The Agency may issue a permit to any person, firm, partnership, association or corporation to deposit water or wastewater into any storm or sanitary drainage system of the city; provided, such water or wastewater does not contain crude, distilled or refined oil, mud or any residuary products of oil or other substances mentioned in Cal. Fish and Game Code § 5650; and, provided further, that permittee installs and properly maintains a clarification system approved by the Agency for the purpose of treating the water.
(`78 Code, § 14.24.030.)