Table 7. Gas composition of samples from the PCS at Site 997. Volume Core Sample Split (mL) Cum. (mL) C1 (ppmv) C2 (ppmv) C3 (ppmv) i-C4 (ppmv) n-C4 (ppmv) i-C5 (ppmv) n-C5 (ppmv) i-C6 (ppmv) n-C6 (ppmv) n-C7 (ppmv) C1/C2 C1/C2+ N2 (vol%) O2 (vol%) CO2 (ppmv) 164-997A- 18P G1 30 30 12964 14 0.3 0.3 0.6 0.1 0.3 926 831 0.05 0.04 494 G3 95 270 173055 9 5 20.3 11.4 2.5 0.4 9.8 20123 2989 14.3 3.4 16 G4 180 450 581537 23 12 26.7 7.2 6.9 0.1 0.3 25846 7682 0.3 0 7630 25P G1 45 45 3187 12 26.7 7.2 6.9 60 1.4 0.5 521 G2 15 60 24448 7 16.9 9.2 0.5 0.3 G3 660 750 954449 117 10 14.7 10 3.9 0.3 36.8 8151 4940 0.2 0 G4 340 6880 948136 141 6 6.3 1.5 7.2 0.5 0.3 6729 5820 0.1 0 G5 125 7005 941170 140 6 7.2 2.1 7.5 0.6 0.4 9.4 6723 5425 0.1 0.1 33P G1 115 115 165527 67 528 521 1134 29 1.5 0.3 0.2 2471 73 13.8 3 3903 G2 110 265 252934 30 528 8574 454 4.1 1 2035 40P G1 175 175 526309 99 11 20.6 0.2 4.4 0.5 6.6 5338 3714 3.7 1.1 3803 49P G1 110 110 2726 1 1.2 2.8 0.3 556 3.9 1.1 463 G2 55 185 672426 209 7.2 6.3 3.4 0.2 0.3 2.2 3217 2941 2 0.6 2512 G3 540 725 923753 272 8.6 4 3396 3246 0.1 0 4242 G4 540 1265 950344 296 4.2 1.4 6 0.4 0.6 3211 3080 0.1 0.1 4350 G5 290 1755 929239 320 3.5 1.4 6 0.3 1.1 2904 2796 0.1 0.1 3622 G6 305 1860 897917 317 2833 2833 0.1 0.1 4034 G7 685 2695 905328 306 4 1.1 8.5 0.7 2959 2827 0.1 0 8626 G8 1190 3885 931182 345 3.6 5.5 2699 2630 0.1 0.1 6543 G9 535 6645 873598 404 3.9 9.9 2162 2091 0.2 0.1 34923 G10 165 6950 512814 252 3 0.04 7.1 0.5 0.3 1 2035 1943 2 0.3 10290 55P G1 440 440 745193 396 19 6 1 1882 1766 6 1.7 2125 G2 690 1130 903547 482 5 2.2 1.2 0.3 25.9 1873 1748 0.2 0.4 4180 G3 670 1800 920593 593 1.8 0.6 1.4 0.7 0.4 1552 1540 0.1 0.3 5339 G4 560 2360 927895 646 1.3 0.6 1.2 1436 1430 0.1 0.3 5481 G5 175 3135 973814 682 5 1.3 71 2.3 1428 1279 0 0.2 6611 G6 565 3700 949175 676 4 2.2 1.7 2.6 1404 1384 0.1 0.2 11203 G7 630 5230 949178 688 5 2.2 1.7 2.6 1380 1356 0.1 0.2 27232 G9 280 6100 928040 591 27 97 35 1.9 1570 1234 5.8 1 8010 G10 280 6380 870695 566 71 306 117 4 1 64 1538 771 10.2 0.9 6073 164-997B- 10P G1 130 130 24345 13 2 357 24.7 95.3 1873 49 6 1.5 850 G2 620 750 762920 269 25 246 18.4 6.6 1.1 73.2 2840 1195 0.8 0.4 5708 G4 465 2370 923647 23 60.1 8.5 8.5 1.1 0.5 0.5 79.6 G6 470 2945 924586 417 14 73.4 5.7 6.9 1 39.5 2217 1658 G7 465 3410 929592 417 16 58.7 6.2 6.9 1.2 36.8 2229 1714 0.1 0 6612 G8 465 3875 917494 420 18 85.2 8.1 6.7 1.3 44 2185 1573 0.2 0.2 6749 G9 445 4320 900842 410 16 121 11 6.6 1.1 29.8 2195 1510 1.4 0.4 7444 G10 575 4895 894195 416 19 151 12.3 7.2 1.6 35.6 2149 1389 1.8 0.3 12575 G11 140 5035 871929 402 17 286 19.5 6.6 1.3 67.2 2167 1091 4.4 0.5 7624 G12 90 5125 781399 382 18 288 19.6 6.4 1.3 77.8 2044 985 12.5 2.3 5043 15P G1** 30 30 606799 314 15 229 16.3 5.6 0.9 73.2 1934 928 26.2 5.7 3596 G2 500 540 874613 340 234 277 19 4 0.7 64 2572 932 3.1 0.9 8998 G3 1065 1605 860744 429 10 148 10 3.4 30 2008 1366 0.8 0.4 9807 G4 510 2115 878845 436 11 37 4.2 4.2 2.3 30 2016 1675 0.1 0.2 10037 G5 430 2545 850141 442 12 66 7 5.4 1.1 55 1925 1446 0.7 0.4 13618 G6 525 3070 874108 449 15 48 5.5 5.3 1.5 52 1948 1518 0.5 0.4 21055 G7 20 3090 976319 407 152 11.6 6.6 1 38 2397 1584 2.8 0.7 17823 21P G1 85 85 17517 13 3 488 22 1.5 1 18 1317 32 4.2 1.2 2439 G2 85 170 8006 5 3 618 39.5 3.7 84.7 1740 11 10.7 2.5 1264 G3 390 560 915858 411 22 294 20 4 1.2 52.9 2230 1139 1.2 0.5 8034 G4 960 1520 957771 405 18 173 11.8 2.7 3.4 1.1 20.8 2368 1508 0.1 0.2 9642 G5 625 2145 924014 406 16 62.5 6.1 3.8 1 2279 1867 0.1 0.1 14188 G6 530 2675 890910 374 14 41.3 3.6 3 2.3 0.9 23 2382 1928 0.1 0.1 13979 G7 440 3115 893655 335 14 51.9 4.9 3.7 1.1 2665 2175 0.1 0.1 20651 29P G1 110-1 110 524 3.7 77.9 19 575 G2 110-2 110 28389 15 1 12.6 1.4 0.2 0.2 23.4 1893 531 32P G1 45 45 6604 4 1 26.1 2.7 43.5 1834 86 2.8 0.9 730 G2 25 70 13662 8 4 726 58 1 0.2 0.1 0.2 120 1646 15 34.2 6.5 1128 36P G1 70 70 6603 4 26 2.7 1 0.1 0.2 43.5 1785 86 3.6 1.1 1024 G2 50 120 25730 35 12 257 26 1.5 239 731 45 32.3 6.7 1570 40P G1 70 70 3051 2 53 4 1.3 36.2 1453 32 731 44P G1 50 50 1282 2 7.7 0.8 15.6 855 50 17.3 6.9 282 G3 10 75 13235 8 4 634 32.7 13.2 1697 19 49.3 10.7 724 "Note: Cum. = cumulative volume. Gas samples taken from the PCS are designated (e.g., G1) in the order in which they were collected. All samples analyzed by the NGA. ** The manifold was not purged with He before it was connected to Core 164-997B-15P."