An Evaluation of Radiation in Groundwater and Air, West Lake Operable Unit 1, 10/16/2015 Posted on 2015/10/162016/03/19 by stlradwastelegacy Leave a Comment on An Evaluation of Radiation in Groundwater and Air, West Lake Operable Unit 1, 10/16/2015 U.S. Department of Health and Human Services Agency for Toxic Substances and Disease Registry An Evaluation of Radiation in Groundwater and Air, West Lake Operable Unit 1