31.08 Mgal/d at a minimum design UVT of 61.3-percent based on the estimated peak flows noted below from the existing filters and new MBR system.
• 11.54 Mgal/d from the existing filtration system (peak day flow due to available equalization) at a minimum design UVT of 55-percent (per the 2012 NWRI UV Guidelines) • 19.54 Mgal/d from the new MBR system (peak hour flow as no equalization will be available for the MBR system flow) at a minimum design UVT of 65-percent (per the 2012 NWRI UV Guidelines)
9.9.1.1 UV Disinfection System Alternative Analysis
Three UV system alternatives were analyzed to achieve a UV dose of 100 mJ/cm2 based on a peak design flow of 31.08 Mgal/d at a minimum design UVT of 61.3-percent. The three Wedeco UV systems analyzed include the LBX 1500e (closed vessel), Duron 6 (open channel), and Duron 8 (open channel).
Manufacturer proposals were obtained for all three systems.
LBX 1500e (Closed Vessel)
The LBX 1500e system is a closed vessel, in-pipe system. In-pipe UV disinfection systems use lamps submerged in closed-chamber reactors. The reactor train is placed within a piping manifold, which provides a disinfection system with minimal footprint. The reactor trains can be isolated by two associated butterfly valves, and all reactor trains are integrated by means of a common inlet and outlet piping manifold. The Wedeco LBX 1500e system uses low-pressure lamps. Low pressure bulbs emit a narrower range of UV radiation (compared to medium pressure bulbs) but have a lower probability of breakage (which releases mercury and glass into the system) because they operate at low temperatures.
To achieve the required minimum UV dose at the peak flow and minimum design UVT, 25 LBX 1500e reactor vessels are needed (24 duty plus 1 standby vessel), with each vessel having 60 lamps for a total of 1,500 lamps.
The equipment cost alone for the system (not including installation/labor, other modifications needed such as demolition of the existing infrastructure and constructing a canopy, or soft cost markups) is approximately $719,000 more than the Duron 6 system and $1,655,000 more than the Duron 8 system.
Considering the higher capital cost and the City’s investment in the existing infrastructure, the closed ATTACHMENT 2
vessel system was not considered further. The UV disinfection system alternative analysis was focused on the Duron 6 versus the Duron 8.
Duron 6 vs Duron 8
Since both the Duron 6 and Duron 8 are open channel systems and the existing two channels are difficult to maintain due to the 10-ft 11.5-inch width, it is proposed for both systems to split the two existing channels into four channels (three duty plus one standby channel). This will facilitate cleaning as the channels will be approximately half the existing width and will also make it easier to take a channel offline for maintenance as only a quarter of the available channels will be offline as compared to half being offline during maintenance activities in the existing system.
Some of the main differences between the Duron 6 and the Duron 8 system are shown in Table 9-2.
Table 9-2. UV Disinfection System Duron 6 vs Duron 8 Comparison Item Duron 6 Duron 8
Watts per Lamp 600 800
UVC Output, watts 210 270
Vertical Incline 45° 65°
Minimum Channel Depth Needed with
Bridge Mounting System, inches 51 79
Minimum Channel Depth Needed without
Bridge Mounting System, inches 74.75 106.3
Proposed System
4 channels (3 duty + 1 standby)
with 24 lamps per bank, 11
banks per channel
4 channels (3 duty + 1 standby)
with 24 lamps per bank, 7 banks
per channel
Proposed Total Number of Lamps 1,056 672
Total Project Cost Estimate $17,879,000 $15,583,000
Key:
Mgal/d = million gallons per day
One of the key construction differences is that the depth of the existing channels (currently approximately 53 inches) will need to be increased to install the Duron 8 equipment while the existing channels with the bridge mounting system can be used with the Duron 6 equipment. However, the Duron 8 system offers several advantages over the Duron 6 system, such as requiring significantly less lamps. In addition to having a lower capital cost, the Duron 8 offers the following enhancements over the Duron 6 system:
• Lamp Power: The Duron 8 uses higher wattage lamps that produces a higher UVC output, as shown in Table 9-2, which allows for less lamps required to achieve the same dose. • Bank Size: The Duron 8 allows for a more efficient, fine-tuned design due to the bank sizing being expandable in two lamp increments (compared to the Duron 6 which is expandable in four lamp increments). The Duron 8 bank size range was expanded to 8 to 72 lamps per bank compared to the Duron 6 which has a bank size range of 12 to 48 lamps per bank.
ATTACHMENT 2
• Installation Flexibility: The Duron 8 utilizes integrated channel walls that allow for greater channel width tolerance and improved flow distribution and dose delivery. Also, the ballast enclosure configurations were expanded, thereby reducing the total number of enclosures and footprint.
• Enhanced Intensity Monitoring: The Duron 8 UV sensor window was reconfigured to allow monitoring of both lamp rows (the Duron 6 sensor window only captured one lamp row). • Wiper Improvement: The Duron 8 wiper rings are in a “stacked” position, which allows for easier access for replacement.
• Maintenance: The Duron 8 module lift motor was relocated to the top of the module for easier access (compared to the Duron 6 module lift motor that sits within the module frame and requires removal of the lamp/sleeve assemblies for access).
• Less Equipment: The Duron 8 wiping and lifting enclosures were combined into one common enclosure to simplify installation and operation.
Recommended UV Disinfection System
The proposed UV system upgrade is the Wedeco Duron 8 (800W), which includes 24 lamps per bank, 7 banks per channel (i.e., 168 lamps per channel and 672 lamps total), and four total channels (three duty plus one standby channel) to achieve a UV dose of 100 mJ/cm2 based on a peak design flow of 31.08 Mgal/d at a minimum design UVT of 61.3-percent. The proposed project includes 1) splitting the two existing channels into four channels, 2) increasing the depth of the existing channels, 3) installing the Duron 8 equipment, 4) replacing the existing shipping containers and the enclosures inside them with freestanding Type 4X stainless steel ballast enclosures each with a side mounted AC unit for internal cooling, and 5) constructing a wall on the south side to block sun exposure to the ballast panels.
Improvements to the UV Disinfection System are included with the recommended Interim Improvement Projects listed in Table 9-3.
9.10 EFFLUENT HANDLING AND DISPOSAL FACILITIES
Treated effluent from the WQCF is disposed of by three methods: 1) On-site land application; 2) Recycled; and 3) Discharge to the San Joaquin River. The disposal facilities consist of the following:
• Irrigation Pump Station and Secondary Effluent Storage Pond (SESP) for on-site land application of undisinfected secondary effluent.
• Recycled Water Transfer Pump Station, Recycled Water Pump Station, and Truck Fill Station for urban landscape irrigation (including the Great Wolf Lodge) and use of recycled water for construction purposes.
• Two effluent pumps and a 36-inch outfall for discharge to the San Joaquin River.
ATTACHMENT 2
9.10.1 Irrigation Pump Station and Secondary Effluent Storage Pond (SESP)
The Irrigation Pump Station is a reinforced concrete structure with four constant-speed, vertical mixedflow propeller pumps. Undisinfected secondary effluent can flow by gravity into the influent channel or stilling well of the pump station or overflow into the SESP.
The SESP is a 9-acre, 15-Mgal storage pond. The excess flow which cannot reach the irrigation fields by gravity will automatically be diverted to the SESP. When the pond is full, the pond level control system will sound an alarm. Generally, the operator will isolate the pond, after which the excess secondary effluent will back up into the line to the Secondary Effluent Equalization Pond, unless one or more of the irrigation pumps are manually started to direct undisinfected secondary effluent to the surrounding fields.
9.10.2 Onsite Land Disposal System
The on-site land disposal system is composed of piping and irrigation structures arranged to gravity feed approximately 117 net usable acres of City-owned property. Each field is equipped for overland irrigation (flood irrigation) via the irrigation header and 36-inch reinforced concrete feeder pipes with discharge structures strategically located along the fields. Each structure has an inlet irrigation-type “alfalfa” valve located directly atop the 36-inch pipe and an outlet weir.
9.10.3 Outfall
Disinfected effluent from the UV Disinfection facility flows into the effluent pump station wet well then through an inlet flap gate leading to a 42-inch final effluent pipe. The final effluent pipe is connected to the 36-inch outfall leading to the San Joaquin River and a 42-inch plant effluent bypass line which discharges into the SESP. The outfall is approximately 14,300 feet long. The plant effluent bypass line is used when the final effluent does not comply with the NPDES permit requirements. Under average flow conditions and low water levels in the San Joaquin River, discharge through the outfall can occur by gravity.
9.10.4 Recycled Water System
The recycled water system delivers disinfected tertiary recycled water (DTRW) to City urban water recycling projects, such as the truck fill station and the Great Wolf Lodge south of the WQCF.
The plant recycled water system includes: 1) two recycled water transfer pumps; 2) a recycled water chlorine contact basin and pump station; and 3) a truck fill station. The two recycled water transfer pumps are in the effluent channel of the UV disinfection system. The pumps transfer DTRW from the UV disinfection system to the recycled chlorine contact basin and water pump station. The transfer pumps are vertical turbine type with one pumping stage and a product lubricated open lineshaft. Each pump has a rated capacity of 2,000 gpm at a total dynamic head (TDH) of 17 ft and is driven by a constant speed 15 hp electric motor. These pumps operate to maintain level in the chlorine contact basin. Hypochlorite is injected into the water as it enters the chlorine contact tank.
ATTACHMENT 2
The recycled water chlorine contact basin and pump station consists of a wet well, two high pressure low flow pumps for plant process water and two low head high flow pumps at the same location for process water and a sodium hypochlorite handling facility. The wet well was previously the chlorine contact tank.
During Schedule D of the Phase III Expansion Project, modifications were constructed at the chlorine contact tank to convert the tank to also act as a wet well for the recycled water pump station. Because of intertie piping with Great Wolf Lodge, only the higher-pressure low flow pumps are used now. The Great Wolf facility needs high pressure all of the time per their contract. The plant can’t use low pressure high flow pumps even for plant water needs because there is a common piping system for both plant water and Great Wolf Lodge.
The low head and high head recycled water pumps are vertical turbine type with product lubricated open line shafts. The large flow low head pumps each have a rated capacity of 2,000 gpm at a TDH of 81 ft and is driven by a constant speed 50 hp electric motor. The low flow high head pumps each have a rated capacity of 400 gpm at 250 feet of head.
The pumps discharge into a 12-inch recycled water pipeline. A second injection point for sodium hypochlorite solution, static in-line mixer, and flowmeter are located downstream of all four recycled water pumps. The 12-inch recycled water pipeline delivers DTRW to the in-plant water system, trunk fill station and the Great wolf Lodge. The truck fill station is located at the entrance to the WQCF and services construction trucks and the general public.
The recycled water system uses the chlorine contact basin to help equalize water usage as well to chlorinate the water. However, the facility is uncovered and attractive to birds. This results in problems with fecal coliform testing even though the water is chlorinated. It is recommended that the basin be covered with Evoqua’s Geomembrane Technologies brand tank covers (same as the aerated grit tanks and primary sedimentation basins), which are retractable arch-supported covers made of highperformance UV-protected membranes. The covers are supported on a low-profile aluminum arch frame so they can be quickly detached and re-attached to provide easy access for operators. It is also recommended that the in-plant water system piping be separated from the pipeline going off site to allow use of the low-head pumps for the in-plant water system and the high pressure pumps for off-site uses including the Great Wolf Lodge.
9.10.5 Effluent Pump Station
Photos of the Effluent Pump Station are shown on Figure 9-14. When the water surface elevation in the San Joaquin River is high, peak flows occur at the plant, or a combination of the two, effluent pumping is required. The liquid level in the effluent pump wet well will rise, triggering an effluent pump to start. The two effluent pumps are close coupled, single stage, vertical turbine pumps. The pumps are equipped with 100 hp motors and each have a capacity of 6,700 gpm at 45 ft of TDH.
ATTACHMENT 2
Figure 9-14. Effluent Pump Station
9.10.6 Performance Assessment of Effluent Handling and Disposal Facilities
The effluent handling and disposal facilities will not require major upgrades until the recycled water system is expanded or cooling towers are added for NPDES permit compliance (as described under the permit requirements section in this chapter). Future recycled water use is described in the Reclaimed Water Facilities Master Plan (Woodard & Curran, January 2023).
9.11 BIOSOLIDS HANDLING FACILITIES
The biosolids handling facilities consist of the following:
• Waste activated sludge thickening with dissolved air floatation thickening (DAFT) • Anaerobic digestion of primary and thickened WAS
• Anaerobic digester control building with associated equipment • FOG and food waste receiving stations
• Biosolids dewatering facilities
• Biosolids drying with open asphalt lined drying beds
9.11.1 Waste Activated Sludge Thickening
Sludge thickening facilities are comprised of two dissolved air floatation thickeners (DAFT). The sludge thickening facilities are responsible for thickening WAS to reduce the anaerobic digester heating ATTACHMENT 2
requirements, minimize required digester capacity; and maximize solids retention time in the anaerobic digesters. The DAFT units were designed to thicken WAS to an approximate concentration of 3%, without using polymer, and 5% with polymer, and capture 85 to 95% of the input solids. Polymer is currently used at the DAFTS.
The sludge thickening facilities are composed of two DAFT tanks. Each DAFT is rectangular above ground concrete tank. Each DAFT includes the following components:
• A float removal system.
• A bottom sludge removal system.
• A subnatant wet well with an overflow pipe to the plant drain and a suction pipe from the pressure recycle pump.
• An effluent weir plate to control the penetration depth of the float skimmer blades in the wastewater.
• A sludge box that receives float and bottom sludge from both tanks and functions as a wet well for the thickened sludge pumps.
• An inlet distribution system to provide uniform distribution of the influent flow in the tank. • Thickened waste activated sludge pump to pump thickened sludge to the digesters.
9.11.2 Anaerobic Digesters
Photos of the Digesters are shown on Figure 9-15. The anaerobic digesters are responsible for stabilizing primary sludge and thickened WAS from the North Plant and South Plant. The purpose of the anaerobic digesters is to stabilize the organic solids in the primary sludge and thickened WAS prior to dewatering. Stabilizing the organic solids has the following benefits:
• Reduces the solids that must be dewatered and disposed • Reduces pathogens
• Eliminates offensive odors
• Improves the ability to dewater the sludge
• Enables compliance with Federal regulations governing the treatment and handling of biosolids (40 CFR Part 503).
ATTACHMENT 2
Anerobic Digester No.1 Anerobic Digester No. 3
Anerobic Digester No. 4 Anerobic Digester No. 4
Figure 9-15. Digesters
The anaerobic digesters are designed to attain volatile solids destruction in the range of 55 to 70% on a weight basis (resulting in an approximate volatile fraction in the digested sludge solids of 50-60%). A digester gas production in the range of 12 to 17 cubic feet per pound of volatile solids destroyed is anticipated as part of the process. Digesters No. 1 and 2 are 60 feet in diameter with fixed steel covers and hold 523,00 gallons each. Digesters No. 3 and 4 are 65 feet in diameter with floating steel covers and hold 662,00 gallons of sludge and 16,500 cubic feet of digester gas each. Each digester is mixed with two 15 hp draft tube mixers pumping 10,000 gpm.
The primary sludge and scum, and thickened WAS are pumped to the Sludge Control Building. From the Sludge Control Building, the combined sludge is routed to one of the four anaerobic digesters by two pneumatically operated valves through the heated sludge/sludge mixing discharge piping. Primary sludge and thickened WAS are each metered to provide equal amounts of sludge to all operating digesters. To maintain a suitable environment for the microorganisms that decompose the sludge, the digesting sludge is maintained at 95°F by continuous sludge circulation through external heat exchangers. The digester gas produced because of the sludge decomposition is collected and piped to the two hot water boilers, ATTACHMENT 2
the BioCNG system, or to the waste gas burner. The boilers provide the hot water needed for heating of the digesting sludge. The waste gas burner ignites and burns the excess (unused) digester gas in a controlled manner. The BioCNG system separates the CO2 from the CH4 in the biogas. The CH4 is then compressed into compressed natural gas (CNG) and sent to the truck loading facilities. CO2 along with waste CH4 is sent to a specialized boiler that burns this gas and recovers heat to the digesters. The digesting sludge is displaced by the incoming sludge through a telescoping valve into an overflow box on the top side of each digester. From the digester overflow boxes, the sludge flows by gravity to the sludge drying beds or routed to the solids holding tank at the sludge dewatering facility.
9.11.3 Anaerobic Digester Control Building
The digester control building controls sludge into each digester including separate metering and control of primary sludge, TWAS, and FOG and food waste. There are also sludge transfer pumps to recirculate sludge from any digester to pick up FOG or food waste at the food waste receiving facilities. The sludge transfer pumps can also transfer sludge between digesters, or to the solids holding tank or sludge drying beds. The building also controls the boilers and heating system to heat and maintain temperature of each in service digester. This includes recovery of heat from the waste gas boiler to the digesters. The building also controls the biogas management system including biogas storage by controlling cover level in Digester No. 3 and No. 4, the production of BioCNG, usage of the boilers, waste gas flaring, and overall usage of biogas and natural gas for the facility.
The air compressors for the plant air system are also located in this building.
Photos of the Digester Control Building are shown on Figure 9-16.
ATTACHMENT 2
Digester Control Building Exterior Digester Control Building Interior Digester Boilers Digester Boilers
Figure 9-16. Digester Control Building
9.11.4 FOG and Food Waste Receiving Stations
Photos of the FOG and Food Waste Receiving Stations are shown on Figure 9-17. The FOG receiving station consists of the following:
• 10,000 gallon receiving tank that is heat traced and insulated. • A Rock trap with manual basket strainer to screen FOG. • Two Wemco chopper pumps rated at 475 gpm at 15 feet to unload trucks and mix the contents of the receiving tank.
• Two Bredel 50 hose pumps rated at 20 gpm at 125 psig to meter the fog into the digesters. • An automated diver control station that controls and logs loads from each driver.
ATTACHMENT 2
Food Waste Receiving Station Food Waste Receiving Station FOG Receiving Station FOG Receiving Station
Figure 9-17. FOG and Food Waste Receiving Stations
The FOG station is not currently operating because the FOG trucks making deliveries were found to have a lot of rags and other debris that were not captured by the rock trap and basket strainer. This led to excessive plugging of the chopper pumps. The system needs a second screen or macerator in addition to the rock trap to function reliably.
The Food Waste Receiving station consists of the following:
• Two Bredel 50 hose pumps rated at 20 gpm at 125 psig to meter the food waste into the digesters.
• Concrete slab.
• Water service with solenoid valves.
ATTACHMENT 2
Food waste is intended to be screened and turned into a slurry at the Lovelace waste transfer facility. The slurry will then be trucked in a container to the WQCF. The transportation container will act as the holding tank and remain at the WQCF and be pumped out over time with the hose pumps. Water connections with solenoid valves can add water to the food waste as needed. This facility has yet to operate as the food waste processing equipment is only now being installed at the Lovelace transfer station.
9.11.5 Biosolids Dewatering Facilities
Photos of the dewatering facilities are shown on Figure 9-18. The mechanical dewatering facility reduces the liquid content in the anaerobically digested sludge generated from the primary and secondary treatment facilities. The mechanical dewatering facility produces dewatered cake with an average dry solids concentration of 19%. Centrate is returned directly to the headworks for treatment.
The mechanical dewatering facility includes the following components:
• 112,000-gallon solids holding tank that receives digested sludge flow from the digesters. • One centrifugal mixing pumps for the solids holding tank. • Two Centrisys centrifuges rated at 185 gpm and 1,540 lbs/hr capacity each. • Sludge holding tank and inline grinder.
• Two centrifuge feed pumps.
• Two polymer dilution units, systems.
• One conveyor that transports the sludge cake to an outdoor covered loading facility where sludge is manually loaded into roll off containers.
ATTACHMENT 2
Solids Holding Tank Dewatered Cake Loading Facility
Centrifuge Feed Pumps Centrifuges
Figure 9-18. Solids Dewatering Facilities
The dewatering facility operates properly. However, the WQCF does have a serious struvite problem and this struvite has impacted maintenance costs on the centrifuges, making them expensive to maintain. The centrate return from the dewatering facilities also drastically impacts the nitrogen treatment ability of the secondary treatment process.
9.11.6 Biosolids Drying Facilities
The sludge drying beds were used to dry biosolids prior to the construction of the dewatering building.
The south beds have been abandoned and are now used for equipment storage. The north drying beds are now used only as a place to periodically empty the digester contents for cleaning, and occasionally for storage of dewatered biosolids when disposal is not available.
ATTACHMENT 2
9.11.7 Performance and Capacity Assessment of Biosolids Facilities
The existing biosolids handling facilities are functioning satisfactorily with the following exceptions:
• Digesters No. 1 and 2 need an overflow box that discharges to the solids holding tank similar to Digesters No. 3 and 4.
• New grating and handrailing at the digester gas relief valves is needed for all four digesters. • The existing waste heat radiator is undersized and needs to be replaced with a larger radiator. • The existing FOG receiving station basket screen does not work very well. A replacement screening system is recommended for the FOG Receiving Station.
The impact of the centrate return on the nitrogen treatment capabilities of the main process is very significant. The main treatment process is currently overloaded on nitrogen treatment capacity. As a result of this, only one centrifuge can be run at a time with a flow limit of 115 gpm. This is well below the centrifuge capacity of 185 gpm. Side stream treatment of the centrate is needed to reduce the impacts of the dewatering return on the main plant process and allow full use of the dewatering facility, Side stream treatment of the centrate is recommended and included with the Interim Improvement Projects list in Table 9-3.
Even with side stream treatment, the centrifuge facility will be required to run both centrifuges with the increased loadings from the Interim Projects and will not have a redundant centrifuge. A third centrifuge, or equivalent dewatering equipment, new sludge feed pump, and new polymer blending unit are recommended and included in the Interim Improvement Projects. Considering future dewatering capacity needs for the Phase IV Expansion Project (discussed further in Section 7.9), it is recommended to install a larger centrifuge than the existing equipment. The new centrifuge is recommended to have a minimum capacity of 260 gpm and 3,000 dry lb/hr.
Currently, the plant is required to run both DAFT units continuously to keep up with WAS loading. This will become more critical when the WAS system is expanded. A redundant DAFT is required to allow maintenance on the DAFT system. A new DAFT is recommended and included in the Interim Improvement Projects.
Recommended improvements to the Biosolids Handling Facilities are included with the Interim Improvement Projects listed in Table 9-3.
9.12 BIOGAS UTILIZATION FACILITIES
The biogas utilization facilities consist of the following:
• Floating steel covers on Digester No. 3 and No. 4 for low pressure gas storage.
ATTACHMENT 2
• Biogas H2S removal system consisting of ferric chloride chemical feed system to each digester followed by H2S removal vessel and media.
• Biogas booster blowers to pull biogas through the H2S media and provide pressure for the biogas users.
• Hot water boilers to heat the anaerobic digesters
• Biogas Compressed Natural Gas (Bio-CNG) System
• Waste gas boiler to burn waste gas from the Bio-CNG process • Waste Gas Flare to burn excess biogas
• CNG Fueling Station
• 400 kilowatt (kW) electrical generator (currently abandoned)
9.12.1 Floating Steel Gas Covers
Digester No. 3 and No. 4 have floating steel covers that allow storage of low-pressure digester gas. Each cover can hold up to 16,500 cf of biogas. The covers float on the gas and the cover level is used by the SCADA system to control biogas usage at the facility.
9.12.2 Biogas H2S Removal System
Hydrogen sulfide (H2S) has to be removed from the biogas to protect combustion equipment and eliminate sulfur dioxide generation. This is a two-step process at the WQCF. Step one is to inject ferric chloride into each digester. This system consists of two 1,500-gallon chemical tanks and a dedicated chemical metering pump for each digester. Ferric Chloride is dosed to reduce the H2S in the biogas from 2,000 ppm to approximately 300 ppm. Approximately 160 gallons per day of ferric is dosed in the digesters. The biogas is then sent to the H2S media vessel which uses absorption media such as Sulfatreat to reduce the H2S to less than 5 ppm. The H2S removal system works well. However, the two 1,500-gallon chemical tanks are too small for a full bulk chemical delivery, thereby increasing the chemical cost on a per gallon basis and preventing some vendors from servicing the WQCF.
9.12.3 Biogas Booster Blowers
Four hermetically sealed multi-stage biogas booster blowers are used to pull biogas through the H2S media vessel and provide pressure to the gas flare, boilers, or BioCNG equipment. Each booster blower is rated at 130 scfm at 2 psig discharge pressure and 5 hp. The blowers are staged on and off by SCADA based on the biogas equipment operating.
ATTACHMENT 2
9.12.4 Hot Water Boilers
There are two hot water boilers with an output heat rating of 3.34 million BTU/hr each dedicated to heating the digesters with hot water. The boilers can fire biogas or natural gas. There are no operational issues with the boilers.
9.12.5 Bio-CNG System
Photos of the Bio-CNG system are shown on Figure 9-19. The BioCNG system from Unison uses membrane technology to separate CO2 from CH4 in the biogas. Siloxanes are also removed from the biogas as part this process. The CO2 along with a small amount of leak through CH4 (Off Gas) is burned in a waste gas boiler and used to heat the digesters. The purified CH4 is compressed into CNG and sent to the truck loading facility for use in City garbage trucks. The BioCNG system produces 500 diesel gallon equivalents (DGE) of CNG for City use.
Compressed Biogas Fueling Facility H2S Removal and BioCNG Generation Equipment
FOG Storage Tank and Off Gas Equalization
Tank
H2S Removal and BioCNG Generation
Equipment
Figure 9-19. Bio CNG System
ATTACHMENT 2
9.12.6 Waste Gas Boiler
A 1 million BTU/hr waste gas boiler burns the off gas from the BioCNG system. This boiler incorporates a fuel blending system to use additional natural gas to achieve combustion in the boiler. All heat is recovered to heat the digesters. Excess heat is sent to an exterior radiator.
A waste gas flare rated at a maximum flow of 300 SCFM and 10 million BTU/hr is used to burn excess biogas when not needed for heating or CNG production. The flare is an enclosed type with a blower and motorized louvers that controls the combustion temperature to 1,600F meeting air board regulations. The flare turns on and off by SCADA based on cover levels in Digester No. 3 and 4.
9.12.7 CNG Fueling Station
Photos of the CNG Fueling Station are shown on Figure 9-20. The CNG fueling system utilizes the following equipment.
• Two low pressure CNG storage vessels each storing 12,400 scf of CNG at 80 PSIG maximum pressure
• Fifteen high pressure storage cylinders each storing 11,430 scf of CNG at 4,500 psig maximum pressure
• Two 200 hp gas compressors each rated at 450 scfn of CNG at a discharge pressure of 4,500 psig. The compressors are used on both BioCNG gas and natural gas as if there is not enough BioCNG to keep up with fuel demands.
• A gas dryer to dry the BioCNG and natural gas prior to compression. • Two hydraulic compressors (HY-C) to pump CNG from the high-pressure storage vessels to the fuel dispensers.
• One fast fill and 32-time fill fuel dispensers.
• SCADA control of the system.
The CNG fueling station is used daily by the truck fleet and is functioning properly without issues.
ATTACHMENT 2
CNG Fueling Station CNG Fueling Station Pump
BioCNG Compressor BioCNG Storage Tanks
Figure 9-20. CNG Fueling Station
9.12.8 400 kW Generator
A 400-kW generator was installed as part of the phase III expansion. At the time of installation the generator was unable to pass air permit requirements and has not been operated since installed. The generator has been out of service for more than 10 years and is abandoned.
9.12.9 Performance Assessment of Biogas Utilization Facilities The existing biogas utilization facilities are performing satisfactorily and are not planned to be expanded with the Phase IV Project Expansion Project.
Digester heat demand is less than anticipated and the waste gas boiler radiator is too small to handle the excess heat and a larger replacement radiator is recommended for system stability. Plant staff at times are forced to dump heat into the out of service digester which is not a desired long-term solution.
ATTACHMENT 2
The H2S removal system works well. However, the two 1,500-gallon chemical tanks (ferric chloride) are too small for a full bulk chemical delivery, preventing some vendors from servicing the WQCF. The smaller tanks also increase the cost of the chemical as the freight charge on a per gallon basis is higher.
It is recommended to replace the two 1,500-gallon chemical tanks with two 2,700-gallon chemical tanks (ferric chloride) so a full bulk chemical delivery can be received, thereby reducing the per gallon cost of the chemical and making it possible for other vendors to service the WQCF.
9.13 ELECTRICAL SUPPLY AND DISTRIBUTION
The electrical power system for the WQCF includes the following components: 1) 17kV switchgear; 2) 17 kV cabling system; and 3) Power distribution equipment to loads.
9.13.1 Normal Electrical Power System
The WQCF receives power from Pacific Gas & Electric (PG&E) at 17kV from overhead distribution lines via a PG&E-owned 17kV above ground distribution cable serving the site that undergrounds right before the 17kV switchgear. The site 17kV switchgear consists of a lineup of outdoor-rated enclosures containing the incoming cable termination section, utility revenue metering equipment, a main vacuum circuit breaker, and two feeder vacuum circuit breakers (A and B). Auxiliary compartments in the switchgear contain voltage transformers, protective relays and controls, a control power transformer and switchgear batteries used for close and tripping power for the circuit breakers.
The 17kV cabling system distributes power from the site 17kV switchgear to each of the 17kV:480-volt pad mounted transformers located at the various process areas. Two sets of 17kV feeder cables are routed from the switchgear (one set from each of the two feeder circuit breakers (A and B)) to each of the pad mounted transformers to provide a redundant path for the distribution of 17kV power in the event of a 17kV feeder cable or 17kV feeder breaker failure. The 17kV cabling system is routed to each of the process area pad mounted transformers via a series of underground conduits and medium-voltage vaults. 480-volt main switchboards are located at all process areas to provide service to local loads. 480-volt main switchboards contain automatic transfer switches (ATSs) to serve process loads from normal utility power and during an outage from the site emergency generator system. Service to the 480-volt main switchboard from normal utility power is from the local process area 17kV pad mounted transformer (described previously) to the normal power terminals of the ATS. The load terminals of the ATS provide both normal and emergency backed power to the 480-volt main switchboard bus. 480-volt feeder breakers at the main switchboard bus feed process area motor control centers (MCC), and other 480- volt loads.
9.13.2 Emergency Electrical Power System
The purpose of the emergency power system is to generate and distribute emergency power to all process loads connected through their automatic transfer switches (ATSs) at the individual process areas to the emergency power system.
ATTACHMENT 2
There are four emergency generators at the WQCF. The generators are located at the IPS (1 generator), Effluent MCC/Generator Building (1 generator), and SSF MCC Building (2 generators). A future fifth emergency generator is planned for the Effluent MCC/Generator Building. The Effluent MCC/Generator Building is designed to accommodate this future emergency generator and its related switchgear.
