It is also used in ceramic glazes and in making other pigments. In recent years, however, because of the dangers of lead poisoning, the use of lead-based paints for interiors has largely been discontinued. Tetraethyl lead used to be the main part of the antiknock compound added to gasoline to prevent engine knocking and was considered a significant contributor to air pollution. This form of lead also settled into soils alongside heavily traveled highways, streets and roads and raised contamination concerns. All gasoline-powered automobiles now manufactured in the United States are required to operate on unleaded gasoline.
Ecology has a list of contaminated sites and files on each site with data.
Sampling and analysis of soils for lead Individuals are not required to test soils. Ask the laboratory if they are certified by Ecology. You can get approved soil collection jars from the chosen laboratory and work with lab staff to decide how to sample. Wear gloves while sampling. The sampling method you use will depend on what you want to know.