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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 ofAnalysis. Page 5 of 9

7th 7th 8th 8th Client ID: Floor-02 Floor-03 Floor-01 Floor-02 Lab No.: 013670 03 013671 03 013672 03 013673 03 Date Sampled: 29-Mar-2003 29-Mar-2003 29-Mar-2003 29-Mar-2003 Component MDL Units

Total Tetrachlorodibenzofurans pg <2.1 <1.7 <3.9 <2.1 Total Pentachlorodibenzofurans <3.6 <2.2 <3.6 <4.5 Total Hexachlorodibenzofurans <1.3 <1.1 <1.7 <1.5 Total Heptachlorodibenzofurans <1.8 <1.3 <2.7 <3.5 Octachlorodibenzofuran <2.0 <1.4 4.3 <3.2 Total Tetrachlorodibenzo-p-dioxins <2.6 <1.6 13 <2.7 Total Pentachlorodibenzo-p-dioxins <2.5 <2.3 <3.5 <3.6 Total Hexachlorodibenzo-p-dioxins - <3.0 <1.5 <5.2 <6.9 Total Heptachlorodibenzo-p-dioxins 3.3 <1.7 4.5 8.0 Octachlorodibenzo-p-dioxin 7.9 <4.3 24 16 Internal Recoveries % 2,3,7,8-T4CDF-13C12 53 58 64 70 2,3,7,8-T4CDD-13C12 61 67 71 76 1,2,3,7,8-P5CDF-13C12 68 75 73 78 1,2,3,7,8-P5CDD-13C12 76 86 82 85 1,2,3,4,7,8-H6CDF-13C12 89 97 82 88 1,2,3,6,7,8-H6CDD-13C12 83 96 82 90 1,2,3,4,6,7,8-H7CDF-13C12 87 101 84 91 1,2,3,4,6,7,8-H7CDD-13C12 89 105 85 94 OCDD-13C12 77 91 68 83

2,3,7,8-C14-Dibenzofuran (DB5) pg <2.1 <1.7 <3.9 <2.1 2,3,7,8-C14-Dibenzo-p-dioxin <2.6 <1.6 <4.2 <2.7 1,2,3,7,8-CI5-Dibenzofuran <3.6 <2.2 <3.6 <4.4 2,3,4,7,8-C15-Dibenzofuran <3.7 <2.3 <3.6 <4.5 1,2,3,7,8-C15-Dibenzo-p-dioxin <2.5 <2.3 <3.5 <3.6 1,2,3,4,7,8-C16-Dibenzofuran <1.2 <1.00 <1.6 <1.4 1,2,3,6,7,8-C16-Dibenzofuran <1.2 <0.99 <1.6 <1.3 2,3,4,6,7,8-C16-Dibenzofuran <1.4 <1.2 <1.9 <1.6 1,2,3,7,8,9-C16-Dibenzofuran <1.5 <1.2 <2.0 <1.7 1,2,3,4,7,8-C16-Dibenzo-p-dioxin <1.9 <1.5 <2.4 <1.7 1,2,3,6,7,8-C16-Dibenzo-p-dioxin <1.9 <1.5 <2.4 <1.7 1,2,3,7,8,9-CI6-Dibenzo-p-dioxin <1.8 <1.5 <2.3 <1.6 1,2,3,4,6,7,8-C17-Dibenzofuran <1.6 <1.2 <2.4 <3.1 1,2,3,4,7,8,9-C17-Dibenzofuran <1.4 <1.3 <1.4 <1.5 1,2,3,4,6,7,8-C17-Dibenzo-p-dioxin 3.3 <1.7 4.5 4.9 1,2,3,4,6,7,8,9-C18-Dibenzofuran <2.0 <1.4 4.3 <3.2 1,2,3,4,6,7,8,9-CI8-Dibenzo-p-dioxin 7.9 <4.3 24 16

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

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

NYC-WTC 000100716

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NYC-WTC_000100716Source: NYC Law Department, mirrored locally

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