The four emergency generators are identical Caterpillar diesel generators, rated 1500kW at 0.8 power factor (1875 KVA), with 480-volt, three-phase wye-grounded power output. Each generator has its own PLC-based control panel with graphical operator interface display providing alarms, diagnostics, status, and analog trending data.
9.13.3 Performance Assessment of Electrical Supply and
Distribution
The existing electrical power system is performing satisfactorily and will not require major upgrades until the Phase IV Project Expansion Project.
The existing generators come on at the same time in parallel and load shed as needed. The generator system is performing satisfactorily. However, the generators run on analog Modbus, and controls need to be updated to interface better with the plant electrical system. The fifth emergency generator at the Effluent/Generator Building will not be required until the Phase IV Expansion Project.
9.14 INSTRUMENTATION AND ELECTRICAL CONTROLS
The WQCF is equipped with instrumentation and electrical controls which provide local monitoring and analytical capability as well as both manual and automatic process controls.
The City of Manteca has standardized on the use of Schneider-Electric Modicon PLCs for its controller platform. This platform of PLCs is used across all City systems including at the WQCF, remote lift and stormwater pumping stations, and at water facilities. Approximately 75% of controllers at the WQCF are Modicon with the majority of these being legacy Quantum, Compact, and Momentum models. There are a few Allen-Bradley PLCs mostly from package process control systems.
Each major process area has a programmable logic controller (PLC) to provide automatic process control and to function as a communication controller. Supervisory Control and Data Acquisition (SCADA) servers at Administration/Laboratory Building pull data directly from the PLCs. The communication protocol used is “Ethernet” over fiber optic cables in a star configuration between the PLCs and the SCADA servers.
The existing operator interfaces are mainly split between Schneider-Electric Magelis touchscreen interface terminals and Rockwell PanelView Plus touchscreens that have been provided with package systems. These operator interfaces are used by field operations to monitor systems and to make changes in the field. In some cases, these field interfaces only provide monitoring and control of specific processes and are generally from package system suppliers. In some cases, these local operator interfaces have additional information and functionality that has not been provided at the overall SCADA system, such as filter, power distribution, and UV systems.
ATTACHMENT 2
9.14.1 Performance Assessment of Instrumentation and Electrical Controls
A SCADA Master Plan for the WQCF was completed in 2020 by Carollo Engineers. The Master Plan identified numerous operational and hardware deficiencies with the SCADA system. The following is a list of recommended improvements:
• Provide new core SCADA server and network system migrating to Ignition SCADA HMI software. • Provide remote site PLC upgrades for sewer and stormwater lift stations. • Replace existing WQCF legacy PLC systems and associated network hardware as well as the operator interfaced terminals (OITs) for modernization and standardization of equipment and added system reliability (this project was titled “WQCF Control Panel Upgrades” in the 2020 SCADA Master Plan but the fiber optic cabling portion of the project was already completed). • Upgrade switchgear and power systems PLCs to latest supported model.
Recommended improvements to instrumentation and electrical controls are included with the Interim Improvement Projects listed in Table 9-3.
9.15 AUXILIARY SYSTEMS
The WQCF auxiliary systems include the chemical handling facilities, biofilters, and the plant water well system.
9.15.1 Chemical Handling Facilities
The chemical handling facilities include polymer blending/feed systems, chemical metering pumps, and chemical storage tanks. The chemical storage tanks were designed to hold polymer, poly aluminum chloride (PAC), and caustic soda. Coagulant and polymer can be added to secondary effluent immediately following the FFPS through a chemical injection line. Chemical addition is required by Title 22 when filter influent turbidities are greater than 5 NTU for more the 15 minutes. Historically, when the secondary treatment process is functioning well, chemical addition is not necessary. Caustic soda is injected when necessary to control pH levels.
9.15.2 Biofilter Systems
The biofilters are used to reduce the odorous gasses present at the Headworks and IPS and primary treatment facilities. Three biofilters are located at the WQCF. A lava rock biofilter which is described in the Headworks and IPS section of this chapter. Premanufactured “Biocube” odor control biofilter systems are located near the northside and southside primary treatment facilities (aerated grit tanks and primary sedimentation basins). The Biocube systems treat foul air from the covered aerated grit tanks and primary sedimentation basins. The Biocube biofilters are currently not in operation because the covers must be left open for maintenance access.
ATTACHMENT 2
9.15.3 Plant Water Well System
The plant water well is located south of the recycled water pump station. The well was installed as part of the Phase III Expansion Project, Schedule D, to replace the existing wells at the plant. The plant water well consists of the well, pump, and a sand filter. This well system serves as a backup to the recycled water system and is connected to the same piping.
The plant water well is approximately 200 ft deep with a 16-inch diameter casing. The plant water well pump is a five stage, vertical turbine type pump with a rated capacity of 670 gpm at a TDH of 280 ft. and is driven by a constant speed 60-hp electric motor. The motor is equipped with a variable frequency drive.
9.15.4 Performance Assessment of Auxiliary Systems
The existing auxiliary systems are mostly performing satisfactorily except none of the aerated grit tanks and primary sedimentation biofilters are not in use because the odor control covers for are too heavy and difficult to open and close for maintenance, and therefore, are being left open.
The chemical handling caustic tanks and piping was not insulated, or heat traced. The WQCF needs caustic for alkalinity in the winter. To save money caustic is purchased as 50% solution, but the pipes will freeze which creates operational problems.
Future recycled water use is described in the Reclaimed Water Facilities Master Plan (January 2017 revised draft) and recommended improvements from this report may require modifications to the Reuse Pumps and backup plant water system.
9.16 RECOMMENDED INTERIM IMPROVEMENTS
A capacity study of the WQCF was recently completed (City of Manteca WQCF 2021 Capacity Assessment prepared by HERWIT Engineering [HERWIT] and Stantec, March 18, 2022) that determined immediate improvements to the WQCF that are needed for nitrogen removal. Without these improvements, the WQCF will be challenged to meet permit requirements for the projected near-term flows and loadings. The following Table 9-3 lists the improvements and project costs from the WQCF 2021 Capacity Assessment, basis of design information from PACE and HERWIT Engineering for the secondary treatment improvements, and other improvements that were identified in this chapter from previous studies and interviews with plant staff.
The Interim Improvements project costs were developed from previous study cost estimates adjusted to the March 2023 Engineering News-Record Construction Cost Index (ENRCCI) 20-Cities Average of 13,176. Where previous cost estimates were not available, construction costs were developed using costs for similar construction at other wastewater treatment plants and equipment manufacturer quotes.
Project costs for each item in Table 9-3 were estimated as separate projects with 35 percent added to the construction estimate for engineering, construction management and administration.
ATTACHMENT 2
Table 9-3. Recommended Interim Improvements Project Costs1 WQCF
ID Description Estimated Project Cost
Recommended Interim Improvements Needed Immediately
1 North and South Plant WAS Pump Replacement Project $2,827,000 2 South Plant RAS Pump Replacement Project $1,652,000
3 North and South Plant Aeration Basins Improvements $11,696,000 Subtotal $16,175,000
Interim Improvements for Additional Surety and Ability to Accept Food Waste 2 4 Add sidestream treatment of sludge dewatering return flows to reduce nitrogen loads to the secondary treatment system, thereby improving nitrogen compliance and sludge settleability and providing flexibility to accept food waste. $20,205,000
5 Add Centrifuge No. 3 to process additional solids at the dewatering building. $5,130,000 6 Add DAFT No. 3 to provide redundant DAFT for thickening of sludge prior to digestion 2 $3,930,000 Subtotal $29,265,000
Instrumentation and Electrical Control Improvements 3
7 Core Supervisory Control and Data Acquisition (SCADA) System $1,127,000 8 Remote Site Process Logic Controller (PLC) Upgrades $1,727,000 9 PLC and Operator Interfaced Terminal (OIT) Replacement $1,374,000 10 Switchgear PLC Upgrades $127,000
Subtotal $4,355,000
Other Improvements
11 Add Influent Pump No. 5 $1,048,000
12 Lightweight Covers for aerated grit tanks, primary sed. basins, & chlorine contact tank $5,792,000 13 Repair Biofilter and modify ventilation system at Headworks and IPS 4 $2,080,000 14 UV Disinfection System Upgrade $15,583,000
15 Piping Modification to Separate Plant Water System from Off-Site Reclaimed Water $636,000 16 Replace Secondary Effluent Equalization Pond Liner $2,101,000 17 Headworks Screen No. 3 5 $900,000
18 FOG Receiving Station Screening System $200,000
19 Bulk Ferric Chloride Solution Tanks $351,000
20 Construct new overflow boxes and piping for Digesters No. 1 and 2 $706,000 21 Provide platform and handrail for gas pressure relief valves at all digesters $205,000 22 Install new waste heat radiator $198,000
Subtotal $29,800,000
Grand Total $79,595,000
Notes:
1 Total project cost includes 35% of the total construction cost for engineering, construction management and administration. 2 Costs escalated from WQCF 2021 Capacity Assessment. 3
Costs escalated from the report, City of Manteca WQCF SCADA Master Plan – Technology Drive Solutions for Safe and Reliable Water Quality (Carollo Engineers, Inc., April 2020). 4 Cost escalated from the technical memo, Manteca WQCF Biofilter Evaluation (HERWIT and Stantec, February 2015). 5 Cost obtained from the recent project, WQCF Bar Screen Project, which was started up in October 2022.
Key:
WAS = waste activated sludge
RAS = return activated sludge
IMLR = internal mixed liquor recycle
DAFT = Dissolved Air Flotation Thickener
ATTACHMENT 2
10.0 WQCF PHASE IV EXPANSION PROJECT
To accommodate future increases in flows and loads the 2007 WQCF Master Plan Update prepared by Nolte Associates Inc. anticipated, under the Phase IV Expansion Project, expanding treatment capacity to
17.5 Mgal/d (ADWF) and another Phase V Expansion Project to accommodate build-out conditions at 27 Mgal/d (ADWF). The current Manteca full build-out flow presented in this WWMP (see Chapter 5) is approximately 15.3 Mgal/d (ADWF). Adding Lathrop’s flow contribution of 1.45 Mgal/d (14.7% of 9.87 Mgal/d) gives a total flow of 16.8 Mgal/d (ADWF). Planning the next expansion for 17.5 Mgal/d (ADWF) would provide enough treatment for Manteca’s full build-out flow plus Lathrop and any additional flow contributions from other developments outside of the City up to a limit of 0.70 Mgal/d (ADWF).
Based on a population growth rate of 2.8% and assuming influent loadings to the WQCF increase proportional to population growth, the proposed Interim Improvements will provide treatment capacity until January 2030. The Phase IV Expansion Project would then increase the true ADWF capacity (without inplant recycle) from 8.23 Mgal/d to 17.5 Mgal/d and provide treatment capacity until the year 2057 serving an equivalent Manteca population of 236,000 as shown on Figure 10-1.
Figure 10-1. Estimated Population Growth and Proposed WQCF Phase IV Expansion Expansion from 8.23 Mgal/d to 17.5 Mgal/d (i.e., building 28 years of treatment capacity) in one stage is not recommended because discharge permit requirements are subject to change every five years and future wastewater treatment technologies could make the current treatment technologies obsolete a decade from now. This alternatives analysis will assume the Phase IV Expansion Project is constructed in two stages (Stage 1 and Stage 2) with each stage having an incremental treatment capacity of 4.65 ATTACHMENT 2
Mgal/d ADWF (approximately 9.3 Mgal/d total of treatment capacity will be added when the two stages are completed).
The remainder of this chapter includes the following sections:
• Treatment Process Selection
• Recommended Phase IV Expansion Project
• Phase IV Expansion Project Costs
10.1 TREATMENT PROCESS SELECTION
The following treatment processes alternatives for the Phase IV Expansion Project are identified and described in this section:
• Alternative 1: Conventional Activated Sludge (CAS) Process. • Alternative 2: Membrane Bioreactor (MBR) Process.
• Alternative 3: Sequencing Batch Reactor (SBR) Process. • Alternative 4: Integrated Fixed-Film Activated Sludge (IFAS) System. • Alternative 5: Granular Activated Sludge (GAS) Process.
10.1.1 Alternative 1: Conventional Activated Sludge (CAS) Process
The conventional activated sludge system for biological nitrogen removal uses the Modified Lutzak Ettinger (MLE) process, similar to the existing Southside Plant. Key components of the MLE process include reactor basins, secondary clarifiers, and a RAS pump station. The reactor basins include preanoxic zone followed by aerobic zone. At the end of the aerobic zone, there is an internal mixed liquor recycle pumping system that recycle mixed liquor back to the beginning of the pre-anoxic zone. Mixed liquor flows to the secondary clarifiers where sludge settles to the bottom and returned to the anoxic zone, whereas clarified effluent flows over the clarifiers weirs.
Primary sedimentation tank effluent is mixed with the return activated sludge (RAS) and flow to the anoxic basin where microorganisms utilize nitrates instead of oxygen for BOD removal. Nitrate is fed to the anoxic basin by two streams: (1) the RAS; and (2) the internal recycling from the end of the aeration zone. Mechanical mixers would be provided in the anoxic basin to keep the solids in suspension. Aeration is provided using air diffusion and blower system to supply oxygen needed for BOD and ammonia oxidation.
ATTACHMENT 2
10.1.2 Alternative 2: Membrane Bioreactor (MBR) Process A membrane bioreactor (MBR) is a suspended growth biological treatment system like conventional activated sludge. However, in the MBR, the secondary clarifier is replaced by a membrane filtration system. Membrane filtration units are typically placed inside activated sludge reactor basins that are specifically designed and located for this use (membrane basins). Treated wastewater effluent is drawn through the membranes, leaving activated sludge solids behind. The membranes provide such a high level of solids removal, that the effluent from the MBR does not need further filtration, such as required with conventional activated sludge. In fact, the MBR effluent is superior to the effluent of a conventional activated sludge system followed by effluent filters, having a typical effluent turbidity less than 0.2 NTU, compared to 2 NTU for the conventional system. The low turbidity is highly reliable because the membranes provide an absolute barrier to solids larger than the pore size of the membranes. Because solids settling is not required in a MBR system, mixed liquor solids concentrations can be typically about three times as high as those in a conventional activated sludge system. Because of this and because there is no need for clarifiers or separate filters, the MBR system will have a much smaller footprint than a conventional system.
10.1.3 Alternative 3: Sequencing Batch Reactor (SBR) Process The Sequencing Batch Reactor (SBR) system is an activated sludge process designed to operate under non-steady state conditions. The SBR process is a fill and draw process that operates in a true batch mode with aerobic conditions, anoxic conditions, and sludge settlement all occurring in the same tank.
The SBR process eliminates the need for secondary clarifiers, RAS pumping, and internal mixed liquor pumping.
Primary effluent is introduced into the SBR tank, one batch at a time. Normally, a minimum of two SBR tanks are provided, so that one tank receives wastewater at a time. Wastewater treatment is achieved by a timed sequence of operations which occur in the same SBR Tank, consisting of filling, reaction (aeration), settling, decanting, idling, and sludge wasting. The various stages in the sequence are as follows:
• Stage 1: Fill – During fill, the influent valve is opened allowing raw influent to enter the basin. At the beginning of the fill period, no aeration is allowed to promote anoxic conditions, which discourages the growth of filamentous bacteria and promotes nitrate removal. During the later part of the fill period, the aeration system is turned on to allow BOD oxidation and Simultaneous Nitrification/ Denitrification (SND). The high oxygen uptake creates an aerated anoxic condition where blowers are operated yet residual D.O. levels remain near zero. • Stage 2: Reaction – Once the SBR reaches top water level or the designated fill time has been reached, the flow will be diverted to another SBR basin. Aeration and mixing occur in the rector until complete biodegradation of organics has occurred. Since no flow enters the basin during react, no short circuiting of raw, untreated waste can occur. The aeration system can be cycled on / off to help promote denitrification, if needed.
ATTACHMENT 2
• Stage 3: Settling – Following react, the SBR will begin a settle mode in which liquids / solids separation occurs. No influent enters the basin during this period, allowing for a perfect quiescent condition. All the reactor volume is used for solids separation. The settle period typically lasts for 45 minutes but is field adjustable through the operator setpoints. • Stage 4: Decanting – The effluent withdrawal (Decant) begins once the settling period is completed. A floating decanter is used to maximize interface between the withdrawal ports and the settled biomass. The decanter is designed to remove effluent from below the water surface to prevent the inclusion of foam, scum, or floatable materials. Typical systems will have roughly 25%-35% of the basin contents removed from the upper portion of the reactor during the decant period.
• Stage 5: Idling – During idle, waste activated sludge is typically removed to maintain a desired biomass inventory in the reactor. The aeration and mixing system are typically not operated during idling and the reactor simply waits for the next cycle to begin.
10.1.4 Alternative 4: Integrated Fixed-Film Activated Sludge (IFAS) System.
The IFAS is a process that includes fixed-film media inside conventional reactor basins so that the biomass will grow both on the media (attached) and in the bulk liquid (suspended). The biofilm on the media has a longer SRT than the bulk liquid SRT, which is beneficial to retain the slow growing microorganisms (nitrifiers) in the system. The media can be either fixed (web-type media or structured sheet media) or floating (loose plastic shapes that are free to circulate throughout the reactor basin).
Screens or sieves would be used to keep the floating media from flowing out of the reactor basin with the mixed liquor outflow.
10.1.5 Alternative 5: Activated Granular Sludge (AGS) Process AGS is a process in which microorganisms form dense granules rather than light flocs generally formed in conventional activated sludge. Granular sludge is compact and settles rapidly, which results in an increased capacity for a given volume by allowing the process to operate at higher mixed liquor concentrations. Granules consist of layers of specialized bacteria in aerobic, anoxic, and anaerobic zones, which allows nitrification, denitrification and enhanced biological phosphorus reduction processes to occur simultaneously.
AGS is a relatively new technology, and new methods for creating and sustaining a granular sludge are continuously under development. Most current methods rely on selectively wasting less-compact sludge and creating conditions that favor granule-forming biomass. AGS operation is similar to sequencing batch reactor (SBR) operation where all treatment (organics removal, nutrient reduction, and solids settling) takes place in one tank.
ATTACHMENT 2
10.1.6 Screening Criteria Matrix
The above five technologies were screened based on eight evaluation criteria shown in Table 10-1.
Alternative 1 - CAS and Alternative 2 – MBR have the highest favorable ratings and are shortlisted for further evaluation.
Table 10-1. Secondary Treatment Alternative Screening
Alternative 1
Conventional
Activated
Sludge
(CAS)
Alternative 2
Membrane
Bioreactor
(MBR)
Alternative 3
Sequencing
Batch
Reactor
(SBR)
Alternative 4
Integrated
Fixed
Film
Activated
Sludge
(IFAS)
Alternative 5
Activated
Granular
Sludge
(AGS)
● ● ● ● ●
* Robust secondary
treatment
* Robust secondary
treatment
* Robust secondary
treatment
* Performance of biofilm
processes is difficult to
predict or model
* Performance of granules
is difficult to predict or
model
● ● ● ● ●
* Tried-and-true * Proven technology * Proven technology * Performance of biofilm processes are difficult to
predict or model
* AGS is relatively new
● ● ● ● ●
* Operations familiar with
the system
* Highly automated
* Operators will operate
two systems
* Highly automated
* Operators will operate
two systems
* Highly automated
* Operators will operate
two systems
* Highly automated
* Operators will operate
two systems
● ● ● ● ●
* Efficient BNR process * Required increaseed
energy consumption for air
scour and low alpha
* Membrane replacement
* Chemicals used for
membrane cleaning
* Efficient BNR process * Required increaseed
energy consumption due
to high DO set point
* Required increaseed
energy consumption due
to high DO set point
● ● ● ● ●
* Not a proprietary
process
* Proprietary process.
Several vendors can supply
* Proprietary process.
Several vendors can supply
* Proprietary process. Few
vendors can supply
* Proprietary process. Few
vendors can supply
● ● ● ● ●
* Requires large footprint * Compact * Compact * Compact * Compact ● ● ● ● ●
* Low nitrogen
concentration, moderate
turbidity turbidity
concentration
* Low nitrogen and
turbidity concentrations
* Filtered
* Low nitrogen
concentration, potential
high effluent TSS due to
scum
* Low nitrogen
concentration, moderate
turbidity turbidity
concentration
* Potential high effluent
nitrogen and TSS.
● ● ● ● ● * No effect * No effect * Post equalization
required for continuous
flow to UV
* No effect * Post equalization
required for continuous
flow to UV
● Favorable ● Moderate ● Not Favorable
7 8
Criterion
1 2
3 4
5 6
Effect on Filtration and
Disinfection
Level of treatment /
Effluent Quality
Performance Robustness
Proven Technology
Operational Complexity
Sustainability
Market Competition
Footprint
ATTACHMENT 2
10.1.7 Evaluation of Shortlisted Alternatives
The 2007 WQCF Master Plan Update prepared by Nolte Associates Inc. recommended in-kind expansion of the existing Southside Plant facilities up to an ADWF of 17.5 Mgal/d for the Phase IV Expansion Project. The purpose of this section is to evaluate the in-kind CAS expansion versus the MBR (i.e., the two shortlisted alternatives) to determine which alternative is more appropriate, especially with the changed water quality objectives or other conditions since the last master plan update.
As described in Chapter 8, the most significant change to the water quality objectives since the last update is that an effluent limit on Nitrate + Nitrite Nitrogen for discharge to the San Joaquin River was added to the NPDES Permit. Recently completed upgrades to the secondary treatment processes and the proposed Interim Project Improvements are addressing this changed condition and can be accomplished with modifications to the existing secondary treatment facilities.
Another significant changed condition is the proposed sale of City owned property south the of main WQCF. This will limit the expansion of the Southside Plant as originally master planned. This site constraint can possibly be addressed by using a less land intensive process such as Membrane Bioreactors (MBRs).
The remainder of this section includes the following subsections:
• Project Alternatives Analysis
• Expansion with Conventional Activated Sludge
• Expansion with MBRs
• Cost Comparison of Alternatives
• Overall Alternatives Analysis
• Recommended Treatment Process Alternative
10.1.7.1 Project Alternatives Analysis
The following two shortlisted treatment alternatives were evaluated for the Phase IV Expansion Project: 1) Conventional Activated Sludge(CAS); and 2) Membrane Bioreactors (MBR).
Common Design Criteria
The secondary treatment process design criteria listed below are applicable to both expansion options.
Flows and Loads. The flows and loads to each expansion stage (the 4.65 Mgal/d) is listed in Table 10-2.
The influent flow to the secondary treatment is the same as the primary effluent of the primary sedimentation tank. It is presumed that the in-plant recycle streams are returned upstream the primary sedimentation tank. Therefore, the secondary influent will include the raw influent plus the in-plant recycle minus what is removed by the primary sedimentation tank.
ATTACHMENT 2
Table 10-2. Influent and Secondary Treatment Flows and Loads for 4.65 Mgal/d Design Expansion
Item Raw Influent Secondary Influent
Average Dry Weather Flow (ADWF), Mgal/d 4.65 5.21
Average Day Maximum Monthly Flow (ADMMF), Mgal/d 4.84 5.42 Peak Day Wet Weather Flow (PDWWF), Mgal/d 5.81 6.51
Peak Hour Wet Weather Flow (PHWWF), Mgal/d 9.77 10.94
Average Annual BOD5 Load to Secondary Process, lb/d 16,160 10,510 Peak Month BOD5 Load to Secondary Process, lb/d 19,400 12,610 Average Annual TKN Load to Secondary Process, lb/d 2,610 2,130 Peak Month TKN Load to Secondary Process, lb/d 3,130 2,550 Key:
BOD = Biochemical Oxygen Demand
lb/d = pounds per day
Mgal/d = million gallons per day
TKN = Total Kjeldahl Nitrogen
Temperature. It is important to determine the minimum sustained temperature that will exist in the activated sludge process because maximum growth rate for nitrifiers is reduced at low temperatures. The slower the growth rate of nitrifiers, the larger the reactor volume needs to be to promote successful nitrification. The maximum temperature is also important for design because microbial activities increase at high temperatures, resulting in higher rate of oxygen utilization, which impacts the sizing of the aeration equipment. Based on historical data from 2016 to 2020, the effluent temperature ranges from 18°C to 28°C
Solids Retention Time (SRT). The selection of the design solids retention time (SRT) or sludge age probably is the most important design decision because it determines the size of the secondary treatment facilities. The aerobic SRT must be sufficiently long to allow the nitrifying organisms to grow and metabolize essentially all the available ammonia-nitrogen. The anoxic SRT must be long enough for robust denitrification.
The required aerobic SRT varies with temperature, desired effluent ammonia-nitrogen concentration, dissolved oxygen (DO) concentration, and the fraction of the total reactor volume that is aerobic. As shown in Figure 10-2, the theoretical total SRT at the minimum design temperature of 18°C is 7.4 days (without a factor of safety), based on 65% of the total reactor volume being aerobic when the DO is 2 mg/L and the effluent ammonia-nitrogen concentration is 1 mg/L. To ensure reliable nitrification performance under actual field conditions, it is appropriate to apply a safety factor. A safety factor (SF) of
1.22 was selected. Accordingly, as shown in Figure 10-2, a design total SRT of 9 days is selected. The selected aerobic and anoxic SRTs were confirmed by BioWin simulation.
ATTACHMENT 2
Figure 10-2. Total SRT with and Without Factor of Safety Sludge Yield. The sludge yield was evaluated as a part of the WQCF 2021 Capacity Assessment. Actual sludge production values were comparable to MOP8 (i.e., the calculated actual sludge yield was 100% of the MOP 8 yield). Therefore, MOP8 sludge yield will be used for design.
Primary Sedimentation Basin BOD Removal Efficiency. Per the WQCF 2021 Capacity Assessment report, the average BOD removal efficiency in the primary sedimentation basin is about 35%, which is in the range of typical values.
10.1.7.2 Expansion with Conventional Activated Sludge
This alternative would include an expansion of the existing WQCF with a new reactor complex south of the Southside Plant Facilities similar to the Southside process except that the aeration basins would have larger anoxic zones for robust denitrification. The new design would have a design ADWF capacity of approximately 4.65 Mgal/d.
Process Design
The following outlines the proposed secondary treatment system process design.
Reactor Volumes. Based on a total SRT of 9 days and a minimum design temperature of 18 °C, the net sludge yield is estimated to be 0.69 lb TSS per lb BOD5 removed. The projected peak month BOD5 load (including in-plant recycles) is about 19,400 lb/d. Assuming 35% is removed in the primary sedimentation tank, the BOD load to the secondary treatment is approximately 12,4600 lb/d. The estimated sludge inventory is approximately 78,400 lbs. Assuming a MLSS concentration of 4,000 mg/L at the peak month ATTACHMENT 2
load condition, the required total reactor basin volume is approximately 2.35 million gallons (Mgal) to be split between five trains. Each basin would have an anoxic volume that is 35% of the total volume. The selected basin and zone volumes was validated through BioWin modeling.
Internal Mixed Liquor Recycle Pumps. The IMLR pumps are used to recirculate the mixed liquor from the end of the aerobic zone to the beginning of the anoxic zone where it is mixed with the secondary influent and RAS. It is recommended to install one IMLR wall pump per train. The design capacity of each wall pump should have an estimated capacity of approximately 5 Mgal/d (~500% of secondary influent flow per train.
Sludge Volume Index (SVI). The SVI was evaluated as a part of the WQCF 2021 Capacity Assessment.
The SVI data from 2019 through 2021 for the existing Northside and Southside plants were 228, and 204 ml/g, respectively. It is expected that the design of the new train with appropriate size anoxic basin volume and higher dissolved oxygen concentration in the aerobic zone will provide a better settling sludge with a lower SVI. A reasonable SVI value of 200 ml/g is used for design.
Secondary Clarifiers. Two 110 ft diameter clarifiers are adequate to pass a peak hour flow (PHF) of
10.94 Mgal/d at a MLSS concentration of 4,000 mg/L, an SVI of 200, and an underflow rate of 500 GPD per square foot of clarifier area. The secondary clarifiers would have modern features such as an energy dissipating inlet and a flocculating well. A side water depth of 16 ft and an in-board launders are appropriate for this size clarifier.
RAS & WAS Pump Station. Similar to the existing pump station, the new pump station would have three
4.75 Mgal/d pumps. It is recommended to use screw centrifugal pumps (two duty and one standby) on a concrete pad.
Process Modeling. BioWin process simulation software was used to analyze the performance of the existing secondary treatment system. Because the secondary treatment system is directly impacted by the performance of the primary treatment system and by internal plant return flows, particularly those from the solids handling system and the tertiary filtration system, the entire wastewater treatment plant was modeled and simulated in BioWin. The new reactor complex was added to the configuration of the existing plant model previously developed in BioWin. Wastewater characteristics used in the BioWin simulations were as determined from previous modeling work at the WQCF, including the diurnal flow and loading pattern, which are needed for dynamic simulations.
The model was used to simulate the whole plant (including the proposed reactor complex) under peak month design loading conditions combined with ADWF. Combining peak month loads with ADWF results in the highest influent concentrations and the need for the most nitrogen removal. The simulation was conducted under the minimum temperature of 18 °C and the design total SRT of 9 days. In the simulation of the new reactor complex, the DO concentration set point was set for 2.0 mg/L in all aerobic zones. The simulation results indicated that the target effluent total nitrogen concentration (below 10 mg/L) could be achieved, thus supporting the proposed design. The BioWin flow diagram and effluent nitrogen concentrations are shown Figure 10-3 and Figure 10-4, respectively.
ATTACHMENT 2
Figure 10-3. BioWin Flow Diagram of Conventional Activated Sludge Expansion Secondary Treatment Influent N. Grit
S. Grit
N. Zone A N. Zone B N. Zone C N. Zone D N. Zone E
S. Zone A S. Zone B S. Zone C S. Zone D S. Zone E
An. Digester
Sludge Cake
Filter Effluent
New Grit New A New B New C New D New E
ATTACHMENT 2
Figure 10-4. Dynamic Simulation Results for Effluent Nitrogen – Conventional Activated Sludge ATTACHMENT 2
10.1.7.3 Conventional Activated Sludge Design Summary for Stage 1 Expansion The following Table 10-3 is a summary the design criteria for the Conventional Activated Sludge process.
