Maine environmental regulators are beginning discussions on a rule that would phase out the use of the toxic chemical bisphenol-A in baby and toddler food packaging. The Board of Environmental Protection will meet Thursday in Augusta to take up the rulemaking proposal. Thursday’s meeting could offer an indication of how board members are inclined to rule. Last June, petitions from Maine voters were submitted. They call on the BEP to use its authority under Maine’s Kid-Safe Products Act to replace BPA in baby and toddler food packaging with safer alternatives that are readily available and affordable.