Texas Commission on Environmental Quality

Complying with the Edwards Aquifer Rules — Technical Guidance on Best Management Practices

StateTexashighNo

Fields not found in document: design_criteria.required_hydrologic_hydraulic_software

Other manuals in Texas: City of Austin, City of Houston

Document Metadata

Jurisdiction level

state

“The Edwards Aquifer rules are an effective mechanism we can use to protect this valuable resource. Found in Title 30 Texas Administrative Code Chapter 213”
Preface

State

Texas

“Texas Commission on Environmental Quality”
Title Page

Version / edition

RG-348, Revised July 2005 (errata March 28, 2009; addendum January 20, 2017)

“RG-348 Revised July 2005 Includes Errata Sheet (March 28, 2009) and Addendum Sheet (Jan. 20, 2017).”
Title Page

Adoption / effective date

2005-07-01

“Revised July 2005”
Title Page

Last revised date

2017-01-20

“Addendum Sheet (Jan. 20, 2017).”
Title Page

Relationship to state manual

independent

“The Edwards Aquifer Rules (30 TAC Chapter 213) regulate activities having the potential for polluting the Edwards Aquifer”
Chapter 3.1

Design Criteria

Design storm return periods (years)

100-year

“Structural BMPs located in the floodplain should be constructed with the wall elevation of any basins or ponds higher than the elevation of the 100 year flood at that location.”
Chapter 3.1

Water quality volume method

Permanent BMPs must remove at least 80% of the increase in TSS load from development; capture volume is sized from annual pollutant load (L = A × P × Rv × C × 0.226) and BMP-specific TSS removal efficiency.

“The selected BMP or combination of BMPs must reduce the increase in total suspended solids (TSS) load associated with development by at least 80%.”
Chapter 3.1

Peak flow calculation method(s)

Rational Method

“The runoff rate from the tributary area is calculated using the rational method as shown in Equation 3.4.”
Section 3.3.2

Required hydrologic/hydraulic software

Not found in document

No evidence cited

Approved BMP categories

Retention/Irrigation, Extended Detention Basin, Grassy Swales, Vegetative Filter Strips, Sand Filter Systems, AquaLogic Cartridge Filter System, Wet Basins, Constructed Wetlands, Bioretention, Permeable Concrete, Wet Vaults, Silt Fence, Sediment Basins, Vegetative Buffers, Inlet Protection

“Retention/Irrigation 100 ... Extended Detention Basin 75 ... Grassy Swales 70 ... Vegetative Filter Strips 85 ... Sand Filter Systems 89 ... Bioretention 89 ... Wet Basins 93 ... Constructed Wetlands 93 ... Permeable Concrete 89-100”
Table 3-1