:: Water Quality Management Plans (WQMPs) & Plan Checks

Construction ProjectNew Development and Significant Redevelopment projects, as defined in the table below, shall be required to submit a project-specific WQMP prior to the first discretionary project approval or permit. The WQMP is intended to provide guidelines for project-specific post-construction Best Management Practices (BMPs) and for regional and sub-regional Source Control BMPs and Structural BMPs to address management of Urban Runoff quantity and quality to protect Receiving Waters.

If any question is answered "Yes," your project requires a Project-Specific WQMP. If all questions are answered "No," your project does NOT require a Project-Specific WQMP.
Does your proposed project include: Yes No
1. All Significant Redevelopment projects; defined as the addition or creation of 5,000 or more square feet of impervious surface on an existing development site. This includes, but is not limited to:
  • construction of additional buildings and/or structures,
  • extension of the existing footprint of a building,
  • construction of impervious or compacted soil parking lots.
  • Where Significant Redevelopment results in an increase of less than fifty percent of the existing impervious surfaces of an existing developed site, and the existing developed site received its discretionary land use approvals prior to the adoption of the WQMP (12/31/2004 in Santa Ana Region; 7/13/05 in Santa Margarita Region), the WQMP would apply only to the addition, and not the existing development.
Significant Redevelopment does not include routine maintenance activities that are conducted to maintain original line and grade, hydraulic capacity, the original purpose of the constructed facility or emergency actions required to protect public health and safety.
   
2. Residential development of 10 units or more, including Single Family and Multi-Family Dwelling Units, Condominiums, or Apartments.    
3. Industrial and commercial development where the land area represented by the proposed map or permit is 100,000 square feet, or more, including, but not limited to, non-residential developments such as hospitals, educational institutions, recreational facilities, mini-malls, hotels, office buildings, warehouses, light industrial, and heavy industrial facilities.    
4. Automotive repair shops (with standard industrial classification ("SIC") codes 5013, 7532, 7533, 7534, 7537, 7538, and 7539).    
5. Restaurants (SIC Code 5812) where the project site is 5,000 square feet, or more.    
6. Hillside developments that creates 10,000 square feet or more of impervious area including developments in areas with known erosive soil conditions or where natural slope is 25 % or more.    
7. Parking lots of 5,000 square feet or more of impervious surface exposed to storm water. Parking lot is defined as a site or facility for the temporary storage of motor vehicles.    
8. Developments creating 2,500 square feet, or more, of impervious surface that is adjacent to (within 200 feet) or discharging directly into areas designated in the Basin Plan as waters supporting habitats necessary for the survival and successful maintenance of plant or animal species designated under state or federal law as rare, threatened, or endangered species (defined in the Basin Plan as "RARE") or waterbodies listed on the CWA Section 303(d) list of Impaired Waterbodies within the Permit Area.    

Submitting a WQMP

  1. Preliminary WQMP - Two (2) copies are submitted to the Planning Division of the Community Development Department in association with a pending Planning case.
  2. Final WQMP - One (1) copy is submitted to the Public Works Department as a component of a pending Grading plan check.

Plan Check Process

Estimated turnaround times for the various plan check activities are as follows:

Plan Check Type First Check Duration Second Check (or more)
Preliminary WQMP with Planning Case 20 days 10 days
Final WQMP with Grading Plan 20 days 10 days

For the purposes of the City of Riverside, a Preliminary WQMP will contain all the required elements of a Final WQMP with the notable exceptions of the Approved Conditions and the Recorded Covenant. Educational Materials may be included or may be deferred until the Final WQMP, however all pertinent hydrology studies and calculations and all treatment control BMP sizing and design calculations are expected to be included in the approved Preliminary WQMP.

For projects that required a Preliminary WQMP as a condition of the entitlement, the Final WQMP must now be completed and recorded prior to issuance of the grading permit. Additional resources to aid in the preparation of WQMP's are located in the navigation bar on the right side of this page.

When a WQMP plan check is completed, the engineer of record is notified to pick up the report from either Planning in the case of a Preliminary WQMP or from Public Works along with the Grading plans in the case of the Final WQMP.

Approval of the Preliminary WQMP is required prior to any action by the Planning Commission or Zoning Administrator. Approval of the Final WQMP and recordation of the appropriate covenant is required prior to the issuance of any grading or building permit.

For a broad description of the NPDES permit requirements and links to Riverside County Flood Control and Water Conservation District resources, please follow this link to the Stormwater and Urban Runoff webpage under the Sewer Division of Public Works.

For more information or additional questions that you might have on your project specific WQMP, you may reach a Land Development representative at (951) 826-5341.

 
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