Advisory For Meramec River From Fenton To Mississippi River Remains In Effect
Work continues on restoring full treatment at the Metropolitan St. Louis Sewer District’s (MSD) Fenton Wastewater Treatment Plant (WWTP) in Fenton, Missouri. Regular testing of the Meramec River by MSD also continues. The latest results can be found here.
In the test results, you will find a green colored number next to the numbers we reported for the February 25, 2016, March 2, 2016, and March 9, 2016 testing. This is testing that the Missouri Department of Natural Resources (MDNR) is conducting as well. While there is a difference in the MDNR and MSD numbers, it is normal to have this type of variance.
The most recent MSD testing, conducted on March 9, 2016, shows increases and decreases in E. Coli levels, both upstream and downstream of the Fenton WWTP. As stated in previous updates, volume of river flow, the amount of direct sunlight on the river, has it rained or snowed recently, and other factors all impact bacterial degradation and water quality results. Accordingly, test results will fluctuate – sometimes dramatically – in one direction or the other, from week to week. To date, we have not observed indications of a fish kill or stress to other aquatic life in the Meramec River.
Missouri American Water is also conducting independent testing of their drinking water. Results of this testing can be found at www.missouriamwater.com. Once at the homepage, find the “Water Quality Reports” header in the upper right corner. Underneath this header is a link titled, “Drinking Water Quality Update: South St. Louis and Jefferson Counties.”
As of March 6, 2016, MSD contractors have worked over 13,400 hours to restore operations at the plant. Much of the work has been related to electrical systems at the plant. Thus far – and as an example of the extensive nature of the repairs that are needed – approximately 73,000 feet (or approximately 14 miles) of electrical wiring has been replaced.
Wastewater continues to go through the primary treatment process on temporary generator power. (Primary treatment is the stage at which solids are removed from the wastewater stream.) Workers are on site around-the-clock to operate and maintain equipment and generators.
We continue to use additives to enhance primary treatment. Dosing rates are being adjusted as needed. The intent is that this temporary step will lead to more efficient removal of solids from the wastewater stream, thereby reducing the bacterial load that is discharged into the Meramec River. The effectiveness of this step and the dosing is being evaluated regularly.
The permanent belt filter press used to process solids is on site and crews are in the process of reinstalling this equipment. We believe that the installation work will be complete this week. The portable press will remain in operation until the permanent press in on-line.
Evaluation of the secondary treatment process equipment – the second step in wastewater treatment that utilizes bacteria to eliminate pollutants – has been completed. We expect to have a schedule available in the next update for the restoration of this process.
All of the major disinfection equipment and controls are back at the plant, and crews are working as quickly as possible on reinstallation. (Disinfection is the third step in the wastewater treatment process from April 1 through October 31.)
Based on the current assessment of the damage and time needed for repairs, it is estimated that full treatment will be brought back on-line in April. Other repairs to ensure backup systems and restore other non-critical functions of the plant will take longer.
While there is no immediate threat to the public’s health or safety, the public is still advised to avoid contact with the Meramec River from Fenton, Missouri, to the Mississippi River. Signs have been posted in areas where the public may readily come into contact with this section of the river. If anyone should come into contact with the river in this area, it is recommended they immediately and thoroughly wash with soap and water.
MSD will continue weekly water quality monitoring of the Meramec River near the Fenton WWTP.
Until the full treatment process is restored at the Fenton WWTP, MSD will make regular updates available on its website, www.stlmsd.com.
For previous updates and other information on the impacts of the December 2015 rains and floods on MSD operations and the Fenton WWTP, please visit http://www.stlmsd.com/blog.
For weekly videos of ongoing work at Fenton WWTP, please visit https://www.youtube.com/user/YourMSD.