NYC-WTC_000231878

NYC 9/11 Public Portal Document

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Method Blank 3rd 3rd 3rd Client ID: Blank Spike Floor-07 Floor-08 Floor-09 R03030259. -OlA -02A -03A Lab No.: 009192 03 009192 03 % 009193 03 009194 03 009195 03 Date Sampled: 05-Mar-2003 05-Mar-2003 Recovery 05-Mar-2003 05-Mar-2003 05-Mar-2003 Component MDL Units

Total Tetrachlorodibenzofurai pg <1.2 1100 <2.4 <1.4 Total Pentachlorodibenzofura <1.5 5400 <1.3 <1.7 <1.9 Total Hexachlorodibenzofurai <1.5 11000 <2.6 <1.5 <1.9 Total Heptachlorodibenzofura <2.8 5200 <6.8 4.2 <3.1 Octachlorodibenzofuran <5.3 5400 14 6.2 6.3 Total Tetrachlorodibenzo-p-di <1.5 940 2.2 <1.6 <2.9 Total Pentachlorodibenzo-p-d <1.4 2700 <6.0 <1.4 <1.9 Total Hexachlorodibenzo-p-di <1.6 7700 4.6 <2.1 <6.8 Total Heptachlorodibenzo-p-d 12 2600 31 5.9 15 Octachlorodibenzo-p-dioxin 38 5300 130 41 43 Internal Recoveries % 2,3,7,8-T4CDF-13C12 80 77 80 81 83 2,3,7,8-T4CDD-13C12 88 82 86 93 94 1,2,3,7,8-P5CDF-13C12 86 92 76 81 88 1,2,3,7,8-P5CDD-13C12 85 83 72 75 85 1,2,3,4,7,8-H6CDF-13C12 100 91 91 97 102 1,2,3,6,7,8-H6CDD-13C12 97 88 84 91 97 1,2,3,4,6,7,8-H7CDF-13C12 114 101 89 100 109 1,2,3,4,6,7,8-H7CDD-13C12 111 97 82 96 105 OCDD-13C12 96 87 73 84 85

2,3,7,8-C14-DibenzofLiran (DI pg <1.2 1100 107 <3.5 <1.4 <2.2 2,3,7,8-C14-Dibenzo-p-dioxin 940 111 <2.4 <1.6 1,2,3,7,8-C15-Dibenzofuran <1.5 2800 107 <1.3 <1.7 <1.8 2,3,4,7,8-C15-Dibenzofuran <1.5 2700 103 2.0 <1.7 <1.9 l,2,3(7,8-C15-Dibenzo-p-diox <1.4 2700 102 <1.6 <1.4 <1.9 1,2,3,4,7,8-C16-Dibenzofuran <1.4 2600 105 <2.4 <1.4 <1.7 1,2,3,6,7,8-C16-Dibenzofuran <1.4 2500 111 <1.2 <1.3 <1.7 2,3,4,6,7,8-C16-Dibenzofuran <1.6 2600 104 <1.4 <1.5 <1.9 1,2,3,7,8,9-C16-Dibenzofuran <1.9 2800 104 <1.6 <1.8 <2.3 l,2,3,4,7,8-C16-Dibenzo-i>dii <1.5 2600 107 <1.3 <2.0 <1.8 l,2,3,6,7,8-C16-Dibcnzo-i>dii <1.7 2500 94 <1.5 <2.2 <2.0 l,2,3,7,8,9-C16-Dibenzo-i>dii <1.6 2600 107 <1.4 <2.0 <1.8 1,2,3,4,6,7,8-Cl7-Dibenzofuri <2.5 2600 102 <6.0 4.5 <2.8 1,2,3,4,7,8,9-Cl7-Dibenzofuri <3.3 2600 101 <7.2 <2.8 <1.9 l,2,3,4,6,7,8-C17-Dibenzo-p-( 6.0 2600 103 14 5.9 6.8 1,2,3,4,6,7,8,9-C18-Dibenzof 5400 102 14 6.2 6.3 1,2,3,4,6,7,8,9-C18-Dibenzo-] 38 5300 106 130 41 43

2,3,7,8-TCDF (DB225) pg <5.4 <6.9 <2.8 <2.9 Internal Recoveries % 2,3,7,8-TCDF-13C12 69 71 73 73

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CITY_DEP_WORBY_CANNATA_SUBP_000051831

NYC-WTC_000231879