When I talked to Sarah, she mentioned that basically the only way the Chem concentration will work, is that you will simply be forced to miss the first 2 hours of the class on Wednesday.
Consequently, she mentioned that if there was ever a time that had to be shortened or cancelled in the iSci week schedule, the Wednesday Core Lecture in the afternoon will be that one.
Someone who is planning the Chem concentration and has talked to Sarah more extensively than I have about this matter should probably confirm this.
(And also Adam, I heard from Sarah that she knows of 2 people planning that concentration, so I think there is another)