Commercial and Large-Scale Onsite Wastewater Engineering
Commercial, institutional and multi-lot projects are not large houses. Design flows are higher and are established from how the building is actually used, the approval route can be longer, and the documentation a health authority expects is heavier. This page is for owners, operators, boards and project teams planning that kind of work.
Project types we are equipped to design for
- RV parks and campgrounds
- Community halls and assembly buildings
- Commercial properties
- Institutional facilities
- Subdivisions and multi-lot developments
- Golf courses and recreational facilities
- Backcountry and ski lodges
- High-flow and complex-site systems
What makes these projects different
Design flow determination under the BC Sewerage System Standard Practice Manual
Design flow is the number everything else follows from. On a commercial system it is established from occupancy and use rather than assumed from bedroom count, and getting it wrong is expensive in both directions.
Systems that may exceed the standard streamlined pathway
Above a certain scale a project leaves the streamlined route and takes a longer approval path. Establishing which applies at the outset is what makes a realistic schedule possible.
Staged design and approval
The work can be split so a preliminary phase is delivered and reviewed before full design is commissioned. That lets a project commit to a first stage before funding is confirmed.
Owner declarations and occupancy data as design inputs
Because design flow depends on real use, occupancy figures and an owner declaration form part of the design record rather than sitting alongside it.
Health authority filing and coordination
Filing, correspondence and follow-up with the health authority are carried out as part of the work, not handed back to the owner.
How a project starts
What to have ready
- Site details: location, lot size, and any survey or site plan you hold
- Occupancy and usage patterns: how many people, how often, and when the peaks fall
- Existing system information: age, type, and any records or maintenance history
- Any regulatory order or deadline you are working to
What happens next
- We'll review all submitted documents, identify any gaps, and propose an initial scope of work. For an existing system, this may require pulling the property's wastewater filing with the district.
- Site assessment comes first; this involves identifying all details and the condition of the existing system (if applicable), proposed system location soil evaluation, property review to understand design constraints (property lines, water wells, water courses, etc.).
- We plan the design, manage the health authority filing, ensure the system meets the district standards and plan for the construction phase.
Discuss your project
Send the details you have and we will tell you what the approval route looks like before any commitment.