Persons storing chemicals or chemical waste outdoors shall be required to install spill containment subject to requirements established by the City Engineer and Federal, State and County Standards. Persons storing any other materials or equipment that are potential sources of storm water pollution are also required to install spill containment.
No person shall operate a spill containment system that could allow incompatible materials and/or wastes to mix, thereby creating hazardous or toxic substances in the event of failure of one or more containers. Spill containment systems shall consist of a system of dikes, walls, barriers, berms and/or other devices designed to contain the spillage of the liquid contents of the containers stored in them and to minimize the buildup of storm water from precipitation, and run-on from roof drainage and outside areas. If the spill containment system does not have a roof which covers the entire contained area, the spill containment system shall have the capacity to contain precipitation from at least a 24 hour, 25 year rainfall event plus ten (10) percent of the total volume of the material stored there or the volume of the largest container, whichever is greater. Spill containment systems shall also be constructed of impermeable and non-reactive materials to the materials and/or wastes being contained. Spilled and/or leaked materials and/or wastes and any accumulated precipitation shall be removed from the spill containment system in as timely a manner as is necessary to prevent the overflow of the spill containment system.
Unless otherwise approved by the City Engineer, all chemicals or wastes discharged within the spill containment system shall be disposed of in accordance with all applicable Federal, State, and local rules, regulations, and laws, and shall not be discharged into the City's sanitary sewer system, storm water drainage system or onto the ground.