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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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Scanned page image, NYC-WTC_000100713
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NYC 9/11 Public Portal Document

4/15/03 PASC - Certificate of Analysis Page 2 of 9

3rd 3rd 4th 4th Client ID: Floor-02 Floor-03 Floor-0 I Floor-02 Lab No.: 013658 03 013659 03 013660 03 013661 03 Date Sampled: 29-Mar-2003 29-Mar-2003 29-Mar-2003 29-Mar-2003 Component MDL Units

Total Tetrachlorodibenzofurans pg <2.6 <1.8 <1.8 4.0 Total Pentachlorodibenzofurans <4.3 <2.1 <4.1 <3.9 Total Hexachlorodibenzofurans <1.7 <1.0 <1.2 <1.4 Total Heptachlorodibenzofurans <4.4 <3.2 <1.8 <3.5 Octachlorodibenzofuran 2.6 2.3 <1.6 4.3 Total Tetrachlorodibenzo-p-dioxins 5.8 <1.8 <3.3 13 Total Pentachlorodibenzo-p-dioxins <8.6 <1.5 <1.6 <5.2 Total Hexachlorodibenzo-p-dioxins <11 <3.7 <2.8 <5.8 Total Heptachlorodibenzo-p-dioxins 5.1 4.5 <2.7 5.1 Octachlorodibenzo-p-dioxin <17 8.6 <12 32 Internal Recoveries 2,3,7,8-T4CDF-13C12 69 75 70 71 2,3,7,8-T4CDD-13012 77 88 76 76 1,2,3,7,8-P5CDF-13C12 76 87 77 73 1,2,3,7,8-P5CDD-13C12 81 92 80 77 1,2,3,4,7,8-H6CDF-13C12 100 102 94 86 1,2,3,6,7,8-H6CDD-13012 93 97 90 82 1,2,3,4,6,7,8-H7CDF-13012 97 103 93 81 1,2,3,4,6,7,8-H7CDD-13C12 94 104 95 81 OCDD-13012 77 90 85 65

2,3,7,8-C14-Dibenzofuran (DB5) pg <2.6 <1.8 <1.8 <4.0 2,3,7,8-C14-Dibenzo-p-dioxin <3.9 <1.8 <3.3 <2.6 1,2,3,7,8-C15-Dibenzofuran <4.2 <2.1 <4.0 <3.8 2,3,4,7,8-C15-Dibenzofuran <4.3 <2.2 <4.1 <3.9 1,2,3,7,8-C15-Dibenzo-p-dioxin <3.1 <1.5 <1.6 <3.4 1,2,3,4,7,8-C16-Dibenzofuran <1.5 1.2 <1.1 1.8 1,2,3,6,7,8-C16-Dibenzofuran <1.5 1.00 <1.1 <1.3 2,3,4,6,7,8-C16-Dibenzofuran <1.8 <1.1 <1.3 <1.5 1,2,3,7,8,9-C16-Dibenzofuran <1.9 <1.2 <1.4 <1.6 1,2,3,4,7,8-C16-Dibenzo-p-dioxin <2.2 <1.4 <1.6 <2.2 1,2,3,6,7,8-C16-Dibenzo-p-dioxin <2.2 <1.4 <1.6 <2.2 1,2,3,7,8,9-C16-Dibenzo-p-dioxin <2.1 <1.3 <1.6 <2.1 1,2,3,4,6,7,8-C17-Dibenzofuran <3.9 <2.9 <1.6 <3.1 1,2,3,4,7,8,9-C17-Dibenzofuran <1.6 <1.5 <1.2 <1.3 1,2,3,4,6,7,8-CI7-Dibenzo-p-dioxin 5.1 2.8 <2.7 5.1 I,2,3,4,6,7,8,9-C18-Dibenzofuran 2.6 2.3 <1.6 4.3 1,2,3,4,6,7,8,9-C18-Dibenzo-p-dioxin <17 8.6 <12 32

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

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

NYC-WTC 000100713

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NYC-WTC_000100713Source: NYC Law Department, mirrored locally

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