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FOG Control Program Manual <br />identified during the line cleaning operation, the area is then evaluated for potential <br />further analysis utilizing closed circuit television (CCTV) inspection. <br />Visual inspection, utilizing CCTV, of the entire collection system is conducted at the <br />frequency established in the SSMP, prioritized on older and more problematic sections <br />of the sewer pipe. Any problems identified during the video inspection are evaluated for <br />repairs, depending on defect severity. Video recordings are made by the contractor and <br />supplied to the City. <br />3.3 Enhanced Maintenance Location Sewer Line Identification, <br />Prioritization and Cleaning <br />Specific reaches of sewer mainlines that require more frequent than normal cleaning, <br />based on a history of FOG -related issues or higher than normal risk for a FOG related <br />SSO, are termed "enhanced maintenance locations". New enhanced maintenance <br />locations are identified during routine collection system maintenance activities by staff <br />when they observe conditions that warrant more frequent cleaning, as well as by City <br />contractors during routine CCTV inspections. Additionally, if necessary, locations <br />experiencing an SSO may be designated as an enhanced maintenance location and <br />cleaned on a more frequent basis as a precautionary measure. The frequency of <br />cleaning for these enhanced maintenance locations are typically quarterly but can range <br />from bi-monthly to annually depending on the severity of the problem and the cleaning <br />effectiveness. Enhanced maintenance locations are evaluated (through the judicious use <br />of CCTV) on an ongoing basis. Additionally, the list of enhanced maintenance locations <br />are periodically reviewed to assess the necessity to maintain high frequency cleaning at <br />each location. Refer to Appendix B for an example enhanced maintenance location <br />Report and Appendix A for an example of a Composite Sewer & Enhanced Maintenance <br />Location Map. <br />3.4 Enhanced Maintenance Location Characterization and FOG Source <br />Identification Activities <br />Many issues in the sanitary sewer system can contribute to an enhanced maintenance <br />location, each with varying degrees of severity. Management of this information for <br />each enhanced maintenance location is necessary to identify effective solutions and to <br />prioritize resources. Sewer line characterization is the process of classification and <br />prioritization of these enhanced maintenance locations in the City's sanitary sewer <br />system. It is important to note that while there are many reasons and causes for <br />enhanced maintenance locations in the sanitary sewer system, the focus of the FOG <br />Control Program is the FOG -related locations. <br />The characterization process consists of collecting all known (or perceived) factors <br />associated with each enhanced maintenance location from the sewer maintenance staff <br />to identify the critical information. Factors related to pipe conditions and potential <br />sources are identified, documented and mapped. Relationships between the various <br />19F-186 5 <br />