The county Board of Supervisors, acting as the county Air Pollution Control District board, has scheduled a public hearing at 11 a.m. Tuesday on proposed revisions to the state implementation plan for PM-10 pollution.
The PM-10 plan is the county's control plan for airborne particle matter such as dust, dirt and soot.
PM-10 particles are small enough to be inhaled into the lungs, according to the U.S. Environmental Protection Agency.
The air pollution board must submit the control plan because Imperial County is in moderate violation of air pollution standards.
At the supervisors meeting Tuesday, the board may ask the state for law enforcement assistance at the Imperial Sand Dunes. A resolution by Supervisor Wally Leimgruber states "the enforcement of laws at the Imperial Sand Dunes has become inadequate considering the number of visitors."
The U.S. Bureau of Land Management oversees the dunes. Larry Caffey, acting BLM field manager, said violence at the dunes is increasing every year.