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WASTE DISCHARGE REQUIREMOTS ORDER NO. • Ig CITY OF LATHROP AND METROPOLITAN LIFE INSURANCE COMPANY CROSSROADS TREATMENT PLANT NO. I, SAN JOAQUIN COUNTY ii. A Grading Plan which describes grading activities which will allow application of wastewater in accordance with the WDRs, particularly Section D, Land Application Area Specifications. C. By 11 January 2002, the Discharger shall submit a Sanitary Sewer Collection Operation, Maintenance, Overflow Prevention, and Response Plan (SSO Plan)that describes the actions designed to prevent, or minimize the potential for sanitary sewer overflows. The Discharger shall maintain the SSO Plan in an up-to-date condition and shall amend the SSO Plan whenever there is a change (e.g. in the design, construction, operation, or maintenance of the sanitary sewer system or sewer facilities)that materially affects the potential for sanitary sewer overflows, or whenever there is a sanitary sewer overflow. The Discharger shall ensure that the up-to-date SSO Plan is readily available to sewer system personnel at all times and that sewer system personnel are familiar with it. i. At a minimum, the Collection System Operation and Maintenance portion of the plan shall contain or describe the following: 1. Detailed maps of the sanitary sewer system, identifying sewer mains, manholes, and lift stations; 2. A detailed listing of elements to be inspected, a description of inspection procedures and inspection frequency, and sample inspection forms; 3. Routine inspection and testing of all pipelines, lift stations, valves, and other key system components. The inspection/testing program shall be designed to reveal problems that might lead to accidental spills and ensure that preventive maintenance is completed; 4. Repair or replacement of old, worn out, or defective equipment; 5. Minimize the need for manual operation of critical systems and provide spill alarms or other"fail safe"mechanisms; 6. Properly manage, operate and maintain, at all times, all parts of the collection system that the Discharger owns or over which the Discharger has operational control; 7. Provide adequate capacity to convey base flows and peak flows for all parts of the collection system the Discharger owns or over which the Discharger has operational control; and 8. Take all feasible steps to stop and mitigate the impact of sanitary sewer overflows in portions of the collection system the Discharger owns or over which the Discharger has operational control; and ii. At a minimum, the Overflow Prevention and Response Plan shall contain or describe the following: 1. Identification of areas of the collection system that historically have overflowed and an evaluation of the cause of the overflow; 2. Maintenance activities that can be implemented to address the cause of the overflow and means to prevent fixture overflows. Maintenance activities may