Comparison of Three Methods for Measuring Lead in Soils.

Lead poisoning of children and adults is a serious but often, preventable problem. Poisoning occurs when an individual is exposed to or ingests lead, either in a large dose or through longterm chronic exposure. Acute poisoning can result in serious illness or even death while longterm exposure can produce problems such as learning disabilities and neurological or behavioral issues. A common source of lead to which children are often exposed is lead in soil. By playing in soil contaminated with lead from old paint, gasoline additives or other sources, either natural or man-made, children can ingest lead through hand to mouth contact. The ability to quickly, easily and inexpensively screen soils for high levels of lead is one tool that can be used to help prevent further cases of lead poisoning. In this study, three "quick" extractions (Mehlich 1, Mehlich 3 and 1N Nitric Acid) were compared with EPA3051 as screening tools for easily estimating the concentration of lead (Pb) in soil. A comparison of the predictive value of the three tests as well as suggested management guidelines based on the results will be presented.