Information also is offered about tips on how to check soils for lead contamination and tips on how to interpret the results of such testing. Finally, a number of measures are outlined that can cut back publicity to soil lead and prevent lead poisoning and its associated well being dangers. Lead occurs naturally in soils, typically at concentrations that vary from 10 to 50 mg/kg . These concentrations frequently range from one hundred fifty mg/kg to as excessive as 10,000 mg/kg at the base of a house painted with lead-primarily based paint. Lead does not biodegrade, or disappear over time, however stays in soils for 1000’s of years.
Then collect a 1-inch-broad sample from the center of this slice that reaches from the soil surface to a depth of 6 inches. Take eight-12 samples from a given area, put them collectively in a clean plastic bucket, and mix nicely. Put the air-dried pattern in a clear plastic bag and seal and label it. Select websites–Take samples from areas you think might have lead contamination such as near roadways or the base of an older house. Also collect samples from high-publicity areas similar to backyard sites and play areas.
You also ought to request analysis of pH, lime requirement, and soil phosphorus. If you need assistance deciphering the report you obtain from the testing lab, contact your local extension office. Collect pattern–In undisturbed areas, acquire soil from the upper 1-2 inches of the soil. In areas the place the soil has been disturbed, and in flower beds and vegetable gardens, gather 6-inch-deep samples. If a soil auger or corer isn’t out there, use a shovel to dig a 6-inch-deep gap such that one aspect exposes a clean vertical area of soil. Shave a 1-inch-thick slice of soil from this face, preserving it on the shovel.
Soils around older houses or close to roadways may be contaminated and ought to be examined. Several laboratories in Pennsylvania, including Penn State’s Agricultural Analytical Services Laboratory, have the services to conduct these exams. Contact your county extension agent or look in the telephone book under “Laboratories” to obtain information about testing laboratories that supply this service to your area. Some lead added to soil may mix with different soil components to form lead-containing minerals. One such mineral that has extraordinarily low solubility is lead phosphate . This truth sheet supplies some background details about how lead behaves in soil. It explains how soils turn into contaminated with lead and how persons are uncovered to guide in soils.