Its on that page you linked; however, it's changed since I read it last: chapter 5 seems to have been deleted and replaced with a reference to the design guide. There is one chart that "assumes TJmax of 99C".
Tcase is the slug's max temp; anything higher and heat won't get pulled from the chip itself fast enough and its temp will rise beyond TJmax.
IIRC, the i5 down-clocked at 90C when stress-testing with the POS Intel cooler.
