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City of San Leandro Sewer System Management Plan Volume I Identification and Sewer Cleaning All lines within the collection system are inspected and cleaned annually. Priority is given to areas with a history of problems relating to FOG, roots or structural impairment. Areas with a history of FOG hot spots are investigated and cleaned quarterly. The areas requiring quarterly monitoring and cleaning frequency aze downtown San Leandro and the service azea surrounding the Bermuda lift station. FOG hot spots are also identified using video imaging equipment. The collection system is on a seven-year digital video recording cycle. The digital images are imported into the ICOM3-DSS infrastructure asset management program for analysis and identification of problem areas. FOG hot spots (azeas with increased incidence of grease build-up) aze cleaned to remove the risk of a blockage occurring and are subsequently inspected once per week. The sewer line is cleaned using either a hydro jet with spinning nozzle or a power rodder. The combo unit/vacuum truck is also used whenever feasible to recover the FOG. Additionally, information on the location, severity and possible source is relayed to the Environmental Services Section. Inspectors follow up at FSEs that may have contributed to the grease build-up. The collection crew continues to monitor the area weekly until the problem is abated through inspection or repair. Documents included in Appendix F: Restaurant P2 letter dated January 22, 2003 Restaurant P2 Survey Food Service Establishment FOG Fact Sheet Food Service Establishment Wastewater and Stormwater Inspection Survey Food Facility Inspection Form Grease Interceptor Guidance Sheet The City of San Leandro Water Pollution Control Plant (WPCP) reported 10 SSOs to the Regional Board during 2003 - 2005. Of the 10 SSOs reported, 3 were grease related. Two of the grease related SSOs occurred in residential areas in 2003 and both were suspected to be caused by dislodged grease mass from a residential lateral. The third SSO occurred in 2005 as a result of an offset sewer pipe near a sausage manufacturer. Although the SSOs were grease related, FOG is not normally an issue in these areas. Approximately 3.6 miles of the gravity sewer system aze on the six-month priority maintenance schedule for flushing or both flushing and rodding, with some of these lines identified as grease problems. Appendix F also contains a figure showing the location of known grease problem lines that are being maintained as part of the prioritized maintenance activities. While the City has known azeas with commercial grease sources (e.g. restaurants), most of the City's grease problems aze in residential areas and the result of lines with poor grade. As part of the City's rehabilitation plan, the City is planning additional CCTV work throughout F~age ~ 2