<Table> <Tr> <Td> </Td> <Td> This section contains instructions, advice, or how - to content . The purpose of Wikipedia is to present facts, not to train . Please help improve this article either by rewriting the how - to content or by moving it to Wikiversity, Wikibooks or Wikivoyage. (April 2017) </Td> </Tr> </Table> <Tr> <Td> </Td> <Td> This section contains instructions, advice, or how - to content . The purpose of Wikipedia is to present facts, not to train . Please help improve this article either by rewriting the how - to content or by moving it to Wikiversity, Wikibooks or Wikivoyage. (April 2017) </Td> </Tr> <P> Humans can be poisoned during unsafe renovations or repainting jobs on housing that has lead paint . Therefore, homeowners are encouraged to carefully stabilize any deteriorated (peeling, chipping, cracking, etc .) paint in a lead - safe manner . More than 250,000 children in the United States have significantly harmful levels of lead in their bodies . There is no safe level of exposure . </P> <P> Working in a lead - safe manner means avoiding dry sanding, dry scraping, removing paint by torching / burning, the use of heat guns over 1100 ° F, machine - sanding or grinding without HEPA filtered dust collection or HEPA - filtered vacuum . These methods are now prohibited by the United States Department of Housing and Urban Development (HUD) because they have been proved to create significant levels of lead dust during remodeling, renovation and painting . They must be avoided, especially in properties where children under age six reside . Adult workers using unsafe work practices or improper protective gear may also become lead - poisoned . </P>

When was lead based paint banned in california