Compliance Project Description. The Compliance Project consists of upgrading and repairing sections of the collection system. This will help to reduce inflow and infiltration, sources of significant violations during the rainy season. Violations that can occur due to high flows are: effluent limit violations associated with Coliform, BOD, TSS, Chlorine, Settleable Solids, pH and Chlorine. Inflow is storm water that enters the sewer system from the storm drains. This water comes from runoff from the streets during the rainy season. Infiltration is groundwater that enters the sewer system through cracks or leaks in the sewer pipes. Groundwater can enter through these cracks or leaks whenever sewer lines lie beneath the water table or when the soil above the sewer systems becomes saturated. Groundwater is clean water that, when it enters the sewer system, causes high flows and unnecessary work for the treatment facility. The proposed work will eliminate cracks and leaks, and lower the inflow and infiltration to the collection system and the wastewater treatment plant. The implementation schedule for completion of the Compliance Project is as follows: MILESTONE DEADLINES Bid Preparation and Posting of Bid 4/15/14 Submit Progress Letter 4/15/14 Bid Awarded and Contract Signed 6/20/14 Submit Progress Letter 6/20/14 Construction begins 7/1/14 Submit Progress Letter 8/15/14 Submit Progress Letter 9/15/14 Submit Progress Letter 10/15/14 Submit Progress 11/15/14 Complete Compliance Project 11/15/14 Submit Report of Completion including a detailed list of expenditures 12/31/14
Compliance Project Description. The Discharger has proposed a CP to transition to chloramination wastewater treatment from the current chlorination wastewater treatment to reduce the formation of disinfection by-products (DBPs). The primary reason for transitioning to chloramination is to reduce the likelihood of DBP formation during wastewater treatment. Over the past five years, the Discharger has regularly exceeded effluent limitations for DBPs such as dichlorobromomethane, chlorodibromomethane, total trihalomethanes, and haloacetic acids. As set forth above, TSO No. R1-2017-0045 was issued in November of 2017 to provide interim effluent limitations for the constituents named above. Staff at the Facility, as well as Regional Water Board Staff, believe the transition of wastewater treatment from chlorination to chloramination will reduce the formation of DBPs and bring the Facility back into compliance with effluent limitations. The Discharger plans to implement the project in three stages. The first stage consists of bench-scale testing to determine effective Ammonia dosing amounts and evaluate impacts of chloramination on compliance with Ammonia effluent limitations. In the second stage of the project, the Discharger will conduct full-scale chloramine testing while treated effluent is discharged to its irrigation site, then evaluate the effluent quality at the irrigation site. The final step of the project includes installation of new equipment at the Facility (specifically an ammonia injection system and monitoring equipment), then proceeding with full-system design/installation for surface water discharge. The transition to chloramination wastewater treatment will provide the following benefits: effective pathogen removal, reduction of costs associated with onsite production of sodium hypochlorite, enhanced worker safety at the Facility, reduced operation and maintenance costs, and compliance with effluent limitations and water quality objectives for disinfection byproducts. Implementation of the project began in October 2022, and the project is set to be completed in March of 2025 (fully installed and operational).
Compliance Project Description. Discharger has proposed a two-part project with the objective of updating Crescent City WWTP’s computer system and monitoring devices in order to correct the alleged violations and return to compliance. The first phase of the project will replace the outdated computer system with modern System Control and Data Acquisition (SCADA) computers, as well as replacing the outdated hardware/software. SCADA computers are used to control, monitor, and analyze industrial wastewater treatment. Many of Discharger’s effluent limitation violations were the result of the facility’s outdated, manual computer system. The facility experiences frequent power outages, causing the chemical dosing pumps to shut down and require a manual restart. While the facility has a backup generator, even a brief interruption in electricity disrupts the treatment process. Through the installation of new hardware and software, Crescent City will be able to automate the chemical treatment system and reduce circumstantial effluent limitation violations. The second phase of the project aims to replace the Facility's outdated reagent- based chlorine analyzers with modern amperometric monitoring devices. Similar to the current computer system at Crescent City WWTP, the facility’s current monitoring devices require daily, manual maintenance. Many of the effluent limit violations that Crescent City WWTP has experienced during the violation review period are the result of power outages that interrupt the chemical dosing pumps and chlorine monitoring devices. The new chlorine analyzers will require minimal maintenance, no reagents, and be less susceptible to failure proceeding a power outage. Crescent City plans to buy three new chlorine analyzers (one for chlorine dose, one for chlorine residual, and one spare in case either of the other two needs replacement). This Compliance Project will allow Crescent City WWTP to automate their wastewater treatment process, resulting in a reduction of effluent limit violations and a return to compliance.
