ESA LeadCare(R) System Used to Identify Salvadoran Children with Lead Poisoning. NewsRx. May 9, 2008. El Salvador, like many emerging markets, must contend with lead toxicity from industrial sources as an issue of major public concern. This past fall, the El Salvadoran government threatened to shut down a large car-battery factory ("La Record"), which was known to be creating lead contamination in the surrounding community through improper waste-disposal practices.[ See ]