Table 10-3. Conventional Activated Sludge Process Design Item Value
Activated Sludge Design Parameters
Minimum MLSS Temperature, deg C 18
SVI 200
SRT, days 9
MLSS, mg/L 4,000
Reactor Basins
Total Volume, Mgal 2.35
Number of Trains 5
Volume (each Train), Mgal 0.47
Anoxic Zone Volume (each Train), Mgal 0.165
Aerobic Zone Volume (each Train), Mgal 0.305
Anoxic Zone Mixers
Number of Mixers (per Train) 2
Type of Mixer Submersible
Aeration System
Diffuser Type Tube Diffusers
Number of Aeration Blowers 3 (2 duty + 1 standby)
Blower Type High Speed Turbo Blowers
Blower Capacity, scfm 3,900
Blower Horsepower 250
Internal Mixed Liquor Recirculation (IMLR) Pump
Number of IMLR Pumps (per Train) 1
Pump Type Wall Pump
Capacity 5 Mgal/d
Horsepower TBD
Secondary Clarifiers
Number of Secondary Clarifiers 2
Diameter, feet 110
Side Water Depth, feet 14
Motor Horsepower 1
Return Activated Sludge (RAS) Pump
Number of RAS Pumps 3 (2 duty + 2 standby)
Pump Type Screw Centrifugal
Capacity, Mgal/d 4.75
ATTACHMENT 2
Item Value
Scum Pump
Number of Scum Pumps 2 (1 duty + 1 standby)
Pump Type Chopper
Min Duty Point 60 gpm @ 32.5 feet TDH
Max Duty Point 420 gpm @ 10 feet TDH
Horsepower 5
Key:
gpm = gallons per minute
IMLR = Internal Mixed Liquor Recycle
mg/L = milligrams per liter
Mgal = million gallons
MLSS = Mixed Liquor Suspended Solids
scfm = standard cubic feet per minute
SRT = Solid Retention Time
SVI = Sludge Volume Index
TBD = To be determined
TDH = Total Dynamic Head
Figure 10-5 shows a preliminary site layout of the Conventional Activated Sludge (Stage 1 and 2) Alternative.
ATTACHMENT 2
Figure 10-5
Preliminary Site Layout for CAS Alternative
PRIMARY
CLARIFIER, S1
AERATION
BASINS, S1
RAS PUMP
STATION, S1
SECONDARY
CLARIFIER, S2
SECONDARY
CLARIFIER, S1
SECONDARY
CLARIFIER, S1
LEGEND
Interim - 8.23 MGD
Stage 1 - 12.87 MGD
Stage 2 - 17.5 MGD
Future
INT
S2
S1
PRIMARY
CLARIFIER, S2
AERATED GRIT
TANKS, S1
AERATED GRIT
TANKS, S2
DIGESTER, S2
NEW RAS PUMPS, INT
NEW GLYCERIN SYSTEM, INT
0 80 160 240 320 400
FEET
AERATION
BASINS, S2
AERATED GRIT & PRIMARY
SEDIMENTATION BASINS
COVERS REPLACEMENT, INT
SECONDARY
CLARIFIER, S2
MUNICIPAL
UTILITIES
BUILDING, S1
NEW GATES
PARKING
AREA, S1
ROAD DEMO, S1
NEW ACCESS ROAD AT
INTERSECTION OF
W YOSEMITE &
SWANSON RD, S1
60” NORTH INFLUENT FLOW
METERING MANHOLE, S1
60” SOUTH INFLUENT FLOW
METERING MANHOLE, S1
NORTH AND SOUTH
AERATION BASIN
IMPROVEMENTS, INT
HEADWORKS, IPS,
BIOFILTER IMP., INT
REPLACE SECONDARY EFFLUENT EQUALIZATION POND LINER, INT
UV, INT
DIGESTER, S2
DIGESTER CONTROL
BUILDING, S1
DIGESTER, S1
NEW WAS
PUMPS, INT
RAS PUMP
STATION, S2
NEW CENTRIFUGE, INT
NEW CENTRIFUGE, S1
NEW CENTRIFUGE, S2
NEW SIDESTREAM
TREATMENT, INT
NEW DAFT, INT
NEW DAFT, S1
AERATED GRIT & PRIMARY
SEDIMENTATION BASINS
COVERS REPLACEMENT, INT
BIO TOWERS DEMO, S1
BIOSOLIDS DRYING
FACILITY, S1
COOLING TOWERS 1-4, S1
COOLING BASIN EFFLUENT
PUMP STATION, S1
COOLING
EFFLUENT
BASIN, S1
COOLING
TOWER 5, S2
PRIMARY
EFFLUENT PUMP
STATION, INT
COOLING BASIN
EFFLUENT PUMP 4, S2
EFFLUENT PUMP, S1
EFFLUENT PUMP, S2
CHECK VALVE, S1
INFLUENT PUMP, S2
INFLUENT PUMP, S1
INFLUENT PUMP, INT
MCC, S1
BIOSOLIDS DRYING
FACILITY, S2
FOG RECEIVING STATION
SCREENING SYSTEM, INT
BULK FERRIC CHLORIDE
SOLUTION TANKS, INT
HEADWORKS SCREEN NO.3 , INT
DIGESTERS PRESSURE RELIEF VALVES
PLATFORM & HANDRAILING, INSTALL
NEW WASTE HEAT RADIATOR,
DIGESTERS NO.1 AND NO.2
OVERFLOW BOXES, INT
ELECTRICAL
BUILDING, S2
U:\184031535\drawing\graphics\manteca_wqcf__________.ai mlm march-2023 ATTACHMENT 2
10.1.7.4 Expansion with MBR
Like conventional activated sludge, the MBR process utilizes suspended growth biological treatment.
However, in the MBR, membrane filtration (instead of clarification) is used to achieve solids-liquid separation so that the solids can be returned to the reactor basin. This method of solids-liquid separation does not depend on solids settleability and is, therefore, much more reliable than clarification.
Additionally, the MBR eliminates the need for downstream tertiary filtration and provides a superior quality effluent as compared to conventional activated sludge followed by tertiary filtration. The effluent from the MBR is easier to disinfect and requires lower ultraviolet dosing as compared to a conventional treatment system. Additionally, membrane filtration would serve as a necessary pretreatment step to possible future reverse osmosis for compliance with effluent salinity requirements (conventional treatment with tertiary filtration is not adequate).
Allowable mixed liquor suspended solids concentrations in an MBR are determined by membrane filtration characteristics, not by settling characteristics, and are much higher than those in conventional activated sludge. Typically, the biological reactors for an MBR are designed based on a MLSS concentration of 8,000 mg/L, compared to 3,000-4,000 mg/L in a conventional activated sludge system.
The higher MLSS provides the benefit of greater treatment capacity per unit volume of reactor basin. All MBR systems must be preceded by fine screening to protect the membranes from materials in the wastewater such as hair, stringy materials, paper, and small plastic objects that can pass through typical headworks screens and primary clarifiers. The topic of fine screening is considered first below, followed by detailed analysis of the MBR system.
Fine Screens. Depending on the selected membrane supplier, maximum allowable screen openings are between 1 and 3 mm. For this analysis, a 2 mm screen is assumed, which is recommended by several leading MBR manufacturers and is the most common screen size based on Stantec experience. The 2 mm screen would be used for screening primary effluent ahead of the MBR.
Primary effluent would flow by gravity from the existing primary clarifiers effluent channel through the proposed new fine screens and to the MBR system. The MBR process flow would be controlled by a modulating gate or valve ahead of the fine screens. All remaining primary effluent flow not going to the MBR treatment system would go to the existing conventional treatment trains.
For Stage 1, the MBR Screenings Facility would be equipped with two (2) in-channel 2-mm drum screens - one duty and one standby. A third screen will be provided for Stage 2. Each screen would be rated to handle a maximum flow rate of 11.0 Mgal/d. The screenings would be washed and compacted within the screen mechanism before they are discharged into a screenings bin.
For odor and vector control, the screenings bin would be covered. Odors from the influent entering the MBR Screenings Facility will not be an issue since the influent wastewater has been passed through coarse screens, grit removal, and primary clarifiers. Therefore, an odor control system at the MBR Screening Facility would not be required. The fine screen design criteria are summarized in Table 10-4.
ATTACHMENT 2
Table 10-4. Fine Screens Design Criteria
Parameter Value
Quantity 3 (2 for Stage 1
+ 1 for Stage 2)
Type Drum
Opening Size 2 mm
Capacity (Each) 11 Mgal/d
MBR Process Design
The MBR biological treatment system would be designed as an MLE process similar to the conventional activated sludge alternative. The reactor basin would include an anoxic zone followed by an aerobic zone, each subdivided into compartments in series. Membrane basins containing the membrane filtration facilities would be located downstream from the reactor aerobic zones and would comprise additional aerobic volume. Concentrated mixed liquor remaining in the membrane basins after removal of membrane effluent would be returned to the anoxic zones by RAS pumps. Because the RAS would initially have high dissolved oxygen concentrations (up to 6 mg/L) resulting from air scouring of the membranes, the RAS would be passed through a deoxygenation zone before going into the anoxic zone.
Just like the conventional MLE process, denitrification is facilitated by returning nitrates from aerobic zones (in this case from the membrane basins) to the anoxic basins in the RAS flow. The RAS flow in the MBR system would be similar to the IMLR flow plus RAS flow in the conventional system. If not reduced in the deoxygenation zone, the high dissolved oxygen concentration contained in the RAS would be utilized before nitrate in the anoxic basins for the treatment of influent carbonaceous substances, thus reducing the amount of carbonaceous substances available for denitrification and possibly resulting in the need to add glycerin that might not have otherwise been required.
For the purposes of this alternative analysis, the membrane basins considered in this analysis were as sized by Veolia. Additional MBR manufacturers can be considered during detail design, as appropriate.
Because MBR systems by different manufacturers can require substantially different detailed designs, an evaluated bid pre-selection process would be recommended before selecting a final MBR system.
A key feature of the membrane filtration system design proposed by Veolia and used as the basis of this analysis is the level of redundancy to be provided. The proposed design is based on “N-1” redundancy, meaning that the membrane filtration system would be able to operate at peak day flow conditions for up to 7 days with one membrane basin out of service. For the Phase IV Stage 1 Expansion (two 4.65 Mgal/d MBR treatment trains), a total of four membrane basins would be provided and operation with only three membrane basins would be possible for up to 7 days. An additional two trains and four membrane basins will be added for Stage 2.
One RAS pump and one permeate pump is needed to be operational for each operational membrane basin. For this analysis, it is assumed that the number of RAS and permeate pumps would equal the number of membrane basins. Therefore, the loss of a RAS pump or a permeate pump would result in the need to take the connected membrane basin out of service.
ATTACHMENT 2
MBR Modeling Overview. As was done for the conventional process analysis and for the same reasons, the new MBR was added to the configuration of the existing plant. The whole plant (including the new MBR) was simulated under the same conditions of the conventional activated sludge alternative (i.e., peak month load combined with ADWF, under the minimum temperature of 18 °C, at a total SRT of 9 days). The simulation results indicated that the target effluent nitrate plus nitrite concentration (below 10 mg/L) could be achieved, thus supporting the proposed design. The BioWin flow diagram and effluent nitrogen concentrations are shown Figure 10-6 and Figure 10-7, respectively.
ATTACHMENT 2
Figure 10-6. MBR Process Flow Diagram
Influent N. Grit
S. Grit
N. Zone A N. Zone B N. Zone C N. Zone D N. Zone E
S. Zone A S. Zone B S. Zone C S. Zone D S. Zone E
An. Digester
Sludge Cake
Filter Effluent
New Grit New A New B New C New D New E Bioreactor - MBR119 Deox
ATTACHMENT 2
Figure 10-7. Dynamic Simulation Results for Effluent Nitrogen – MBR ATTACHMENT 2
10.1.7.5 Design Criteria for New MBR Process
Design criteria for the new MBR process are provided in Table 10-5. Figure 10-8 shows a preliminary site layout of the MBR Process (Stage 1 and 2) Alternative.
Table 10-5. MBR Design Criteria for Stage 1 Expansion
Parameter Total Per Train Notes
Influent Flows
Average Dry Weather Flow (ADWF), Mgal/d 4.65 2.33
Peak Month Flow (PMF), Mgal/d 4.84 2.42
Peak Day Flow (PDF), Mgal/d 5.81 2.91
Peak Hour Flow (PHF), Mgal/d 9.77 4.88
MBR Flows and Loads
Average Dry Weather Flow (ADWF), Mgal/d 5.21 2.60 1
Peak Month Flow (PMF), Mgal/d 5.42 2.71 1
Peak Day Flow (PDF), Mgal/d 6.51 3.26 1
Peak Hour Flow (PHF), Mgal/d 10.94 5.47 1
Average Annual BOD5 Load to Secondary Process, lb/d 10,510 5,255 2 Peak Month BOD5 Load to Secondary Process, lb/d 12,610 6,305 2 Other Design Parameters
Minimum Monthly Temperature, ºC 18 18
Aerobic SRT, days 5.8 5.8
Reactor Basin Mixed Liquor Suspended Solids at Max Month Load, mg/L 8,000 8,000 Membrane Basin Mixed Liquor Suspended Solids at Max Month Load, mg/L 10,000 10,000 Membrane Bioreactor
Total Volume of Basin, Mgal 1.23 0.615
Reactor Anoxic Volume, Mgal 0.45 0.225
Reactor Aerobic Volume, Mgal 0.49 0.245
Deoxygenation Zone Volume, Mgal 0.15 0.075
Number of Membrane Basins 4 2
Membrane Basin Volume, Mgal 0.0844 0.0422
Number of Air Scour Blowers 4 2
Number of RAS Pumps 4 2
Maximum RAS Flow per Pump, Mgal/d 10.4 10.4 3
Number of Permeate Pumps 4 2
Permeate Pump Flow, Mgal/d 4 4 4
Notes:
1 Includes 12% allowance for in-plant recycle flows. 2 Assumed 35% BOD removal in primary clarifiers. 3 Total Flow of 3 RAS Pumps (one out of service) = 6 times ADWF. 4 Total Flow of 3 permeate pumps (one out of service) = 1.1 times PHF.
ATTACHMENT 2
HEADWORKS, IPS, BIOFILTER
IMPROVEMENTS, INT
REPLACE SECONDARY EFFLUENT EQUALIZATION POND LINER, INT
AERATION
BASINS, S1
UV, INT
DIGESTER, S2
DIGESTER CONTROL
BUILDING, S1
DIGESTER, S1
NEW WAS
PUMPS, INT
NEW CENTRIFUGE, INT
NEW CENTRIFUGE, S1
NEW CENTRIFUGE, S2
NEW SIDESTREAM
TREATMENT, INT
NEW DAFT, INT
NEW DAFT, S1
NEW RAS PUMPS, INT
AERATED GRIT & PRIMARY
SEDIMENTATION BASINS
COVERS REPLACEMENT, INT
AERATED GRIT & PRIMARY
SEDIMENTATION BASINS
COVERS REPLACEMENT, INT
0 80 160 240 320 400
FEET
NORTH AND SOUTH
AERATION BASIN
IMPROVEMENTS, INT
BIO TOWERS DEMO, S1
ROAD DEMO, S1
MBR, S1
MBR, S2
PSB, S1
PSB, S2
AERATED GRIT
TANKS, S1
BIOSOLIDS DRYING
FACILITY, S1
SPLITTER STRUCTURE, S1
FINE SCREENS, S2
FINE SCREENS, S1
BLOWER AND
EQUIPMENT
BUILDING, S1
BLOWER AND
EQUIPMENT
BUILDING, S2
AERATED GRIT
TANKS, S2
COOLING TOWERS 1-4, S1
COOLING BASIN EFFLUENT
PUMP STATION, S1
COOLING
EFFLUENT
BASIN, S1
COOLING
TOWER 5, S2
PRIMARY
EFFLUENT PUMP
STATION, INT
COOLING BASIN
EFFLUENT PUMP 4, S2
EFFLUENT PUMP, S1
EFFLUENT PUMP, S2
CHECK VALVE, S1
INFLUENT PUMP, S2
INFLUENT PUMP, S1
INFLUENT PUMP, INT
MCC, S1
MUNICIPAL
UTILITIES
BUILDING, S1
LEGEND
Interim - 8.23 MGD
Stage 1 - 12.87 MGD
Stage 2 - 17.5 MGD
INT
S2
S1
NEW GATES
NEW ACCESS ROAD AT
INTERSECTION OF
W YOSEMITE &
SWANSON RD, S1
60” NORTH INFLUENT FLOW
METERING MANHOLE, S1
PARKING
AREA, S1
BIOSOLIDS DRYING
FACILITY, S2
60” SOUTH INFLUENT FLOW
METERING MANHOLE, S1
Figure 10-8
Preliminary Site Layout for MBR Alternative
FOG RECEIVING STATION
SCREENING SYSTEM, INT
BULK FERRIC CHLORIDE
SOLUTION TANKS, INT
HEADWORKS SCREEN NO.3 , INT
DIGESTERS PRESSURE RELIEF VALVES
PLATFORM & HANDRAILING, INSTALL
NEW WASTE HEAT RADIATOR,
DIGESTERS NO.1 AND NO.2
OVERFLOW BOXES, INT
U:\184031535\drawing\graphics\manteca_wqcf__________.ai mlm march-2023 ATTACHMENT 2
10.1.7.6 Cost Comparison of Alternatives
Both the conventional activated sludge and the MBR processes have been analyzed as described in the previous subsections. In this section, cost and other factors relevant to a selection between these alternatives are presented.
Cost Comparison
In comparing costs for the two alternatives, it is important to consider not only the costs for the secondary treatment facilities, but also the costs for other plant facilities affected by the choice of secondary treatment system. In particular, it is noted that the MBR effluent is easier to disinfect and would normally require a less expensive UV disinfection system. It is also noted that the existing downstream tertiary filters have enough capacity for Stage 1 expansion but not for Stage 2. Therefore, tertiary filters for the conventional activated sludge alternative would only be required for Stage 2.
A summary of the facilities requirements and costs for Stage 1 (expansion to 12.87 Mgal/d ADWF) and Stage 2 (Expansion to 17.5 Mgal/d ADWF) for both alternatives is shown in Table 10-6. It would be possible to construct both stages at the same time, in which case the costs would be additive. All costs are engineering opinions of probable costs using an Engineering News Record Construction Cost Index (ENRCCI) of 13,176. This cost estimate would have to be adjusted as appropriate to get costs at the actual times of construction.
Table 10-6 shows capital costs, comparative annual costs (annual costs that would be different between the alternatives), and present worth costs. For the purpose of calculating present worth costs for Stage 2, it was presumed that Stage 2 would be constructed 15 years after Stage 1.
As indicated in the table, the capital cost and the total present worth of the MBR are slightly lower than that for the conventional activated sludge alternative in Stage 2 and in combined Stages 1 and 2.
ATTACHMENT 2
Table 10-6. Facilities Descriptions and Costs
Item Stage 1 (12.9 Mgal/d) Stage 2 (17.5 Mgal/d) Total Both Phases Conv MBR Conv MBR Conv MBR
Facilities Description
Fine Screen Added None 2 @ 11 Mgd None 1 @ 11 Mgd
Reactor Splitter Features None Yes None Yes
Anoxic Basin Volume, Mgal 0.82 0.45 0.82 0.45
Aerobic Basin Volume, Mgal 1.53 0.49 1.53 0.49
Number of Membrane Basins 0 6 0 6
Total Membrane Basin Volume, Mgal 0 0.15 0 0.15
Deox Basin Volume, Mgal 0 0.14 0 0.14
Membrane Removal Bridge Crane None Yes None Extend
Blower Building Yes Yes No No
Membrane Blower, Chemical, and Controls Bldg None Yes None Extend Number of Secondary Clarifiers 2 0 2 0
Secondary Clarifier Diameter, ft 110 NA 110 NA
RAS Pump Station Added Yes In MBR Add Pump In MBR
Tertiary Disc Filters Added No None Yes None
UV Added Yes None No None
Capital Costs 1
Fine Screen System 0 1,868,000 0 600,000 0 2,468,000
Reactor Splitter Box or Other Splitter Features 0 312,000 0 42,000 0 354,000 Reactor Basin with Equipment (Includes MBR Deox) 6,438,000 3,408,000 6,438,000 3,408,000 12,876,000 6,816,000 Membrane Pump Gallery Structure 0 649,000 0 649,000 0 1,298,000 Membrane Equipment Package 0 4,000,000 0 4,000,000 0 8,000,000 Mem Equip Tax + Install (35%) 0 1,200,000 0 1,200,000 0 2,400,000 Membrane System Internal Piping 0 681,000 0 681,000 0 1,362,000 Blower and Equipment Building 1,000,000 1,252,000 1,000,000 1,252,000 2,000,000 2,504,000 MBR Bridge Crane System 0 328,000 0 328,000 0 656,000
Secondary Clarifier 5,729,000 0 5,729,000 0 11,458,000 0 ATTACHMENT 2
Item Stage 1 (12.9 Mgal/d) Stage 2 (17.5 Mgal/d) Total Both Phases Conv MBR Conv MBR Conv MBR
RAS Pump Station 1,146,000 0 1,146,000 0 2,292,000 0
Tertiary Disc Filters 0 0 1,719,000 0 1,719,000 0
UV Disinfection 5,878,000 5,156,000 0 0 5,878,000 5,156,000 Subtotal 1 14,313,000 13,698,000 16,032,000 12,160,000 30,345,000 25,858,000 Mob/Demob, Site Work, Site Piping, Elect, etc. (50%) 7,160,000 6,850,000 8,020,000 6,080,000 15,180,000 12,930,000 Subtotal 2 21,473,000 20,548,000 24,052,000 18,240,000 45,525,000 38,788,000 Contingencies @ 30% 6,440,000 6,160,000 7,220,000 5,470,000 13,660,000 11,630,000 Subtotal 3 (Construction Cost) 27,913,000 26,708,000 31,272,000 23,710,000 59,185,000 50,418,000 Engineering, CM, and Admin @ 35% 9,770,000 9,350,000 10,950,000 8,300,000 20,720,000 17,650,000 Total Capital Cost 37,683,000 36,058,000 42,222,000 32,010,000 79,905,000 68,068,000 Present Worth of Capital Cost 2 37,683,000 36,058,000 31,417,133 23,818,446 69,100,133 59,876,446 Comparative Annual Costs (Where Different) 1, 3
Anoxic and Deox Mixer Power 20,203 14,536 20,203 14,536 40,406 29,072 Aerobic Basin Aeration Power 125,159 141,912 125,159 141,912 250,317 283,824 Permeate Pump Power 0 18,834 0 14,126 0 32,960
Membrane Air Scour Power 0 35,369 0 26,526 0 61,895
Membrane Clean Chemicals 0 4,000 0 3,000 0 7,000
Membrane Replacement Fund 0 92,000 0 69,000 0 161,000
Total 145,361 306,651 145,361 269,100 290,723 575,751
Present Worth of Comparative Annual Costs 4 2,162,608 4,562,187 427,295 791,030 2,589,904 5,353,217 Total Present Worth Cost 39,846,000 40,620,000 31,844,000 24,609,000 71,690,000 65,229,000 Notes:
1 All costs are in dollars at March‐2023 cost level, ENR CCI = 13,176 2 Present worth for Phase 1 same as base estimate.
Present worth for Phase 2 assumes Phase 2 constructed 10 years after Phase 1. Present worth factor (10 yrs at 3%) = 0.7441 3 Not all annual costs shown. Comparative annual costs include costs that are different between alternatives. Assumed power cost is $0.15/kWh 4 Present worth of Phase 1 annual costs based on 20 years at 3%, Present Worth Factor = 14.8775 Present worth of Phase 2 annual costs based on years 17 through 20 at 3%, net Present Worth Factor = 2.9395 ATTACHMENT 2
10.1.7.7 Overall Alternative Analysis
In addition to costs, other factors are also important in the evaluation of the alternatives. In this subsection, the two alternatives are rated with respect to several key economic and non-economic criteria, each of which has been assigned an importance weighting factor. The criteria and the weighting factors were developed with the input and review of Manteca staff in an effort to assure that they appropriately reflect the interests and concerns of the City. The criteria, weighting factors, and ratings are shown in Table 10-7 and discussed briefly below.
Costs. Three different cost criteria are included in Table 10-7. The Stage 1 capital cost is considered most important and is assigned a weighting factor of 20%, while the future expansion cost, which might occur 17 years after Stage 1 is less important with a weighting factor of 10%. The comparative annual cost was assigned a weighting factor of 5% in recognition of the fact that these costs are much less important than the capital costs in the overall present worth cost calculation.
Adaptability to Future Permit Requirements. If more stringent salinity limits are enforced in the future, reverse osmosis (RO) will be required and the MBR would provide the pretreatment step necessary for RO. Therefore, the MBR is considered to be more adaptable to future permit requirements. This criterion was assigned a weighting factor of 20% of the total ranking score.
Plant Footprint. The MBR alternative would have the smallest footprint. This was assigned a weighting factor of 10%.
Robustness and Reliability. Robustness and reliability represent the degree to which the process is resilient and can perform consistently well, even in problematic conditions, such as influent flow or load spikes, extreme weather, or other challenging biological process conditions. Because the membranes provide an absolute barrier to the escape of particulate matter from the biological treatment system, very consistent performance can be assured. With a biological treatment system that relies on sludge settling in a clarifier, such as conventional activated sludge, there can be much more variability in effluent quality, which would lead to a higher probability (although still low if properly designed and operated) of potential permit violations. This factor was assigned a weighting factor of 20%.
Ease of Operation. This criterion was given a weighting factor of 15%. There are many considerations that go into ease of operation. The MBR has the benefit of being highly automated and requiring minimal routine operator activity. Sludge settleability monitoring, clarifier sludge blanket monitoring, and adjustments to RAS rates to control the sludge blanket are not required in the MBR. However, an MBR system added in parallel with conventional treatment trains results in operation of two types of processes simultaneously, which is a complication. Considering all factors, the score assigned for the MBR would be less than the conventional activated sludge.
ATTACHMENT 2
Table 10-7. Alternatives Rating and Ranking
Criterion Weighting
Factor %
Alternatives Ratings 1
Alternative 1
CAS
Alternative 2
MBR
Phase 1 Capital Cost 20 10 9
Phase 2 Capital Cost 10 9 10
Annual Operating Cost 5 10 6
Adaptability to Future Permit Requirements 20 8 10
Footprint 10 8 10
Robustness and Reliability 20 8 10
Ease of Operation 15 10 7
Overall Weighted Score 2 100 8.90 9.15
Rank 3 2 1
Notes:
1 The highest rated alternative is assigned 10. Other alternatives are scored lower, according to the relative concerns. 2 Summation of individual ratings multiplied by the corresponding weighting factors. 3 The alternative with the highest score is ranked “1.” Other alternatives are ranked according to their score.
10.1.7.8 Recommended Treatment Process Alternative
Based on the rankings shown in Table 10-7, the recommended alternative for WQCF Phase IV Expansion based on the detailed evaluation is Alternative 2 – MBR. While the MBR has a higher operating cost than conventional activated sludge, it has slightly lower capital costs, a smaller footprint and is more adaptable to future regulations.
10.2 RECOMMENDED PHASE IV EXPANSION PROJECT
A site plan showing the proposed new facilities for the Phase IV Expansion Project are shown on the MBR Process Alternative Figure 10-8. The overall hydraulic and organic loading design criteria for the recommended two expansion stages are shown in Table 10-8. Individual unit processes and design criteria are discussed in the following subsections.
ATTACHMENT 2
Table 10-8. Overall Loading Design Criteria for Phase IV Project Expansion Parameter 1 Stage 1
14.44 Mgal/d 2, 3
Stage 2
19.6 Mgal/d 2, 3
ADWF (with Recycle) 14.44 19.6
ADWF (without Recycle) 12.89 17.5
Flow Ratios
ADMMF/ADWF 1.04 1.04
PDF/ADWF 1.25 1.25
PHF/ADWF 2.10 2.10
Load Ratios
ADMML/AAL 1.20 1.20
PDL/AAL 2.00 2.00
Flow, Mgal/d
ADWF 14.44 19.6
ADMMF 15.02 20.38
PDF 18.05 24.50
PHF 30.32 41.16
Annual Average Load, lb/d
BOD 44,800 60,809
TSS 33,601 45,608
TKN 7,226 9,808
Average Day Maximum Monthly Load, lb/d
BOD 53,761 72,971
TSS 40,321 54,729
TKN 8,671 11,770
Average Constituent Concentrations, mg/L
BOD 372 372
TSS 279 279
TKN 60 60
Constituent Concentrations with ADMMF and ADMML, mg/L
BOD 429 429
TSS 322 322
TKN 69 69
Constituent Concentrations with ADWF and ADMML,
mg/L
BOD 446 446
TSS 335 335
TKN 72 72
Notes:
1 ADWF = Average Dry Weather Flow, ADMMF = Average Day Maximum Monthly Flow, PDF = Peak Day Flow, PHF = Peak Hour Flow, AAL = Annual Average Load, ADMML = Average Day Maximum Monthly Load, PDL = Peak Day Load 2 All flows and loads include in‐plant recycle streams. Future projections assume recycle flow and load fractions remain unchanged. 3
The Future condition is based on likely achievable plant capacity with improvements as discussed in Section 9-3. Flow and load peaking factors assumed same as existing.
Key:
mg/L = milligrams per liter
Mgal/d = million gallons per day
ATTACHMENT 2
10.2.1 Headworks and Influent Pump Station
10.2.1.1 Influent Flow Meters
As discussed in Chapter 8, the flow meter that is used to measure the WQCF influent flow is located downstream from the return of in-plant recycle streams. The flows thus measured are reported as the plant influent flows, but they do not represent the true influent flows, which would exclude in-plant recycle streams. Therefore, it is recommended to install new flow meters upstream of the recycle streams to measure the true influent flows (one on both the north trunk and south trunk of the sanitary sewers entering the WQCF).
10.2.1.2 IPS Pumps
The existing IPS includes three duty pumps and one standby pump. The three duty pumps include two 100-hp screw centrifugal pumps which deliver screened wastewater to the Northside Plant and one 200- hp pump that delivers screened wastewater to the Southside Plant. Through the operation of valves, the standby 200-hp pump can discharge to either the Northside or Southside Plants. Space is provided in the Influent Pump Station to install four additional pumps to handle projected future flows. In addition to the pump recommended to be installed during the Interim Improvement Projects, the Phase IV Expansion project will require one new IPS pump for Stage 1 and an additional IPS pump for Stage 2 (for a total of seven IPS pumps for Stage 2, including the two dedicated Northside Plant pumps). The number of required IPS pumps is based on the current design capacity of the existing Southside Plant pumps of 10 Mgal/d. The revised capacity of these 200-hp pumps following the installation of additional pumps should be determined during preliminary design. At the Stage 2 peak flow of 32.59 Mgal/d, the velocity in the 30- inch force main would be 10.3 fps, which will incur significant headloss. Therefore, for the Stage 2 expansion, it is recommended to also install a parallel 30-inch force main to the Southside Plant. Design criteria for the existing and future pumps required for the Phase IV Expansion is presented in Table 10-9.
