Malibu Municipal Code § 17.5 Development-Specific Design

17.5.1 Commercial Development.¶

Commercial development shall be designed to control the runoff of pollutants from structures, parking and loading areas. The following measures shall be implemented to minimize the impacts of commercial development on water quality.

A. Properly Design Loading/Unloading Dock Areas. Loading/unloading dock areas have the potential for material spills to be quickly transported to the storm water conveyance system. To minimize this potential, the following design criteria are required:

•	Cover loading dock areas or design drainage to minimize run-on and runoff of storm water.
•	Direct connections to storm drains from depressed loading docks (truck wells) are prohibited.

B. Properly Design Repair/Maintenance Bays. Oil and grease, solvents, car battery acid, coolant, and gasoline from repair and maintenance bays can negatively impact storm water if allowed to come into contact with storm water runoff. Therefore, design plans for repair bays must include the following:

•	Repair/maintenance bays must be indoors or designed in such a way that doesn't allow storm water runoff or contact with storm water runoff.
•	Design a repair/maintenance bay drainage system to capture all washwater, leaks, and spills. Connect drains to a sump for collection and disposal. Direct connection of the repair/maintenance bays to the storm drain system is prohibited. Obtain an Industrial Waste Discharge Permit if required.

C. Properly Design Vehicle/Equipment Wash Areas. The activity of vehicle/equipment washing/steam cleaning has the potential to contribute metals, oil and grease, solvents, phosphates, and suspended solids to the storm water conveyance system. Include in the project plans an area for washing/steam cleaning of vehicles and equipment. This area must be:

•	Self-contained and/or covered, equipped with a clarifier, or other pretreatment facility, and properly connected to a sanitary sewer.

D. Properly Design Parking Areas. Parking lots contain pollutants such as heavy metals, oil and grease, and polycyclic aromatic hydrocarbons that are deposited on parking lot surfaces by motor vehicles. These pollutants are directly transported to surface waters. To minimize the offsite transport of pollutants, the following design criteria are required:

•	Reduce impervious surface land coverage of parking areas.
•	Infiltrate runoff before it reaches storm drain system.
•	Treat runoff before it reaches storm drain system.

Parking lots may also accumulate oil, grease, and water insoluble hydrocarbons from vehicle drippings and engine system leaks. To minimize impacts to water quality, the following measures are required:

•	Treat to remove oil and petroleum hydrocarbons at parking lots that are heavily used (e.g. fast food outlets, lots with 25 or more parking spaces, sports event parking lots, shopping malls, grocery stores, discount warehouse stores).
•	Ensure adequate operation and maintenance of treatment systems particularly sludge and oil removal, and system fouling and plugging prevention control.

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17.5.2 Restaurants.¶

Restaurants shall be designed to minimize runoff of oil and grease, solvents, phosphates, and suspended solids to the storm drain system. The following measures shall be implemented to minimize the impacts of restaurants on water quality.

A. Properly Design Equipment/Accessory Wash Areas. The activity of outdoor equipment/accessory washing/steam cleaning has the potential to contribute metals, oil and grease, solvents, phosphates, and suspended solids to the storm water conveyance system. Include in the project plans an area for the washing/steam cleaning of equipment and accessories. This area must be:

•	Self contained, equipped with a grease trap, and properly connected to a sanitary sewer.
•	If the wash area is to be located outdoors, it must be covered, paved, have secondary containment and be connected to the sanitary sewer.

Exceptions & meaning →

17.5.3 Gasoline Stations, Car Washes and Automotive Repair Facilities.¶

Gasoline stations, car washes and automotive repair facilities shall be designed to minimize runoff of oil and grease, solvents, car battery acid, coolant and gasoline to stormwater system. The following measures shall be implemented to minimize the impacts of gasoline stations, car washes and automotive repair facilities on water quality.

