To obtain developmental approval, our consultants can assist in preparing and submitting a Certificate of Subdivision Approval (COSA) application to the local Environmental Health Department and the Montana Department of Environmental Quality.  Key components include a site evaluation, wastewater collection and treatment system design and permitting, non-degradation and phosphorus breakthrough analysis; surface water impact assessment; water supply assessment, stormwater/drainage assessment, and solid waste management.  Surface water in proximity to proposed drainfields has become a rather complex issue for obtaining COSA approval.  Site-specific information is required to determine the specifics for surface water setback requirements.