Table 10-9. Design Criteria for Influent Pumps for the Phase IV Expansion Project Parameter
Existing
Northside
Facility
Existing
Southside
Facility
(Interim
Project)
Stage 1
Expansion of
IPS at
Southside
Stage 2
Expansion of
IPS at
Southside
Flows
Average Flow1, Mgal/d 4.08 5.15 10.36 15.52
Peak Flow1, Mgal/d 8.57 10.82 21.76 32.59
Pumps
Number of Pumps 2 3 2,3 4 2,3 5 2,3
Number of Duty Pumps 2 2 3 3 3 4 3
Pump Horsepower 100 200 200 200
Pump Capacity, Mgal/d @ ft TDH (each) 5 @ 54 10 @ 73 4 10 @ 73 4 10 @ 73 4 Force main
Number of Force mains 1 1 1 2
ATTACHMENT 2
Parameter
Existing
Northside
Facility
Existing
Southside
Facility
(Interim
Project)
Stage 1
Expansion of
IPS at
Southside
Stage 2
Expansion of
IPS at
Southside
Force main Diameter, inch 30 30 30 30
Notes:
1 Includes 12% in-plant recycle flow. 2
Includes one 200-hp standby pump that can convey screened wastewater to either the Northside Plant or Southside Plant. 3 Includes the fifth IPS pump that is recommended to be installed during the Interim Improvements Project. 4 The noted capacity of the 200-hp pumps is the current design capacity of the pumps. The revised capacity of these pumps following the installation of additional pumps should be determined during preliminary design.
Key:
TDH = total dynamic head
10.2.2 Aerated Grit Tanks
The Phase IV Expansion Project will require 2 new Aerated Grit Tanks for Stage 1 and additional 2 tanks for Stage 2. The proposed grit tanks for the Phase IV Expansion Project are designed with a minimum of 4-minute detention time at the peak flow as summarized in Table 10-10.
Table 10-10. Design Criteria for Aerated Grit Tanks for Phase IV Expansion Project Parameter
Existing
Northside
Facility
Existing
Southside
Facility
Stage 1
Expansion of
Grit Removal
and Primary
Clarifiers at
Southside
Stage 2
Expansion of
Grit Removal
and Primary
Clarifiers at
Southside
Average Flow, 1 Mgal/d 4.08 5.15 10.36 15.52
Peak Flow, Mgal/d 8.57 10.82 21.76 32.59
Number of Grit Tanks 2 2 4 6
Tank Length, ft 24 24 24 24
Tank Width, ft 8 8 8 8
Tank Water Depth (Nominal), ft 10.75 10.5 10.5 10.5
Tank Volume, gal 15,437 15,080 15,080 15,080
Detention Time at Average Flow, min
All Units in Service 10.9 8.4 8.4 8.4
One Unit out of Service 5.4 4.2 6.3 7.0
Detention Time at Peak Flow, min
All Units in Service 5.2 4.0 4.0 4.0
One Unit out of Service 2.6 2.0 3.0 3.3
Note:
1 Includes 12% in-plant recycle flow
The 3:1 length to width ratio of the grit tanks (24 ft long x 8 ft x 10.5 ft deep) along with the placement of coarse bubble aerators along one side of the tank creates a spiral flow pattern resulting in the separation of the heavy grit particles from the wastewater. Recommended aeration rates in aerated grit tanks range ATTACHMENT 2
from 3 to 8 cfm/ft of length. A total airflow of 720 cfm to the grit tanks is recommended to supply an aeration rate of 5 cfm/ft.
Once separated from the wastewater, grit will settle into the hoppers in the bottom of the tanks. Grit collected in the hoppers will be discharged to a grit classifier by gravity for further concentration and washing of light organic material trapped with the grit. Concentrated and washed grit discharged from the classifier will be conveyed into a dumpster and periodically hauled to the landfill for disposal. Wash water from the classifier will be discharged into the plant drain system and returned to the IPS.
10.2.3 Primary Sedimentation Basins
The Phase IV Expansion Project will require 2 new Primary Sedimentation Basins for Stage 1 and additional 2 for Stage 2. It is expected that the four additional primary sedimentation tanks will be constructed at the Southside Plant. The design of primary sedimentation basins (PSBs) is based on overflow rates and to a lesser extent on detention time. Typical overflow rates range from 800 to 1,200 gpd/ft2 under average flows to 2,000 to 3,000 gpd/ft
2 under peak flow conditions. Detention times for
PSBs are 1.5 to 2.5 hours. Overflow rates and detention times for the PSBs are presented in Table 10-11. To mitigate potential odors, the PSBs will be covered, with foul air routed to the biofilter.
Table 10-11. Primary Sedimentation Basins Design Criteria for Phase IV Expansion Project
Parameter Existing
Northside Facility
Existing
Southside
Facility
Stage 1
Expansion of
Grit Primary
Clarifiers at
Southside
Stage 2
Expansion of
Primary
Clarifiers at
Southside
Average Flow,1 Mgal/d 4.08 5.15 10.36 15.52
Peak Flow, Mgal/d 8.57 10.82 21.76 32.59
Basin Length, ft 130 110 110 110
Basin Width, ft 20 20 20 20
Side Water Depth, ft 12 12 12 12
Surface Area, ft 2600 2200 2200 2200
Average Flow
Units in Operation 3 3 5 7
Overflow Rate, gpd/ft2 520 780 940 1010
HRT, hours 4.1 2.8 2.3 2.1
Units in Operation 2 2 4 6
Overflow Rate, gpd/ft2 785 1170 1177 1176
HRT, hours 2.7 1.8 1.8 1.8
Peak Flow
Units in Operation 3 3 5 7
Overflow Rate, gpd/ft2 110 1640 1980 2120
HRT, hours 2.0 1.3 1.1 1.0
ATTACHMENT 2
Parameter Existing
Northside Facility
Existing
Southside
Facility
Stage 1
Expansion of
Grit Primary
Clarifiers at
Southside
Stage 2
Expansion of
Primary
Clarifiers at
Southside
Units in Operation 2 2 4 6
Overflow Rate, gpd/ft2 1648 2458 2472 2469
HRT, hours 1.3 0.9 0.9 0.9
Note:
1 Includes 12% in-plant recycle flow
Key:
HRT = hydraulic retention time
Mgal/d = million gallons per day
gpd/ft2 = gallons per day per square foot
10.2.4 Existing Secondary Treatment Process Improvements
10.2.4.1 Provide Larger Anoxic Zones Existing Southside Plant Aeration Basins The Southside Plant is reaching its design capacity. The anoxic zone (zone A) is too small to achieve the required denitrification. If Zone B, originally designed as aerobic zone, is converted into an anoxic zone, the total aerobic zone will be too small to provide adequate nitrification. Currently, the plant is operating such that zone B at high and low dissolved oxygen set points encourages simultaneous nitrification and denitrification in the same zone. This mode of operation is challenging because it requires frequent adjustments to DO set points and cycle time. It is recommended to convert zone B to an anoxic zone and to increase the aerobic volume by extending the Southside aeration basins to the west about 20 ft as shown on Figure 10-9 and Figure 10-10, respectively.
ATTACHMENT 2
SEE NOTE 1
A
FIG 10-10
A
FIG 10-10
48” ML
ZONE A
ANOXIC
ZONE B
ANOXIC,
PREVIOUSLY
AEROBIC
ZONE C
AEROBIC
NEW
20’
EXISTING
ZONE D
AEROBIC
ZONE E
AEROBIC
NEW
ZONE F
AEROBIC
0 5 10 15 20 25
APPROXIMATE SCALE IN FEET
NEW OUTLET BOX
NEW EFFLUENT
CHANNEL
MIXING PUMPS
AND PIPING
EXTENDED TO
ZONE F (TYP)
LEGEND
AEROBIC BASIN
ANOXIC BASIN
MIXED LIQUOR (ML)
PRIMARY EFFLUENT (PE)
RETURN ACTIVATED SLUDGE (RAS)
AERATION AIR (AA,A)
RECYCLED WATER (3W,W)
POTABLE WATER (1W)
SAMPLE (SAMP)
STRUCTURE
NOTES
DIFFUSER PANELS SHOWN IN AERATION BASIN No.6 FOR
CLARITY. DIFFUSER PANEL LAYOUT IS THE SAME FOR
AERATION BASINS No. 7-10.
1. NEW EXISTING
Figure 10-9
WQCF Southside Aeration Basins Expansion Plan View
ATTACHMENT 2
REDUCED RECORD SET
NOT TO SCALE
(E) MIXING PUMP 12” ML
0 2 4 6 8 10
APPROXIMATE SCALE IN FEET
48” ML
EL 35.25
EL 35.00
EL 31.00
NEW
20’
EXISTING
ZONE E
AEROBIC
NEW
ZONE F
AEROBIC
NEW OUTLET BOX
(SHOWN OUT OF SECTION)
NEW EFFLUENT
CHANNEL
DEMO EXISTING
EFFLUENT CHANNEL
A
FIG 10-9
SECTION
MIXING PUMPS
AND PIPING
EXTENDED TO
ZONE F (TYP)
LEGEND
MIXED LIQUOR (ML)
STRUCTURE
NEW EXISTING
Figure 10-10
WQCF Southside Aeration Basins Expansion Section View
ATTACHMENT 2
10.2.5 New Membrane Bioreactors (MBR)
The proposed MBR for the Phase IV Expansion Project is shown on Figure 10-11. As noted previously, the MBR alternative developed for this investigation is based two 4.65 Mgal/d stages. Each 4.65 Mgal/d expansion stage will consist of two biological trains and four membrane tanks. Membrane sizes and costs are based on a preliminary proposal by Veolia. To allow competitive bidding by multiple MBR manufacturers, an evaluated bid pre-selection process is recommended before selecting a final MBR system which would be used to develop detailed construction drawings and specifications for the overall construction of the wastewater treatment plant expansion.
ATTACHMENT 2
18'-8"
30'-0"
20'-0" 20'-0" 35'-0" 5' 45'-6" 41'-9"
40'-0"
AEROBIC
RAS
DEOXYGENATED RAS
AEROBIC
ANOXIC
ANOXIC
DEOX.
DEOX.
MEMBRANE BASIN 1
RAS PUMP
AREA
(5’ DEEP ±)
PERMEATE
PUMP AREA
(SLAB ON
GRADE)
MEMBRANE BASIN 2
MEMBRANE BASIN 3
MEMBRANE BASIN 4
DISTRIBUTION CHANNEL DISTRIBUTION CHANNEL
PERMEATE
(TO UV)
FINE SCREENED
PRIMARY EFFLUENT
FUTURE 4.65 MGD EXPANSION
TO REACH 17.5 MGD
ML
ML
Figure 10-11
Proposed MBR for Phase IV Expansion Project
U:\184031535\drawing\graphics\manteca_wqcf__________.ai mlm march-2023 ATTACHMENT 2
10.2.6 Biosolids Handling Facilities
10.2.6.1 Waste Activated Sludge Thickening
Sludge thickening facilities are currently comprised of two DAFTs and a third DAFT is recommended to be installed during the Interim Improvement Projects. The DAFT units were designed to thicken WAS to an approximate concentration of 3%, without using polymer, and 5% with polymer, and capture 85 to 95% of the input solids. Polymer is currently used at the DAFTs. The Phase IV Expansion Project will require one new DAFT for the Stage 1 project in order to meet the estimated peak month flow (no additional DAFTs are needed for the Stage 2 project). The fourth DAFT is proposed to match the existing DAFTs.
Design criteria for the existing and future DAFTs required for the Phase IV Expansion is presented in Table 10-12.
Table 10-12. Design Criteria for DAFTs for the Phase IV Expansion Project Parameter
Existing
Facility
(Interim
Project)
Stage 1
Expansion of
DAFT
Stage 2
Expansion of
DAFT
Number of DAFTs 1 3 4 4
Flows
Average Solids Flow, dry lb/d 2 14,432 20,343 27,358
Peak Month Solids Flow, dry lb/d 2 17,114 24,340 32,785 Capacity
DAFT Unit Capacity, dry lb/hr (each) 184-459 184-459 184-459 Maximum Capacity with One Unit Out of Service, dry lb/d 22,032 33,048 33,048 Dimensions
Tank Length, ft 38.25 38.25 38.25
Tank Width, ft 12 12 12
Tank Height, ft 9 9 9
Notes:
1 Includes one standby DAFT. Also includes the third DAFT that is recommended to be installed during the Interim Improvements Project. 2 Includes impacts from food waste (approximately 10.4 – 11.0 dry lb/d of food waste from the recycle stream).
Key:
DAFT = dissolved air floatation thickener
10.2.6.2 Sludge Dewatering
Sludge dewatering facilities are currently comprised of two small centrifuges. A third larger centrifuge is recommended to be installed during the Interim Improvement Projects. The existing small centrifuges each have a rated capacity of 185 gpm and 1,540 dry lb/hr. However, the main treatment process is currently overloaded on nitrogen treatment capacity. As a result of this, only one centrifuge can be run at a time with a flow limit of 115 gpm. A liquid flow limit of 150 gpm per existing centrifuge was used in the analysis for determining dewatering needs for the Phase IV Expansion Project (assuming sidestream treatment would allow the centrifuges to be run at a higher flow than is currently possible). The new larger centrifuge is recommended to have a minimum capacity of 260 gpm and 3,000 dry lb/hr. Since the ATTACHMENT 2
existing Dewatering Building only has space for three centrifuges, the Phase IV Expansion Project will require replacement of the existing two small centrifuges with larger centrifuges to avoid having to expand the Dewatering Building, as shown on Figure 10-12 (one centrifuge will be replaced for Stage 1 and the second existing centrifuge will be replaced for Stage 2). For Stage 1, the new large replacement centrifuge and the existing small centrifuge (1 standby large centrifuge) will require approximately 49 hours of operation per week (approximately 7 hours per day, 7 days a week) during maximum month conditions (assuming the existing small centrifuge has a capacity of 150 gpm and 1,540 dry lb/hr and the new large centrifuge has a capacity of 260 gpm and 3,000 dry lb/hr). For Stage 2, it is recommended to replace the second existing small centrifuge in order to have three large centrifuges (two duty plus one standby), which will also require approximately 49 hours of operation per week (approximately 7 hours per day, 7 days a week) during Stage 2 maximum month conditions (assuming all centrifuges will have a capacity of 260 gpm and 3,000 dry lb/hr). Design criteria for the existing and future centrifuges required for the Phase IV Expansion is presented in Table 10-13.
Table 10-13. Design Criteria for Centrifuges for the Phase IV Expansion Project Parameter
Existing
Facility
(Interim
Project)
Stage 1
Expansion
of
Centrifuges
Stage 2
Expansion
of
Centrifuges
Number of Centrifuges 1 3 3 3
Number of Small Centrifuges 2 1 0
Small Centrifuge Max Liquid Flow Capacity, gpm (each) 2 150 150 150 Small Centrifuge Max Solids Flow Capacity, dry lb/hr (each) 1,540 1,540 1,540 Number of Large Centrifuges 1 1 2 3
Large Centrifuge Max Liquid Flow Capacity, gpm (each) 3 260 260 260 Large Centrifuge Max Solids Flow Capacity, dry lb/hr (each) 3 3,000 3,000 3,000 Liquid Flows & Capacity
Average Liquid Flow, gal/wk 4 654,437 956,431 1,272,012 Peak Month Liquid Flow, gal/wk 4 767,249 1,129,583 1,507,093 Liquid Flow Capacity with a Large Unit Out of Service, gal/wk 2,5 882,000 1,205,400 1,528,800 Solids Flows & Capacity
Average Solids Flow, dry lb/wk 6 128,352 184,198 243,908 Peak Month Solids Flow, dry lb/wk 6 149,982 217,196 288,708 Solids Flow Capacity with a Large Unit Out of Service, dry lb/wk 5 150,920 222,460 294,000 Notes:
1 Includes one standby centrifuge. Also includes Centrifuge No. 3 (large) that is recommended to be installed during the Interim Improvements Project. 2
The design maximum liquid flow capacity of the existing small centrifuges is 185 gpm. However, the main treatment process is currently overloaded on nitrogen treatment capacity. As a result of this, only one centrifuge can be run at a time with a flow limit of 115 gpm. A liquid flow limit of 150 gpm per centrifuge was used in the analysis (assuming sidestream treatment would allow the existing centrifuges to be run at a higher flow than is currently possible). 3 The capacity of the new large centrifuges are estimated so that the required dewatering for each respective stage can be completed with approximately 7 hours of operation per day, 7 days per week. 4 Includes impacts from food waste (7,226 gpd being fed directly to the digesters). 5 Assumes operation of 7 hours/day, 7 days/week. 6
Includes impacts from food waste (4,821 dry lb/d being fed directly to the digesters).
ATTACHMENT 2
REDUCED RECORD SET
NOT TO SCALE
NEW CENTRIFUGE 2, S1 NEW CENTRIFUGE 3, S2 NEW CENTRIFUGE 1, INT 0 3 6 9 12 15
FEET
NEW CENTRIFUGE
FEED PUMP 3, INT
NEW POLYMER
DILUTION UNIT 3, INT
LEGEND
Interim - 8.23 MGD
Stage 1 - 12.87 MGD
Stage 2 - 17.5 MGD
Existing
INT
S2
S1
Figure 10-12
New Sludge Dewatering Centrifuges
U:\184031535\drawing\graphics\manteca_wqcf__________.ai mlm march-2023 ATTACHMENT 2
10.2.6.3 Digesters and Control Building
The purpose of the anaerobic digesters is to stabilize the organic solids in the primary sludge and thickened WAS prior to dewatering. The anaerobic digesters are designed to attain volatile solids destruction in the range of 55 to 70% on a weight basis (resulting in an approximate volatile fraction in the digested sludge solids of 50-60%). Digesters No. 1 and 2 are 60 feet in diameter with fixed steel covers and hold 523,000 gallons each. Digesters No. 3 and 4 are 65 feet in diameter with floating steel covers and hold 662,000 gallons of sludge and 16,500 cubic feet of digester gas each. In order to achieve the minimum 15-day hydraulic residence time needed to produce Class B biosolids under peak month conditions, a fifth and sixth digester is needed for Stage 1 and Stage 2 of the Phase IV Expansion project, respectively. The fifth and sixth digesters are proposed to have a 65 ft diameter to hold 662,000 gallons of sludge. For each additional digester, a new sludge transfer pump (7.5-hp with a capacity of 800 gpm at 23 TDH) will be needed. Design criteria for the existing and future digesters required for the Phase IV Expansion is presented in Table 10-14.
Table 10-14. Design Criteria for Digesters for the Phase IV Expansion Project Parameter
Existing
Facility
(Interim
Project)
Stage 1
Expansion of
Digesters
Stage 2
Expansion of
Digesters
Number of Digesters 4 5 6
Total Volume, gal 2,370,000 3,032,000 3,694,000
Tank Diameter, ft 60 (2); 65 (2) 60 (2); 65 (3) 60 (2); 65 (4) Flows
Average Flow1, gpd 93,491 136,633 181,716
Peak Month Flow1, gpd 109,607 161,369 215,299
Hydraulic Residence Time
Hydraulic Residence Time at the Average Flow, days 25.4 22.2 20.3 Hydraulic Residence Time at the Peak Month Flow, days 21.6 18.8 17.2 Notes:
1 Includes food waste (7,226 gpd).
Key:
gpd = gallons per day
The Digester Control Building includes sludge control equipment, sludge transfer pumps, hot water equipment, heated sludge pumps, plant air system, and the biogas management system. The Digester Control Building will need to be expanded to include equipment needed for the fifth and sixth digester. For each additional digester, a new sludge pump, hot water pump with a 3-way valve (2-hp with a capacity of 150 gpm) and grinder (3-hp with a capacity of 1,100 gpm) will be needed. During the Stage 1 expansion, it is proposed to expand the Digester Control Building approximately 2,800 sq. ft., which will support four additional digesters.
ATTACHMENT 2
10.2.6.4 Biosolids Disposal
Currently dewatering biosolids are disposed by loading into roll off bins and hauling to the Forward Landfill. However, there is uncertainty how much longer biosolids can be taken to this landfill which is estimated to run out of capacity by 2039. Also, a key strategy of SB 1383, Short-Lived Climate Pollutants Reduction Act is to divert organic waste from landfills which will make it difficult to take biosolids to any landfill in the future.
Biosolids disposal alternatives were evaluated in the Biosolids and Biogas Utilization Plan by HERWIT Engineering, April 2016. The recommendation from this study is to process the biosolids to Class A, or to Exceptional Quality (EQ) criteria. This is most easily achieved by drying dewatered biosolids from the centrifuge to greater than 75% solids. The benefit of this is additional flexibility in reuse, and reduction in biosolid hauling costs. This level of processing allows for sales to the public, and reuse of the product in City landscaping. Site space at the WQCF should be preserved to allow for future drying options as shown on Figure 10-8.
10.2.7 Effluent Cooling and Disposal
10.2.7.1 Effluent Cooling
The existing NPDES permit currently limits the maximum flow capacity to 9.87 Mgal/d average dry weather flow before cooling the effluent is required. This requirement is based on hydrodynamic and thermal modeling studies of the San Joaquin River in 2006 and 2008. A comparison of recent effluent discharge and river temperatures from 2016 through 2021 has shown an increase in the temperature difference between the plant effluent and the river of 2°F to 5°F over what was used for all previous modeling. Therefore, a new river temperature study is recommended before proceeding with the design of the effluent cooling system.
Instead of constructing cooling towers as recommended in the previous studies, effluent could be used for groundwater recharge to help mitigate overdraft of the Eastern San Joaquin Groundwater Basin.
However, because of the relatively shallow depth to groundwater in the Manteca area, this use is not considered feasible in the central Manteca area. An export pump station and pipeline several miles in length would have to be constructed to an area of the basin with a greater groundwater deficit. As discussed in the Reclaimed Water Facilities Master Plan (Woodard & Curran, January 2023), this alternative has not been carried forward to the level of project alternative development but could be studied further in the context of the Sustainable Groundwater Management Act of 2014 which will require implementation of a Groundwater Sustainability Plan in the region.
Another potential alternative to the cooling towers is tertiary storage ponds where natural cooling can occur. A model was developed to estimate the magnitude of heat losses and gains by various mechanisms as listed below:
Heat Losses: Atmospheric Radiation
Surface Evaporation
Surface Convection
ATTACHMENT 2
Heat Gains: Solar Radiation
Heat loss to the environment is dependent on the altitude, ambient air temperature, humidity, wind speed, and cloud coverage. Monthly average values for these parameters in Manteca were used. The monthly average temperatures for different size ponds are shown in Figure 10-13. It must be noted that the focus of the investigation was to determine the approximate impact that could be expected by adding the tertiary storage ponds. Since these calculations are not exact, but give a reasonable estimate of the heat loss, a pilot study would be required to verify the impact before embarking on the construction of a fullscale tertiary storage ponds.
Figure 10-13. Tertiary Storage Basin Temperatures
As previously discussed, a new river modeling study is required to determine how much cooler the effluent must be for permit compliance, and through pilot testing, how many acres of ponds are needed for the next phase expansion project. Assuming a conservative estimate of 2 acres per Mgal/d, a total of 35 acres would be required for expanding the WQCF to 17.5 Mgal/d ADWF.
If a suitable groundwater recharge project is not found and effluent cooling basins can’t provide sufficient cooling, then effluent cooling towers are recommended. Because the plant must comply with the permit at all times, a redundant cooling tower is recommended to allow maintenance of the cooling towers.
Cooling towers are sized based on total effluent flow. To provide blending of the cooling tower effluent for temperature averaging, a cooling effluent storage basin will be constructed for storing the cooled effluent before delivery to the San Joaquin River. A new pump station will be required to pump the cooled effluent ATTACHMENT 2
from the basin through the existing outfall pipeline to the San Joaquin River. A layout of the proposed cooling tower facility is shown in Figure 10-14.
ATTACHMENT 2
COOLING EFFLUENT BASIN,
2.81 ACRES, 10’ DEEP
COOLING TOWERS 4 AGGREGATE BASE ROAD (TYP)
COOLING BASIN
EFFLUENT PUMP
STATION
COOLING TOWERS
CONCRETE
FOUNDATION
COOLING TOWERS 5
COOLING BASIN
EFFLUENT PUMP 4
COOLING TOWERS 3
COOLING TOWERS 2
COOLING TOWERS 1
ACCESS RAMP
CONNECTED TO
EXISTING ROAD
MCC
LEGEND
Stage 1 - 12.87 MGD
Stage 2 - 17.5 MGD
Figure 10-14
Effluent Cooling Towers
U:\184031535\drawing\graphics\manteca_wqcf__________.ai mlm march-2023 ATTACHMENT 2
Design Criteria for the cooling towers is presented in Table 10-15.
Table 10-15. Design Criteria for Cooling Towers for the Phase IV Expansion Project Parameter Stage 1
Cooling Towers
Stage 2
Cooling Towers
Peak Flow, Mgal/d 21.30 31.08
Number of Cooling Towers 1 4 5
Design Flow per Unit, Mgal/d, (each) 8.76 8.76
Design Flow with One Unit Out of Service, Mgal/d 26.3 35.0 Air flow per Unit, cfm (each) 780,200 780,200
Unit Dimensions (each) 28'-3 5/8" x 51'-1" x 19'-5 5/8" Entering Fluid Temperature, °F 75
Leaving Fluid Temperature, °F 60
Notes:
1 Includes one standby cooling tower.
Key:
cfm = cubic feet per minute
Mgal/d = millions of gallons per day
10.2.7.2 Effluent Pumping
Effluent pumping at the WQCF is currently comprised of two 100-hp pumps (located in a wet well connected to the UV disinfection system) to convey final effluent during high water levels in the San Joaquin River. Currently, the pumps are designed for a capacity of 6,700 gpm (9.65 Mgal/d) at a TDH of 45 feet based on pumping to the San Joaquin River. The Phase IV Expansion project will require two new effluent pumps (one for Stage 1 and one for Stage 2) that will also be used to pump effluent to the proposed cooling towers. Since the pumps will still need to be able to convey final effluent to the San Joaquin River during high water levels, the same pump model as existing is recommended to be installed for the Phase IV Expansion project. However, there will not be firm capacity (standby pump) for the Phase IV Expansion project. The operators have noted that the existing effluent pumps have never been needed. Therefore, it is considered acceptable to not have an extra standby pump for pumping directly to the San Joaquin River. It is estimated that the same effluent pumps will have firm standby capacity to convey final effluent to the cooling towers, so if there is a situation where peak flows are occurring during high water levels in the San Joaquin River and there is an effluent pump out of service, the remaining effluent pumps can be used to convey effluent to the cooling towers instead (even if cooling is not needed at that time) as the cooling basin will offer some equalization capacity. The system curve for pumping to the cooling towers will be determined during preliminary design. However, it should be noted that since there is less headloss incurred when pumping to the cooling towers, it may be required to throttle the valve(s) on the discharge header(s) of the effluent pump(s) in use in order to not run off the pump curve when pumping to the cooling towers. The existing effluent pump wet well will need to be modified as shown on Figure 10-15.
ATTACHMENT 2
REMOVE AND WASTE
EXISTING 42” FE PIPE
AND FITTINGS
REMOVE AND WASTE
EXISTING FLAP GATE
AND SUPPORTS
INSTALL NEW EFFLUENT
PUMP EFFP-08-03 (S1) &
PUMP EFFP-08-04 (S2)
AND PUMP BASES
INSTALL NEW
42” CHECK VALVE
CONNECT TO
EXISTING FLANGE
INSTALL NEW
42” FE PIPE
AND FITTINGS
NEW 42” FE PIPE
CONNECT TO
EXISTING 42” FE PIPE
LEGEND
PROPOSED PIPING/EQUIPMENT - STAGE 1
PROPOSED PIPING/EQUIPMENT - STAGE 2
PROPOSED STRUCTURE
(E) PIPING/EQUIPMENT
(E) STRUCTURE
Figure 10-15
Effluent Pump Station Modifications
U:\184031535\drawing\graphics\manteca_wqcf__________.ai mlm march-2023 ATTACHMENT 2
Design criteria for the existing and future effluent pumps required for the Phase IV Expansion is presented in Table 10-16.
Table 10-16. Design Criteria for Effluent Pumps for the Phase IV Expansion Project Parameter
Existing
Facility
(Interim
Project)
Stage 1
Expansion of
Effluent
Pumps at
Southside
Stage 2
Expansion of
Effluent
Pumps at
Southside
Peak Flow, Mgal/d 11.54 21.30 31.08
Number of Pumps 2 3 4
Pump Horsepower 100 100 100
Pump Capacity to San Joaquin River, Mgal/d @ ft TDH (each) 1 9.65 @ 45 9.65 @ 45 9.65 @ 45 Pump Capacity to Cooling Towers To be determined during preliminary design Notes:
1 The noted capacity is the current design capacity of the pumps to convey final effluent to the San Joaquin River when water levels in the river are high. The revised capacity of these pumps following the installation of additional pumps should be determined during preliminary design.
Key:
Mgal/d = millions of gallons per day
TDH = total dynamic head
It was assumed that the cooling basin effluent pump station would have the same layout and pumps as the effluent pump station connected to the UV disinfection system. Since the cooling effluent basin provides some equalization capacity, it is estimated that this model pump will provide firm capacity with three pumps for Stage 1 and four pumps for Stage 2. Design criteria for the Cooling Effluent Pumps is presented in Table 10-17.
Table 10-17. Design Criteria for Cooling Basin Effluent Pumps for the Phase IV Expansion Project
Parameter Stage 1
Cooling Basin Effluent Pumps
Stage 2
Cooling Basin Effluent Pumps
Peak Flow, Mgal/d 1 21.30 31.08
Number of Pumps 3 4
Pump Horsepower 100 100
Pump Capacity 2 To be determined during preliminary design Notes:
1 This is the peak flow from the UV disinfection system. The cooling basin will provide some equalization capacity. The required design capacity of the cooling basin effluent pumps will be determined during preliminary design. 2 The capacity of the current pumps at the UV disinfection facility to convey final effluent to the San Joaquin River when water levels in the river are high is 9.65 Mgal/d at a TDH of 45 feet. The new cooling basin effluent pump station will have a different design capacity as the elevations and force main length will be slightly different. The capacity of the cooling basin effluent pumps will be determined during preliminary design.
Key:
Mgal/d = millions of gallons per day
TDH = total dynamic head
ATTACHMENT 2
10.2.8 New Municipal Utilities Building and Entrance Road The WQCF has inadequate building space for the existing plant staff. New building space will also be required for additional staff to operate and maintain new treatment facilities for the next plant expansion as discussed in Chapter 11. To provide the required building space, it is recommended that a new Municipal Utilities Building be constructed at the WQCF. The proposed building, as shown on Figure 10- 8, would be located adjacent to a new entrance road at the northeast end of the WQCF property just south of the intersection of West Yosemite Avenue and Swanson Road where a new intersection with traffic signal lights is being planned.
The proposed Municipal Utilities Building will serve all departments in public works including water, solid waste, and wastewater. The building will have a future occupancy of approximately 160 people and include reception area, restrooms, office space, conference rooms, and will also include shower and locker room space for operations and maintenance staff. Based on a building occupancy space requirement of 312.5 square feet per occupant the proposed Municipal Utilities Building will be approximately 50,000 square feet. The estimated construction cost (in current dollars) is $30M which will be shared equally between the three departments.
