Heather L. Beatty, P.G. · Cary L Betz P GCary L. Betz, P.G. Water Supply Division Heather L. Beatty, P.G. Field Operations DivisionField Operations Division Texas Commission on Environmental

Edwards Aquifer ProtectionEdwards Aquifer ProtectionCary L Betz P GCary L. Betz, P.G.

Water Supply DivisionHeather L. Beatty, P.G.Field Operations DivisionField Operations Division

Texas Commission on Environmental Quality

Sole Source Aquifer Designation

Brief History of Edwards Aquifer l iRegulation

• Water Quality Board regulation in 1970. Targeted sewage lines and storage tanks. Applications g g pprequired in 1974.

• Prior approval for double wall USTs in 1977Prior approval for double wall USTs in 1977• Counties of Williamson 1985 & Travis in 1990• Significant rule changes in 1996 and 1999• Significant rule changes in 1996 and 1999

Edwards Aquifer RulesEdwards Aquifer RulesTitle 30 Tex. Admin. Code Chapter 213

• Subchapter A - Recharge & Transition Zones

• Subchapter B - Contributing Zone

Maps of Regulated AreasMaps of Regulated Areas• View or print from map viewerp p• Purchase paper maps• Download GIS boundariesDownload GIS boundaries

Index Map of Regulated Zonesp g

Regulated ActivitiesRegulated ActivitiesRecharge Zone

• Construction-related or post-construction prelated activity

• Site clearing with soil disturbanceSite clearing with soil disturbance• Examples: new buildings, roads, utility

lines and storage tank facilitieslines, and storage tank facilities

Regulated ActivitiesRegulated ActivitiesContributing Zone

• Activities disturbing greater than 5 acres• Activities disturbing greater than 5 acres• Activities disturbing less than 5 acres, but

part of larger plan or salepart of larger plan or sale

Required PlansRequired Plans• Water Pollution Abatement PlanWater Pollution Abatement Plan• Contributing Zone Plan

Plan ContentsPlan Contents

• Site plan• Site plan• Geologic assessment (not for CZ)

T h i l• Technical report• Application fee

Water Pollution Abatement PlanWater Pollution Abatement Plan• For all regulated activities a technical report mustFor all regulated activities, a technical report must

accompany the application for a water pollution abatement plan approval.p pp

• Plan must describe all temporary Best Management PracticesManagement Practices

• Plan must describe all permanent Best Management PracticesManagement Practices

Contributing Zone PlanContributing Zone Plan• For all regulated activities a technical report mustFor all regulated activities, a technical report must

accompany the application for contributing zone plan approvalp pp

• Some elements of the the storm water pollution prevention plan (SWPPP) developed under theprevention plan (SWPPP) developed under the Texas Pollutant Discharge Elimination System (TPDES) general permits for storm water ( ) g pdischarges may be submitted to fulfill some requirements of the plan.

Best Management PracticeBest Management PracticeTCEQ Definition

Schedule of activities, prohibitions of practices maintenance procedures andpractices, maintenance procedures, and other management practices to prevent or reduce the pollution of water in the Statereduce the pollution of water in the State

Temporary BMPsTemporary BMPsPrevent Pollution of Storm Water Runoff

Examples:

During Construction

Examples:Silt fence, erosion control blankets, stabilized construction exit sedimentstabilized construction exit, sediment basins, diversion berms, inlet protection

Perimeter Silt FencePerimeter Silt Fence

Water-Filled Sediment BasinsWater Filled Sediment Basins

Hydraulic Mulch ApplicationHydraulic Mulch Application

Temporary IrrigationTemporary Irrigation

Permanent BMPsPermanent BMPsPrevent Pollution of Storm Water Runoff

after Construction is Complete

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Examples:grassy swales, vegetated filter strips, wet b i d filt b ibasin, sand filter basins, retention/irrigation, bioretention, extended detention wet vaultsextended detention, wet vaults

Design Standard for Permanent BMPs

• Remove 80% of Total Suspended Solids• TSS loading and sizing calculated• Designed and certified by engineerg y g

Recent BMP ApprovalsRecent BMP Approvals

Residential Sand Filter Basin

Multi-family Sand Filter BasinMulti family Sand Filter Basin

Commercial Wet BasinCommercial Wet Basin

Multi-family Wet BasinMulti family Wet Basin

Bioretention SystemBioretention System

Management of Sensitive FeaturesManagement of Sensitive FeaturesIdentified Prior, During & After Construction

• Examples of sensitive features and buffersp• Example cavern mapping technique

Karst Feature in Road CutKarst Feature in Road Cut

Solution CavitySolution Cavity

Solution Enlarged FractureSolution Enlarged Fracture

Cave OpeningCave Opening

Cave BufferCave Buffer

Planning for Sensitive FeaturesPlanning for Sensitive Features

Cave DrawingCave Drawing

Guidance DocumentGuidance DocumentThe Texas Commission on Environmental QualityThe Texas Commission on Environmental Quality

has developed publication number RG – 348, Complying with the Edwards Aquifer Rules p y g q fTechnical Guidance on Best Management Practices.

Contact UsContact Us

A ti R i l Offi (512) 339 2929• Austin Regional Office, (512) 339-2929• San Antonio Regional Office, (210) 490-3096

Learn more about the Edwards Aquifer P t ti P tProtection Program at

www tceq state tx us/goto/eappwww.tceq.state.tx.us/goto/eapp