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Decentralized Wastewater Workshop Greenville, South Carolina. July 30, 2009. Land Disposal of Treated Wastewater Treatment & Disposal Options Overview. Secondary Treatment Treatment Method Options. Tertiary Treatment Treatment Method Options.

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decentralized wastewater workshop greenville south carolina
Decentralized Wastewater Workshop

Greenville, South Carolina

July 30, 2009

individual lot conventional drain field system summary
Individual Lot Conventional Drain FieldSystem Summary
  • Std. Septic Tank & Stone Drain Tile Field
  • Drain field requires cleared land w/ < 10% slope.
  • 3,000 sq ft active drain field + 50% repair area
  • Approx. Unit Cost = $4,000 - $5,000 per lot.
individual lot drip irrigation system summary
Individual Lot Drip IrrigationSystem Summary
  • Std. Septic Tank + Secondary & Tertiary Treatment.
  • Subsurface drip field requires un-cleared land w/ < 33% slope.
  • 2,000 sq ft drip field + no repair area.
  • Approx. Unit Cost = $25,000 - $28,000 per lot.
  • Requires 110-volt power supply + telephone line.
  • Requires routine maintenance @ approx. $600/yr.
slide19
Individual Lot Repair SolutionCamden County, NCAdVantex Pre-Treatment & Sand Mound Disposal over Sand Line Trench
communal drain field system overview
Communal Drain FieldSystem Overview
  • 100-Lot Subdivision, Avg. 3-BR, in Upstate
  • Primary Treatment
  • 0.4 GPD/Sq Ft LTAR
  • Requires 6.9 acres of Active Drain Field plus additional 3.4 acres for 50% Repair Area
  • HOA Ownership (excluding Collection System)
  • Permitting by DHEC-Bureau of Environmental Health (up to 50,000 GPD +/-)
  • Approx. Unit Cost = $5,000 - $6,000 per lot
communal drip irrigation system overview
Communal Drip IrrigationSystem Overview
  • 100-Lot Subdivision, Avg. 3-BR, in Upstate
  • Primary & AdVantex Secondary Treatment
  • 0.2 GPD/Sq Ft LTAR
  • Requires 4.1 acres of Subsurface Drip Field & No Repair Area
  • Requires Routine O&M
  • Requires Utility Ownership
  • Permitting by DHEC-Bureau of Water
  • Approx. Unit Cost = $18,000 - $20,000 per lot
school surface drip irrigation system overview
School Surface-Drip IrrigationSystem Overview
  • New Ralph Chandler Middle School at Fork Shoals

- Orenco Recirculating Media Filter Treatment

- 6-Acre GeoFlow Surface-Drip Irrigation Disposal

- 0.1 – 0.2 GPD/Sq Ft LTAR

- 250,000 Gal (2 weeks) Treated Effluent Storage

- 15,900 GPD Design Flow

- 4 Groundwater Monitoring Wells

- $1.6 Million Construction Cost

- Contract Operator – All Seasons Environmental Laboratories

- Orenco Vendor Oversight Operations Contract - AQWA

wrap up what makes a decentralized system successful
Wrap-Up ….What Makes a DecentralizedSystem Successful?
  • Suitability of Site & Sustainable Loading Rate.
  • Proper Application of Treatment & Disposal Methods Selected.
  • Good Design.
  • Good Installation.
  • Good O&M.

Thanks for your attention ….

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