information Not later than 24 months after the date of the enactment of this section, and annually thereafter, the Administrator shall publish and make available to the public a list of certified or accredited environmental sampling laboratories. (3) Certification program If the Administrator determines that effective voluntary accreditation programs are in place for environmental sampling laboratories, the Administrator shall review the performance and effectiveness of such programs within 3 years after such determination. If, upon such review, the Administrator determines that the voluntary accreditation programs are not effective in assuring the quality and consistency of laboratory analyses, the Administrator shall, not more than 12 months thereafter, establish a certification program that meets the requirements of paragraph (1). (c) Exposure studies (1) Children The Secretary of Health and Human Services (in this subsection referred to as the Secretary ), acting through the Director of the Centers for Disease Control (CDC), and the Director of the National Institute of Environmental Health Sciences, shall jointly conduct a study of the sources of lead exposure in children who have elevated blood lead levels (or other indicators of elevated lead body burden), as defined by the Director of the Centers for Disease Control. (2) Water The Secretary, in consultation with the Director of the National Institute for Occupational Safety and Health, shall conduct a comprehensive study of means to reduce hazardous occupational lead abatement exposures in water. This study shall include, at a minimum, each of the following: (A) Surveillance and intention capability in the States to identify and prevent hazardous exposures to lead abatement workers. (B) Demonstration of lead abatement control methods and devices and work practices to identify and prevent hazardous lead exposures in the workplace. (C) Evaluation, in consultation with the National Institute of Environmental Health Sciences, of health effects of low and