The purpose of the Wastewater Program is to collect and convey all wastewater produced within the Castro Valley Sanitary District (CVSan) to the Oro Loma/Castro Valley Wastewater Treatment Plant in San Lorenzo. This is accomplished through establishing specifications for the construction of sewer lines, inspecting lines for compliance with those specifications, conducting preventive maintenance of the system, repairing and replacing defective elements of the system, and managing flow rates to stay within the capacity of the collection and treatment systems. The collection system maintains approximately 160 miles of wastewater sewer mains and nine (9) sewage pump stations. The Wastewater Department is divided in two divisions; Collection System Maintenance and Engineering.