There are multiple layers of safeguards in place to prevent system failures. All sewer stations in the City have alarm systems to notify the City of failure on a 24/7 basis. The system is inspected, reviewed and repaired on a regular basis. The City's main wastewater pump, the Transbay Pump Station, has a permanent generator and portable generators are used at the remaining pump stations. The City has a Master Plan, which evaluates the sewer and storm systems' structure, integrity and capacity. City workers monitor the weather to prepare for major rain events.