SPRINGFIELD – Certain chemicals that are commonly used as sealants on asphalt driveways, parking lots and playgrounds could soon come under state regulation over concerns about their impact on human health and the environment. A state Senate committee advanced a bill Thursday that would require public entities, including schools and state agencies, to publicly disclose their use of coal tar-based sealants or any other sealants with high concentrations of a substance called “polycyclic aromatic hydrocarbon,” or PAH, a compound that federal officials say poses risk to both human health and the environment. “According to the American Medical Association, it increases your chances of developing certain kinds of cancers by 38 times,” said Sen.