The recommended project will also include an asphalt paved parking lot for the building and automated road access gates on the entrance road after the building to restrict public access to the main treatment plant as shown on Figure 10-8.
10.3 PHASE IV EXPANSION PROJECT COSTS
Preliminary estimates of total project costs are presented in the following Table 10-18. Construction costs were developed using costs for similar construction at other wastewater treatment plants and equipment manufacturer quotes. These costs are based on an Engineering News Record Construction Cost Index (ENRCCI) 20-Cities Average of 13,176 (representing costs in March 2023 dollars). The total project costs (including project construction, engineering, administration, and construction management) are estimated at $146.3 million and $70.6 million for the Stage 1 and Stage 2 expansions, respectively. It should be noted that these costs will have to be escalated as appropriate to get costs at the actual times of construction.
ATTACHMENT 2
Table 10-18. Phase IV Expansion Project Costs
Description Stage 1 Project Cost Stage 2 Project Costs
Influent Flow Meters $896,000 $0
Influent Pumps $597,000 $989,000
Aerated Grit Tanks at Southside Plant $1,055,000 $1,055,000 Primary Sedimentation Basins at Southside Plant $4,611,000 $4,611,000 Extend Aeration Basins at Southside Plant $936,000 $0
Splitter Structure $468,000 $63,000
Fine Screens for MBRs $2,802,000 $900,000
MBRs Structure & Equipment $15,399,000 $15,399,000
MBR Blower Building and Equipment $1,878,000 $1,878,000 Effluent Pump Station Expansion & Pumps $806,000 $582,000 Cooling Effluent Basin $2,013,000 $0
Effluent Cooling Towers $11,835,000 $2,555,000
Cooling Basin Effluent Pump Station $2,658,000 $582,000 DAFTs $2,240,000 $0
Biotower Demolition $500,000 $0
Anaerobic Digesters $2,660,000 $2,660,000
Digester Control Building Extension & Equipment $1,095,000 $255,000 Centrifuge and Ancillary Equipment $2,923,000 $2,923,000 Municipal Utilities Building and Entrance Road $10,685,000 $0 Biosolids Drying Facilities $17,308,000 $5,769,000
Subtotal Construction Estimate $83,365,000 $40,221,000
Construction Estimating Contingency @30% $25,010,000 $12,066,000 Construction Cost with Contingency $108,375,000 $52,287,000 Engineering, CM, and Admin @35% $37,931,000 $18,300,000 Total Project Cost $146,306,000 $70,587,000
Key:
MBR = Membrane Bioreactor
DAFT = Dissolved Air Flotation Thickener
CM = Construction Management
ATTACHMENT 2
11.0 STAFFING PLAN
11.1 INTRODUCTION
The City of Manteca wastewater collection system includes 250 miles of sanitary sewers, 18 lift stations, 18 miles of force mains, and 4,672 manholes. The California State Water Resources Control Board (SWRCB) requires that there be an adequate number of qualified wastewater personnel to maintain efficient operation of the wastewater infrastructure.
The WQCF consists of a single permitted treatment plant with the main secondary treatment process split into two plants: The Northside- and the Southside-Plant. The WQCF has a common influent pump station and headworks before flow is split to the Northside and Southside Plants. The secondary effluent is combined into a single process flow stream and is sent to a common filter feed pump station, flocculation basin, tertiary filter, and UV facility, prior to final effluent pumping and disposal. The solids handling and biogas treatment and reuse system for the Northside and Southside Plants are combined into a common biosolids/biogas treatment system.
The WQCF is currently classified by the SWRCB as a Class IV plant (a tertiary plant with design flows greater than 1.0 and less than 10.0 Mgal/d). For the Phase IV Stage 1 Expansion Project, the plant will need to be reclassified to a Class V because it will surpass the 10 Mgal/d threshold.
11.2 PURPOSE
The WQCF will undergo Interim capacity improvements that will increase capacity to 8.23 Mgal/d and then a proposed Phase IV Expansion in two stages. Stage 1 will expand the WQCF treatment capacity from about 8.23 Mgal/day to 12.9 Mgal/day and Stage 2 will expand it to a capacity of 17.5 Mgal/day.
The purpose of this chapter is to estimate the manpower requirements to operate the wastewater collection and treatment systems and to discuss the personnel qualifications, responsibilities, and certifications. Further, it will provide recommendations on staffing levels needed to manage the future WQCF and sewer collection infrastructure.
11.3 PLANT CLASSIFICATION AND OPERATOR CERTIFICATION
The City of Manteca WQCF is classified by the California State Water Resources Control Board (SWRCB) as a class IV plant (a tertiary plant with design flows greater than 1.0 and less than 10.0 Mgal/d). The Chief Plant Operator (CPO) must possess at least a valid Grade IV operator certificate and is responsible for the overall operation of the WQCF, including compliance with the WDR. When the plant is expanded above 10 Mgal/d, the plant will be classified to Class V and the Chief Plant Operator (CPO) must possess a valid Grade V operator certificate. (See Tables 11-1 and 11-2). When the CPO is unable to carry out the responsibilities of the position, they must appoint a Designated Operator-in-Charge (DOIC). The DOIC must possess a valid Grade III operator certificate and will be responsible for the overall operation of the WWTP when the CPO is unavailable. Each operator shall possess at least a ATTACHMENT 2
Grade I certificate or a valid operator-in-training (OIT) certificate. 50% of operators shall possess at least a valid Grade II certificate or valid OIT certificates at the Grade II level or higher.
In order for a Grade II operator to be responsible for the overall operation of the WQCF, temporarily considered a DOIC when neither the CPO or DOIC are available, the operator needs specific approval granted by the State Board to be designated a “Lone Operator”. To receive Lone Operator designation, the City must demonstrate difficulty, despite due diligence, in hiring a certified operator of the appropriate grade. If granted, the Lone Operator approval is only valid for six-months. Further, there must be procedures in place that document how the Lone Operator will communicate with the CPO or DOIC when direction is needed. It is important for the City to consider underlying risks associated with rotating a Lone Operator into a position directly responsible for the overall operation of the WWTP when they are not receiving immediate supervision.
11.3.1 Operator Certification
There are five levels of operator certification (Grades I through V). To receive a certificate, a person must meet the minimum experience and education requirements and pass a written test. Table 11-3 details the experience and education requirements of the State Water Resources Control Board for each operator grade level. For more information on the certification of operators, contact:
The SWRCB, Office of Operator Certification
Post Office Box 944212
Sacramento, CA 94244
(916) 341-5639/341-5985
https://www.waterboards.ca.gov/water_issues/programs/operator_certification/exams.html ATTACHMENT 2
Table 11-1. Wastewater Treatment Plants Classification 1,2 Class Wastewater Treatment Process Design Flow (Mgal/d) I Primary……………………………...
Conventional Treatment Pond……
1.0 or less
All
II
Primary……………………………...
Biofiltration………………………….
Modified Treatment Pond…………
>1.0 - 5.0
1.0 or less
All
III
Primary……………………………...
Biofiltration………………………….
Activated Sludge…………………...
Sequencing Batch Reactor……….
Tertiary……………………………...
>5.0 - 20.0
>1.0 - 10.0
5.0 or less
1.0 or less
1.0 or less
IV
Primary……………………………...
Biofiltration……………………..…...
Activated Sludge…………………...
Sequencing Batch Reactor…..…...
Tertiary……………………………...
>20.0
>10.0 - 30.0
>5.0 - 20.0
>1.0 - 10.0
>1.0 - 10.0
V
Biofiltration……………………..…...
Activated Sludge…………………...
Sequencing Batch Reactor…..…...
Tertiary……………………………...
>30.0
>20.0
>10.0
>10.0
Notes: 1
Section 3675 of Operator Certification Regulations: California Code of Regulations, title 23, division 3, chapter 26, section 3670 et seq. 2 Obtained from the SWRCB Wastewater Treatment Plant Classification Brochure.
Table 11-2. Minimum Required CPO and DOIC 1,2
WWTP Classification Minimum Grade Level of CPO Minimum Grade Level of DOIC I I I
II II I
III III II
IV IV III
V V III
Notes: 1
Section 3680(a) of Operator Certification Regulations: California Code of Regulations, title 23, division 3, chapter 26, section 3670 et seq. 2
Obtained from the SWRCB Wastewater Treatment Plant Classification Brochure.
ATTACHMENT 2
Table 11-3. Operator Certification Requirements Table 1,2
PATH EXAMINATION
Education Requirements
CERTIFICATION
Qualifying Experience
Requirements
GRADE 1
1 High school diploma or equivalent and 6 educational
points and 1 year of full-time qualifying experience
GRADE II
1 High school diploma or equivalent and 9 educational
points and 18 months of full-time qualifying experience as a Grade I operator 2 High school diploma or equivalent and 12
educational points and 2 years of full-time qualifying experience 3 Associate’s degree, a higher degree, or a minimum
of 60 college semester units, including a minimum of
15 semester units of science courses
and 1 year of full-time qualifying
experience
GRADE III
1 High school diploma or equivalent and 12
educational points and 3 years of full-time qualifying experience as a Grade II operator 2 High school diploma or equivalent and 18
educational points and 4 years of full-time qualifying experience 3 Associate’s degree or a minimum of 60 college
semester units, including a minimum of 15 semester
units of science courses
and 2 years of full-time qualifying
experience
4 Bachelor’s degree or a higher degree, including a
minimum of 30 semester units of science courses and 1 year of full-time qualifying experience
GRADE IV
1 High school diploma or equivalent and 32
educational points and 6 years of full-time qualifying experience 2 Associate’s degree or a minimum of 60 college
semester units, including a minimum of 15 semester
units of science courses
and 4 years of full-time qualifying
experience
3 Bachelor’s degree or a higher degree, including a
minimum of 30 semester units of science courses and 3 years of full-time qualifying experience 4 Valid registration as a chemical, civil, or mechanical engineer issued by the California Board for
Professional Engineers and Land Surveyors or by
another state, territory, or Indian tribe
and 2 years of full-time qualifying
experience
GRADE V
1 High school diploma or equivalent and 48
educational points and 10 years of full-time qualifying experience 2 Associate’s degree or a minimum of 60 college
semester units, including a minimum of 15 semester
units of science courses
and 6 years of full-time qualifying
experience
3 Bachelor’s degree or a higher degree, including a
minimum of 30 semester units of science courses and 5 years of full-time qualifying experience 4 Valid registration as a chemical, civil, or mechanical engineer issued by the California Board for
Professional Engineers and Land Surveyors or by
another state, territory, or Indian tribe
and 4 years of full-time qualifying
experience
Notes: 1
Applicants must take and pass the Office of Operator Certification Wastewater Treatment Plant Operator Examination before applying for Certification.
2 Obtained from the SWRCB Operator Certification Requirements Table (April, 2013) ATTACHMENT 2
11.4 STAFF RESPONSIBILITIES
11.4.1 Operations
General operations tasks for the WQCF will include daily inspections, running equipment, biological and mechanical process adjustment and monitoring, management of delivery and hauling of chemicals, conducting and participating in coordination meetings, and reporting.
11.4.2 Maintenance
Maintenance is needed for the WQCF and for the wastewater collection systems. WQCF maintenance tasks will generally include equipment removal, disassembly, rebuild, and reinstallation. Regular maintenance activities include daily checks to ensure that equipment is operating properly and identify maintenance issues that require attention. In general, rotating equipment such as rotating screens, thickeners, centrifuges, blowers, and pumps will require regular cleaning and replacement of lubrication oil and filters, belt tension adjustment, chemical pump calibration, and vibration checks, etc.
Maintenance for wastewater collection includes inspecting the pipes and manholes for damage or blockages, removing any debris that may be clogging the pipes, and flushing the system to remove any buildup and sediment that may have accumulated.
11.4.3 Laboratory & Regulatory Compliance
Laboratory staff are responsible for regular monitoring of process performance and permit-required analysis, including sampling at various locations in the plant, laboratory analysis of the samples, report preparation, and nutrient analysis. Regulatory and Compliance staff ensure that the facility is following all applicable environmental laws and regulations.
11.4.4 SCADA
Supervisory Control and Data Acquisition (SCADA) staff are responsible for designing, installing, programming, and monitoring systems for wastewater treatment plants. SCADA engineers ensure the treatment system is running reliably, alarm the operators if equipment is not functioning properly, store historical data, and troubleshoot any issues that arise to improve the overall efficiency of the system.
Other tasks include ensuring data collected is accurate and representative.
11.4.5 Supervisory
Supervisory staff perform duties that include managing staff, implementing procedures to complete all operation and maintenance tasks, coordinating with other City officials and outside agencies, and ensuring that the plant meets all regulatory requirements. Supervisors schedule staff to ensure that enough personnel are on-site to meet operations, maintenance, and laboratory needs.
ATTACHMENT 2
11.5 CURRENT STAFFING
Half the staff at Manteca WQCF are currently working Monday through Thursday and the other half work Tuesday through Friday. The WQCF is manned by one operator who works overtime on the weekends, plus callouts. In general, staffing positions are designated into five categories: operations and maintenance, laboratory & regulatory compliance, collection system, supervisory/administration, and SCADA. Currently, there are 45 full-time employees for the wastewater treatment and collection system.
The current organization chart is shown in Figure 11-1 below.
ATTACHMENT 2
Senior
Instrumentation
Technician (1)
Lead WW
Maintenance
Worker (1)
WW
Operations
Manager (1)
Water Resources
Regulations
Manager (1)
Deputy Director
Water
Resources (1)
Lead WW Plant
Maintenance
Worker (1)
Lead
Lab Tech (1)
Lab Tech 2 (1)
Lab Tech 1 (2)
WW
Maintenance
Supervisor (1)
Water
Resources
Coordinator (1)
Senior Environmental
Compliance
Inspector [0]
Environmental
Compliance
Inspector (1)
WW Collections
System
Supervisor (1)
Lab
Supervisor (1)
Public Works
Director (1)
Note:
[0] indicates the position is vacant
and (#) indicates the number of staff
currently staffed for the position.
Administrative
Assistant III (1)
WW Operations
Supervisor (1)
SCADA
Engineer (1)
Maintenance
Planner (1)
WW
Maintenance
Worker III (2)
Instrument
Tech/Electrician
(2)
WW
Maintenance
Worker II (1)
Utilities
Mechanic (5)
WW
Maintenance
Worker I (6)
WW Treatment
Operator 3 (8)
WW Plant
Maintenance
Worker I (1)
Figure 11-1
Current Organization Chart
U:\184031535\drawing\graphics\manteca_wqcf__________.ai mlm march-2023 ATTACHMENT 2
11.6 FUTURE EXPANSION
The Manteca WQCF will undergo an expansion from 8.23 Mgal/d to 17.5 Mgal/d that will take place in 2 Stages with each stage having an incremental treatment capacity of 4.65 Mgal/d.
Each stage would include the constructing of a two train 4.65 Mgal/d Membrane Bioreactor (MBR) with appropriate expansion to the influent pump station, grit removal, primary sedimentation tanks and solids handling. The expansion will likely trigger adding cooling towers. The MBR and the cooling towers are new processes which would require more staffing.
11.7 STAFFING FOR CURRENT AND FUTURE EXPANSIONS
Staffing for operations and maintenance of the WQCF and its laboratory was primarily estimated from the Northeast Guide for Estimating Staffing at Publicly and Privately Owned Wastewater Treatment Plants.
That guide was prepared by the New England Interstate Water Pollution Control Commission in November 2008. Engineering judgment and data from similar facilities were used when not explicitly included in the Northeast Staffing Guide. The current and future staffing requirements are based on the number of unit processes and the time required for operations and maintenance of each unit process/equipment. The total number of hours to operate and maintain the WQCF needs to be matched with onsite person-hours (i.e., excluding vacation, sick time, daily breaks, and daily mobilization and demobilization). This analysis assumed that the City of Manteca staff would have approximately 1,500 onsite person-hours per year.
11.7.1 Operations and Maintenance for WQCF
Tables 11-4 and 11-5 show the operation and maintenance estimate summary for Stage 1 and Stage 2, respectively. As shown in the Tables, the Stage 1 would require about 19,319 operations hours, which is equivalent to 13 operators (19,319 /1,500 = 13). No more operators are needed for Stage 2 because the number of operators is determined by the how many processes in the system rather than the number of units in each process.
Unlike operations, the more units in each process, the more time (and personnel) needed to maintain the equipment. The time required to maintain future expansions would be 19,445 and 23,594 hours per year which would require 13 and 16 maintenance staff members for Stages 1 and 2, respectively.
ATTACHMENT 2
Table 11-4. WQCF Operations and Maintenance Staff Requirements for Stage 1 1 Parameter # of Units More
Description
Operations
(hr/Year)
Maintenance
(hr/Year)
Total
Hours
(O&M)
Stage 1 (12.9 Mgal/d)
Mechanical Screens 4 522 1,044 1,566
Manual Screens 1 13 65 78
Septage Receiving 1 261 65 326
Grit Removal 6 Tanks 1,044 783 1,827
Influent Pump Station 5 Pumps 261 261 522
Primary Sedimentation Tanks 8 Tanks 2,349 2,088 4,437
Aeration Basins 12 Basins 4,176 3,758 7,934
Secondary Clarifiers 5 Clarifiers 1,044 653 1,697
RAS/WAS Pump Station 10 Pumps 783 522 1,305
DAFT 3 261 235 496
Filter Feed Pump Station 4 Pumps 261 209 470
Tertiary Filtration 6 Filters 261 313 574
UV Disinfection 10 Racks 261 914 1,175
Effluent Pump Station 5 Pumps 261 261 522
Chlorine Contact Basin 1 Basin 26 78 104
Chemical Feed System 2 System 488 157 645
Digesters 5 261 2,610 2,871
Centrifuge Dewatering 2 Centrifuges 1,044 1,566 2,610
Gas Conditioning 1 131 131 261
Odor Control / BioFilter 1 261 131 392
Standby generator 1 26 52 78
Irrigation Pump Station 4 Pumps 1,044 209 1,253
Flare 1 26 52 78
Secondary Effluent Equalization Pond 1 26 26 52
Water Reuse 1 52 522 574
Janitorial/Custodial Staff 1 Service 0 196 196
Mowing 1 Service 0 65 65
Vehicle Maintenance 1 Service 0 26 26
Membrane Basins 4 Basins 2,610 1,044 3,654
Permeate Pumps 4 Pumps 261 209 470
Cooling Towers 4 Towers 1,044 1,044 2,088
Cooling Effluent Pumps 3 Pumps 261 157 418
Summary 19,319 19,445 38,764
Notes:
1 Bold indicates new or changed.
ATTACHMENT 2
Table 11-5. WQCF Operations and Maintenance Staff Requirements for Stage 2 1 Parameter # of Units More
Description
Operations
(hr/Year)
Maintenance
(hr/Year)
Total
Hours
(O&M)
Stage 2 (17.5 Mgal/d)
Mechanical Screens 5 522 1,305 1,827
Manual Screens 1 13 65 78
Septage Receiving 1 261 65 326
Grit Removal 8 Tanks 1,044 1,044 2,088
Influent Pump Station 6 Pumps 261 313 574
Primary Sedimentation Tanks 10 Tanks 2,349 2,610 4,959
Aeration Basins 14 Basins 4,176 4,385 8,561
Secondary Clarifiers 5 Clarifiers 1,044 653 1,697
RAS/WAS Pump Station 14 Pumps 783 731 1,514
DAFT 4 261 313 574
Filter Feed Pump Station 4 Pumps 261 209 470
Tertiary Filtration 6 Filters 261 313 574
UV Disinfection 10 Racks 261 914 1,175
Effluent Pump Station 6 Pumps 261 313 574
Chlorine Contact Basin 1 Basin 26 78 104
Chemical Feed System 2 System 488 157 645
Digesters 6 261 3,132 3,393
Centrifuge Dewatering 2 Centrifuges 1,044 1,566 2,610
Gas Conditioning 1 131 131 261
Odor Control / BioFilter 1 261 131 392
Standby generator 1 26 52 78
Irrigation Pump Station 4 Pumps 1,044 209 1,253
Flare 1 26 52 78
Secondary Effluent Equalization Pond 1 26 26 52
Water Reuse 1 52 522 574
Janitorial/Custodial Staff 1 Service 0 196 196
Mowing 1 Service 0 65 65
Vehicle Maintenance 1 Service 0 26 26
Membrane Basins 8 Basins 2,610 2,088 4,698
Permeate Pumps 8 Pumps 261 418 679
Cooling Towers 5 Towers 1,044 1,305 2,349
Cooling Effluent Pumps 4 Pumps 261 209 470
Summary 19,319 23,594 42,914
Notes:
1 Bold indicates new or changed.
ATTACHMENT 2
11.7.2 Laboratory & Regulatory Compliance
The laboratory’s staffing requirements include direct effort, and indirect effort. Direct effort is time spent to sample analysis. For example, if it is required to measure BOD four times per week and it takes 2.5 hours for a laboratory tech to collect and analyze the sample, then the direct effort for this test is calculated as follows:
2.5 hours/test x 4 tests/week x 52 weeks / year = 520 hours/year Actual in-house testing parameters for different sampling locations, frequency and time needed for analysis of these parameters are obtained from the WQCF laboratory. The sum of the total hours required for the direct efforts are summarized in Table 11-6.
Table 11-6. Direct Labor Required for WQCF Laboratory
Parameter Testing Time (hrs/Yr)
Influent Monitoring 1,342
Effluent Monitoring 897
Land Application Area Wastewater Monitoring Requirements 451 Recycled Water Monitoring Requirements 365
Receiving Water Monitoring Requirements 65
Groundwater Monitoring Requirements 672
Total Time Spent on Testing (Hours) 3,792
The indirect effort accounts for all daily testing-related tasks include:
• Instrument calibration
• Planned and unplanned instrument and automation maintenance • Performing quality control
• Performing proficiency testing
• Stocking supplies
• Filling out paperwork/data entry
• Clerical work
• Managing phone calls
• Report revisions
• Repeat testing
• Test development
ATTACHMENT 2
Currently, there are four (4) laboratory technicians and one (1) laboratory supervisor with a total of five (5) full time employees (FTE) for the laboratory. The total manpower of the laboratory staff (excluding supervisory) is 6,000 manhour/year (1,500 hour/year/FTE x 4 FTE). The calculated indirect effort is 2,208 hour/year (6,000-3,792), which is almost 37% of the total effort.
In the future, there will be more effluent testing for the MBR, mainly turbidity, ammonia, and nitrate. It is estimated that the MBR direct effort to the MBR effluent would be approximately 500 hours. Accounting for the indirect effort associated with the extra testing, one more FTE employee will be needed for Stage
1. No more lab employees will be needed for Stage 2 expansion.
There is currently one staffed regulatory compliance position and one vacant regulatory compliance position. It is recommended to fill the vacant position and add an additional regulatory compliance position to meet existing needs.
11.7.3 Wastewater Collection
Data from other wastewater collection systems (length of sewers and force mains, number of manholes, and number of lift stations) and the number of wastewater collection maintenance employs were obtained to benchmark the staffing requirements for Manteca. It was found that there is a correlation between the total sewer length and the number of wastewater collection maintenance staff as shown in Figure 11-2. It appears that the wastewater collection maintenance staff is understaffed because there are only 10 employees for 250 miles of sewers compared to 16 employees for Merced, which has only 20 more miles of sewers (270 miles). In addition to the workload, the sanitary sewer collection maintenance crew also maintain the stormwater collection, which includes 114 Storm Stations. This requires approximately 1,150 manhours per year. The stormwater workload warrants one extra full time employee. To manage Manteca’s existing 250 miles of sewers, it is recommended to add three (3) more staff (two [2] wastewater collection and one for storm water) for a total of 13. It is recommended that after each expansion stage, one additional wastewater collection maintenance staff member be added to manage the expanded collection system (i.e., total of 14 and 15 employees for Stage 1 and Stage 2, respectively).
ATTACHMENT 2
Figure 11-2. Correlation Between Total Sewer Length and Number of Maintenance Employees
11.7.4 Supervisors/Administration
There are currently eleven (11) full time supervisory and administrative staff: eight (8) supervisors and three (3) in administration. It is recommended to include one additional admin staff as the current workload of the Administrative Assistant III is unmanageable. No additional staff is needed for the Stage 1 or 2 expansions to maintain sufficient operation of the WQCF and collection system.
11.7.5 SCADA
There is currently one (1) full time SCADA Engineer. If the workload exceeds their capabilities, it is recommended to outsource some of the work to outside instrumentation and control consultants.
11.8 SUMMARY
A summary of the staffing recommendations for before and after the expansions are shown in Table 11-7.
Table 11-7. Summary of Staffing Recommendations
Parameter
Persons
Existing Recommended for
Existing
Stage 1 (12.9
Mgal/d)
Stage 2 (17.5
Mgal/d)
WQCF Operations 8 10 13 13
WQCF Maintenance 10 10 13 16
Laboratory & Regulatory
Compliance 5 7 8 8
SCADA 1 1 1 1
Collection System 10 13 14 15
Supervisory/Admin 11 12 12 12
Net Total 45 53 61 65
0 2
4 6
8 10
12 14
16 18
0 50 100 150 200 250 300
Number of Wastewater Collection Maintinance Staff
Total Sewer Length (Miles)
Dixon Benicia Lincoln Merced
Manteca (Current) Manteca (Stage1) Manteca (Stage2)
ATTACHMENT 2
A total of eight (8) more FTE are recommended for the existing WQCF and collection system. After the Stage 1 expansion, total recommended personnel will increase to a total of 61 and after the Stage 2 expansion it will increase to a total of 65. SCADA and Supervisory staff will experience no change during the expansions unless it is deemed necessary. Figure 11-3 shows the additional staffing recommendations. Blue is what is recommended for the existing plant, green is for Stage 1, and pink for Stage 2.
ATTACHMENT 2
WW
Collections
Technician III (2)
WW
Collections
Technician II (1)
WW
Collections
Technician II (1)
WW
Collections
Technician I (6)
WW
Collections
Technician I (1)
WW
Collections
Technician I (1)
WW
Collections
Technician I (1)
Senior
Instrumentation
Technician (1)
Lead WW
Maintenance
Worker (1)
Lead WW
Maintenance
Worker (1)
WW
Operations
Manager (1)
Water Resources
Regulations
Manager (1)
Deputy Director
Water
Resources (1)
Lead WW Plant
Maintenance
Worker (1)
Lead
Lab Tech (1)
Lab Tech 2 (1)
Lab Tech 1 (2)
Lab Tech 1 (2)
WW
Maintenance
Supervisor (1)
Water
Resources
Coordinator (1)
Senior Environmental
Compliance
Inspector (1)
Environmental
Compliance
Inspector (1)
Environmental
Compliance
Inspector (1)
WW Collections
System
Supervisor (1)
Lab
Supervisor (1)
Public Works
Director (1)
Administrative
Assistant III (1)
Administrative
Assistant I (1)
WW Operations
Supervisor (1)
SCADA
Engineer (1)
Maintenance
Planner (1)
Instrument
Tech/Electrician
(2)
Utilities
Mechanic II (1)
WQCF Lead
Operator (2)
WW Treatment
Operator 3 (8)
WW Treatment
Operator 3 (2)
WW Treatment
Operator in
Training (1)
Utilities
Mechanic I (1)
Utilities
Mechanic I (1)
Lead Utilities
Mechanic (1)
Utilities
Mechanic II (1)
Utilities
Mechanic I (1)
Utilities
Mechanic III (2)
Utilities
Mechanic III (1)
Utilities
Mechanic II (1)
Utilities
Mechanic III (1)
WW Plant
Maintenance
Worker I (1)
Legend
Existing Staff Position Title Changes
Existing Staff Recommendations
Stage 1 Staff Recommendations
Stage 2 Staff Recommendations
Note:
(#) indicates the number of staff either
currently staffed for the position or the
number of staff recommended to be
staffed for the position for the respective
phase (existing, Stage 1, or Stage 2).
Figure 11-3
Recommended Organization Chart
U:\184031535\drawing\graphics\manteca_wqcf__________.ai mlm march-2023 ATTACHMENT 2
City-specific staffing details, including compensatory time off, monthly rotation days off, and infrastructure condition/age/probability of failure, must be taken into consideration when determining the final personnel required to successfully operate and maintain the City’s infrastructure investment. The operating hours shown in Tables 11-4 and 11-5 were generated from an established model created by a committee that covers several northeastern states (Interstate Water Pollution Control Commission) but does not consider City-mandated scheduling conflicts or the condition of the infrastructure. The numbers generated in this report should be used as a general guide that can be refined based on site-specific details that are not incorporated into the model. The final staffing decisions should be made based on professional judgement of an experienced local operator.
ATTACHMENT 2
12.0 CAPITAL IMPROVEMENT PROGRAM
The purpose of this chapter is to present a Capital Improvement Program (Program) that summarizes the Capital Improvement Projects (CIPs) identified in the previous chapters of this Master Plan. CIPs are presented chronologically to distribute costs over time in keeping with each project’s criticality or other City priorities, but final project inclusion in the adopted Capital Improvement Program and associated dates are approximate and adjustable. No CIP is final until acted on by the City Council.
This chapter is divided into the following sections:
• Background
• Project Prioritization
• Cost Estimating Methodology
• Proposed Capital Improvement Program
12.1 BACKGROUND
Based on the completed hydraulic modeling and evaluation of the City of Manteca’s wastewater collection system and capacity assessment of the Manteca Wastewater Quality Control Facility (WQCF), a prioritized Capital Improvement Program (Program) was prepared. It is important to note that the Program represents a snapshot of known/observed conditions as of March 2023. Due to the dynamic nature of the wastewater collection system and WQCF operations, project priorities and schedules may change over time. Furthermore, several of the projects identified will require additional analysis, beyond the scope of this Master Plan to determine the exact scope of necessary improvements. Finally, the projects and associated costs identified herein are presented in 2023 dollars and should be reviewed and updated on an annual basis using the Engineering News Record Construction Cost Index (ENRCCI) or another recognized index. The recommended CIPs are segmented into two categories: 1) Wastewater Collection System Projects (WCS), and 2) Wastewater Quality Control Facility Projects (WQCF).
12.2 PROJECT PRIORITIZATION
The Capital Improvement Program CIP prioritization for scheduling projects is based on giving the highest priority to those projects that pose the most risk to the community. The priority raking is as follows: 1) The highest risk to the community is infrastructure that is in poor condition that could potentially cause failure such as a collapsed gravity sewer pipe or treatment process that is not functioning properly; 2) The second highest risk is failure to comply with regulatory requirements such as non-compliant wastewater discharged to the San Joaquin River subjecting the City to mandatory fines; 3) The third highest risk is limited capacity under current flows to convey and treat the wastewater such as gravity sewers that are surcharging at the manholes, 4) The fourth highest priority is limited capacity to serve future growth; and 5) The lowest priority are projects desired by City staff to improve operation and maintenance.
