A drilled well consists of a hole bored into the ground, with the upper part being lined with casing. The casing prevents the collapse of the borehole walls and (with a drive shoe or grout seal) prevents surface or subsurface contaminants from entering the water supply.The casing also provides a housing for a pumping mechanism and for the pipe that moves water from the pump to the surface. drilled well consists of a hole bored into the ground, with the upper part being lined with casing. The casing prevents the collapse of the borehole walls and (with a drive shoe or grout seal) prevents surface or subsurface contaminants from entering the water supply.
Hives and angioedema can be caused by: 1  Foods. Many foods can trigger reactions in people with sensitivities. 2  Medications. Almost any medication may cause hives or angioedema. 3  Common allergens. Other substances that can cause hives and angioedema include pollen, animal dander, latex and insect stings.  Environmental factors.
About Hives (urticaria). We explain the hives, the most common causes, symptoms, body parts most likely affected, treatment, & tips for controlling urticaria. The hives (urticaria) is a harmless type of rash or skin allergy that is usually caused by an allergy.The rash consists of circular, raised welts on the skin that are usually itchy and occur in batches. Hives can vary in size, from a few millimeters to several centimeters in diameter.he most common skin allergy triggers that cause hives include: â¢ Medication such as antibiotics, codeine, penicillin, sulfa, anticonvulsant drugs, phenobarbital, and aspirin. â¢ Foods like shellfish, nuts, tomatoes, soy, chocolate, and berries. â¢ Pollen.