City of West Hollywood Urban Runoff Management Program
working for a cle aner bay
Design Regulations, Construction Practices and Good Housekeeping Requirements for new building projects and existing properties to reduce urban runoff water pollution Planning for a Cleaner Bay
Design Regulations, Construction Practices and Good Housekeeping Requirements for new building projects and existing properties to reduce urban runoff water pollution
Urban runoff flowing through storm drains is the greatest single source of pollution to the beaches and nearshore waters of the Santa Monica Bay. Unlike sewage and discharges from industrial sources, urban runoff cannot always be adequately treated before it reaches the Bay and our beaches. By reducing the quantity The City of West Hollywood has of runoff and passed an Ordinance that is improving the designed to reduce the amount quality of runoff, of urban runoff pollution that we lower levels of harmful reaches our storm drain system bacteria, toxics, and other forms and the Santa Monica Bay. The of pollutants affecting the Bay. Ordinance requires a 0.75” Reducing the amount of reduction in rainfall leaving all urban runoff and the impermeable surfaces of all newly amount of pollut- developed parcels or treatment of ants contained in 0.2” of rainfall per hour with- the runoff are in the City. The Ordinance also essential for the specifies guidelines for existing health and safety of properties to reduce the level of our community. Runoff contaminants that are carried by from West Hollywood goes directly urban runoff into the Bay. into Ballona Creek and the Santa Monica Bay.
Let’s Keep Our WATER Clean! Table of Contents
Page Description 2 Best Management Practices Reducing Urban Runoff Pollution for a Cleaner Bay New Development and Design 3 Design Requirements to Reduce Urban Runoff Requirements for New Development Design Principles to Reduce Urban Runoff Penalties for Non-Compliance 4 Gutters/Downspouts Design Criteria Other Design Criteria 5 Urban Runoff Mitigation Plan: Submission and Approval Design Solutions 6 Multi-Family Residential Development and Commercial Development Design Ideas 7 Parking Lot Design Ideas Parking Lots Ongoing Maintenance 8 Restaurants and Outdoor Dining Areas All Restaurants Maintenance 9 Projects Under Construction: Requirements to Reduce Urban Runoff
Best Management Practices (BMPs) Contents of Table Penalties for Non-Compliance
This booklet is a publication of the City of West Hollywood Environmental Services. Special thanks to the City of Santa Monica Environmental Programs Division. Design by Cowan Communication Arts www.cowcom.com Best Management Practices
Reducing Urban Runoff Pollution for a Cleaner Bay
Hazardous and toxic substances like automo- tive fluids and pesticides, debris and trash from residential and commercial construction, pet wastes, paint products and much more are washed into our storm drain system and into BMPs the Santa Monica Bay on a daily basis. This liquid waste, called urban runoff, is the Keep single largest source of water pollution into the Bay, and it is a major threat to the POLLUTION health and safety of our residents and from businesses, and to the marine ecosystem. flowing Construction waste is one of the greatest into sources of pollution into the Bay. Sediment, concrete pours and paint/other
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all contribute to a cleaner Bay and a healthier way of life.
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2 Design Requirements to Reduce Urban Runoff
Requirements for New Design Principles to Development Reduce Urban Runoff When submitting an application for a Maximize Permeable Areas new development project for priority (Ordinance Section 19.20.190) projects, you may be required to submit One of the most effective ways to a Standard Urban Storm Water Mitigation reduce urban runoff is to increase the Plan (SUSMP) to the City of West percentage of permeable surfaces and Hollywood’s Environmental Services. landscaped areas in your project design: The Standard Urban Storm Water (1) porous materials will increase the Mitigation Plan you develop will ensure amount of runoff that seeps into the that the projected urban runoff from ground, rather than being carried into your proposed project is reduced by at storm drains, (2) natural drainage, and least a volume equivalent to the surface (3) swales, berms, green strip filters, area of all impermeable surfaces times gravel beds and french drains. 0.75” or treatment of 0.2” of rainfall per hour. Reduce Parking Lot Pollution Options to meet this requirement By incorporating specific design include curbless green strip filters elements and principles, your plan and porous pavement to capture and will meet requirements outlined in the percolate runoff where possible. Stormwater and Urban Runoff Pollution Control Ordinance (15.56.095).
