Wastewater Services

Skillings offers a full range of sewer, wastewater and septic system services from planning and design, through construction and project startup. Our staff has extensive experience in the design of gravity and STEP (Septic Tank Effluent Pump) collection systems, pump station and force mains, I&I studies, as well as trenchless technology for sewer line repair. Our staff has intimate knowledge of the rules and regulations, having co-authored portions of the Washington State Department of Ecology’s Criteria for Sewage Works Design, the “Orange Book.”

Skillings is one of the few engineering firms in Washington State with a septic designer on staff. This provides direct access for our clients to a skilled septic designer for projects ranging from residential septic systems to large on-site septic systems.

Examples of the diverse types of wastewater services include the following:

– General Sewer Plans
– Comprehensive Sewer Plans
– Feasibility Studies
– Gravity Collection Systems
– STEP Collection Systems
– Sewer Lift/Pump Stations
– Sewer Force Mains
– Septic Systems
– Large Onsite Septic Systems (LOSS)
– Sewer Treatment Facilities
– Reclaimed Water Treatment Facilities
– Reclaimed Water Comprehensive Plans
– Reclaimed Water Storage Facilities
– Reclaimed Water Groundwater Recharge
– Groundwater Mounding Analysis