Shell chemical company Rocky Mountain Arsenal and Shell Chemical ordered by state Health Department to stop polluting. RMN Ap 4, 1975 p.5 Post Ap 4, 1975 p.2 Senator Gary W. Hart's Rocky Mountain Arsenal criticism inaccurate, Shell says. Post Ag 18, 1975 p.1,4 16 of 21 male employees in Denver and Mobile plants have low sperm counts after working for years with pesticides linked to sterility. Post Ag 27, 1977 p.l