Whenever a user has violated a pretreatment standard or requirement or continues to violate the provisions of this chapter, wastewater discharge permit or orders issued hereunder, or any other pretreatment requirement, the city may petition the Superior Court of the State of California through the city attorney for the issuance of a temporary or permanent injunction, as appropriate, which restrains or compels the specific performance of the wastewater discharge permit, order, or other requirement imposed by this chapter on activities of the industrial user. Such other action as appropriate for legal and/or equitable relief may also be sought by the city. A petition for injunctive relief need not be filed as a prerequisite to taking any other action against a user. (Ord. 576, 2008).