NYC-WTC_000232785

NYC 9/11 Public Portal Document

LDDDCD"DTDiDmDeDsC aNDeDwa □RnoDmDaDnD.nBDoDindn □lDtDaDlDiDcD"DlD4DPDADSD

11 th Floor 11th Floor 11th Floor Client ID: Down-01 Down-02 Down-03 Lab No.: 013684 03 013685 03 013686 03 Date Sampled: 29-Mar-2003 29-Mar-2003 29-Mar-2003 Component MDL Units

Total Tetrachlorodibenzofurans pg 6.0 <1.7 <2.4 Total PenLachlorodibenzofurans <2.8 <2.6 <3.0 Total Hexachlorodibenzofurans <1.9 <1.7 <1.8 Total Heptaehlorodibenzofurans <3.0 <1.4 <2.2 Octachlorodibenzofuran <4.8 <2.2 3.2 Total Tetrachlorodibenzo-p-dioxins 31 <3.0 <3.8 Total Pentachlorodibenzo-p-dioxins <12 <2.0 <2.7 Total Hexachlorodibenzo-p-dioxins 11 <4.2 <7.3 Total Heptachlorodibenzo-p-dioxins 4.4 3.7 <2.5 Octachlorodibenzo-p-dioxin 29 <9.7 12 Internal Recoveries % 2,3,7,8-T4CDF-13C12 87 78 83 2,3,7,8-T4CDD-13C12 84 86 86 1,2,3,7.8-P5CDF-13C12 83 86 86 1,2,3,7,8-P5CDD-13C12 87 96 96 1,2,3,4.7,8-H6CDF-13C12 99 105 107 1,2,3,6.7,8-H6CDD-13C12 93 101 101 1,2,3,4.6,7,8-H7CDF-13C12 90 103 101 1,2,3,4.6,7,8-H7CDD-13C12 84 104 102 OCDD-13C12 65 85 80

2,3,7,8-C14-Dibenzofuran (DBS) pg <6.0 <1.7 <2.4 2,3,7,8-C14-Dibenzo-p-dioxin <3.0 <3.8 1,2,3,7.8-C15-Dibenzofuran <2.8 <2.5 <2.9 2,3,4,7,8-C15-Dibenzofuran <2.9 <2.6 <3.0 l,2,3,7.8-C15-Dibenzo-p-dioxin <3.7 <2.0 <2.7 1,2,3,4.7,8-C16-Dibe.nzofuran <1.7 <1.6 <1.6 1,2,3,6,7,8-C16-Dibenzofuran <1.7 <1.6 <1.6 2,3,4,6,7,8-C16-Dibenzofuran <2.1 <1.9 <1.9 1,2,3,7,8,9-C16-Dibenzofuran <2.2 <2.0 <2.0 l,2,3,4,7,8-C16-Dibenzo-j>dioxin <2.1 <2.5 <2.6 1,2,3,6,7,8-C16-Dibenzo-p-dioxin <2.1 <2.4 <2.5 l,2,3,7,8,9-C16-Dibenzo-p-dioxin <2.0 <2.3 <2.4 1,2,3,4,6,7,8-C17-Dibenzofuran <3.0 <1.2 <2.2 1,2,3,4.7,8,9-C17-Dibenzofuran <2.4 <1.6 <2.4 1,2,3,4,6,7,8-C17-Dibenzo-p-dioxin 4.4 3.7 <2.0 1,2,3,4,6,7,8,9-C18-Dibenzofuran <4.8 <2.2 3.2 1,2,3,4.6,7,8,9-C18-Dibenzo-p-di oxin 29 <9.7 12

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

RDCDlDiDeDnDtD:DPDhDiDlDiDpD □ADnDaDlDyDtDiDcDaDlD □SDeDrDvDilcDeDsD DIDnCcD □ PDrDoDjDeEcDtD:DJDLDCD DEDna

CITY_21MC100_009480074

NYC-WTC_000232799