"Table 9. Composition of gas in headspace or void samples derived from sediments, Site 1038." Note: HS = headspace and V = vacutainer. Sample Type* Depth (mbsf) CH4 (ppm) C2 (ppm) C3 (ppm) i-C4 (ppm) n-C4 (ppm) C5 (ppm) C6 (ppm) C7 (ppm) Benzene (ppm) Toluene (ppm) CO2 (ppm) C1/C2 C2/ Benzene 169-1038B- "7R-2, 46-51" HS 55.19 446 9 7 5 50 1.8 "8R-cc, 3-4" HS 72.13 5050 275 200 9 7 11 18 25 169-1038C- "3R-1, 80-85" HS 23.43 11510 1125 451 30 26 46 10 24 "4R-1, 46-51" HS 32.69 19986 2235 1251 164 200 314 27 9 7.1 169-1038D- "1R-1, 131-136" HS 1.34 20900 1100 445 24 53 303 33 18360 19 3.6 "2R-1, 53-58" HS 16.66 6913 559 288 31 28 188 30 3784 12 3 "3R-1, 35-40" HS 24.98 26217 1800 1041 185 162 29 3 222 19 3334 15 8.1 "4R-cc, 14-18" HS 43.6 22925 917 314 37 38 5 176 24 1710 25 5.2 169-1038E- "4R-2, 40-45" HS 32.93 6170 320 216 90 41 33 5 54 21 1622 19 5.9 169-1038F- "2R-1, 100-110" HS 10.65 2428 315 269 72 157 146 42 10 810 133 36370 8 0.4 "2R-2, 50-52" V 11.61 772230 17130 2481 142 189 38 6 79 81000 45 217 "2R-2, 80-85" V 11.93 783270 16660 2180 118 151 23 5 64 105230 47 260 "3R-2, 0-5" HS 20.63 31420 1320 518 70 132 51 11 3 505 55 84000 24 2.6 "4R-cc, 0-8" HS 34.14 10800 1230 382 17 41 487 32 50700 9 2.5 169-1038G- "3H-3, 0-5" HS 25.03 99050 2764 565 111 183 217 90 21 77 2 88732 36 35.9 "3H-4, 100-105" V 27.53 616920 16846 3240 357 406 227 51 13 195 13 357120 37 86.4 "3H-cc, 0-5" HS 31.4 30870 714 148 5 12 9 7 7 2053 341 52770 43 0.3 "4H-3, 50-55" V 35.03 641000 14188 1833 105 124 12 79 311610 45 180 "4H-3, 100-105" V 35.53 379460 9901 1482 101 126 12 48 22000 38 206 "4H-cc, 0-5" HS 41 106870 2737 671 35 94 9 2 648 33 41654 39 4.2 "5H-2, 140-150" HS 43.95 12463 326 84 7 34 16050 38 9.6 "5H-3, 100-105" V 45.03 770390 13730 1672 92 101 4 2 157800 56 "6X-2, 0-5" HS 52.03 62450 1622 263 5 8 355 14 22950 39 4.6 "6X-3, 100-105" V 54.53 907700 14294 1270 79 25 105 31320 64 136 "6X-3, 140-145" V 54.98 877000 19178 1410 89 31 84 66200 46 228 "7X-3, 0-5" HS 63.53 96240 2437 365 15 21 113 8 10880 39 21.6 "7X-3, 100-105" V 64.53 688330 12287 1274 64 35 27 29770 56 455 "7X-3, 145-150" V 64.98 820000 13090 908 34 15 14 34480 63 935 "8X-1, 56-57" HS 70.67 40965 1734 386 23 35 67 2666 24 25.9 "10X-cc, 26-34" HS 98.6 21687 1747 540 60 68 6 2 33 4416 12 52.9 169-1038H- "1X-1, 135-140" HS 1.38 1892 64 10 3806 29 "1X-2, 135-140" HS 2.88 1513 135 4 8302 11 "2X-2, 135-140" HS 14.88 1085 122 5 7965 9 "3X-3, 0-5" HS 24.53 24 1 2515 24 "4X-3, 135-140" HS 34.18 40990 1936 396 47 33 3 137 19105 21 14 "5X-5, 0-5" HS 45.13 19362 966 216 9 8 115 42515 20 8.4 "8X-cc, 19-28" HS 77.4 15200 1281 768 86 151 32 392 19 179065 12 3.3 "14X-1, 0-3" HS 125.62 4686 308 38 103 7980 15 3 "16X-cc, 17-21" HS 154.2 2899 414 349 48 42 5 4 49469 7 104 169-1038I- "1X-2, 0-5" HS 1.53 35 3 1 2489 12 "1X-3, 135-140" HS 4.38 41 4 3 6501 10 "2X-2, 0-5" HS 10.83 45736 4 41420 11434 "3H-3, 0-5" HS 20.33 34321 54 28 26380 634 "3H-3, 100-105" V 21.33 724670 63 68740 11503 "4H-3, 100-105" V 30.83 680116 81 186 6 