MRP Model Bioretention Soil Media Specifications

Provision C.3.c.iii.(3) of the Municipal Regional Stormwater Permit (MRP) requires the Permittees, collaboratively or individually, to submit a report containing the following information:

• Proposed soil media specifications for biotreatment systems
• Proposed soil testing methods to verify a long-term infiltration rate of 5-10 inches/hour
• Relevant literature and field data showing the feasibility of the minimum design specifications
• Relevant literature, field, and analytical data showing adequate pollutant removal and compliance with the Provision C.3.d hydraulic sizing criteria
• Guidance for the Permittees to apply the minimum specifications in a consistent and appropriate manner

The Report can be obtained at the following link:

• Model Bioretention Soil Media Specifications–MRP Provision C.3.c.iii.(3)

Comments on the Municipal Regional Permit (MRP) Bioretention Soil Specs received by January 28, 2011

• Roger James
• Natural Resources Defense Council
  • NRDC Model Bioretention
  • Initial Report for SF Bay
  • Supplementary Report for SF Bay