Compliance Project Description. The Discharger has proposed a Compliance Project (CP) consisting of three separate improvements to wastewater collection, prioritization, and rehabilitation. The first aspect of the project consists of the purchase and installation of a sewer camera crawler for the purposes of inspecting and identifying key areas of concern associated with discharge violations. The camera crawler will help to reduce the cost of rehabilitation by allowing the Discharger to pinpoint problem areas before and after rehabilitation occurs. The camera crawler manufacturer will provide specialized training to the Discharger’s management staff. To ensure the Discharger’s staff possess the appropriate skills and knowledge to perform camera crawler operation, sanitary sewer troubleshooting, repair technologies, and infiltration and inflow (I/I) diagnostics, the Discharger’s management will incorporate the training material into general staff training sessions throughout the course of this project. The second aspect of the project consists of monitoring lift station pumping data to prioritize zones that receive the highest I/I of stormwater. Updated lift station monitoring equipment will identify locations of high stormwater inflow. Locations where inflow of stormwater is a result of a landowner’s system, the Discharger will work with the individual to identify the solution and require that the landowner implement work needed to resolve the problem. The Discharger’s staff will inspect properties that are identified as high contributors to stormwater I/I, and work with the property owner to develop and implement a rehabilitation plan and schedule. Should a landowner fail to implement a rehabilitation plan in a timely manner, the Discharger may suspend utility service. The Discharger’s staff will investigate the manholes and cleanouts uphill from the lift stations to identify areas of high infiltration. After identifying the problem sections, the Discharger’s staff will operate the camera crawler after introducing dye tablets to the system, in order to identify specific problems within the system to be addressed uphill from the lift stations. Dye tracing will help identify manholes, pipes, and junctions with stormwater I/I, and establish the flow path of the storm drain network. Through visualization, the Discharger’s staff will better understand the root cause of the I/I problems and potentially be able identify the most cost-effective solution(s). The final aspect of the project consi...
Compliance Project Description. Project Purpose: The purpose of the proposed improvements is to enhance wastewater treatment, thereby improving the quality of wastewater effluent and eliminating future effluent violations. The wastewater treatment plant serves the community of Mariposa with a population of approximately 2,000 with a design dry weather flow capacity of 0.61 million gallons per day.
Compliance Project Description. The Discharger has proposed, and is in the process of implementing, a CP consisting of two separate improvements to wastewater treatment efficiency. The first aspect of the project is the replacement of eight existing aerators in Oxidation Pond 1 with eight aerator/blower units. Additional work for this aspect of the project includes replacing the existing electrical transformer, installing a new motor control center for the aerators and blowers and installing electrical line for the blower units. This project will improve biochemical oxygen demand (BOD) treatment in the Oxidation Ponds by providing a source of dissolved oxygen when it is not naturally saturating the wastewater. Additionally, blowers will suspend accumulated solids in Oxidation Pond 1, making the material available for treatment and redistribution within the natural treatment system. The second aspect of the CP is the installation of a baffle wall in Oxidation Pond 2 in an east/west orientation. Additional work for this aspect of the project includes an anchoring system and coordination with the Wastewater Treatment Plant Upgrade engineering team to ensure the baffle wall is compatible with planned oxidation pond modifications. This project will reduce short-circuiting in Oxidation Pond 2, thereby increasing hydraulic retention time and improving treatment efficiency. The primary benefit to water quality is improved biochemical oxygen demand (BOD) treatment in the Oxidation Ponds and a decreased potential for the formation of disinfection byproducts in the chlorine contact basin. Per the project schedule, the CP will be completed by February 26, 2021. Separately from the proposed Compliance Project, the City of Arcata is implementing and planning additional projects that will serve to produce a higher quality effluent, further reducing the potential for effluent limit violations. At present the City’s wastewater treatment facility upgrade project (Upgrade Project) is underway, with first phase completed June 30, 2020, and second phase due to be completed by June 30, 2024. The first phase of the Upgrade Project will include construction of a new 9.8 MGD ultraviolet light disinfection system to replace the existing chlorine disinfection system. During the Complaint period, forty percent of the cited violations were associated with the chlorine disinfection process, namely, effluent limitation violations for disinfection by-products (dichlorobromomethane, carbon tetrachloride and cyanide) and...
