NYC-WTC_000232785

NYC 9/11 Public Portal Document

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Method Blank Client ID: Blank Spike Lab No.: 013656 03 013656 03 % Date Sampled: 29-Mar-2003 29-Mar-2003 Recovery Component MDL Units

Total Tetrachlorodibenzofurans pg <1.2 1100 Total PenLachlorodibenzofurans 5.9 5700 Total Hexachlorodibenzofurans 3.0 9700 Total Heptaehlorodibenzofurans <4.4 4800 Octachlorodibenzofuran 12 4400 Total Tetrachlorodibenzo-p-dioxins <1.4 960 Total Pentachlorodibenzo-p-dioxins <1.6 2500 Total Hexachlorodibenzo-p-dioxins 4.4 7600 Total Heptachlorodibenzo-p-dioxins 7.3 2300 Octachlorodibenzo-p-dioxin <12 5000 Internal Recoveries % 2,3,7,8-T4CDF-13C12 74 73 2,3,7,8-T4CDD-13C12 82 81 1,2,3,7.8-P5CDF-13C12 83 85 1,2,3.7,8-P5CDD-13C12 96 97 1,2,3,4,7,8-H6CDF-13C12 103 95 1,2,3,6.7,8-H6CDD-13C12 101 98 1,2,3,4.6,7,8-H7CDF-13C12 107 103 1,2,3,4.6,7,8-H7CDD-13C12 111 114 OCDD-13C12 102 107

2,3,7,8-C14-Dibenzofuran (DB5) pg <1.2 1100 108 2,3,7,8-C14-Dibenzo-p-dioxin <1.4 960 96 1,2,3,7.8-C15-Dibenzofuran 2.3 2700 110 2,3,4,7,8-C15-Dibenzofuran 3.6 2900 118 l,2,3,7-8-C15-Dibenzo-p-dioxin <1.6 2500 102 1,2,3,4.7,8-C16-Dibe.nzofuran <2.7 2500 98 1,2,3,6,7,8-C16-Dibenzofuran <2.7 2400 96 2,3,4,6,7,8-C16-Dibenzofuran 3.2 2500 99 1,2,3,7,8,9-C16-Dibenzofuran <3.4 2300 94 l,2,3,4,7,8-C16-Dibenzo-j>dioxin <2.8 2600 104 1,2,3,6,7,8-C16-Dibenzo-p-dioxin 4.4 2500 101 l,2,3,7,8,9-C16-Dibenzo-p-dioxin <2.7 2500 98 1,2,3,4,6,7,8-C17-Dibenzofuran <4.0 2500 99 1,2,3,4.7,8,9-C17-Dibenzofuran <4.8 2300 94 1,2,3,4,6,7,8-C17-Dibenzo-p-dioxin 7.3 2300 92 1,2,3,4,6,7,8,9-C18-Dibenzofuran 12 4400 88 1,2,3,4.6,7,8,9-C18-Dibenzo-p-di oxin <12 5000 100

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

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CITY_21MC100_009480064

NYC-WTC_000232789