Small-Scale Onsite Wastewater Disposal

Questa provides services to individual homeowners, developers, and other clients throughout California in site evaluation, design, and environmental review of onsite wastewater disposal systems, including:

• Design of conventional single-residence septic systems, as well as mound and pressure-dosed systems

• Geological site investigations, including percolation testing and soil profile analyses

• Feasibility and planning analysis of onsite wastewater disposal suitability

• Assistance with permitting and regulatory compliance

• Construction management, ongoing monitoring, and maintenance

• Cumulative impact studies for contamination hazards and groundwater mounding

• Training seminars on soils, site evaluation, and specialized aspects of onsite sewage disposal practices

Large-Scale Wastewater Treatment and Disposal

• Design of community and commercial facility systems

• Geological site investigations, including percolation testing and soil profile analyses

• Onsite alternatives

• Mound disposal systems

• Spray irrigation

• Evaporation-percolation ponds

• Wetland and biological treatment systems

• Construction management, ongoing monitoring, and maintenance

Water Supply

• Water availability investigations

• Planning for municipal, industrial, and agricultural uses

• Evaluation of recreation and in-stream requirements

• Storage reservoirs and distribution systems

For more information or to set up a consultation, please contact Norm Hantzsche at
(510) 236-6114, ext. 214.