The pre-2006 version of the problem set is called Chemistry 106, problem set VII, stratospheric chemistry, pre-2006 version, Object File Name cer00200.pdf.
Webpages converted to pdf from Pomona College Chemistry Department Index to the Pages Administered by Wayne E. Steinmetz, a.k.a. Der Feldmarschall http://pages.pomona.edu/~wsteinmetz/ , 5. Chemistry 106 [previously Chemistry 6] (Environmental Chemistry) Homepage, Problem Set VII (2006 version, catalytic cycles involving ozone).