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Document / 10 pages

Airborne silica analysis order form, EMSL Analytical Inc., Apr 2003

Machine-extracted title · confidence 90%

Laboratory order form for analyzing airborne crystalline silica samples collected from 114 Liberty Street.

NYC-WTC_000100712–000100721

Folder label: “114 LIBERTY STREET 1001041, 52/7502

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NYC 9/11 Public Portal Document

4/15/03 PASC - Certificate of Analysis Page 8 of 9

11th Floor 11th Floor 11th Floor 11th Floor Client ID: Up-02 Up-03 Down-Ol Down-02 Lab No.: 013682 03 013683 03 013684 03 013685 03 Date Sampled: 29-Mar-2003 29-Mar-2003 29-Mar-2003 29-Mar-2003 Component MDL Units

Total Tetrachlbrodibenzofurans pg <1.3 <1.5 6.0 <1.7 Total Pentachlorodibenzofurans <2.8 <2.6 <2.8 <2.6 Total Hexachlorodibenzofurans <2.4 <1.8 <1.9 <1.7 Total Heptachlorodibenzofurans <2.5 <2.3 <3.0 <1.4 Octachlorodibenzofuran 3.1 <2.3 <4.8 <2.2 Total Tetrachlorodibenzo-p-dioxins <2.1 <2.7 31 <3.0 Total Pentachlorodibenzo-p-dioxins <2.2 <2.2 <12 <2.0 Total Hexachlorodibenzo-p-dioxins <2.6 <1.8 11 <4.2 Total Heptachlorodibenzo-p-dioxins 3.9 <3.1 4.4 3.7 Octachlorodibenzo-p-dioxin 9.4 7.1 29 <9.7 Internal Recoveries 2,3,7,8-T4CDF-1 3C1 2 81 74 87 78 2,3,7,8-T4CDD-13C1 2 88 81 84 86 1,2,3,7,8-P5 CDF-13C12 90 81 83 86 1,2,3,7,8-P5CDD-13C12 105 88 87 96 1,2,3,4,7,8-H6CDF- I 3C12 104 101 99 105 1,2,3,6,7,8-H6CDD-I3C 12 102 97 93 101 1,2,3,4,6,7,8-H7CDF-13C1 2 111 94 90 103 1,2,3,4,6,7,8-H7CDD-13C1 2 118 89 84 104 OCDD-13C I2 118 72 65 85

2,3,7,8-C14-Dibenzofuran (DB5) pg <1.3 <1.5 <6.0 <1.7 2,3, 7,8-C14-Dibenzo-p-dioxin <2.1 <2.7 <3.3 <3.0 1,2,3,7,8-CI5-Dibenzofuran <2.7 <2.6 <2.8 <2.5 2,3,4, 7,8-C15-Dibenzofuran <2.9 <2.7 <2.9 <2.6 1,2,3,7,8-C15-Dibenzo-p-dioxin <1.4 <2.2 <3.7 <2.0 1,2,3,4,7,8-C16-Dibenzofuran <2.2 <1.6 <1.7 <1.6 1,2,3,6,7,8-C16-Dibenzofuran <2.2 <1.6 <1.7 <1.6 2,3,4,6,7,8-C16-Dibenzofuran <2.6 <1.9 <2.1 <1.9 1,2,3,7,8,9-C16-Dibenzofuran <2.8 <2.0 <2.2 <2.0 1,2,3,4,7,8-C16-Dibenzo-p-dioxin <2.7 <1.8 <2.1 <2.5 1,2,3,6,7,8-C16-Dibenzo-p-dioxin <2.7 <1.8 <2.1 <2.4 1,2,3,7,8,9-C16-Dibenzo-p-dioxin <2.6 <1.7 <2.0 <2.3 1,2,3,4,6,7,8-C17-Dibenzofuran <2.3 <2.0 <3.0 <1.2 1,2,3,4,7,8,9-C17-Dibenzofuran <2.5 <2.6 <2.4 <1.6 1,2,3,4,6,7,8-CI7-Dibenzo-p-dioxin 3.9 <3.1 4.4 3.7 1,2,3,4,6,7,8,9-C18-Dibenzofuran 3.1 <2.3 <4.8 <2.2 1,2,3,4,6,7,8,9-C18-Dibenzo-p-dioxin 9.4 7.1 29 <9.7

2,3,7,8-TCDF (DB225) pg - - Pending Internal Recoveries 2,3,7,8-TCDF-13C1 2 Pending -

Preliminary Report Client:Philip Analytical Services Inc Project:JLC Environmental

NYC-WTC 000100719

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NYC-WTC_000100719Source: NYC Law Department, mirrored locally

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