NYC-WTC_000232821

NYC 9/11 Public Portal Document

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Method Method Blank Client ID: Blank 10/08 Blank 10/09 Spike Lab No.: Date Sampled: 12-Sep-2002 12-Se.p-2002 Component Units

Total Tetrachlorodibenzofurans pg <4.4 <1.5 1100 Total PenLachlorodibenzofurans <10 <1.8 5300 Total Hexachlorodibenzofurans 5.4 <3.0 9100 Total Heptaehlorodibenzofurans 21 <3.3 5000 Octachlorodibenzofuran 33 <5.3 4700 Total Tetrachlorodibenzo-p-dioxins <6.0 <1.8 1000 Total Pentachlorodibenzo-p-dioxins <5.2 2700 Total Hexachlorodibenzo-p-dioxins <7.4 <2.7 7200 Total Heptachlorodibenzo-p-dioxins 21 10 2500 Octachlorodibenzo-p-dioxin 42 30 4800 Internal Recoveries % 2,3,7,8-T4CDF-13C12 74 86 86 2,3,7,8-T4CDD-13C12 77 80 81 1,2,3,7.8-P5CDF-13C12 75 86 88 1,2,3,7,8-P5CDD-13C12 80 87 90 1,2,3,4.7,8-H6CDF-13C12 74 100 93 1,2,3,6.7,8-H6CDD-13C12 78 100 95 1,2,3,4.6,7,8-H7CDF-13C12 69 98 95 1,2,3,4.6,7,8-H7CDD-13C12 80 100 95 OCDD-13C12 78 94 86

2,3,7,8-C14-Dibenzofuran (DB5) pg <4.4 <1.5 1000 2,3,7,8-C14-Dibenzo-p-dioxin <6.0 <1.8 1000 1,2,3,7.8-C15-Dibenzofuran <10 <1.8 2600 2,3,4,7-8-C15-Dibenzofuran <10 <1.9 2700 l,2,3,7.8-C15-Dibenzo-p-dioxin <5.2 <2.5 2700 1,2,3,4.7,8-C16-Dibe.nzofuran 5.2 <2.8 2400 1,2,3,6,7,8-C16-Dibenzofuran <3.7 <2.6 2200 2,3,4,6,7,8-C16-Dibenzofuran <4.5 <3.2 2400 1,2,3,7,8,9-C16-Dibenzofuran <4.7 <3.4 2100 l,2,3,4,7,8-C16-Dibenzo-j>dioxin <8.2 <3.0 2500 1,2,3,6,7,8-C16-Dibenzo-p-dioxin <7.4 <2.7 2500 l,2,3,7,8,9-C16-Dibenzo-p-dioxin <6.7 <2.5 2300 1,2,3,4,6,7,8-C17-Dibenzofuran 11 <3.0 2500 1,2,3,4.7,8,9-C17-Dibenzofuran <5.7 <3.8 2500 1,2,3,4,6,7,8-C17-Dibenzo-p-dioxin 21 6.7 2400 1,2,3,4,6,7,8,9-C18-Dibenzofuran 33 <5.3 4700 1,2,3,4.6,7,8,9-C18-Dibenzo-p-di oxin 42 30 4800

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

TEQ based on Nato Factors 10

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CITY_21MC100_011989412

NYC-WTC_000232830