Contact Environmental Services at Penalties for 323-848-6499 or refer to 15.56.095 in Design and Development New the Municipal Code to determine if you Non-Compliance have a priority project. (Ordinance Section 15.56.100) Failure to implement an approved Standard Urban Storm Water Mitigation Plan and comply with all provisions of this ordinance shall constitute a misdemeanor punishable as set forth in subsection (a) of Section 1.08.010 of this code. Each day that a violation continues shall constitute a separate offense.
3
4 New Development and Design
(v) Trash areas. Trash (v)
(iv) Fueling areas, areas, Fueling (iv)
(iii) Vehicle and equipment wash areas, wash equipment and Vehicle (iii)
(ii) Repair and maintenance bays, maintenance and Repair (ii)
(i) Loading and unloading dock areas, dock unloading and Loading (i)
from the following areas: following the from
keep precipitation and urban runoff runoff urban and precipitation keep
criteria deal with strategies to to strategies with deal criteria
family residences. These design design These residences. family
all new development except single single except development new all
this subsection shall be required for for required be shall subsection this
The design elements established in in established elements design The
Other Design Criteria Design Other
gravel beds. gravel
and then to filter inserts or or inserts filter to then and
will direct flow to paved areas areas paved to flow direct will
infiltration trenches. Downspouts Downspouts trenches. infiltration
Management Practices Handbook for for Handbook Practices Management
accordance with the California Best Best California the with accordance
Downspouts shall be constructed in in constructed be shall Downspouts
Design Criteria Design
Gutters/Downspouts Gutters/Downspouts
to Reduce Urban Runoff Urban Reduce to
Design Requirements Requirements Design
contact with water. with contact
or covered thereby protecting them from from them protecting thereby covered or
materials must be completely enclosed enclosed completely be must materials
storm water conveyance system, these these system, conveyance water storm
that may contribute pollutants to the the to pollutants contribute may that
materials, including trash areas, areas, trash including materials,
outdoor areas for the storage of of storage the for areas outdoor
Where new development will include include will development new Where
contaminated runoff!> contaminated
covered to avoid avoid to covered to design gutters gutters design to and downspouts!> and When you submit your application for Contact Environmental Services at a new development or redevelopment, (323) 848-6499 to see if your devel- you may also be required to submit a opment must meet this requirement. Standard Urban Storm Water Mitigation Plan (Section 15.56.095). This plan will Forms to complete the Standard detail how your proposed project will Urban Storm Water Mitigation Plan are comply with all applicable Ordinance available from Environmental Services. requirements including a 0.75” reduction Each plan that is submitted will be in total runoff from all impermeable evaluated according to particular areas on your site or treatment of 0.2” characteristics of the project and of rainfall per hour. This plan must of the site to be developed. No build- also describe how your proposed Best ing permit will be issued for a proj- Management Practices will be maintained ect covered under the Ordinance until annually to ensure their continued a mitigation plan has been approved effectiveness and will be transferred by the City. The final Certificate during property sale. of Occupancy will be issued only upon inspection and approval of the Plan’s completed BMPs by the City. Design Solutions The following photos provide examples of Additional information is available BMPs that can be incorporated into new for other design concepts, including development to meet City urban runoff drawings and references. mitigation requirements. Design and Development New New Image Placeholder All runoff up to 0.2” per hour must be treated. Downspouts directed to trench drain with Downspouts filtration or infiltration directed to permeable areas Permeable walkways Trench drain Unit pavers on sand Vegetated swale Crushed aggregate driveway Inlet grate Trench filter insert installed Filter Filter Insert Insert Trench Drain Filter insert