The wastewater collection system evaluation identified seven CIPs (WCS-26 through 32) in Chapter 6 with Priority Ranking 1, and six CIPs in Chapter 5 (WCS-1 through 6) with Priority Ranking 3 because of ATTACHMENT 2
hydraulic capacity limitations at current flows. The remaining CIPs for the wastewater collection system are Priority Ranking 4 to accommodate future growth. Chapter 9 identified 22 Interim CIPs at the WQCF with Priority Rankings from 2 to 5 including permit compliance projects and projects to accommodate population growth until 2030. To accommodate future growth beyond 2030, two CIPs with Priority Ranking 4 (WQCF-23 and WQCF-24) are identified in Chapter 10 (WQCF Phase IV Expansion Stage 1 and Stage 2 Projects).
12.3 COST ESTIMATING METHODOLOGY
A key element to the Capital Improvement Program planning process is determining budgets for each of the identified Capital Improvement Projects. The projects and associated costs identified herein are presented in March 2023 dollars (Engineering News Record Construction Cost Index [ENRCCI] of 13,176) and should be reviewed and updated on an annual basis using the ENRCCI or another recognized index. The project cost estimates include base construction costs and soft costs. The engineering opinion of probable costs for the wastewater collection system falls under Classification 5 (as defined by Association for the Advancement of Cost Engineering, AACE) with an expected accuracy range of -50% to +100%. For projects at the WQCF, the engineering opinion of probable costs falls under Classification 4 with an expected accuracy range of -30% to 50%.
Construction costs were developed based on a combination of equipment quotes supplied from manufacturers, bids on other City wastewater facilities projects, construction cost estimates from similar type construction projects, and standard cost estimating guidelines.
Soft costs include a 30 percent mark-up for construction cost estimating and a 35 percent mark-up of the total construction cost for engineering, construction management and administration, which includes engineering design and engineering services during construction, construction administration, construction inspection services, and general administration costs by City.
12.4 PROPOSED CAPITAL IMPROVEMENT PROGRAM
The recommended CIPs are shown in following Tables 12-1 through 12-4 for the wastewater collection system and Tables 12-5 through 12-7 for the WQCF. A 25-year proposed schedule of the identified CIPs and their associated estimated annual costs was developed and is included in Appendix J. The schedule was prepared based on the Priority Ranking and the costs were then roughly distributed as annual expenditures. However, in some cases, projects with lower rankings are scheduled for implementation sooner than higher ranking projects to address specific City needs. Figure 12-1 shows the annual estimated expenditures for both wastewater collection system and the WQCF.
12.4.1 On-going Collection System Rehabilitation and
Replacement Projects
The City of Manteca Sewer Condition Assessment Report (MSCA) dated August 2017 identified 14 project areas with defective gravity sewer pipelines and/or manhole in need rehabilitation and repair (R&R). Seven of these projects yet to be completed, as identified in Chapter 6, are listed in Table 12-1.
ATTACHMENT 2
It is recommended these projects be given the highest priority because of the potential risk of infrastructure failure.
Table 12-1. Ongoing Collection System Rehabilitation and Replacement Projects CIP Description Project Costs Scheduled
Completion
WCS-26 UPRR Right of Way and Alley Between Center Street and Yosemite Avenue $489,000 2024
WCS-27 Moffat Boulevard and Main Street $1,022,000 2024 WCS-28 Oak Street from Main Street to Willow Avenue $98,000 2024 WCS-29 Sequoia Avenue from Oregon Street to Alley north of Nevada Street $53,000 2024
WCS-30 Tidewater Bike Path from Sandalwood Lane to Louis Avenue $348,000 2024
WCS-31 Walnut Avenue from the alley north of Nevada Street to the UPRR $279,000 2024
WCS-32 St. Dominic’s Drive from north of Yosemite Avenue to Golf Course $29,000 2024
12.4.2 Existing Wastewater Collection System Capacity
Improvements
Wastewater collection system capacity system improvements identified in Chapter 5 to eliminate existing sewer capacity deficiencies are listed in Table 12-2.
Table 12-2. Existing Wastewater Collection System Capacity Improvements CIP Description Project Costs Scheduled
Completion
WCS-01 W. Center Street Trunk $4,880,000 2031
WCS-02 Elm/West North Street Trunk $5,080,000 2031
WCS-03 10-inch East North Street Trunk $1,660,000 2031
WCS-04 8-inch East North Street Trunk $510,000 2031
12.4.3 Previously Identified Wastewater Collection System Projects
The City has already made investments in their future collection system by preemptively installing oversized lines for future gravity sewers. Projects that would complete the construction of these gravity sewers are summarized in Table 12-3.
ATTACHMENT 2
Table 12-3. Previously Identified Wastewater Collection System Improvements CIP Description Project Costs Scheduled
Completion
WCS-05 South Woodward Trunk Extension $12,640,000 2031
WCS-06 Central Union Road Trunk Extension $16,170,000 2026 WCS-07 North Trunk Extension on Airport Way $34,340,000 2035
12.4.4 Future Wastewater Collection System Improvements Wastewater collection system capacity system improvements identified in Chapter 5 to serve future development areas are listed in Table 12-4.
Table 12-4. Future Wastewater Collection System Improvements CIP Description Project Costs Scheduled
Completion
WCS-08 S. Main Trunk to Evans $7,180,000 2032
WCS-09 S. Airport Way and Yosemite Ave. (Fishback) $3,100,000 2032 WCS-10 S. Airport Way Roberts Estates to Daniels $1,750,000 2032 WCS-11 Yosemite Square Lift Station and Improvements $12,880,000 2032 WCS-12 Austin Road Industrial Area Trunk $20,810,000 2035 WCS-13 South Austin Road - Industrial Area $5,780,000 2036 WCS-14 Yosemite Square Service Area $4,240,000 2037
WCS-15 Oleander Avenue Extension/ S. Airport Way Sewer $6,660,000 2036 WCS-16 Highway 99 Crossing at Northland Road $9,310,000 2038 WCS-17 East Lathrop Road Trunk $12,060,000 2040
WCS-18 Construct new 24-inch bypass sewer $6,630,000 2039 WCS-19 Northland Road Branches $6,350,000 2040
WCS-20 Louise/ Nehemiah Branches $5,160,000 2040
WCS-21 South Union Road Extension $4,590,000 2041
WCS-22 Cottage Avenue $3,080,000 2042
WCS-23 North Shed Union Road Trunk $13,130,000 2043
WCS-24 Manteca Junction Trunk $3,730,000 2044
WCS-25 Lovelace Road - 99 Crossing $18,090,000 2044
12.4.5 WQCF Capacity Assessment Interim Improvements
As identified in the WQCF 2021 Capacity Assessment Study, there have been several changed conditions at the WQCF since 2001 that affect the capacity of the WQCF, some of these include the following:
ATTACHMENT 2
• Drought conditions and water conservation in recent years have resulted in increased wastewater strength as the pollutants contributed by a given population are carried in less water to the WQCF.
• An effluent limit on Nitrate + Nitrite Nitrogen (10 mg/L monthly average) was added to the National Pollution Discharge Elimination System (NPDES) Permit for the WQCF. The Phase III design did not consider or provide adequate facilities to meet this requirement at the original 9.87 Mgal/d design flow.
• The biotowers in the Northside Plant, which provided a portion of the treatment capacity established in the Phase III Basis of Design Report, were removed from service because they remove the carbon source needed for denitrification. Therefore, they were incompatible with meeting the new nitrogen permit limit.
Because of these changed conditions, the WQCF does not have the treatment capacity to support ongoing growth within the City. It is recommended that the Interim Improvements listed in Table 12-5 be constructed to increase treatment capacity from 6.36 Mgal/d to 8.23 Mgal/d ADWF (true influent flow without plant recycle). Based on the projected population annual growth rate of 2.8 percent, the interim improvements are expected to provide treatment capacity until January 2030.
Table 12-5. WQCF Capacity Assessment Interim Projects
CIP Description Project Costs Scheduled
Completion
WQCF-01 North and South Plant WAS Pump Replacement Project $2,827,000 2024 WQCF-02 South Plant RAS Pump Replacement Project $1,652,000 2024 WQCF-03 North and South Plant Aeration Basins Improvements $11,696,000 2025 WQCF-04 Sidestream Treatment System $20,205,000 2028
WQCF-05 Add Centrifuge No. 3 $5,130,000 2026
WQCF-06 Add DAFT No. 3 $3,930,000 2026
12.4.6 Instrumentation and Electrical Improvement Projects The following Table 12-6 lists instrumentation and electrical improvements identified in Chapter 9 from previous studies and interviews with plant staff.
ATTACHMENT 2
Table 12-6. Instrumentation and Electrical Improvement Projects CIP Description Project Costs Scheduled
Completion
WQCF-07 I&E Core Supervisory Control and Data Acquisition (SCADA) System $1,127,000 2026
WQCF-08 I&E Remote Site Process Logic Controller (PLC)
Upgrades $1,727,000 2026
WQCF-09 I&E PLC and Operator Interfaced Terminal (OIT)
Replacement $1,374,000 2029
WQCF-10 I&E Switchgear PLC Upgrades $127,000 2027
12.4.7 Other WQCF Interim Projects
The following Table 12-7 lists other improvements that were identified in Chapter 9 from previous studies and interviews with plant staff.
Table 12-7. Other WQCF Interim Improvement Projects
CIP Description Project Costs Scheduled
Completion
Other Interim Improvement Projects
WQCF-11 Add Influent Pump No. 5 $1,048,000 2024
WQCF-12 Lightweight Covers for Process Basins $5,792,000 2029 WQCF-13 Headworks, IPS and Biofilter Improvements $2,080,000 2026 WQCF-14 UV Disinfection System Upgrade $15,583,000 2026 WQCF-15 Plant Water System Piping Modifications $636,000 2024 WQCF-16 Replace Secondary Effluent Equalization Pond Liner $2,101,000 2024 WQCF-17 Headworks Screen No. 3 $900,000 2027
WQCF-18 FOG Receiving Station Screening System $200,000 2024 WQCF-19 Bulk Ferric Chloride Solution Tanks $351,000 2024 WQCF-20 Digesters No. 1 and 2 Overflow Boxes $706,000 2024 WQCF-21 Digester Pressure Relief Valves Platform & Handrailing $205,000 2024 WQCF-22 Install New Waste Heat Radiator $198,000 2024
12.4.8 WQCF Phase IV Expansion Projects
Based on a population growth rate of 2.8 percent and assuming influent loadings to the WQCF increase proportional to population growth, the proposed Interim Improvements will provide treatment capacity until January 2030. The Phase IV Expansion Project would then increase the true ADWF capacity (without inplant recycle) from 8.23 Mgal/d to 17.5 Mgal/d and provide treatment capacity until the year 2057, serving an equivalent Manteca population of 236,000.
ATTACHMENT 2
Expansion from 8.23 Mgal/d to 17.5 Mgal/d (i.e., building 28 years of treatment capacity) in one stage is not recommended because discharge permit requirements are subject to change every five years and future wastewater treatment technologies could make the current treatment technologies obsolete a decade from now. It is recommended that the Phase IV Expansion Project be constructed in two stages, as shown in Table 12-8.
Table 12-8. WQCF Phase IV Expansion Project
CIP Description Project Costs Scheduled
Completion
WQCF-23 WQCF Phase IV Stage 1 Expansion Project $146,306,000 2030 WQCF-24 WQCF Phase IV Stage 2 Expansion Project $70,587,000 2047 Figure 12-1 shows the annual estimated expenditures for both wastewater CIP categories.
Figure 12-1. Proposed CIPs Annual Estimated Expenditures $0
$5,000,000
$10,000,000
$15,000,000
$20,000,000
$25,000,000
$30,000,000
$35,000,000
$40,000,000
$45,000,000
22/2323/2424/2525/2626/2727/2828/2929/3030/3131/3232/3333/3434/3535/3636/3737/3838/3939/4040/4141/4242/4343/4444/4545/4646/47 Wastewater CIP Expenditure
Wastewater Collection WQCF
ATTACHMENT 2
12.5 CONCLUSIONS AND RECOMMENDATIONS
Key conclusions and recommendations from this WWMP and Capital Improvement Program include:
• The average per capita ADWF discharged to the WQCF is 61 gallons per person per day (gpcd).
The United States Census Bureau identifies an average household density of approximately 3.19 persons per household, or persons per equivalent dwelling unit (EDU) within the City of Manteca and was used to translate the per capita flow into the ADWF unit rate of 195 gpd/EDU. • The Manteca full build-out flow (see Chapter 5) is approximately 15.3 Mgal/d (ADWF). Adding Lathrop’s flow contribution of 1.45 Mgal/d gives a total flow of 16.8 Mgal/d (ADWF). Master Planning for 17.5 Mgal/d (ADWF) would provide enough capacity for Manteca’s full build-out flow plus Lathrop and other flow contributions from developments outside of the City such as Oakwood Shores and Raymus Village. Based on an annual population growth rate of 2.8% and assuming influent loadings to the WQCF increase proportional to population growth, 17.5 Mgal/d would provide capacity until the year 2057 serving an equivalent Manteca population of 236,000. • Residual pipe capacity is defined as the remaining capacity in a sewer under peak flow conditions. Areas without residual capacity under existing conditions primarily exist in the Central Shed. Four CIP projects within the Central shed (see Table 5-5) are recommended for pipe upsizing to eliminate these capacity deficiencies. The proposed improvements are sized to accommodate PWWF under future buildout development conditions. • Based on the review of the previous wastewater collection system planning documents, the City has alternated between two collection system strategies: 1) The 2012 Master Plan strategy includes a shallower collection system with a number of interim and permanent sewage lift stations; and 2) The 2006 Master Plan strategy which includes deeper trunk sewers minimizing the overall need for sewage lift stations. This WWMP assumes a deeper trunk strategy to avoid major upgrades to the existing sewage lift stations that would be required to accommodate growth, and to reduce the maintenance costs associated with operating numerous pump stations in the system.
• The City recently completed a project replacing the North Trunk Sewer. The project replaced the 36-inch trunk sewer with a larger and deeper 54-inch sewer. The Central Trunk should be extended from the upstream point of the North Trunk project to bypass the Union Road Sewage Lift Station and allow flow from the Central Shed to flow by gravity to the WQCF. This project identified as the Central Union Road Truck Extension (WCS-06) in the Capital Improvement Program would allow decommissioning of the Union Road Sewage Lift Station which is beyond its useful life and in very poor operating condition.
• The alternative improvements recommended for the Woodward Park Sewage Lift Station include:
1) increasing the firm pumping capacity to meet the maximum inflow of approximately 2.8 Mgal/d by adding an additional pump to the station or swapping out the existing pumps, or 2) installing 4,030 LF of 36-inch sewer to extend the existing South Trunk in Woodward Avenue to reach the unused existing 36-inch sewer at the intersection of Woodware Avenue and S. Main Street. The ATTACHMENT 2
recommended project (WCS-05) is to install the 36-inch sewer pipe which would eliminate the Woodward Park Sewage Lift Station and the Evan’s Sewage Lift Station. • Seven rehabilitation and replacement projects identified in Chapter 6 were given the highest priority rating in the Capital Improvement Program due to the potential for failure such as a collapsed sewer pipe or sanitary sewer overflow due to blockage. It is recommended these projects be scheduled as soon as practical and to continue cleaning and inspecting the pipelines and manholes within the system at a rate of approximately 5% to 10% per year, respectively. • A capacity study of the WQCF completed in 2021 determined immediate improvements to the WQCF that are needed for nitrogen removal. Without these improvements, the WQCF will be challenged to meet permit discharge requirements. The proposed improvements, including sidestream treatment to remove nitrogen from the digester centrate, will provide an estimated 8.23 Mgal/d of ADWF capacity.
• Measured influent flows at the WQCF include plant recycle flows and are not the true influent flow from Manteca’s wastewater collection system and City of Lathrop. The measured influent flow at the WQCF includes plant recycle flows which are approximately 12% of the total measured flow.
From December 2019 through November 2020, the City of Lathrop’s average annual flow was
1.07 Mgal/d or 16.8% of the total true influent flow of 6.36 Mgal/d. Lathrop’s flow limit, if they participate in funding their share of the proposed Interim Improvements, would increase to 1.21 Mgal/d (14.7% x 8.23 Mgal/d).
• Several other Interim Improvement projects to correct WQCF deficiencies are identified in Chapter 9. These projects, listed on Table 9-3, include safety items such as improving the ventilation system for the Headworks and Influent Pump Station, and permit compliance improvements such as upgrading the UV disinfection system. • The recommended WQCF Phase IV Expansion Project to increase the plant capacity to 17.5 Mgal/d ADWF will be constructed in two stages. The first stage project scheduled for completion in 2030, will add Membrane Bioreactors (MBRs) that will be operated in parallel with the existing Conventional Activated Sludge (CAS) treatment system. The project will also include in-kind expansion of pumps, aerated grit tanks, primary sedimentation basins, DAFT, dewatering equipment, digesters, and cooling towers.
• Instead of constructing cooling towers as recommended in the previous studies, effluent could be used for groundwater recharge to help mitigate overdraft of the Eastern San Joaquin Groundwater Basin. However, because of the relatively shallow depth to groundwater in the Manteca area, this use is not considered feasible in the central Manteca area. Further investigation of a suitable groundwater recharge site is recommended as the preferred alternative to cooling towers.
ATTACHMENT 2
13.0 REFERENCES
[1] Reclaimed Water Facilities Master Plan (Woodard & Curran, 2023) [2] Manteca Municipal Services Review (De Novo Planning Group, 2022) [3] Manteca General Plan Update – Revised Public Review Draft General Plan (De Novo Planning Group, 2022)
[4] City of Manteca WQCF 2021 Capacity Assessment (HERWIT & Stantec, 2022) [5] City of Manteca Sewer System Management Plan (Kennedy/Jenks Consultants, 2020) [6] City of Manteca WQCF SCADA Master Plan – Technology Drive Solutions for Safe and Reliable Water Quality (Carollo Engineers, Inc., April 2020)
[7] Multijurisdictional Agreement between Oakwood Lake Water District and Manteca (Manteca Public Works, 2019)
[8] City of Manteca Sanitary Sewer Conditions Assessment (Stantec, 2017) [9] Multijurisdictional Agreement between Lathrop and Manteca (Manteca Public Works, 2016) [10] City of Manteca WQCF Biofilter Evaluation (HERWIT and Stantec, February 2015) [11] City of Manteca 2012 Wastewater Collection System Master Plan Update (NV5, 2013) [12] City of Manteca Wastewater Quality Control Facility Influent Pump Station Condition Assessment (V&A Consulting Engineers, 2012)
[13] TM: CORMIX Investigation of Cooling Facilities Operations (Larry Walker Associates, 2008) [14] City of Manteca Wastewater Quality Control Facility Master Plan Update (Nolte Associates, 2007) [15] City of Manteca Thermal Plan Exception Analysis Final Report (Larry Walker Associates, 2006) [16] City of Manteca Wastewater Collection System Master Plan Update (Nolte Associates, 2006) [17] Manteca Wastewater Quality Control Facility Phase III Expansion Project – Basis of Design Report (Nolte Associates, 2001)
[18] Wastewater Treatment Plant Classification Brochure (SWRCB) [19] Operator Certification Requirements Table (SWRCB, 2013) [20] Northeast Guide for Estimating Staffing at Publicly and Privately Owned Wastewater Treatment Plants (New England Interstate Water Pollution Control Commission, November 2008) ATTACHMENT 2
APPENDIX A
City of Manteca 2020 Sewer System Management Plan
ATTACHMENT 2
City of Manteca
Sewer System Management Plan
8 January 2020
Prepared for
City of Manteca
1001 W. Center Street
Manteca, CA 95337
Prepared by
Kennedy/Jenks Consultants
10850 Gold Center Drive, Suite 350
Rancho Cordova, CA 95670
K/J Project No. 1970006.00
ATTACHMENT 2
Table of Contents
Abbreviations and Acronyms......................................................................................................iv Executive Summary .................................................................................................................... I Section 1: Introduction ................................................................................. 1
1.1 Regulatory Requirements..................................................................... 1
1.2 System Overview ................................................................................. 1
1.3 Objectives ............................................................................................ 3 Section 2: Organization................................................................................. 4
2.1 City Wastewater Collection System Organization................................. 4
2.2 Implementing, Managing and Updating the Sanitary Sewer Maintenance Plan ................................................................................ 6
2.3 Recommendations ............................................................................... 9
2.3.1 Staffing Workload Evaluation.................................................... 9 Section 3: Overflow Response Plan............................................................10
3.1 Sanitary Sewer Overflow History........................................................ 10
3.2 Recommendations ............................................................................. 11
3.2.1 Database Objective ................................................................ 11 Section 4: Fats, Oils and Grease Control Program.....................................12
4.1 Grease Blockages History.................................................................. 12
4.2 Source Control Measures................................................................... 12
4.3 Inspection of FOG-producing Facilities............................................... 12
4.4 Legal Authority to Prohibit Discharges................................................ 12
4.5 Public Education Outreach Program .................................................. 13 Section 5: Legal Authority ..........................................................................14
5.1 Prevent Illicit Discharges into the System........................................... 14
5.2 Control Infiltration/Inflow..................................................................... 14
5.3 Proper Design and Construction of New and Rehabilitated Sewer Connections ............................................................................ 15
5.4 Proper Installation, Testing, and Inspection of New and Rehabilitated Sewers ......................................................................... 15
5.5 Access for Maintenance, Inspection, or Repairs for Portion of City Owned Laterals........................................................................... 15
5.6 Limit the Discharge of Fats, Oils and Grease and Other Debris ......... 15
5.7 Enforcement of the City’s Sewer Ordinances ..................................... 15
5.8 Recommendations ............................................................................. 16
5.8.1 Inspection Services ................................................................ 16 ATTACHMENT 2
Section 6: Operations and Maintenance.....................................................17
6.1 Collection System Map....................................................................... 17
6.2 Resources and Budget....................................................................... 18
6.3 Prioritized Preventative Maintenance ................................................. 18
6.3.1 Scheduled Inspections and Condition Assessment................. 19
6.3.1.1 Pipeline Inspection and Maintenance .................... 19
6.3.1.2 Pump Station Inspection and Maintenance............ 19
6.3.1.3 Manhole Inspection and Maintenance ................... 20
6.3.1.4 Air Release Valves Inspection and
Maintenance.......................................................... 20
6.3.1.5 Other Key Collection System Component
Inspection and Maintenance.................................. 21
6.4 Contingency Equipment and Replacement Inventories ...................... 21
6.5 Training.............................................................................................. 21
6.6 Outreach to Plumbers and Building Contractors................................. 22
6.7 Corrective Maintenance ..................................................................... 22
6.8 Recommendations ............................................................................. 22
6.8.1 Capital Improvement Program Projects Prioritization.............. 22
6.8.2 Formal Inspection/Cleaning Procedures ................................. 23
6.8.3 Computerized Management and Maintenance System........... 24 Section 7: Design and Construction Standards..........................................25
7.1 Standards for Installation, Rehabilitation, and Repair of Sanitary Sewers............................................................................................... 25
7.2 Standards for Inspection and Testing for New and Rehabilitated Sanitary Sewer Facilities .................................................................... 25
7.3 Recommendations ............................................................................. 25
7.3.1 Sanitary Sewer Standards Update.......................................... 25
7.3.2 Inspection and Testing Standards........................................... 25 Section 8: Capacity Management ...............................................................26
8.1 Capacity Assessment......................................................................... 26
8.2 System Evaluation and Capacity Assurance Plan .............................. 26
8.3 Recommendations ............................................................................. 26
8.3.1 Implementation Schedule ....................................................... 26 Section 9: Monitoring, Measurement and Program Modifications .............27
9.1 Implementation and Effectiveness of the SSMP Elements ................. 27
9.2 Updating SSMP.................................................................................. 27
9.3 SSMP Audits...................................................................................... 27 Section 10: Outreach Communications Program .........................................29
10.1 Recommendations ............................................................................. 29
10.1.1 Public Outreach Communication Program.............................. 29 ATTACHMENT 2
Section 11: Sewer System Management Plan – Summary of
Recommendations.....................................................................30 References................................................................................................................................. 1 List of Tables
Table ES-1: Waste Discharge Requirements........................................................................... I Table ES-2: Summary of Recommendations .......................................................................... V Table 1-1: Summary of City of Manteca Wastewater Pump Stations.................................... 2 Table 3-1: Number of SSOs for 2007 – 2013 by Category ................................................. 10 Table 3-2: Summary of SSOs by Cause............................................................................. 10 Table 9-1: SSMP Audit and Update Schedule.................................................................... 28 Table 11-1: Summary of Recommendations ........................................................................ 30 List of Figures
Figure 1-1: Existing Sewer Collection System .......................................................Appendix D Figure 2-1: Sewer Overflows by Location..............................................................Appendix D Figure 2-2: City Staff Dedicated to Collection System Operation, Maintenance and Improvements ......................................................................... 4 Figure 2-3: City of Manteca Organizational Chart for Implementing, Managing and Updating the SSMP ..................................................................... 6 List of Appendices
A Sanitary Sewer Overflow Response Plan
B City Ordinance
C Sample Documentation
D Figures
E Manteca SSMP Program Audit
F Glossary of Terms
ATTACHMENT 2
Abbreviations and Acronyms
ARV air release valves
AVRV air/vacuum release valve
BMP best management practices
CCTV closed circuit television
CIP Capital Improvement Plan or Capital Improvement Program CIPP Capital Improvement Projects Plan
City City of Manteca
CIWQS California Integrated Water Quality System
CMMS Computerized Management and Maintenance System
CWEA California Water Environment Association
DEH Department of Environmental Health
FOG fats, oils and grease
FTE full-time equivalent
gal gallon
GIS Geographic Information System
gpm gallons per minute
HAZMAT hazardous materials
hp horse power
I/I infiltration and inflow
mgd million gallons per day
MRP Monitoring and Reporting Program
MS4 Municipal Separate Storm Sewer System
NPDES National Pollutant Discharge Elimination System
O&M operation and maintenance
OES Office of Emergency Services
OSHA Occupational Safety and Health Administration
PFIP Public Facilities Implementation Plan
PLSD private lateral sewage discharge
PM preventative maintenance
RWQCB Regional Water Quality Control Board
SCADA supervisory control and data acquisition
SSMP Sewer System Management Plan
ATTACHMENT 2
SSO sanitary sewer overflow
SSORP Sanitary Sewer Overflow Response Plan
SWRCB State Water Resources Control Board
TV television
U.S. United States
URPS Union Road Pump Station
VFD variable frequency drive
WDR Waste Discharge Requirement
WQCF Wastewater Quality Control Facility
ATTACHMENT 2
Executive Summary
The City of Manteca (City) is currently operating under Waste Discharge Requirement (WDR) Order No. R5-2009-0095 and National Pollutant Discharge Elimination System (NPDES) Permit CA0081558. Special Provision VII.B.5.c of this WDR/NPDES requires the City to submit a Sewer System Management Plan (SSMP). The State Water Resources Control Board (SWRCB) has developed a statewide general WDR whose provisions also require all publiclyowned wastewater dischargers with a collection system greater than one-mile in length develop a SSMP. As the SWRCB adopted the new statewide general WDR in May 2006, this SSMP has been prepared in accordance with the SWRCB WDRs.
Table ES-1 below summarizes where the specific SWRCB WDRs are addressed in the following sections of this SSMP report.
Table ES-1: Waste Discharge Requirements
WDR
Section WDR Description
SSMP
Section
D.13.ii.a The name of the responsible or authorized representative as described in Section J of this Order. 2.2
D.13.ii.b
The names and telephone numbers for management, administrative, and maintenance positions responsible for implementing specific measures in the SSMP program. The SSMP must identify lines of authority through an organization chart or similar document with a narrative explanation; and Attachment V
of Appendix A
& Figure 2-2
in Section 2.2
D.13.ii.c
The chain of communication for reporting sanitary sewer overflows (SSOs), from receipt of a complaint or other information, including the person responsible for reporting SSOs to the State and Regional Water Board and other agencies if applicable (such as County Health Officer, County Environmental Health Agency, Regional Water Board, and/or State Office of Emergency Services [OES]).
Figure 1 in
Appendix A
D.13.iii.a
Prevent illicit discharges into its sanitary sewer system (examples may include infiltration and inflow [I/I], stormwater, chemical dumping, unauthorized debris and cut roots, etc.);
5.1 D.13.iii.b Require that sewers and connections be properly designed and constructed; 5.3 D.13.iii.c Ensure access for maintenance, inspection, or repairs for portions of the lateral owned or maintained by the Public Agency; 5.5
D.13.iii.d Limit the discharge of fats, oils, and grease and other debris that may cause blockages, and 5.6
D.13.iii.e Enforce any violation of its sewer ordinances. 5.7 D.13.iv.a
Maintain an up-to-date map of the sanitary sewer system, showing all gravity line segments and manholes, pumping facilities, pressure pipes and valves, and applicable stormwater conveyance facilities;
6.1 ATTACHMENT 2
WDR
Section WDR Description
SSMP
Section
D.13.iv.b
Describe routine preventive operation and maintenance (O&M) activities by staff and contractors, including a system for scheduling regular maintenance and cleaning of the sanitary sewer system with more frequent cleaning and maintenance targeted at known problem areas. The preventative maintenance (PM) program should have a system to document scheduled and conducted activities, such as work orders;
6.3 D.13.iv.c
Develop a rehabilitation and replacement plan to identify and prioritize system deficiencies and implement short-term and long-term rehabilitation actions to address each deficiency. The program should include regular visual and television (TV) inspections of manholes and sewer pipes, and a system for ranking the condition of sewer pipes and scheduling rehabilitation. Rehabilitation and replacement should focus on sewer pipes that are at risk of collapse or prone to more frequent blockages due to pipe defects. Finally, the rehabilitation and replacement plan should include a capital improvement plan (CIP) that addresses proper management and protection of the infrastructure assets. The plan shall include a time schedule for implementing the short- and long-term plans plus a schedule for developing the funds needed for the CIP
6.8 D.13.iv.d Provide training on a regular basis for staff in sanitary sewer system O&M, and require contractors to be appropriately trained; and 6.5 & 6.6 D.13.iv.e Provide equipment and replacement part inventories, including identification of critical replacement parts. 6.4
D.13.v.a
Design and construction standards and specifications for the installation of new sanitary sewer systems, pump stations and other appurtenances; and for the rehabilitation and repair of existing sanitary sewer systems; and
7.1 D.13.v.b
Procedures and standards for inspecting and testing the installation of new sewers, pumps, and other appurtenances and for rehabilitation and repair projects.
