An ordinance banning polystyrene in San Luis Obispo passed unanimously at Tuesday night's City Council meeting.
A key provision of the ban was modified just before the vote at the request of council. Most members of the City Council expressed some concern that a one year hardship exemption could be renewed.
It allows businesses to opt-out if their costs to replace polystyrene containers exceeds 15 percent. Mayor Jan Marx said the 15 percent hardship should not be renewed for another year.