Res 2008-083 - Laserfiche WebLink

Home Browse Search

5. Odor control including the maintenance of bio-filters at lift stations 6. Maintenance activity records (MAXIMO) to support appropriate analysis and reporting • Based on the results of the FOG program, procedures will be developed to adjust the cleaning program to optimize the cleaning process and minimize blockages. Prioritization of preventive maintenance activities can occur through the use of verbal communications, the use of work orders, and/or routine operations such as sewer cleaning based on experience with known problem areas. Data on stoppages or other operational problems is collected in the computer-based information management system and reviewed regularly by system managers for prioritization. A formal condition assessment process that relies on television inspection of specific sewers as part of its prioritization process is frequently enlisted. Section 4 Plan for a Routine Inspection/Maintenance/Replacement Schedule for all Pumps and Electrical Equipment at all Lift Stations The San Marcos wastewater system includes 43 pumping stations. Three small pumping stations are not monitored and the remaining pump stations have SCADA (27) or autodial (13) capability. This state of the art monitoring system immediately identifies failures and sends out an alarm via radio telemetry or autodial telephone. Preventive maintenance is scheduled using MAXIMO and failure classes are maintained in the database. The pumping stations are checked on a weekly or biweekly schedule. Critical key spare pumps, motors and electrical supplies are maintained on-site. Redundancy is designed into each of the pumping stations. At this time staff feels the level of monitoring and control is more than adequate and utilizes best management practices. • Section 5 Plan for the Assessment of all Lift Stations that will assure Adequate Capacity and/or an Alternative Power Source The City of San Marcos contracted with PBS&J to undertake a Wastewater Master Plan. This master plan utilized a dynamic hydraulic model (InfoWorks) that was calibrated from flow metering data collected with the system. A Draft Master Plan has been submitted for review by the staff and contains recommended Capital Improvements Program (CIP) projects that address pipeline, force main and lift station needs. This capacity analysis will be the basis for ensuring adequate capacity within the wastewater collection system. Standby generators are in-place on seven key lift stations. The staff will evaluate each lift station and develop a plan to address power failures both widespread and local outages. Options the staff will consider include: 1. Installation of standby generators 2. Purchase of portable standby generators and retrofit pump stations for external power sources 3. Purchase of portable standby engine driven pumps and retrofit pump station piping 4. Prepare mutual aid agreements with surrounding communities 5. Use of vacuum truck or other short term pumping/hauling options • 4