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RATIFICATION OF EXPENDITURES FOR EMERGENCY BYPASS PUMPING FOR THE FOURTEEN MILE SANITARY SEWER PUMP STATION
recommended action
RECOMMENDATION
It is recommended that the City Council approve a motion ratifying the emergency expenditure of $3,978.30 to Rain-for-Rent, Inc. of Stockton, for emergency bypass pumping for the North Sanitary Sewer Pump Station.
It is further recommended that the City Manager be authorized to take appropriate and necessary actions to carry out the purpose and intent of this motion.
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Summary
On August 8, 2017, the City Council, as required by Stockton Municipal Code (SMC) Section 3.68.070, approved findings associated with the emergency bypass pumping of the Fourteen Mile Sanitary Sewer Pump Station.
At the time City Council approved the findings, the final cost was not known, and it was indicated the staff would return for final ratification of expenditures for this work. Emergency pumping was conducted on December 26th through December 28, 2017, while Municipal Utilities Department (MUD) staff obtained replacement sewer pumps. Final expenditures for the bypass pumping total $3,978.30.
DISCUSSION
Background
The Fourteen Mile Sanitary Sewer Pump Station is located on Wright-Elmwood Tract and is one of 27 City of Stockton sewer pump stations. This pump station was built in 2007 to convey sewage from northwest areas of the city to the Regional Wastewater Control Facility (RWCF). This station pumps an average of seven million gallons of sewage per day to the RWCF,
In the summer of 2017, one of three pumps failed, leaving the station with only two viable pumps and no redundant pumping capability. Shortly thereafter, on July 25, 2017, one of the remaining pumps suffered a catastrophic failure of unknown cause. Immediate action from MUD staff included the diversion of approximately one-third of the incoming flow to another pump station and the immediate repair of one of the other damaged submersible pumps.
Due to pump failures and urgent need to maintain sewage flow at this pump station, the MUD was granted authority on August 8, 2017, to bypass the competitive bidding process in accordance with provisions of SMC Section 3.68.070, which provides an exception to the competitive bidding process in cases of emergencies. MUD contracted with Rain-for-Rent, Inc. of Stockton, to install a sewer bypass pumping system until MUD staff could complete the rebuild of the damaged pump. It was estimated that it would take four to six months to repair and replace the damaged pump, and Rain-for-Rent, Inc. services would be needed during that time.
Fortunately, the one remaining pump continued uninterrupted service while a pump was rebuilt and installed. Meanwhile, MUD staff evaluated other submersible pumps to serve this station to more effectively match the required operating conditions. Rain-for-Rent, Inc. was not called upon to bypass sewage until December 26, 2017, after one of the two in-service pumps failed. Sewage flow into the station was higher than normal, and the one in-service pump was unable to keep up with the incoming flow. Rain-for-Rent mobilized and operated a bypass pumping system until December 28, 2017, at which time MUD staff located and installed a spare pump from another sanitary station.
Present Situation
Rain-for-Rent estimated a cost for bypass pumping in the range of $230,000 to $300,000 for installing a system for four to six months, respectively. Due to the proactive evaluation of available pumping alternatives, MUD staff minimized the need for emergency bypass pumping to one twelve-hour period on December 27, 2017. With a combination of rebuilt, spare and new pumps, the need for emergency bypass pumping is no longer needed.
In January of 2018, Rain-for-Rent submitted the final cost of $3,987.30 to the City. Based on daily work reports verified by MUD staff, all costs for labor, equipment, and material is correct.
Staff recommends that the City Council act to ratify the expenditure of $3,978.30 to Rain-for-Rent, Inc. of Stockton, for the emergency bypass pumping for the North Sanitary Sewer Pump Station.
FINANCIAL SUMMARY
Sufficient funds were made available from the Wastewater Sanitary Pump Station Operating Expense Account 431-4333-575 for the emergency repair of the Fourteen Mile Sanitary Sewer Pump Station in the amount of $3,987.30 paid to Rain-for-Rent, Inc. of Stockton.
There is no impact to the City’s General Fund or any other unrestricted funds as a result of taking the recommended actions.