The Municipal Regional Stormwater NPDES (National Pollutant Discharge Elimination System) Permit (MRP) requires San Francisco Bay Area Municipalities to regulate stormwater treatment for developments (among other items). The MRP has specific requirements for Low Impact Development (LID) treatment measures for all developments that trigger the LID requirement. LID treatment measures are limited to:
Rain water harvesting and use
Evapotranspiration (self treating areas)
Biotreatment measures are only allowed when feasibility analysis shows that infiltration and rainwater harvest and use are unfeasible.
Stormwater treatment requirements are dependent on:
Project land use
The amount of new or replaced impervious surface area
Amount of new / replaced impervious surface area relative to existing impervious area
The City has a variety of feasibility worksheets that are required to be submitted to screen the development applications for the type of LID treatment feasible. The applicant is responsible for submitting all the necessary worksheets with their initial development application. Applicants are required to start with and submit the C.3 Data Form.
After the data form is complete, applicants are required to complete and submit the LID Screening Worksheet. This worksheet walks the applicant through the feasibility of using infiltration or harvesting and use. If either of those methods are initially feasible, then the applicant is required to submit one of the following:
After sizing the treatment controls, apply the Special Projects Reduction Credit from the Special Projects Worksheet, if applicable, to determine the final sizing required for the project.
Other resources for the worksheets include:
Some projects may be able to take advantage of credits for lower implementation of LID requirements. These projects are classified as special projects. Typically these projects are pedestrian oriented urban design projects. The credits are dependent on the location of the project, amount of new / replaced impervious area and density / FAR. To determine if a project qualifies as a special project complete and submit the Special Projects Worksheet.
The City has designated specific areas as commercial / business / priority districts. For the Special Projects Worksheet, to determine a project's location relative to the City's designated areas, refer to the following maps:
Downtown Campbell is designated and zoned as a central business district. The specific boundary can be seen on the Downtown Map.
Winchester Boulevard is interpreted to be a special district with the formulation of the Winchester Boulevard Master Plan and can be categorized as a pedestrian-oriented commercial district. The specific boundary can be seen on the Winchester Map.
Pruneyard / Creekside Commercial District is designated as a special project area in the City’s General Plan (LUT 30-35) and can be categorized as a pedestrian-oriented commercial district. The district boundary can be seen on the Pruneyard / Creekside Map.
Priority Development Area (PDA) is designated as the Redevelopment Project Area and can be seen on the city’s zoning map or the PDA Area Map.
The city has three Transit Oriented Development (TOD) areas that are near transit hubs. The transit hubs include: