More Docs, alternate B samples

Some more; consolidated index in the main post on this series of released documents.

Ex 86 - April testing of 825428 - LNDD 824 (Landis from 28-Jul)
Ex 87 - April testing of 825429 - LNDD 922 (Landis from 22-Jul)
Ex 89 - April testing of 825423 - LNDD 1193 (Aguilera control)
Ex 90 - April testing of 825425 - LNDD 1207 (Landis from 14-Jul)
Ex 92 - April testing of 993865 - LNDD 1398 (Landis from 3-Jul)
Ex 93 - April testing of 825427 - LNDD 1492 (Aguilera control)

We don't see why Ex 92 on LNDD 1488 gives no value reported for the 5aA -pdiol. There are plenty of peaks in the region on LNDD 1466/1467, including one at 1358s reading -28.28 (w/pdiol -26.94 == -1.34). Was there a peak identification problem or a perception of matrix interference? If it's matrix interference, what criteria were used to decide that had happened?

Also, on Ex 92, why was peak 3 at 881 selected as the 5aAC IS instead of peak 2 at 873, when the SOP says to adjust the pressure to the IS is at 870s. Similarly, looking at Ex 86, we don't see how on LNDD 894/895, "peak 10" at 882s was selected as the 5aAC instead of "peak 9" at 874.3s, or why the two peaks following the "peak 22" "pdiol" were not identified and computed.