7.2 D.13.vi.a Proper notification procedures so that the primary responders and regulatory agencies are informed of all SSOs in a timely manner; Appendix A D.13.vi.b A program to ensure an appropriate response to all overflows; Appendix A D.13.vi.c
Procedures to ensure prompt notification to appropriate regulatory agencies and other potentially affected entities (e.g., health agencies, Regional Water Boards, water suppliers, etc.) of all SSOs that potentially affect public health or reach the waters of the State in accordance with the Monitoring and Reporting Program (MRP). All SSOs shall be reported in accordance with this MRP, the California Water Code, other State Law, and other applicable Regional Water Board WDRs or NPDES permit requirements. The SSMP should identify the officials who will receive immediate notification;
Appendix A
D.13.vi.d Procedures to ensure that appropriate staff and contractor personnel are aware of and follow the Emergency Response Plan and are appropriately trained;
6.5 &
Appendix A
D.13.vi.e Procedures to address emergency operations, such as traffic and crowd control and other necessary response activities; and Appendix A ATTACHMENT 2
WDR
Section WDR Description
SSMP
Section
D.13.vi.f
A program to ensure that all reasonable steps are taken to contain and prevent the discharge of untreated and partially treated wastewater to waters of the United States (U.S.) and to minimize or correct any adverse impact on the environment resulting from the SSOs, including such accelerated or additional monitoring as may be necessary to determine the nature and impact of the discharge.
Appendix A
D.13.vii.a An implementation plan and schedule for a public education outreach program that promotes proper disposal of fats, oils and grease (FOG);
4.5 D.13.vii.b
A plan and schedule for the disposal of FOG generated within the sanitary sewer system service area. This may include a list of acceptable disposal facilities and/or additional facilities needed to adequately dispose of FOG generated within a sanitary sewer system service area;
4.2 D.13.vii.c The legal authority to prohibit discharges to the system and identify measures to prevent SSOs and blockages caused by FOG; 4.4
D.13.vii.d
Requirements to install grease removal devices (such as traps or interceptors), design standards for the removal devices, maintenance requirements, Best Management Practices (BMP) requirements, record keeping and reporting requirements;
4.2 D.13.vii.e
Authority to inspect grease producing facilities, enforcement authorities, and whether the Enrollee has sufficient staff to inspect and enforce the FOG ordinance;
4.3 D.13.vii.f An identification of sanitary sewer system sections subject to FOG blockages and establishment of a cleaning maintenance schedule for each section; and 4.1 D.13.vii.g
Development and implementation of source control measures for all sources of FOG discharged to the sanitary sewer system for each section identified in (f) above.
4.2 D.13.viii.a
Evaluation: Actions needed to evaluate those portions of the sanitary sewer system that are experiencing or contributing to an SSO discharge caused by hydraulic deficiency. The evaluation must provide estimates of peak flows (including flows from SSOs that escape from the system) associated with conditions similar to those causing overflow events, estimates of the capacity of key system components, hydraulic deficiencies (including components of the system with limiting capacity) and the major sources that contribute to the peak flows associated with overflow events;
Section 8
D.13.viii.b Design Criteria: Where design criteria do not exist or are deficient, undertake the evaluation identified in (a) above to establish appropriate design criteria; and Section 8 and
7.1 D.13.viii.c
Capacity Enhancement Measures: The steps needed to establish a short- and long-term CIP to address identified hydraulic deficiencies, including prioritization, alternatives analysis, and schedules. The CIP may include increases in pipe size, I/I reduction programs, increases and redundancy in pumping capacity, and storage facilities. The CIP shall include an implementation schedule and shall identify sources of funding.
Section 8 &
6.8 D.13.viii.d
Schedule: The Enrollee shall develop a schedule of completion dates for all portions of the capital improvement program (CIP) developed in (a)-(c) above.
This schedule shall be reviewed and updated consistent with the SSMP review and update requirements as described in Section D. 14.
6.8 ATTACHMENT 2
WDR
Section WDR Description
SSMP
Section
D.13.ix.a Maintain relevant information that can be used to establish and prioritize appropriate SSMP activities; 9.1
D.13.ix.b Monitor the implementation and, where appropriate, measure the effectiveness of each element of the SSMP; 9.1
D.13.ix.c Assess the success of the PM program; 9.3
D.13.ix.d Update program elements, as appropriate, based on monitoring or performance evaluations; and 9.2
D.13.ix.e
Identify and illustrate SSO trends, including: frequency, location, and volume. Appendix E and
Figure 2-1
D.13.x
As part of the SSMP, the Enrollee shall conduct periodic internal audits, appropriate to the size of the system and the number of SSOs. At a minimum, these audits must occur every two years and a report must be prepared and kept on file. This audit shall focus on evaluating the effectiveness of the SSMP and the Enrollee’s compliance with the SSMP requirements identified in this subsection (D.13), including identification of any deficiencies in the SSMP and steps to correct them.
9.3 D.13.xi
The Enrollee shall communicate on a regular basis with the public on the development, implementation, and performance of its SSMP. The communication system shall provide the public the opportunity to provide input to the Enrollee as the program is developed and implemented. The Enrollee shall also create a plan of communication with systems that are tributary and/or satellite to the Enrollee’s sanitary sewer system.
10.1.1 ATTACHMENT 2
The City’s current O&M procedures are largely informal with minimal written procedures and documentation. Throughout this document recommendations will be made for the City to formalize their programs with references of examples in Appendix C. A summary of the recommendations made in the 2006 and 2014 SSMP are listed below with an update as to whether the recommendation is still warranted for this 2019 SSMP. For the recommendations that are still warranted they are further described throughout the SSMP.
Table ES-2: Summary of Recommendations
2006 Recommendation 2014 SSMP Update 2019 SSMP Update SSMP Section Staffing Workload
Evaluation
Recommendation is still
warranted as staffing will need
to be continually evaluated with
changes in organization
structure, population growth in
the City and maintenance
activities.
Recommendation is still
warranted as staffing will need to
be continually evaluated with
changes in organization
structure, population growth in
the City and maintenance
activities.
2.3.1 Tracking and Recording
SSOs
The City is recording and
tracking their SSOs; therefore,
this recommendation is no
longer warranted.
N/A
Reporting The City is currently reporting
their SSOs per the SWRCB
WDR requirements; therefore,
this recommendation is no
longer warranted.
N/A
Database Objective Recommendation is still
warranted as the City is initiating
the use of the Computerized
Management and Maintenance
System (CMMS) and will be
populating with data in order to
assist the objectives described
in the recommendation.
Recommendation is still
warranted; the City has
completed transferring collection
system data from AutoCAD to
Geographic Information System
(GIS), and the data will be used
to meet the objectives described.
3.2.1 6.1
FOG Program The City updated and adopted
the Industrial Waste Ordinance,
which includes FOG Control
component; therefore, the
recommendation has been
fulfilled and no longer warranted.
N/A
Pollutant Requirements The City recently updated their
Industrial Waste Ordinance;
therefore, the recommendation
is no longer warranted.
N/A
ATTACHMENT 2
2006 Recommendation 2014 SSMP Update 2019 SSMP Update SSMP Section Inspection Services Recommendation is still
warranted as the City should
review and consider the CCTV
and inspection of installed sewer
mains and laterals prior to the
one year warranty period
expiring.
Recommendation is still
warranted as the City should
review and consider the CCTV
and inspection of installed sewer
mains and laterals prior to the
one-year warranty period
expiring.
5.8.2 Ownership of Laterals The City is in the process of clarifying ownership of laterals.
For now, the current policy
remains in place.
The City should continue to
collect data on lateral SSOs to
determine if they are a significant
source of total SSOs in the City
and which are caused by private
property owners.
Appendix G
Collection System Map The City has completed the
transfer of collection system
components from AutoCAD to
Geographic Information System
(GIS) and has begun the
integration process with other
City owned utilities. The City is
commencing the next phase of
integrating the mapping with the
CMMS.
The City has completed the
transfer of collection system
components from AutoCAD to
Geographic Information System
(GIS) and has begun the
integration process with other
City owned utilities. The City has
integrated the mapping with the
CMMS, which is used to
generate reports on asset
performance and identify hot
spot locations.
6.1 Updating As-Builts The City has a procedure in
place for updating collection
system mapping; therefore, this
recommendation is no longer
warranted.
N/A
Wastewater Collection
System Asset Identification
As part of the conversion into
GIS mapping the City has
assigned a unique identifier to
each collection system sewer
asset; therefore, this
recommendation is no longer
warranted.
N/A
CIP Prioritization Recommendation is still
warranted.
Recommendation is still
warranted.
6.8.1 Updated Rate Study The City performed an updated
rate study in 2008; therefore,
this recommendation is no
longer warranted.
The next rate study is not
anticipated for another two years.
N/A
Formal Inspection/Cleaning
Procedures
Recommendation is still
warranted.
Recommendation is still
warranted.
6.8.2 ATTACHMENT 2
2006 Recommendation 2014 SSMP Update 2019 SSMP Update SSMP Section CMMS Recommendation is still
warranted.
The City is utilizing CMM as
recommended, however, as not
all assets have been entered,
this recommendation is still
warranted.
6.8.3 Condition Assessment
Program
Recommendation is still
warranted.
The City now performs their own
CCTV inspections following
PACP coding guidelines.
Therefore, this recommendation
is no longer warranted.
N/A
Contingency Equipment
and Replacement
Inventories
The City keeps on hand the
necessary contingency
equipment and has their process
in place for replacement
inventories; therefore, this
recommendation is no longer
warranted.
N/A
Training The City keeps track of training
attendance by date and topic
covered for internal training or
on the job training.
Documentation is also kept on
file for attendance to California
Water Environment Association
(CWEA) or other professional
training. The current training
program meets their needs,
therefore, the recommendation
is no longer warranted.
N/A
Plumbers and Contractors
Outreach Program
Recommendation is no longer
warranted as the number of
SSOs attributed to
construction/contractor is
minimal.
N/A
Sanitary Sewer Standards
Update
Recommendation is still
warranted.
Recommendation is still
warranted.
7.3.1 Inspection and Testing
Standards
Recommendation is still
warranted.
Recommendation is still
warranted.
7.3.2 Implementation Schedule Recommendation is still
warranted.
Recommendation is still
warranted.
8.3.1 SSMP Monitoring This recommendation is
addressed within the SSMP
Audit Template, therefor, this
recommendation is no longer
warranted.
N/A
ATTACHMENT 2
2006 Recommendation 2014 SSMP Update 2019 SSMP Update SSMP Section Audit Report This recommendation is
addressed within the SSMP
Audit Template; therefore, this
recommendation is no longer
warranted.
N/A
Public Outreach
Communication Program
Recommendation is still
warranted as the City will need
to continually evaluate the
effectiveness of its outreach
program/activities.
Recommendation is still
warranted as the City will need to
continually evaluate the
effectiveness of its outreach
program/activities.
10.1.1 ATTACHMENT 2
Section 1: Introduction
The purpose of the Sewer System Management Plan (SSMP) is to describe the actions that will prevent and/or minimize sanitary sewer overflows (SSOs). The City is also completing the SSMP in order to comply with State Water Resources Control Board (SWRCB) Waste Discharge Requirement (WDR) Order No. 2006-0003-DWQ.
A SSO is any overflow, spill, release, discharge or diversion of untreated sewage from a sanitary sewer system. SSOs often contain high levels of suspended solid, pathogenic organisms, toxic pollutants, nutrients, oxygen demanding organic compounds, oil and grease and other pollutants. SSOs may cause a nuisance, a temporary exceedance of water quality standards when the sewage is discharged to surface waters of the United States (U.S.), pose a threat to the public health, adversely affect aquatic life and impair the public recreational use and aesthetic enjoyment of surface waters (SWRCB).
1.1 Regulatory Requirements
As California’s wastewater collection system begins to age, the need to proactively manage this valuable asset becomes increasingly important. Collection systems are the most recent major component of the wastewater management system to be regulated. On May 2, 2006 the SWRCB adopted Order No. 2006-0003, Statewide General WDRs for Sanitary Sewer Systems.
The primary objectives of the WDR being 1) to initiate a proactive approach among public entities to ensure the development of system wide operation, maintenance and management plans to reduce SSOs thereby reducing impacts to the State’s water bodies and protecting public health and 2) to establish an enforceable regulation that allows the SWRCB to gather consistent data on causes and sources of SSOs. Under the WDR, all public entities that own or operate sanitary sewer systems greater than one mile in length that collect and/or convey untreated or partially untreated wastewater to a publicly owned treatment facility in the State of California are required to comply with these requirements. Another component of the WDR is the Monitoring and Reporting Program (MRP) that includes specific SSO notification, reporting and record keeping requirements to meet SSO reporting requirements in the Water Code and facilitate compliance monitoring and enforcement for violations. On August 6, 2013 the SWRCB adopted Amending MRP Order No. WQ 2013-0058-EXEC, which became effective September 9, 2013 and rescinded MRP Order 2008-0002-EXEC. This report incorporates the requirements of SWRCB WQ 2013-0058-EXEC.
1.2 System Overview
The City’s Wastewater Quality Control Facility (i.e., WQCF or Wastewater Treatment Plant) serves the City of Manteca, City of Lathrop, and Raymus Village in San Joaquin County. The City provides wastewater service through approximately 19,500 connections to a population of approximately 81,345 (City of Manteca, General Plan Update, 2018). There are an estimated 225 miles of sewer trunk lines and 110 miles of local laterals in the sewer collection system. The WQCF currently treats 6.5 million gallons per day (mgd) of wastewater, and has been rated with a capacity of approximately 9.8 mgd. A plant expansion to 9.8 mgd was completed in 2007 (City of Manteca website).
ATTACHMENT 2
The existing sewer collection system consists of 6- to 36-inch-diameter gravity flow pipelines, 6- to 24-inch-diameter force mains, and 16 wastewater pump stations. A summary of the City’s wastewater pump stations is shown in Table 1-1.
Table 1-1: Summary of City of Manteca Wastewater Pump Stations Pump Information
Wastewater
Pump Station
Name
Description of
Approximate Location
No.
of
Pumps Manufacturer
Horsepower
(hp)
Design Flow
(gpm)
Design Head
(feet)
Union Road Union Road and Center
Street
1 2
Fairbanks Morse
Worthington
25 50
3,500
7,000
19 19
Robert Estates Airport Way and Wawona
Street
2 Flygt 3 200 13
Fishback Yosemite Avenue and
Fishback Road
2 Flygt 3 100 14
Chadwick Unit 5 Airport Way and Geneva
Way
2 Flygt 10 875 24
Frito Lay Spreckels Avenue and
Moffat Blvd.
2 Flygt 3 200 48
Curran Grove Norman Drive and Dyer
Avenue
2 Flygt 3 140 18
Villa Ticino Airport Way and Northgate
Drive
2 Flygt 7.5 510 23
Woodward Park Woodward Avenue and
Buena Vista Drive
2 Flygt 10 550 63
Bella Vista Woodward Avenue and
Bella Terra Drive
2 Flygt 20 600 58
Eckert Cold
Storage
Moffat Blvd. near South
Powers Avenue
2 Flygt 20 750 51
Antigua Pagola Avenue and
Woodard Avenue
2 Flygt 10 193 53
Tara Park McKinley Avenue and
Woodward Avenue
2 Cornell 25 NOT IN
SERVICE
NOT IN
SERVICE
Woodbridge Daisywood Drive and Airport
Way
2 Flygt 30 1,450 50
Solera
(TEMPORARY)
Mirassou Drive and Pillsbury
Road
2 Flygt 10 Not Available Not Available
Evans Estates
(TEMPORARY)
Main Street south of Legacy
Street
2 Flygt 25 Not Available Not Available
South Trunk
(TEMPORARY)
Woodward Ave and Galleria 1 Flygt 10 Not Available Not Available Source: Table 3-1 City of Manteca Wastewater Collection System Master Plan Update (Nolte, 2005) ATTACHMENT 2
The majority of the collection system serves the core of the City (Central Trunk Sewer Shed or Central Shed), approximately bound by SR-120, Austin Road, Union Road, and Lathrop Road.
Subdivisions located on the perimeter or beyond the Central Shed have installed temporary wastewater pump stations. These pump stations have been decommissioned and these subdivisions are connected to gravity trunk sewers. Within the Central Shed, the majority of the collection system flows by gravity to the Union Road Pump Station (URPS). Downstream of the URPS, wastewater flows to the WQCF by gravity via a 36-inch diameter sewer. A map of the existing sewer collection system showing gravity sewers 6-inch and larger is provided in Appendix D as Figure 1-1 Existing Collection System.
City personnel perform regular maintenance on the collection system and wastewater pumping stations. Regular maintenance activities include:
• Clearing blockages due to solids and grease buildup with high pressure jetting and vacuuming equipment;
• Inspection of the system with closed circuit television (CCTV) and removing floating material and submerged debris from wastewater pump stations to mitigate the potential for pump and vacuum/air-release valve fowling and failures; and • Routine valves exercising to maintain and ensure valve function.
Problems detected in the system are recorded and corrective actions are taken when warranted.
1.3 Objectives
The objective of the SSMP is to provide a plan and schedule to properly manage, operate and maintain all parts of the wastewater collection system and to:
● Eliminate preventable SSOs
● Protect public health and safety
● Minimize adverse impacts of SSOs
● Prevent adverse impacts to the environment, waterways of the U.S., and their beneficial uses
● Ensure corrective action is taken in a timely manner
● Ensure compliance with current regulatory requirements ● Document and define procedures to address SSO prevention and response ATTACHMENT 2
Section 2: Organization
2.1 City Wastewater Collection System Organization
The City’s wastewater collection system staff consists of maintenance workers, supervisors, administrative staff and engineering. A summary of the City staff time dedicated to the operation, maintenance and improvement of the wastewater collection system is shown in Figure 2-1 in Appendix D. There are eight maintenance workers operating a modified five days per week schedule. On average two maintenance workers dedicate 35 hours per week to the collection system, two maintenance workers spends about 36 hours per week on the wastewater pump stations and vacuum/air-release valves, two maintenance workers performing preventative and corrective maintenance, and the seventh maintenance worker spends about 36 hours per week on service lateral installation/repairs and customer service calls. The Lead Was System Worker spends about 30 hours per week coordinating and recording work activity. The remainder of the time these maintenance workers are working at the WQCF or conducting storm drain system maintenance. Two supervisory positions: WQCF Superintendent, which on average dedicates 1 to 2 hours per week to the collection system, and Collection System Supervisor, which on average dedicates 30 hours per week to the collection system, are both assigned to manage, operate and maintain the wastewater collection system. The collection system crew is responsible for gravity and force main sewers, pump stations and storm water system maintenance. The system is monitored twenty-four hours a day either by staff during regular hours or by the WQCF operator on duty during evenings, nights, and weekends using a supervisory control and data acquisition (SCADA) system to monitor wastewater pump station operation. An equivalent of 0.5 FTE Engineering staff have been hired with duties related to the collection system.
ATTACHMENT 2
Figure 2-2: City Staff Dedicated to Collection System Operation, Maintenance and Improvements
In 2017, two field crew were hired to perform routine CCTV inspections on a full-time basis. The engineering staff dedicated to the wastewater collection system includes one senior engineer with support from one engineering technician in the Public Works Department and the City’s Public Works Director and Deputy Public Works Director. The administrative assistant at the WQCF handles all of the administrative duties for the twenty-seven employees that maintain and work at both the WQCF and collection system. The administrative assistant answers all incoming calls for the staff including customer complaints, routes them to the appropriate individual and inputs data into the Computerized Management and Maintenance System (CMMS) database. The City over the last five years on average has dedicated about 1.2 engineering staff years to planning, managing and improving the wastewater collection system.
Based on review of system performance, the City seems to have the proper organizational staff in place for proper maintenance and response to collection system problems. The administrative assistant at the WQCF may need additional support should the workload or additional duties be redistributed. This is further detailed in Section 2.3.1 Staffing Workload Evaluation. 180
72 30 30
2 10 10 4 4 10 10
0 20
40 60
80 100
120
140
160
180
200
Maintenance
Worker II
Maintenance
Worker III
Lead Wastewater
System Worker
Collection System
Supervisor
WQCF
Superintendent
Senior Engineer
Engineering
Technician
Hours per Week
City Staff Dedicated to Collection System
Hours per Week Dedicated to
the Collection System
Hours per Week Dedicated to
Other Duties
ATTACHMENT 2
2.2 Implementing, Managing and Updating the Sanitary Sewer Maintenance Plan
The City’s formal organizational chart showing staff responsibility for implementing, managing and updating the SSMP is shown in Figure 2-2 City of Manteca Organizational Chart for Implementing, Managing and Updating the SSMP. The authorized representative for the City is Heather Grove.
The collection system staff responsible for implementing, managing and updating the SSMP includes: The WQCF Superintendent and Collection System Supervisor, with contribution from the Lead Collection System Worker and maintenance workers. Responsibilities of the wastewater collection system staff are:
Senior Engineer – Plan, coordinate and manage public works construction, alteration and installation projects; perform a variety of professional engineering duties in the planning, design, contracting, budgeting, bidding and analysis of assigned projects; and train and provide work direction and guidance to assigned personnel.
WQCF Superintendent – Plan, organize and direct the laboratory, operations and activities related to the maintenance and repair of City wastewater and storm water systems, facilities and related equipment; coordinate and manage the development and implementation of Department guidelines and procedures to assure compliance with established local, State and federal laws, codes and regulations; and train and evaluate the performance of assigned personnel.
Maintenance Supervisor – Under the direction of the WQCF Superintendent, organize and direct operations and activities related to the maintenance and repair of WQCF facilities and related equipment; provide adequate scheduling, supplies and equipment to assure smooth and efficient system operations; and train and provide work direction to assigned personnel.
ATTACHMENT 2
ATTACHMENT 2
Figure 2-3: City of Manteca Organizational Chart for Implementing, Managing and Updating the SSMP
Collection System Supervisor – Under the direction of the WQCF Superintendent, organize and direct the maintenance and repair activities of the wastewater treatment facility and/or wastewater and storm water conveyance systems. Plan, organize and direct assigned staff performing skilled work in the maintenance and repair of the sewer collection and storm water pumping systems, ensure that all work performed is done in compliance with proper procedures provide adequate scheduling, supplies and equipment to assure smooth and efficient system operations; and train assigned personnel. Oversee and ensure that the CMMS is functioning properly and that all necessary records, readings and reports are complete, organized and up to date.
Utilities Mechanic – Under the direction of the Maintenance Supervisor, perform skilled work in the maintenance and repair of wastewater and storm water facilities. Troubleshoot and repair wastewater and storm water facilities, including motor, pumps and blowers.
Lead Wastewater Worker – Under the direction of the Collection System Supervisor, lead and participate in a variety of skilled work in the installation, maintenance and inspection of City sewer lines and laterals, storm drains, and the WQCF; inspect and assess pipelines using PACP; operate a variety of light and heavy maintenance and construction equipment; and train and provide work direction to assigned staff.
Wastewater Worker III – Under the direction of the Collection System Supervisor, participate in a variety of skilled work in the installation, maintenance, and inspection of City sewer lines and laterals, storm drains, and the WQCF; inspect and assess pipelines using PACP; operate a variety of light and heavy maintenance and construction equipment; and train and provide work direction to assigned staff.
Wastewater Worker II – Under the direction of the Collection System Supervisor, perform a variety of skilled duties in the maintenance and repair of City wastewater and storm water systems, facilities and related equipment; and operate a variety of power-driven and heavy equipment to perform assigned duties.
Wastewater Worker I – Under the direction of the Collection System Supervisor, perform a variety of duties in the maintenance and repair of City wastewater and storm water systems, facilities and related equipment; and operate a variety of power-driven and heavy equipment to perform assigned duties.
Instrumentation/Electrician – Under the direction of the Maintenance Supervisor, performs skilled work in the maintenance, repair and calibration of electrical systems, equipment, appurtenances, instrumentation and controls related to the wastewater treatment facility and/or wastewater and storm water conveyance systems.
Permit Compliance Coordinator – Administers the Fats, Oils and Grease (FOG) program.
Environmental Compliance Inspector – Implements the FOG program.
ATTACHMENT 2
Also, Figure 1 in Appendix A - City of Manteca SSO Response Field and Reporting Procedures flowchart illustrates the organizational chart for SSO response and reporting. For a full description of the SSO Response Plan see Appendix A.
2.3 Recommendations
The following recommendation for organization of the wastewater collection system staff is based on the evaluation of the City’s current full time equivalent staff and the time spent servicing and maintaining the collection system.
2.3.1 Staffing Workload Evaluation
The City wastewater collection system is divided up into three different sewer sheds per the Wastewater Collection System Master Plan Update and as shown on Figure 2-3 in Appendix D as follows:
Central Trunk Sewer Shed (Central Shed)
North Trunk Sewer Shed (North Shed)
South Trunk Sewer Shed (South Shed)
The Central Shed serves the majority of the City with the other areas serving newer developed areas that surrounds the central area of the City. The Central Trunk Sewer Shed (Central Shed) is predominantly where the City historically spends most of their resources responding to sewer spills and maintenance requests (e.g., grease blockages, etc.). The estimate is about 80% of the resources are used in the Central Shed to operate and maintain the system.
Considering the City currently has eight full-time equivalent (FTE) staff dedicated to the collection system and eighty percent (80%) of the City’s resources are used to maintain the Central Shed, 4.8 FTEs are assigned to service and maintain the central sewer shed and 1.2 FTEs to maintain the remainder of the collection system. In addition to the FTE staff evaluation for maintenance of the collection system, 0.8 FTE of administrative staff is used to support the Central Shed and 0.2 FTE the two other sheds.
In Sections 9 and 10 it is stated that this SSMP should be updated every five years and audited every two years. The City will use the information developed in this section to evaluate future FTE needs and distribution among the different sewer sheds as the system ages and improvements are made per the Wastewater Collection System Master Plan Update.
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Section 3: Overflow Response Plan
3.1 Sanitary Sewer Overflow History
The causes of SSOs are specific to each system, some of the principal causes of SSOs include:
grease blockages, root blockages, sewer line flood damage, manhole structure failures, vandalism, pump station mechanical failures, power outages, storm or ground water inflow/infiltration, debris blockages, sanitary sewer system age and construction material failures, lack of proper operation and maintenance (O&M), lack of capacity and contractor caused damages (reference: SWRCB).
SSOs have been categorized by the SWRCB WDR in the MRP as category 1, category 2, category 3, and private lateral sewage discharge (PLSD). The definition of these are described in Appendix A – SSO Response Plan.
The City has reported one category 1 and one category 2 SSO from 2014 – 2018 to the Regional Water Quality Control Board (RWQCB). A summary of the number of SSOs by category is shown in Table 3-1, and are shown by location in Figure 2-3 in Appendix D.
Table 3-1: Number of SSOs for 2014 – 2018 by Category
Year
Category
1 Category
2 Category
3 Total
SSOs
Total Spill
Volume
(gal)
Total
Recovered
(gal)
Total Volume to
Reach Surface
Waters
(gal)
2014 0 0 13 13 2,204 2,204 -
2015 0 0 4 4 474 474 -
2016 0 0 9 9 773 773 -
2017 1 0 4 5 420,615 2,615 41,800
2018 0 1 4 5 52,791 52,791 -
Total 1 1 34 36 476,857 58,857 41,800
A summary of the SSO by cause is shown below in Table 3-2.
Table 3-2: Summary of SSOs by Cause
Cause
Number of
SSOs
(2007 – 2013)
Number of
SSOs
(2014 – 2018)
Grease 14 19
Roots 11 6
Debris 68 8
Pump Station Failure 0 0
Pipe Structural Problem/Failure 4 2
Construction/Contractor 1 0
Other 8 0
Total 106 36
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The cause for the Category 1 spill was a ruptured force main and the cause of the Category 2 spill was a pipe structural problem/failure on a gravity pipeline.
The main cause of the SSOs was attributed to grease. The City maintains a database with all service requests logs, which include a section for priority code, location, problem and resolution.
Additionally, photos and additional documents can be attached to the work order.
An SSO Response Plan is enclosed as Appendix A of this report.
3.2 Recommendations
The following recommendation for the City’s SSO Response Plan are based on an evaluation of the City’s current procedures of tracking, recording and reporting of SSOs. Modify the database configuration to accommodate a variety of identifiers that would be assigned to each spill to record and analyze the causes of the spills.
3.2.1 Database Objective
The database described in Section 6.1 should be used as a basis for prevention, monitoring for compliance, improvements to be made in the system, equipment needs and crew performance.
The purpose of the database is to:
● Serve as a records retention system.
● To provide regular reports on training, maintenance, spill responses. ● Provide input into fiscal management of the sewer collection system.
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Section 4: Fats, Oils and Grease Control Program
4.1 Grease Blockages History
A review of the reported SSOs was conducted to determine the number of SSOs and their locations. Of the 36 SSOs reported from 2014 – 2018, nineteen (19) were identified as being associated with grease blockage or grease buildup.
4.2 Source Control Measures
The City has an Industrial Waste Ordinance in place that has been reviewed and approved by the RWQCB, which includes Section 13.20.110 – FOG Control. The City’s Industrial Waste Ordinance, Chapter 13.20 describes the City’s Industrial Pretreatment Program. The purpose of the pretreatment program is to control and regulate the discharge of industrial and hazardous waste into the collection system. Chapter 13.20 contains the following pertinent subchapters to facilitate the City with the adequate mechanisms to establish pretreatment requirements for any discharger to the City’s wastewater collection system:
● Authority and Responsibility,
● Standards and Limitations,
● Administration,
● Reporting Requirements,
● Inspection and Monitoring,
● Confidentiality,
● Enforcement,
● Hearings and Appeals,
● FOG Control, and
● Severability
4.3 Inspection of FOG-producing Facilities
The City ensures adequate authority to inspect the premises of any person discharging waste to the collection system through Section 13.20.030 Authority and Responsibility of the City’s Municipal Code. Also, the City has added an Environmental Inspector to enforce compliance.
4.4 Legal Authority to Prohibit Discharges
The City has set forth adequate prohibitions and limitations for industrial waste discharge or discharge of concern into the collection system, which can be found in Section 13.20.040 Standards and Limitations of the Municipal Code.
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4.5 Public Education Outreach Program
The City has developed brochures to educate the public about the City’s FOG Control Program, and Collections Staff also carry pamphlets for distribution. The City is also in the process of developing its Commercial FOG Control Program and has already begun outreach to restaurants and mechanics shops through Environmental Compliance. It is anticipated that the Commercial FOG Control Program will help the City reduce the number of SSOs due to FOG.
