Leukocyte Esterase. Leukocyte esterase is an enzyme present in most white blood cells (WBCs). A few white blood cells are normally present in urine and usually give a negative chemical test result. When the number of WBCs in urine increases significantly, this screening test will become positive.
Land subsidence occurs when large amounts of groundwater have been withdrawn from certain types of rocks, such as fine-grained sediments. The rock compacts because the water is partly responsible for holding the ground up. When the water is withdrawn, the rocks falls in on itself.
Mudslides occur in areas where the land has been destabilized by the removal of vegetation, often as a result of wildfires or human activities. Mudslides tend to occur when there is a steep slope and... Mudslides occur in areas where the land has been destabilized by the removal of vegetation, often as a result of wildfires or human activities. Mudslides tend to occur when there is a steep slope and may reoccur in the same location. The most commonly affected states in the United States include California, Oregon, Washington, Alaska and Hawaii.