Put a large mulched circle over the roots of new trees and shrubs, but do not mound bark mulch up around the trunk. Trees and shrubs grown under mulch develop stronger roots and are healthier. Be aware that mulch should be no more than 2-3 inches total or plant health can suffer.
Lead dust can form when lead-based paint is dry scraped, dry sanded, or heated. Dust also forms when painted surfaces bump or rub together. Lead chips and dust can get on surfaces and objects that people touch. Settled lead dust can re-enter the air when people vacuum, sweep, or walk through it.