About Liberte Environmental Associates ( LEA, Inc. )
The Environmental Salient Quarterly discussion. Technical Workplace by Dave LaLiberte, P.E. at LEA, Inc.
LEA taking field Hydrolab measurements
Diffusers ready for river placement
Meet LEA Staff
LEA's Environmental Engineering Services
LEA Project Highlights
Engineering Services We Provide:
  • Wastewater NPDES Permit Writing, Review and Response. NPDES Permits Potentially Affecting Ambient Water Quality [Alternative site can be found at ee83.com]
  • Rivers and Marine Water Quality Field Study.
  • Industrial and Municipal Effluent Wastewater Characterization.
  • Pump and Pipeline Hydraulic Analysis.
  • Pipeline Effluent Quality Modeling.
  • Expert Witness, Analysis, Reporting & Testimony in Ambient Water Quality.
  • Title V Air Permits Potentially Affecting Ambient Water Quality. [Alternative site can be found at ee83.com]
  • TMDL - Total Maximum Daily Load Review, Analysis and Response.
    TMDLs Potentially Affecting Ambient Water Quality [Alternative site can be found at ee83.com]
  • Outfall Diffuser Design and Review.
  • Thermal Discharge Analysis.
  • TMP - Temperature Management Plans.
  • Environmental Permitting Requirements.
  • Wet Weather Municipal Discharge and Stormwater Evaluations.
  • Alternatives Costs & Benefits Analysis - Effluent Treatment Design Requirements.
  • Site Mixing Zone Mapping - Conductivity & Dye Study Investigation.
  • Watershed and Water Resources Planning.
    See Environmental Salient Quarterly for links to sites discussing fish contaminated with mercury posing worldwide threat, Hood Canal is called home by non-native sea squirts, EU deal to reduce carbon emissions, tidal-power generation in Puget Sound, new coal-fired power plants, sewage overflows, aging infrastructure, Exxon Valdez oil spill, plug-in hybrids, China's increasing pollution, greenhouse gases, ocean vertical currents, emissions trading, carbon taxes, environmental economics, Klamath dams, Everglades, ecology, risk-assessment, and other issues in the US and international forums.
    Technical Workplace discussion by Dave LaLiberte, P.E. at LEA, Inc. includes: seminal Puget Sound circulation and velocities documents; mixing zone diffuser port velocities; handy water science utilities; important mixing zone related regulatory documents; effluent limitations regulatory program documents including technical support documents and 40 CFR 400 to 471; and links for ordering from the EPA some key development documents for industry effluent limitations guidelines. The full development document for Seafood including Mechanical Bottom Fish is now compiled and available on this website.The full development document for Oil and Gas Extraction Coastal Subcategory is now compiled and available on this website.
You may contact us at

Liberte Environmental Associates, Inc.
P.O. Box 3678
Wilsonville, Oregon 97070-3678

Tel: 503 582-1558