Catch basin Downspouts directed to trench drain with Trench drain Parking Parking Lot Design Ideas Parking Lots Turf irrigation biofilter BMPS must be maintained annually. Filter insert in area drain Porous pavement Infiltration trench with rock filter Examples: 5,000 sq. ft. or over must install Best Management Practices (BMPs) to filter and contain pollutants. pad linings and other metals and toxics that can enter the Bay. Lots with 25 or more spaces or Parking lots create pollutants from oil and grease leaks, brake filtration or infiltration 8 Restaurants and Outdoor Dining Areas Restaurants and Outdoor Dining Areas Dining Outdoor and Restaurants cooking grease. cooking Must safely collect and dispose of of dispose and collect safely Must (626-458-3517). issued by Los Angeles County County Angeles Los by issued Must have an industrial waste permit permit waste industrial an have Must Water Mitigation Plan (SUSMP). Plan Mitigation Water Must Prepare Standard Urban Storm Storm Urban Standard Prepare Must All Restaurants All fitting lids on bins. on lids fitting Trash area must be clean with tight tight with clean be must area Trash sanitary sewer. sanitary Floor drains must be connected to the the to connected be must drains Floor sanitary sewer (sink or floor drain). floor or (sink sewer sanitary Mop water must be discharged to the the to discharged be must water Mop the street. the a waterbroom with no water reaching reaching water no with waterbroom a Municipal Code. Sweep the area or use use or area the Sweep Code. Municipal a hose is prohibited by the City’s City’s the by prohibited is hose a Hosing down outdoor dining areas with with areas dining outdoor down Hosing Maintenance close when that can that beaches beaches pollutants the cigarette butts cigarette are illegal discharges illegal are BAY. OILS Fats Fats reach GREASES to hosing off sidewalks sidewalks off hosing to an allowable alternative alternative allowable an and walkways!> and and Projects Under Construction 9 - - - - Penalties for Non-Compliance or hard surface cutting activities (i.e. sidewalks) that will result in particles entering the air or land ing on the ground, BMP steps shall be implemented to prevent or minimize such particle releases into the envi ronment. Washing of construction or other industrial vehicles will not be allowed adjacent to the construction site. Commercial vehicle wash facili ties must be used. No polluted run off from the washing of vehicles on a construction site shall be allowed to leave the site. For any cement-concrete mixing, paint removal and preparation, sandblasting constitute a violation of the city’s stormwater ordinance. Each day that a violation occurs will constitute a separate offense. Construction sites may also be subject to stoppage of work for violation of these requirements. Failure to implement Best Management Practices at construction sites shall - - sediment loading> protection to reduce Best Management Practices (BMPs) implemented until a Certificate of Occupancy has been issued. the time of demolition of an existing structure, or at the start of new construction. BMPs are to remain below are required by this Ordinance. BMPs must be put into practice at onsite. BMPs should insure that pollut ants do not get washed or dumped into the storm drain system. The BMPs listed Best Management Practices (BMPs). BMPs insure that pollutants do not come in contact with rain or runoff and stay All projects regardless of size under going construction in the City of West Hollywood must follow specific Requirements Requirements to Reduce Urban Runoff Projects Projects Under Construction: carried off-site cause pollution. divert runoff. Precipitation and wind- transported sediments, and other debris area, such as mounds of dirt or dumpsters, along with devices designed to intercept and safely A plastic covering shall be used to prevent erosion of any unprotected Any sediments or other materials that are tracked off the site must be cleaned and removed the same day. (Ordinance Section 15.56.060). Runoff, sediment, and construction waste from construction sites and parking areas must not leave the site working for a cleaner bay For more information contact 323-848-6499 email us at [email protected] or visit www.weho.org City of West Hollywood Environmental Services 8300 Santa Monica Blvd., West Hollywood, California 90069