ENVIROPLUG Grout is a single-component, 30 percent solids bentonite grouting material, engineered by Wyo-Ben Inc. for use in monitor wells, earth coupled heat pump systems, water wells, grounding rod installations and hole abandonment. Its formulation allows flexibility in its mixing recipe to accommodate nearly all pumping equipment. Mixed with light agitation, its "pancake batter" consistency establishes a migration resistant low-permeability seal. Wyo-Ben Inc., Card No. 282