Abstract: Disclosed is a composite material having the appearance of natural stone that made from a polymer and natural aggregate. The composite material also has an antimicrobial material incorporated into it that resists the proliferation of microbes on the surface of the material. A method for producing this material is also disclosed.

Abstract: A grade-level enclosure for transformers and other electrical apparatus used in utility electric distribution systems, comprising a hollow, open-ended concrete box adapted to be partially embedded in the ground and to extend above ground level, and an open-bottomed cover for the box, whereby to complete the enclosure for the electrical apparatus, special provisions being made for supporting the apparatus in the enclosure, ventilating the enclosure interior efficiently, but preventing the insertion of foreign objects through the ventilation openings, and rendering access for installation, maintenance and servicing of the equipment easy and convenient, while at the same time providing a high degree of security against tampering or entry by unauthorized persons, and a high degree of safety against electrical shock or other injury.