Pollution. Chemical pollution. Colorado Rocky Mountain Arsenal investigates cause of phosgene tank leak. RMN N 21, 1980 p.8 Two public meetings held on chemical wastedumping, testimony that Lowry is a geologically unsound site. RMd N 25, 1980 p.5 Continuing controversy over chemical disposal activities -- feature. RMN N 30, 1980 p.4,42 Cleaning agent from Longmont treatment plant sterilizes St. Vrain river. RMN Ja 15, 1981 p.170 County control of waste dump sites will be cause for problems. RMN0 Jy 4, 1981 p.18