Abstract: A groundwater protection system is provided for a surface impoundment or landfill wherein contaminated material is contained in a first compartment. A second compartment is located beneath the first compartment and contains a plurality of treatment materials for acting upon leakage from the first compartment. Treated leakage is collected by a drain system and is recovered therefrom for subsequent treatment and/or disposal.

Abstract: A groundwater protection system is provided for a surface impoundment or landfill wherein contaminated material is contained in a first compartment. A second compartment is located beneath the first compartment and contains a plurality of treatment materials for acting upon leakage from the first compartment. Treated leakage is collected by a drain system and is recovered therefrom for subsequent treatment and/or disposal.

Abstract: An insulative window shade assembly of the roll-up type for windows or like openings comprises a flexible sheet of shade material essentially of the size in area of the window or other opening to be insulated. The flexible sheet of material in its inoperative position is contained in a header or casing mounted at the top of the opening and extending across the width of the opening. The casing contains a spring-actuated roller upon which the sheet of shade material is wound with the leading edge protruding through a longitudinal slot or opening in the casing. The system further provides two side guides or channels mounted at the sides of the window or opening, and in which the channels contain a pile fabric to seal the sides of the flexible sheet when unrolled to the operative or insulative position.

Abstract: A chemical waste landfill comprising a plurality of compartments separated by and lined with a primary clay liner. A single integral synthetic water impervious liner is provided beneath the clay liners of all of the compartments and a primary underdrain system is provided for each compartment beneath the synthetic liner. A secondary clay liner is provided beneath the primary underdrain system and a secondary underdrain system is provided beneath the secondary clay liner. The invention also includes chemical waste landfills having in situ leachate treatment systems, increased security compartments having additional synthetic and clay liners and a leachate monitoring system comprising a plurality of standpipes interconnected by a liquid pervious means below the waste wherein the standpipes are protected by sleeves.

Abstract: The potential K.sub.2 O content of cement clinker due to the presence of potassium compounds in the raw feed mix is substantially eliminated by introducing an active agent into the kiln along with or in conjunction with the fuel used to fire the kiln. The active agent is effective to convert K.sub.2 O to KCl and preferably is a chlorinated organic waste product burned along with the fuel.