A. Properly Design Fueling Areas. Fueling areas have the potential to contribute oil and grease, solvents, car battery acid, coolant, and gasoline to the storm water conveyance system. Therefore, design plans for fueling areas must include the following:

•	The fuel dispensing area must be covered with an overhanging roof structure or canopy. The canopy's minimum dimensions must be equal to or greater than the area within the grade break. The canopy must not drain onto the fuel dispensing area, and the canopy downspouts must be routed to prevent drainage across the fueling area.
•	The fuel dispensing area must be paved with Portland cement concrete (or equivalent smooth impervious surface), and the use of asphalt concrete shall be prohibited.
•	The fuel dispensing area must have a 2% to 4% slope to prevent ponding, and must be separated from the rest of the site by a grade break that prevents run-on of storm water to the extent practicable.
•	At a minimum, the concrete fuel dispensing area must extend 6.5 feet (2.0 meters) from the corner of each fuel dispenser, or the length at which the hose and nozzle assembly may be operated plus 1 foot (0.3 meter), whichever is less.

B. Properly Design Repair/Maintenance Bays. Oils and grease, solvents, car battery acid, coolant, and gasoline from the repair/maintenance bays can negatively impact storm water if allowed to come into contact with storm water runoff. Therefore, design plans for repair bays must include the following:

•	Repair/maintenance bays must be indoors or designed in such a way that doesn't allow storm water run-on or contact with storm water runoff.
•	Design a repair/maintenance bay drainage system to capture all wash-water, leaks, and spills. Connect drains to a sump for collection and disposal. Direct connection of the repair/maintenance bays to the storm drain system is prohibited. Obtain an Industrial Waste Discharge Permit if required.

•	Self-contained and/or covered, equipped with a clarifier, or other pretreatment facility, and properly connected to a sanitary sewer or to a permit disposal facility.

D. Properly Design Loading/Unloading Dock Areas. Loading/unloading dock areas have the potential for material spills to be quickly transported to the storm water conveyance system. To minimize this potential, the following design criteria are required:

•	Cover loading dock areas or design drainage to minimize run-on and runoff of storm water.
•	Direct connections to storm drains from depressed loading docks (truck wells) are prohibited.

Exceptions & meaning →

17.5.4 Outdoor Material Storage Areas.¶

Outdoor material storage areas refer to storage areas or storage facilities used solely for the storage of materials. Improper storage of materials outdoors may provide an opportunity for toxic compounds, oil and grease, heavy metals, nutrients, suspended solids, and other pollutants to enter the storm water conveyance system. Outdoor material storage areas shall be designed to prevent stormwater contamination from stored materials. Where proposed project plans include outdoor areas for storage of materials that may contribute pollutants to the storm water conveyance system, the following measures are required:

•	Materials with the potential to contaminate storm water must be: (1) placed in an enclosure such as a cabinet, shed or similar structure that prevents contact with runoff or spillage to the storm water conveyance system; or (2) protected by secondary containment structures such as berms, dikes or curbs.
•	The storage areas must be paved and sufficiently impervious to contain leaks and spills.
•	The storage area must have a roof or awning to minimize collection of storm water within the secondary containment area.

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17.5.5 Trash Storage Areas.¶

A trash storage area refers to an area where a trash receptacle or receptacles are located for use as a repository for solid wastes. Loose trash and debris can be easily transported by the forces of water or wind into nearby storm drain inlets, channels, and/or creeks. Trash storage areas shall be designed to prevent stormwater contamination by loose trash and debris. All trash container areas must meet the following requirements (individual family residences are exempt from these requirements):

•	Trash container areas must have drainage from adjoining roofs and pavement diverted around the area(s).
•	Trash container areas must be screened or walled to prevent off-site transport of trash.

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17.5.6 Pools and Spas.¶

Chlorinated and brominated pool and spa drainage have the potential to negatively impact both aquatic and marine plant and animal species. To minimize impacts to water quality, and to ensure that any runoff or drainage from the pool or spa will not include excessive amounts of chemicals that may adversely affect water quality or environmentally sensitive habitat area, the following design criteria are required:

•	Alternative sanitization methods are required for all pools and spas. This may include no chlorine or low chlorine sanitization methods.
•	Prohibit discharge of chlorinated pool water.
•	Prohibit discharge of non-chlorinated pool water into a street, storm drain, creek, canyon, drainage channel, or other location where it could enter receiving waters.

Exceptions & meaning →