heather l. beatty, p.g. · cary l betz p gcary l. betz, p.g. water supply division heather l....
TRANSCRIPT
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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
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Sole Source Aquifer Designation
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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
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Edwards Aquifer RulesEdwards Aquifer RulesTitle 30 Tex. Admin. Code Chapter 213
• Subchapter A - Recharge & Transition Zones
• Subchapter B - Contributing Zone
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Maps of Regulated AreasMaps of Regulated Areas• View or print from map viewerp p• Purchase paper maps• Download GIS boundariesDownload GIS boundaries
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Index Map of Regulated Zonesp g
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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
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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
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Required PlansRequired Plans• Water Pollution Abatement PlanWater Pollution Abatement Plan• Contributing Zone Plan
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Plan ContentsPlan Contents
• Site plan• Site plan• Geologic assessment (not for CZ)
T h i l• Technical report• Application fee
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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
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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.
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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
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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
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Perimeter Silt FencePerimeter Silt Fence
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Water-Filled Sediment BasinsWater Filled Sediment Basins
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Hydraulic Mulch ApplicationHydraulic Mulch Application
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Temporary IrrigationTemporary Irrigation
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Permanent BMPsPermanent BMPsPrevent Pollution of Storm Water Runoff
after Construction is Complete
E l
p
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
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Design Standard for Permanent BMPs
• Remove 80% of Total Suspended Solids• TSS loading and sizing calculated• Designed and certified by engineerg y g
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Recent BMP ApprovalsRecent BMP Approvals
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Residential Sand Filter Basin
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Multi-family Sand Filter BasinMulti family Sand Filter Basin
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Commercial Wet BasinCommercial Wet Basin
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Multi-family Wet BasinMulti family Wet Basin
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Bioretention SystemBioretention System
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Management of Sensitive FeaturesManagement of Sensitive FeaturesIdentified Prior, During & After Construction
• Examples of sensitive features and buffersp• Example cavern mapping technique
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Karst Feature in Road CutKarst Feature in Road Cut
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Solution CavitySolution Cavity
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Solution Enlarged FractureSolution Enlarged Fracture
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Cave OpeningCave Opening
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Cave BufferCave Buffer
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Planning for Sensitive FeaturesPlanning for Sensitive Features
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Cave DrawingCave Drawing
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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.
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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