Services

Commercial & Development Wastewater Engineering

WillCo Engineering provides professional engineering services for decentralized wastewater systems serving commercial properties and small developments throughout Texas.  Engagements are structured based on project scope, regulatory requirements, and complexity.

Commercial OSSF Design

Full engineering design packages including:

  • Wastewater loading analysis (BOD/TSS evaluation)

  • Treatment system selection

  • Disposal field design (spray, drip, conventional, etc.)

  • Construction-ready plan sets

  • Permit documentation support

  • Regulatory coordination

Typical engagements begin at commercial scale and vary depending on project complexity.

RV Parks & High-Strength Systems

Engineering services for:

  • RV parks and resort properties

  • High occupancy facilities

  • Restaurants and food service establishments

  • Facilities with elevated wastewater strength

Services include pretreatment evaluation, phased system planning, and regulatory strategy.

Development Wastewater Planning

Pre-construction services include:

  • Feasibility evaluations

  • Wastewater capacity projections

  • Disposal strategy development

  • System phasing planning

  • Regulatory pathway identification

This service is often utilized prior to land acquisition or site development planning.

Lift Stations & Pump Systems

Engineering design of:

  • Wastewater lift stations

  • Dosing systems

  • Force mains

  • Pump specifications and controls

Integrated into decentralized or development-scale systems.

TPDES & TLAP Permitting (TCEQ Chapter 217)

Professional engineering services for state-regulated wastewater facilities requiring Texas Commission on Environmental Quality (TCEQ) authorization.  This is typically for flows over 5,000 GPD not covered by TCEQ 285 (OSSFs).

Services include:

  • TPDES discharge permit applications

  • TLAP (Texas Land Application Permit) preparation

  • Chapter 217 wastewater facility design coordination

  • Effluent limitations and loading analysis

  • Hydraulic and treatment process evaluation

  • Engineering reports and supporting documentation

  • Coordination with TCEQ review staff

Applicable to:

  • Small municipal systems

  • Private utility districts

  • RV parks requiring permitted discharge

  • Industrial wastewater facilities

  • Developments exceeding OSSF thresholds

This service extends beyond decentralized septic systems and supports projects requiring full regulatory permitting under Texas wastewater rules.