Table 1008/1009-H-2-CD. Composition of headspace gases (ppm) from Site 1009. Site H Core T Sec Depth C1 C2 C3 i C4 n C4 i C5 n C5 i C6 n C6 C1/C2 C1/C2+ H2S mbsf ppm-v ppm-v 1009 A 1 H 2 1.50 3 1009 A 2 H 6 12.30 8 1009 A 3 H 5 20.30 13 1009 A 4 H 3 26.80 19 1009 A 5 H 2 34.80 21 22 1009 A 7 H 6 49.80 92 0.7 131 131 43 1009 A 8 H 6 59.30 134 0.8 168 168 40 1009 A 9 H 3 64.30 118 0.5 236 236 72 1009 A 11 H 4 78.30 352 3 117 117 5075 1009 A 12 H 1 83.30 296 0.9 329 329 3342 1009 A 13 H 5 92.30 351 3 0.3 117 106 7449 1009 A 14 H 6 103.30 232 2 0.2 116 105 4994 1009 A 15 H 3 108.30 238 2 0.2 119 108 8601 1009 A 16 H 1 111.80 232 2 116 116 3463 1009 A 17 X 3 116.80 236 2 118 118 6587 1009 A 18 X 2 125.00 393 3 0.3 131 119 9765 1009 A 19 X 5 138.90 378 4 0.4 95 86 9692 1009 A 20 X 3 145.50 302 3 0.4 0.2 101 84 2698 1009 A 22 X 2 163.00 323 6 1.4 0.8 0.4 0.8 54 34 691 1009 A 23 X 5 176.80 152 2 0.2 76 69 10796 1009 A 24 X 6 187.60 205 3 0.4 0.1 68 59 7858 1009 A 25 X 3 192.40 342 6 1 0.3 0.3 0.3 57 43 10984 1009 A 26 X 4 203.00 366 7 1 0.5 0.2 0.4 52 40 4520 1009 A 27 X 4 212.10 244 5 1 0.3 0.2 0.2 49 36 6287 1009 A 28 X 5 222.70 194 5 0.7 0.3 0.2 0.3 39 30 8231 "Notes: C1 through C6 headings represent the alkanes: methane, ethane, propane, butane, pentane, and hexane." "Iso and normal configurations of butane, pentane, and hexane are designated with i and n prefixes" respectively. C1/C2 = the methane/ethane ratio and C1/C2+ = the ratio methane/(C2 to C6). H2S = hydrogen sulfide.