3 32500 8396 "4H-4, 0-5" HS 31.33 23857 11 6 4 35166 2169 "5H-3, 135-140" HS 40.68 11467 63 3 26981 182 "5H-4, 100-105" V 41.83 805670 1859 655 4 165850 433 "6H-3, 135-140" HS 50.18 15927 66 11 121 29 6559 241 "7H-3, 100-105" V 59.33 785655 6126 1606 178 196 44 2 7 62835 128 875 "7H-4, 0-5" HS 59.83 15322 188 101 11 18 47 19 32 21 9407 82 6 "8X-3, 50-55" V 68.33 692919 14235 5392 558 568 137 5 23 6 97086 49 619 "8X-4, 0-5" HS 69.33 10872 709 746 166 264 138 10 63 34 12212 15 11 "9X-2, 135-140" HS 77.28 22188 1550 1335 264 415 218 20 629 737 8490 14 2.5 "11X-3, 135-140" HS 97.98 15529 863 403 96 86 17 73 35 22035 18 11.8 "11X-3, 100-105" V 97.03 373730 27508 11936 1940 1494 335 11 52 4 669361 14 529 "17x-1, 119-129" HS 152.54 19452 1380 199 239 52080 14 5.8 "19X-cc, 23-28" HS 180 7371 1476 500 21 29 236 6 16722 5 6.2 "20X-cc, 29-34" HS 189.5 5489 913 373 15 15 399 62 62884 6 2.3 "21X-1, 140-150" HS 198 11602 1824 889 202 115 20 415 118 145774 6 4.3 "28X-2, 0-5" HS 258.63 5209 182 117 38 17 18 2 37 22 52010 29 4.9 "29X-2, 100-105" V 269.23 484160 2976 557 96 34 11 262490 163 "29X-3, 100-105" V 270.73 633940 3266 606 95 43 11 222480 194 "29X-3, 135-140" HS 271.03 59700 385 132 37 20 32 6 75 92 57546 155 5.1 "29X-3, 140-150" HS 271.13 10420 134 156 54 29 28 4 40 32 94780 78 3.4 "29X-4, 50-55" V 271.73 516430 3026 546 92 31 10 280010 171 1 "30X-2, 0-5" HS 277.93 6721 213 134 10 26 16 3 207 92 31060 32 197 "30X-3, 100-105" V 280.43 472800 5332 1565 217 275 117 10 27 283230 89 3.7 "31X-2, 135-140" HS 288.98 4748 247 252 36 70 22 4 66 27 58740 19 538 "31X-3, 150-155" V 290.6 516000 4838 1093 121 119 21 2 9 275600 107 2.6 "32X-1, 135-140" HS 297.08 4085 102 88 13 11 10 39 25 44630 40 102 "32X-3, 50-55" V 299.23 507890 2250 458 66 34 12 2 22 6 197403 226 32X-3 100-105 V 299.73 655600 2504 484 70 26 10 92340 262 "33X-4, 0-5" HS 309.83 7728 61 66 10 8 15 3 17 18 36732 127 3.6 "33X-5, 50-55" V 311.83 667230 958 342 39 14 5 178800 696 "34X-4, 0-5" HS 319.43 6231 30 37 28 7 50 18 29 42 66349 208 1 "34X-4, 50-55" V 319.93 4577 600 436 77 42 15 280350 8 "35X-2, 0-5" HS 326.03 3672 11 18 4 3 20 5 11 32260 334 1 "35X-2, 100-105" V 327.03 804700 461 402 80 28 22 2 248660 1746 "36X-1, 135-140" HS 335.48 4928 25 30 9 7 58 27 26 45 53000 197 1 "37X-3, 0-5" HS 346.73 3730 13 47 9 7 40 11 34 63 33400 287 0.4 "37X-4, 100-105" V 349.23 427500 273 211 17 8 5 83000 1566 "38X-1, 135-140" HS 354.68 6775 42 43 15 11 63 2 2 24 55 82045 161 1.8 "38X-1, 150-155" V 354.83 477240 432 263 35 12 6 140030 1105 "39X-3, 0-5" HS 365.93 8233 63 92 29 22 65 8 63 94 75950 131 1 "39X-4, 100-105" V 368.43 814550 911 277 40 16 6 231630 894 "40X-2, 0-5" HS 374.03 67224 97 293 13 8 46 4 205 569 46270 693 0.5 "40X-5, 100-105" V 379.53 341020 72 24 9 4 239750 "41X-2, 0-5" HS 383.63 8668 69 68 34 14 69 4 22 55 68000 126 3.1 "42X-3, 135-140" HS 396.18 5200 137 191 121 62 105 11 3 40 68 78250 38 3.4 "43X-1, 90-100" HS 402.35 5354 336 432 233 171 228 34 8 54 66 120740 16 6.2 "* HS = headspace, V=vacutainer"