13C 2 00 81 2 3 7 8 TCDD 0 20 0 20 98 234 78 PeCDF 13C 2 00 76 1 2 37 8 PeCDD 13C 2 00 82 1 2347 8 HxCDF 13C 2 00 101 1 2 3 7 8 PeCDF 1 00 0 96 36 1 23 6 78 HxCDF 13C 2 00 65 2 3 4 7 8 PeCDF 1 00 0 97 97 23467 8 HxCDF 13C 2 00 88 1 237 8 9 HxCDF 13C 2 00 85 1 2 3 4 7 8 HxCDD 13C 2 00 94 1 2 3 7 8 PeCDD 1 00 0 99 99 1 2 367 8 HxCDD 13C 2 00 83 1 234 678 HpCDF 13C 2 00 77 1 234789 HpCDF 13C 2 00 73 1 2 3 4 7 8 HxCDF 1 00 0 99 99 1 234 678 HpCDD 13C 2 00 76 1 2 3 6 7 8 HxCDF 1 00 1 00 100 OCDD 13C 4 00 70 I 2 3 4 6 7 8 HxCDF 1 2 3 7 8 9 HxCDF 1 00 1 00 0 99 0 99 99 99 1 234 TCDD 13C 1 237 8 9 HxCDD 13C 2 00 2 00 NA NA 1 2 3 4 7 8 HxCDD 1 00 1 05 105 2 3 7 8 TCDD 37CI4 0 20 80 1 2 3 6 7 8 HxCDD 1 00 1 05 105 1 2 3 7 8 9 HxCDD 1 00 1 06 106

1 2 3 4 6 7 8 HpCDF 1 00 1 03 103 1 2 3 4 7 8 9 HpCDF 1 00 1 05 105

1 2 3 4 6 7 8 HpCDD 1 00 1 07 107

OCDF 2 00 1 86 93 OCDD 2 00 2 02 101

Qs = Quantity Spiked Qm = Quantity Measured Rec = Recovery {Expressed as Percent) P = Recovery outside of target range X = Background subtracted value Nn = Value obtained from additional analysis NA = Not Applicable = See Discussion Report No 02 1055555

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

CITY_21MC100_003085244

NYC-WTC_000189295