Compliance Project Description. The Discharger has secured funds from the Clean Water State Revolving Fund (CWSRF) to upgrade its wastewater treatment facility by replacing the existing treatment system with an extended aeration system, replacing the chlorine disinfection system with an ultraviolet (UV) disinfection system, and constructing a new land application system to eliminate seasonal discharges to the Eel River. In addition, the Discharger has evaluated its wastewater collection system, and has prioritized segments for replacement to reduce or eliminate inflow and infiltration. The Discharger has secured funds from the CWSRF to replace or rehabilitate many of the high priority collection system segments. The Compliance Project to be completed pursuant to this settlement agreement will involve replacement or rehabilitation of additional high priority segments, specifically addressing the collection system at five locations in the town of Loleta:
Compliance Project Description. The Discharger has proposed a CP to replace its belt filter press with a screw press to enhance biosolids dewatering, reduce maintenance time, and improve effluent quality at the Ukiah City WWTP. The primary reason for replacement of the existing belt filter press at the facility is to replace a piece of outdated equipment that is approaching the end of its useful life. The new screw press will provide the following benefits: improved daily operations and maintenance time, reduced annual operations and maintenance costs, increased job site safety, reduced ammonia, nitrate organics, and solids in flows returned to the headworks. Additionally, the new screw press requires less equipment and occupies a smaller footprint than the existing belt filter press. Finally, the reduced headworks ammonia loading and typical 80% ammonia removal achieved across the WWTP will result in an estimated 5.2% reduction in effluent ammonia concentrations. This project is designed to address the exceedances of effluent limitations for ammonia and bring the discharger back into compliance with WDRs Order No. R1-2018- 0035 in a timely manner. The total cost of the project is approximately $1.5 million (see budget in Exhibit B for more information). The budget for equipment accounts for approximately $432,000, while the budget for engineering and installation is approximately $1.1 million. The Discharger has contracted with West Xxxx Engineering Services, for engineering services during construction. A construction firm will be hired in April 2023 for project installation. Procurement of equipment associated with the project began in April 2022, and all equipment should be delivered and ready for installation in September 2023. Implementation of the project will begin in December 2023 will be completed over the following year. The new screw press is scheduled to be fully operational by February 2024.
Compliance Project Description. The project consists of construction of a test pond and four lined treated wastewater evaporation ponds, a concrete wet well, pump stations, buried pipelines, and associated electrical systems. The CP amount ($15,000) is spent on the building of the test pond. The remaining parts of the CP will be funded by a Proposition 1 (Prop 1) grant. The Discharger has been approved for an estimated $1,998,000 in Prop 1 funding for the WWTP Effluent Removal Remediation Project (ERRP). The CP has been designed to correct the violations within five years. The CP completion date will be 150 days from the contractor’s receipt of the Notice to Proceed. After CP completion, the WWTP will no longer need a NPDES permit because it will no longer be discharging to a water of the U.S. The Discharger will instead be discharging to land and will be permitted by Waste Discharge Requirements that will no longer assess MMPs.
Compliance Project Description. Injecting foam and epoxy into leading manholes throughout the sanitary sewer collection system.
