Surface areas on walls, under loose woodwork, between bricks and around other bat entryways often have a smooth, polished appearance. The stained area is slightly sticky, may contain a few bat hairs, and is yellowbrown to blackish brown in color.
cross connections What is a Cross Connection? A cross connection is a point in a plumbing system where the potable water supply is con-nected to a non-potable source. Briefly, a cross connection exists whenever the drinking water system is or could be connected to any non-potable source (plumbing fixture, equipment used in any plumbing system).
The cross connection survey is the first step in our program. Wisconsin Department of Natural Resources Regulations (NR 811.09) recommends that all industrial, commercial, and institutional facilities be surveyed for cross connections regularly (every two to six years depending on the degree of hazard within the facility).