Request for firebrick sealing letter, October 2002

NYC 9/11 Public Portal Document

3/11/2003 PASC- Certificate ofAnalysis Page 2 of 5

R02090951 R02090951 R02090951 R02090951 R02090951 aientID: 03A 04A 05A 06A 07A Lab No.: 060269 02 060270 02 060271 02 060272 02 060273 02 Date Sampled: 12-Sep-2002 12-Sep-2002 12-Sep-2002 12-Sep-2002 12-Sep-2002 Apartment No. & Location 3S-F 2N-W 2N-H 2N-F 2S-W Component Units

Total Tetrachlorodibenzofurans pg 27 <1.9 <2.0 5.8 <1.7 Total Pentachlorodibenzoftirans <8.8 <1.9 <3.4 <1.5 <1.6 Total Hexachlorodibenzofurans tt 21 <1.5 <1.2 2.5 <1.1 Total Heptachlorodibenzofurans tt 57 <1.9 <1.8 II <2.1 Octachlorodlbenzofuran 53 <2.7 <2.2 9.6 4.2 Total Tetrachlorodibenzo-p-dioxins II 56 <3.7 <3.4 20 <1.3 Total Pentachlorodibenzo-p-dioxins 5.1 <3.4 <5.8 <3.4 <2.9 Total Hexachlorodibenzo-p-dioxins tt 2.9 <8.0 <11 1.7 <3.7 Total Heptachlorodibenzo-p-dioxins tt 62 <3.3 7.0 9.8 <2.0 Octachlorodibenzo-p-dioxin tt 320 16 13 68 8.6 Internal Recoveries % 2,3,7,8-T4CDF-13C12 68 65 81 72 75 2,3,7,8-T4CDD-13C12 76 73 85 85 92 1,2,3,7,8-P5CDF-13C12 76 60 86 67 83 1,2,3,7,8-P5CDD-13C12 93 67 96 76 91 1,2,3,4,7,8-H6CDF-13C12 79 79 96 86 96 1,2,3,6,7,8-H6CDD-13C12 80 77 94 90 95 1,2,3,4,6,7,8-H7CDF-13C12 78 85 97 92 97 1,2,3,4,6,7,8-H7CDD-13C12 79 82 91 93 97 OCDD-13C12 91 100 115 104 112

2,3,7,8-C14-Dibenzofuran (DB5) pg 11 <1.9 <2.0 4.0 <1.7 2,3,7,8-C14-Dibenzo-p-dioxin <3.7 <2.7 <2.5 <1.3 <1.3 1,2,3,7,8-C15-Dibenzofuran <6.5 <1.8 <3.2 <1.5 <1.5 n <7.1 <1.9 <3.5 <1.6 <1.6 2,3,4,7.8-C15-Dibenzofuran 1,2,3,7,8-C15-Dibenzo-p-dioxin <4.2 <3.4 <3.0 <2.8 <2.9 1,2,3,4,7,8-C16-Dibenzofiiran 5.2 <1.3 <1.1 <0.92 <0.97 1,2,3,6,7,8-C16-Dibenzofuran 3.0 <1.4 <1.1 <0.94 <0.99 2,3,4,6,7,8-C16-Dibenzofuran <2.7 <1.6 <1.3 <1.1 <1.2 1,2,3,7,8,9-C16-Dibenzofuran <3.3 <2.0 <1.6 <1.4 <1.4 1,2,3,4,7,8-C16-Dibenzo-p-dioxln tt <2.6 <3.2 <3.3 <1.2 <1.6 1,2,3,6,7,8-C16-Dibenzo-p-dioxin <2.6 <3.1 <3.3 <1.2 <1.6 1,2,3,7,8,9-C16-Dibenzo-p-dioxln It <2.5 <3.1 <3.2 <1.2 <1.6 1,2,3,4,6,7,8-C17-Dibenzofuran tt 33 <1.6 <1.5 5.0 <3.2 1,2,3,4,7,8,9-C17-Dibcnzofuran n <2.8 <2.3 <2.2 <2.2 <4.5 n <3.3 4.7 9.8 <2.7 1,2,3,4,6,7,8-C17-Dibenzo-p-dioxin 35 1,2,3,4,6,7,8,9-C18-Dibenzofuran 53 <2.7 <2.2 9.6 4.2 l,2,3,4,6,7,8,9-C18-Dibenzo-p-dioxin 320 16 13 68 8.6

2,3,7,8-TCDF (DB225) pg Pending Pending Folding Internal Recoveries % 2,3,7,8-TCDF-13C12 Pending Pending Pending

Client:Philip Analytical Services Inc Project:Misc.

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