The science that deals with the origin, history and structures of the earth, as recorded in the rocks, together with the forces and processes now operating to modify rocks. A record of the structure and composition of the earth encountered when drilling a well or similar type of test hole or boring. A substance formulated to kill germs or microorganisms. The germicidal properties of chlorine make it an effective disinfectant. Symptoms of the disease include diarrhea, cramps, and weight loss.
Giardia contamination is found in most surface waters and some groundwaters.
A single sample of water collected at a particular time and place which represents the composition of the water only at that time and place. The upward or downward slope of a pipeline. Any substance that appears to consist of separate granules or grains. Examples are sand and gravel. The attraction of the earth to any substance - solid, liquid or gas.