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Section 5: Legal Authority
The City’s legal jurisdiction is defined by its Municipal Code; specifically Title 13 Public Services and Title 15 Buildings and Construction. The chapters in the Municipal Code that have been reviewed and which provide adequate legal authority for the City to construct, finance, own, manage, operate and maintain a wastewater collection system are:
● 13.12 – Sewer Connection Charges
● 13.14 – Sewer Capacity Charges
● 13.16 – Sewer Service Charges
● 13.20 – Industrial Waste
● 13.24 – Septic Tank Cleaning
● 13.38 – Public Facilities Implementation Program Fees ● 15.12 – Plumbing Code
These sections of the Municipal Code can be found in Appendix B. The Industrial Pretreatment Program is covered under Section 13.20
5.1 Prevent Illicit Discharges into the System
The City has set forth adequate prohibitions and limitations for illicit waste discharge into the collection system in the following City Municipal Code:
Chapter 13.20 Industrial Waste
● Section 13.20.030.A.11 – Authority and Responsibility ● Section 13.20.040.C & D – Standards and Limitations
● Section 13.20.050.B.3.e – Administration
● Section 13.20.090.A.3, A.6.a & C - Enforcement
Chapter 13.24 – Septic Tank Cleaning
● Section 13.24.050 – Permit-Suspension-Revocation
Also the City has an Industrial Pretreatment Program, which contains the Industrial User Waste Discharge Permit Template, Industrial User Inventory, Enforcement Response Guide, Pretreatment Program Resources and Organization, Adopted Industrial Waste Ordinance and Multi-jurisdictional Agreement between the City of Lathrop and the City.
5.2 Control Infiltration/Inflow
According to City maintenance staff the collection system does not experience major problems related to infiltration and inflow (I/I). I/I experienced by the City is considered to be normal resulting in increased flows to the WQCF.
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Currently the City has legal authority to control I/I into its collection system in accordance with Chapter 13.20 of the City’s Municipal Code. Stormwater and other illicit discharges as described in Section 13.20.040 are also prohibited and fall under the general heading of Standards and Limitations.
5.3 Proper Design and Construction of New and Rehabilitated Sewer Connections
The City ensures proper design and construction of new and rehabilitated sewer connections through the use of City Standards and Specifications. All sewer designs are carefully reviewed by qualified City staff. Before the 100-percent submittal drawings for new development and redevelopment projects are accepted, the Public Works Director and Senior Engineer review and approve the design drawings. For new subdivisions the Senior Engineer Technician and/or Senior Engineer and the Public Works Director review and approve the design drawings. The City’s formal review of proposed projects is adequate.
5.4 Proper Installation, Testing, and Inspection of New and Rehabilitated Sewers
Currently the City employs two full-time inspectors to observe construction of all City projects to ensure the proper installation, testing and inspection of new and rehabilitated sewers. The need for additional inspectors should be evaluated on an as-needed basis. For new sewer installation the mainline is cleaned, pressure tested and videotaped by the contractor prior to acceptance by the City. Currently the City does not require testing of their laterals, unless specifically requested, which is recommended in detail in Section 5.8.
5.5 Access for Maintenance, Inspection, or Repairs for
Portion of City Owned Laterals
The City ensures authority to inspect the premises of any person discharging waste to the collection system through Section 13.20.110 Authority and Responsibility of the City’s Municipal Code.
5.6 Limit the Discharge of Fats, Oils and Grease and Other Debris
The City ensures authority to limit the discharge of fats, oils and grease to the collection system through Section 13.20.110
5.7 Enforcement of the City’s Sewer Ordinances
The City has enforcement mechanisms and penalties available to respond to instances of noncompliance as part of Chapter 13.12 – Sewer Connection Charges, Chapter 13.20 – Industrial Waste, Section 13.20.090 Enforcement and Chapter 13.24 Septic Tank Cleaning, Section 13.24.050 Permit-Suspension-Revocation of the City’s Municipal Code. The enforcement mechanisms and penalties contained in the City’s sewer ordinance are adequate to regulate and provide a safe wastewater collection system.
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5.8 Recommendations
The following recommendations for legal authority of the City’s collection system are based on the review of the current City ordinances and as described above.
5.8.1 Inspection Services
The City should consider using developer fees to cover the cost to inspect laterals and CCTV the lines prior to the one-year guarantee expiration period.
As part of the formal project review, it is recommended that the City develop inspection requirements as part of their engineering standards for the contractor to provide CCTV records of all newly constructed sewer mains and laterals within one year of their installation.
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Section 6: Operations and Maintenance
6.1 Collection System Map
Comprehensive mapping of the collection system provides an important management and operations tool that is used to properly operate and maintain the collection system.
Recently, the City completed transferring collection system data from AutoCAD to Geographic Information System (GIS). The GIS mapping includes the following collection system asset information:
• Gravity and force mains with pipe material, diameter and direction of flow. • Pump station location defined by coordinates; SCADA monitoring will continue to be used to monitor wet well operating depth.
• Manhole location including rim elevation. The City will continue to confirm invert elevations, pipe size and material as they perform cleaning and maintenance; it is estimated more than 90 percent of pipe material has been identified. • Drop manholes and air vacuum relief valves locations. • Mainline cleanout location.
Lateral connection locations are not part of the GIS collection system files and currently the City does not plan to collect this information. In future SSMP Updates and/or audits; the City will continue to monitor and assess whether this information will be of value in assisting the City in meeting the objectives of the SSMP. Currently the City’s collection system map (Figure 1-1 in Appendix D) shows location of gravity lines, force mains and pump stations.
An element of a well-managed collection system is the ability to track the performance of collection system assets. Each individual wastewater collection system asset has a unique identifier. Tracking each asset provides management with the information needed to properly allocate fiscal and labor resources. Proper system asset management allows City staff to make cost effective management decisions regarding capital procurement and setting annual O&M budgets. The City began using the CMMS program to generate work orders for both preventative and corrective maintenance in the third quarter of 2013. The City tracks assets, preventative and corrective maintenance activities, and industrial pretreatment program inspector compliance findings to generate reports on asset performance and identify hot spot locations. Section 6.8 provides more details regarding asset management recommendations.
Maintenance workers need up-to-date maps to operate and maintain the collection system in order to function efficiently. Maintenance workers use computer tablets in the field to access the City’s GIS based collection system maps. When maintenance workers find a discrepancy between collection system maps and field conditions, corrections are noted and sent to the City Engineering office. The corrections are compared to the record map information and once the discrepancy is agreed upon the AutoCAD and GIS map line work is updated.
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6.2 Resources and Budget
The City has both a sewer connection and a monthly sewer user fee rate structure with different categories to accommodate new development and existing users. City authority to levy and collect fees for connection to and use of the sewer collection system and WQCF is established in the Municipal Code specifically within Title 13, Public Services.
Chapter 13.12, 13.14 and 13.16 of the Municipal Code governs Sewer Connection Charges to residential, commercial and industrial users. This chapter also provides for the annual adjustment of connection fees to accommodate increases in construction and engineering costs. Chapter 13.12.090 covers revenue use and requires that all revenue derived from connection charges be deposited in the capital improvement fund and used for the acquisition, construction, reconstruction, reimbursement, maintenance and operation of the City’s sanitary sewer and treatment system. The sewer collection system fee for new development is called the Public Facilities Implementation Plan (PFIP) sewer collection system fee.
The City conducts rate studies periodically; the last rate study was completed in 2008. As a result of the 2008 revised rate study, in 2009 the City implemented new monthly sewer service fees for existing customers. Also, the connection fees and sewer user charges can be increased annually based on construction cost index with City Council approval; however, there have not been any increases since 2010. Another rate study is not anticipated for another two years, based on review of reserves and operations and maintenance budgets.
The City does have a Capital Improvement Plan (CIP) that provides for system repair/replacement. Projects are prioritized based on the Wastewater Collection System Master Plan Update. Priorities for rehabilitation, replacement and repair are based on the criticality of the project and funding availability. Rehabilitation projects are funded through sewer user fees.
The City’s existing sewer system is similar to most growing cities with the older existing infrastructure located around the town center and new building/infrastructure surrounding the older system. Therefore most of the work done within the existing system is funded through monthly sewer user rates, while the new infrastructure is usually funded through development sewer connection fees.
The current resources and budget pool appears to be sufficient to maintain the current collection system at its current level of operation. However, many maintenance and operational functions are very informal with little or no documentation or asset performance tracking. Typically, collection system management has to become more formal as the collection system grows.
Specific recommendations on system management formality are presented in Section 6.8.
6.3 Prioritized Preventative Maintenance
The purpose of preventative maintenance (PM) is to ensure ongoing reliable regulatory compliant sewer collection and treatment services. A properly maintained collection system will help minimize overflows in addition to addressing other operational issues on a proactive basis.
Reducing SSOs reduces mitigation costs and protects public health and the environment.
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6.3.1 Scheduled Inspections and Condition Assessment
6.3.1.1 Pipeline Inspection and Maintenance
Additional City staff and equipment resources has resulted in the sewer collection system being cleaned from approximately every 5-years to approximately every 3.5-years. Based on the history of complaints and known “hot spots” at approximately 90 sites, the City visits these locations on a quarterly to semi-annual basis resulting in a significant decline in SSOs generated from these sites. There is no formal written procedure for cleaning the system, but inspections are conducted using the Pipeline Assessment Certification Program (PACP). It is recommended that Formal Inspection/Cleaning Procedures be developed as described in detail in Section 6.8.
The procurement of two new FTE maintenance workers and CCTV equipment has expanded the use of CCTV inspection to include general and scheduled condition assessment of the sewer collection system infrastructure. A formal program for CCTV inspection is in place and being performed by trained and certified operators. City staff follow PACP coding guidelines.
If the condition of a pipeline is found to be compromised, the following repair, rehabilitation, and/or replacement options are considered:
1. Spot Repair – If the pipeline is structurally sound, the hydraulic capacity is sufficient, and the problem is isolated, the pipeline may be cleaned, open-cut repaired or replaced, grouted, or rubber sealed with stainless-steel mechanical bands.
2. Rehabilitation – Rehabilitation may be used to improve the hydraulic capacity and/or improve the structural integrity of the pipeline. Rehabilitation options may include use of sliplining, cured-in-place pipe, fold-and-form lining, segmental lining or on-line replacement. The preferred rehabilitation option is selected based on economic considerations and the specific circumstances of the proposed pipeline rehabilitation.
3. Replacement – Pipeline replacement may be used when the integrity of the pipe is severely compromised and/or increased hydraulic capacity or relocation of the pipeline alignment is needed. The methods that may be used include open cut excavation, pipe bursting, or pipe reaming. The preferred replacement option is selected based on economic considerations and the specific circumstances that may select a specific replacement method.
6.3.1.2 Pump Station Inspection and Maintenance
The City’s PM program has evolved from being relatively informal with no written procedures or checklists to one where a checklist for mechanical functionality and general conditions is now utilized for pump station inspections.
Currently the City inspects all sewer pump stations weekly and cleans and inspects wet wells approximately once every three months. Inspections are performed in the same manner each time. The pump stations are visited and checked for general conditions including odors, building condition, electrical component condition, alarm and remote monitoring system condition, and evidence of leakage. A Sewer Lift Station Routine Check List and Lift Station Log are included in Appendix C. Typically the major maintenance procedure performed during wet well cleaning and inspection is grease removal. Old or defective equipment is replaced on an as needed basis.
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Standby power is provided at each pump station. Each pump station has an electrical connection and transfer switch that allows standby power to operate the pump station. The City has two portable generators, which is sufficient for local loss of power at the smaller pump stations. Four pump stations serving effectively as sub-regional units are equipped with permanent emergency standby power. Due to more restrictive Occupational Safety and Health Administration (OSHA) safety requirements connection of a portable generator has been restricted to persons “qualified” to perform electrical work. Consequently, all maintenance workers should be trained to connect the portable generator to the pump station through execution of new electrical safety requirements. Each pump station can be bypassed through a portable pump and existing cam lock fittings at each site without the need of a permanent generator. Each pump station piping system, is equipped with backup pumping capacity, and are monitored and controlled via wireless SCADA. If the power goes out the levels are still monitored for at least twelve hours as the controls and SCADA are on back-up battery power.
The alarm signals for each of the pump stations include:
● Motor fail to start
● Motor overload
● High water level alarm.
● Low water level alarm.
● Loss of power
● Intrusion alarms to several of the pump stations
Staff response time during off hours is forty-five minutes, which is sufficient to prevent wet well overflows, which typically prevents an SSO.
Currently no reports are written for a pump station failure, the only available documentation are the corrective work orders written in CMMS for the parts or labor. The City has standardized the type of pumps and only uses Flygt pumps; unless otherwise warranted. The pumps are operated automatically based on wet well level. For a list of pumps, see Table 1-1.
6.3.1.3 Manhole Inspection and Maintenance
The City’s current manhole maintenance is typically completed during the CCTV inspection or cleaning of pipelines. Manhole maintenance typically includes inspection of the manhole structure on the interior and by visual observation. With the new CMMS system a formal process for maintenance workers to document manhole inspections is being developed.
Recommendations for a formal manhole inspection procedure are described in more detail under Section 6.8.
6.3.1.4 Air Release Valves Inspection and Maintenance
Currently, there are approximately 40 cast iron air release valves (ARVs) located in the collection system. Most of the ARVs are manufactured by either APCO or Crispin and have been in service since about 1998. Figure 1-1 in Appendix D shows the location of the ARVs in the collection system.
The City’s current ARV maintenance typically includes cleaning, flushing, and testing the isolation valve operation. The frequency is approximately once every year. It is recommended a ATTACHMENT 2
more formal inspection/cleaning procedure be developed as described in detail under Section
6.8 for ARV stations.
6.3.1.5 Other Key Collection System Component Inspection and Maintenance Currently the City has monitoring requirements based on their waste discharge permit for industrial users. The City’s Municipal Code, Chapter 13.20 describes the City’s Industrial Waste Ordinance (see Section 4.2 of this report for further details).The permitted industries are selfmonitored and send their reports to the City twice a year. The consequences for not submitting a report or exceeding water quality or flow numerical limits ranges from a notice of violation to discharge shut down.
6.4 Contingency Equipment and Replacement Inventories
Adequate spare/replacement parts are kept in inventory to minimize equipment/facility downtime in the event of an unplanned failure. Replacement parts for pumps, motors, and vehicles and appropriately maintained emergency response equipment and accessories allow maintenance workers to effectively respond to incidents and efficiently perform routine maintenance. The City currently stores the following equipment:
● Two 6-inch pump and 500-feet of hose each
● One 4-inch pump and 500-feet of hose
● One 3-inch pump and 300-feet of hose
● One portable hose reel with 2,500-feet of 10-inch hose ● Two vacuum trucks
● One rodder truck with 250-feet of rod
● Miscellaneous size of pipe plugs
● Confined space entry equipment
● Spill response truck equipped to respond to SSOs
6.5 Training
Training is an essential part of the inspection and maintenance program. Topics covered in regularly scheduled staff and safety meetings include:
● Emergency response procedures
● Safety procedures
● O&M procedures
● Identification of potential problems within the system ● Data collection and record keeping
● Distinction between structural and hydraulic failures, and their remedies ● Bypass pumping procedures
● Confined space and traffic safety training
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The maintenance workers are trained to the same level of competency to provide the greatest level of redundancy in trained staff resources.
Not all of the training for the City is conducted at the City’s facilities or by the City, some is formally structured and formal training is documented such as attendance to the California Water Environment Association (CWEA) or other webinars, workshops and conferences.
6.6 Outreach to Plumbers and Building Contractors
Currently the City has an informal reactive program of distributing copies of their sewer standards to plumbers or building contractors who have improperly repaired and/or installed sewer components. In reviewing the SSOs over the last seven years it does not appear that a more formal program is needed at this time with only one (1) SSO reported as being caused by construction/contractor.
The City does ensure that contract design engineers have access to a complete set of the sewer design standards and that the design standards are incorporated into the construction contract documents.
6.7 Corrective Maintenance
Priorities for rehabilitation, replacement and repair are established by how critical the project is and the availability of funds and other resources. The City has completed projects involving sewers that appear to be in a state of imminent failure. As discussed in the CIP Prioritization and condition assessment recommendations in Section 6.8, the City should consider adopting the programs in order to convert to a PM mode.
6.8 Recommendations
The following recommendations for O&M of the City sewer collection system are based on an assessment of the current O&M practices used by the City. The current O&M practices have frequently been described as “informal” in that there is little documentation and tracking of O&M activities. Documentation of O&M activities helps ensure that all maintenance workers perform their O&M duties uniformly and to the same standard of care and excellence, thus helping ensure uniform and consistent sewer collection service while minimizing SSOs. Tracking O&M activities provides a record of performance for both equipment and maintenance workers that should be used by the supervisor and management to correctly allocate resources, direct training, develop relevant capital budgets and develop annual operating budgets. The tracking system is a critical feedback element necessary for all functioning management systems.
6.8.1 Capital Improvement Program Projects Prioritization Capital Improvement Program Projects (CIPPs) should be prioritized based on a set of criteria developed by the City. CIPPs should be prioritized on at least the following criteria:
● Reduced risk and minimization of liability to the City ● Available funding
● Implementation period
● Areas of high maintenance or frequent SSOs
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● Areas of limited capacity
● Project cost benefit analysis
When fully implemented, CIPPs should reduce the risk and liability exposure to the City. These projects should include maintaining and improving service and reliability to City critical functions such as emergency services (fire, police, hospitals, and ambulance/emergency health care) and emergency support services such as municipal, state and federal functions. Clearly this approach requires an analysis of sewer collection services throughout the City and an assignment of relative importance to sewer collection sheds.
To determine which has the highest priority, the criteria that may be considered for prioritizing the Capital Improvement Program (CIP) may include review of maintenance activities, known extensive maintenance areas, SSO history, potential impacts to public/environment should a failure occur, capacity issues, and does the asset meet City’s minimum design standards.
A CIPP implementation schedule should be developed such that the three new trunk sewers, existing sewer improvements, and increased or scheduled maintenance line items are budgeted by the following proposed schedule (the three main trunk sewers may need to be divided into phases to be designed and constructed):
● 2019 to 2023 – CIP project name
● 2024 to 2028 – CIP project name
This would better define the budget necessary to complete the CIPP each year, confirm that revenue from development connection fees and sewer user charges are adequate, and keep the City on track to make sure wastewater collection system assets are in place prior to need.
It is recommended the criteria used to prioritize the CIPP should be reviewed on a periodic basis versus the CIP. If needed, the CIPP implementation schedule may need to be adjusted.
This should be done about once every year to once every two years depending on development and SSO history during that period.
6.8.2 Formal Inspection/Cleaning Procedures
Formal inspection and cleaning procedures are part of a properly operated and maintained collection system. The City should develop Standard Operating Procedures (SOPs) for inspection and cleaning in order to standardize how the system is cleaned and to document debris analysis and other observations made by the maintenance workers.
A condition assessment program should be implemented to serve as a means of determining how well O&M procedures are working. This is covered by provision 13, SSMP paragraph (x), SSMP Program Audits; see Condition Assessment Program recommendation below. With the new CMMS, the City will be able to document and track how often assets are maintained, the results of the invested maintenance, and schedule future maintenance by asset.
Pipeline – Pipeline inspection procedures should include documented regular periodic surface inspection along the sewer alignments to detect problems such as construction-related damages and leaks or failures. See Appendix C, form C.4 for a sample inspection form. CCTV ATTACHMENT 2
inspection is recommended as part of the Condition Assessment Program described in Section 6.8.4. It is recommended that CCTV inspection and cleaning of sewer pipelines be completed at a rate of approximately 5% and 10% per year, respectively.
Manholes – Manhole inspection procedures should include visually inspecting the frame condition and checking for offsets or misalignments, checking for evidence of surcharge and I/I, checking for evidence of corrosion damage, checking for accumulations of grease, debris, or grit, and checking flow characteristics. Manholes located in the roadway should be inspected for settlement and subsidence around the outside of the manhole. See Appendix C, form C.2 for a sample inspection form.
Manholes with noted deficiencies and corrosive damage should be inspected annually to monitor condition. Other manhole inspections should be completed as needed in response to a flow inconsistency or other indications of incipient failure in the collection system or approximately 5% of the system’s manholes each year.
ARVs – Inspection of the ARV should continue to be scheduled once every year (or more frequently should field conditions warrant additional attention) and includes visually inspecting the ARV assembly condition; verifying that the ARV is in service; and checking for evidence of leaking, for the presence of corrosion, and for accumulation of debris on the assembly. In addition, the regular periodic inspection of the pipeline alignment includes inspection of the ARV area for evidence of damage, leaks, and failures. Also the manufactures recommendation for cleaning and inspection should be followed (i.e., frequency of back flushing). See Appendix C, form C.3 for a sample inspection form.
Other inspection items should include checking the condition of, operation of, and access to valves, operators, cleanouts, and bypass assemblies. Maintenance structures are also checked for condition, evidence of leaking, and evidence of structural problems. These inspections are conducted every two years to annually and in coordination with other collection system inspections.
6.8.3 Computerized Management and Maintenance System
The City utilizes the CMMS to schedule PM, capture preventative and reactive maintenance operations, and track performance and level of effort required to operate and maintain individual and sewer shed sewer system assets. An evaluation of the CMMS data would determine if tools, equipment, services and/or staffing is adequate to properly operate and maintain the wastewater collection system. In addition, the proper allocation of FTEs by asset would be evaluated using this tool. The steps taken to adequately operate and maintain the wastewater collection system would be either verified or new or additional steps recommended. The CMMS data would also be used to determine when a proactive rehabilitation, repair and/or replacement of deteriorating wastewater collection system asset(s) should be scheduled.
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Section 7: Design and Construction Standards
7.1 Standards for Installation, Rehabilitation, and Repair of Sanitary Sewers
The City’s standards for the design of sanitary sewer systems is covered by the City’s Standard Plans and Specifications Section 71 – Sanitary Sewers (2006), for recommendations to updating the standards see Sanitary Sewer Standards Update under Section 7.3.
7.2 Standards for Inspection and Testing for New and
Rehabilitated Sanitary Sewer Facilities
Currently the City employs two full-time inspectors for all City projects as described in Section
5.4 of this report
The City’s Standard Plans and Specifications outline the acceptance testing for sanitary sewer construction. The City standards include:
● Compaction testing of bedding and backfill.
● Pipelines – mandrel deflection testing and air testing.
Refer to the Inspection and Testing Standard recommendation (Section 7.3) for suggestions to modifying the current procedures.
7.3 Recommendations
The following recommendations for design and construction standards are based on the evaluation of the City’s current standard plans and specifications.
7.3.1 Sanitary Sewer Standards Update
Upon review of the Standard Plans and Specifications for Sanitary Sewers there are a number of improvements to be considered for materials and methods of construction. The City should consider conducting a formal review and develop appropriate amendments to the existing City standards. The standards should be adopted by the City, distributed electronically (place on City website) and advertised to the development, contracting and engineering community of the updated standards.
7.3.2 Inspection and Testing Standards
The City’s testing and inspection for new sanitary sewer system should be reviewed and updated as well as evaluated to ensure adequate inspection staff is provided. Examples of areas that should be considered for revision include:
● Require CCTV inspection of all mains and laterals 11 months after installation, just prior to the end of the one-year warranty period.
● Require vacuum testing of manholes after backfilling is complete.
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Section 8: Capacity Management
8.1 Capacity Assessment
The City determines the system capacity through regular master plan updates. The last wastewater collection system master plan update was completed in January 2013 with prior updates in 2005, 1993 and 1989. The wastewater collection system master plan update contains pertinent sections such as design criteria, recommended collection system strategy and recommended system improvements.
The hydraulic sewer model is used for future planning purposes to evaluate the impacts and needs to meet future development. The City uses the appropriate tools to proactively evaluate and adequately track the available collection system capacity.
8.2 System Evaluation and Capacity Assurance Plan
The system evaluation is in the form of a master plan update, which includes recommendations for sewer system rehabilitation, replacement and repair. The CIP and emergency projects are prioritized based on which are most critical (high traffic areas, temporary repair not functioning, system in jeopardy of eminent failure, etc.), and funding availability.
In 2017 the south trunk was upgraded to a 48-inch gravity line. The north trunk line upgrade has stalled due to a lack of funding, but it is next priority. Once the north trunk upgrade is complete, engineering will begin work on the central trunk line upgrade.
8.3 Recommendations
The following recommendation for the City’s capacity management is based on the assessment of the Wastewater Collection System Master Plan Update.
8.3.1 Implementation Schedule
It is recommended that the City develop an implementation schedule for the north and central trunk sewer sheds. The schedule should be based on the use of a calibrated hydraulic model, the City’s general plan and any specific plans that have/are or will be permitted. For further details of this recommendation see Section 6.8.1.
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Section 9: Monitoring, Measurement and Program
Modifications
9.1 Implementation and Effectiveness of the SSMP Elements A brief description of how the City implements and measures the effectiveness of the major operational components of the SSMP is described below. The actual evaluation is summarized in the SSMP 2-year Program Audit found as Appendix E.
O&M Program: Monitoring implementation of the O&M program is the responsibility of the City’s Wastewater Collection System Supervisor. Effectiveness of the O&M program is measured based on the following:
Number of SSOs per year
Number of dry weather SSOs per year
Number of SSOs per year by cause (e.g., grease, roots, debris, etc.) Length of gravity sewers cleaned annually
Actual versus scheduled cleaning dates for gravity sewers Length of gravity sewers CCTV inspected annually
Record of pump station maintenance work orders completed annually FOG Control Program: Effectiveness of the FOG Control Program is measured based on the occurrence of SSOs caused by FOG.
System Evaluation and Capacity Assurance Plan: Effectiveness of the capacity assurance plan is based on the occurrence of capacity related overflows and by the timely completion of identified sewer replacement projects as a sewer reaches its capacity.
These metrics are to assist the City in measuring the effectiveness of the SSMP and determine if program changes are warranted.
9.2 Updating SSMP
The SSMP should be updated at least once every five years by the Collection System Supervisor with the contribution of the maintenance workers, the WQCF Superintendent and Senior Engineer. The review would be based on results from the two-year SSMP audits. A report should be prepared and kept on file. If warranted, addendums or modifications will be made and reviewed with Engineering, O&M Supervisors and maintenance workers once every five years. Should major changes arise, the SSMP may need to be updated and approved through the City Council.
9.3 SSMP Audits
The City will conduct an audit every two years and update the SSMP once every five years. Any major modifications to the SSMP that result from the audit will require certification by the City ATTACHMENT 2
Council. As part of the 2014 SSMP Update an Audit Template was developed as a guide for conducting the audits and is included in Appendix E.
Table 9-1 below provides a schedule over the next 16 years for when the City is to conduct Audits versus SSMP updates.
Table 9-1: SSMP Audit and Update Schedule
Year SSMP Requirement
2019 SSMP Update
2020
2021 Audit
2022
2023 Audit
2024 SSMP Update
2025
2026 Audit
2027
2028 Audit
2029 SSMP Update
2030
2031 Audit
2032
2033 Audit
2034 SSMP Update
2035
ATTACHMENT 2
Section 10: Outreach Communications Program
As part of the SSMP, a public outreach communication program may be warranted for certain elements of the SSMP (e.g., FOG program, illegal and illicit connections, etc.). Refer to the recommendation below for further discussion.
10.1 Recommendations
10.1.1 Public Outreach Communication Program
The City should evaluate if an active or passive public outreach communication program is needed. Active public outreach programs include flyers, door knob hangers, advertisements and public meetings. Passive programs would include mailers and leaflets. Initially, a passive program is recommended. The effectiveness will be measured each year as described in Sections 9 and 10 of this report and any modifications recommended in the audit.
ATTACHMENT 2
Section 11: Sewer System Management Plan –
Summary of Recommendations
In evaluating the City’s current O&M procedures, a largely informal system is in practice with minimal written procedures and documentation. A summary of the recommendations made in the 2006 and 2014 SSMP are listed below with an update as to whether the recommendation is still warranted for this 2019 SSMP Update. For the recommendations that are still warranted they are further described throughout the report. As these changes are implemented, the City’s approach to O&M of their wastewater collection system will progress to operating in a preventative mode.
Table 11-1: Summary of Recommendations
2006
Recommendation 2014 SSMP Update 2019 SSMP Update
SSMP
Section Schedule
Staffing Workload
Evaluation
Recommendation is still
warranted as staffing will
need to be continually
evaluated with changes in
organization structure,
population growth in the
City and maintenance
activities.
Recommendation is still
warranted as staffing will
need to be continually
evaluated with changes in
organization structure,
population growth in the
City and maintenance
activities.
2.3.1 Ongoing
Tracking and
Recording SSOs
The City is recording and
tracking their SSOs;
therefore, this
recommendation is no
longer warranted.
N/A
Reporting The City is currently
reporting their SSOs per
the SWRCB WDR
requirements; therefore,
this recommendation is no
longer warranted.
N/A
Database Objective Recommendation is still
warranted as the City is
initiating the use of the
Computerized
Management and
Maintenance System
(CMMS) and will be
populating with data in
order to assist the
objectives described in
the recommendation.
Recommendation is still
warranted; the City has
completed transferring
collection system data
from AutoCAD to
Geographic Information
System (GIS), and the
data will be used to meet
the objectives described.
3.2.1 6.1
Ongoing
ATTACHMENT 2
2006
Recommendation 2014 SSMP Update 2019 SSMP Update
SSMP
Section Schedule
FOG Program The City updated and
adopted the Industrial
Waste Ordinance, which
includes FOG Control
component; therefore, the
recommendation has
been fulfilled and no
longer warranted.
N/A
Pollutant
Requirements
The City recently updated
their Industrial Waste
Ordinance; therefore, the
recommendation is no
longer warranted.
N/A
Inspection Services Recommendation is still
warranted as the City
should review and
consider the CCTV and
inspection of installed
sewer mains and laterals
prior to the one year
warranty period expiring.
Recommendation is still
warranted as the City
should review and
consider the CCTV and
inspection of installed
sewer mains and laterals
prior to the one-year
warranty period expiring.
5.8.2 Ongoing
Ownership of Laterals The City is in the process
of clarifying ownership of
laterals. For now, the
current policy remains in
place.
The City should continue
to collect data on lateral
SSOs to determine if they
are a significant source of
total SSOs in the City and
which are caused by
private property owners.
Appendix G Ongoing
Collection System
Map
The City has completed
the transfer of collection
system components from
AutoCAD to Geographic
Information System (GIS)
and has begun the
integration process with
other City owned utilities.
The City is commencing
the next phase of
integrating the mapping
with the CMMS.
The City has completed
the transfer of collection
system components from
AutoCAD to Geographic
Information System (GIS)
and has begun the
integration process with
other City owned utilities.
The City has integrated
the mapping with the
CMMS, which is used to
generate reports on asset
performance and identify
hot spot locations.
6.1 Ongoing
Updating As-Builts The City has a procedure
in place for updating
collection system
mapping; therefore, this
recommendation is no
longer warranted.
N/A
ATTACHMENT 2
2006
Recommendation 2014 SSMP Update 2019 SSMP Update
SSMP
Section Schedule
Wastewater Collection
System Asset
Identification
As part of the conversion
into GIS mapping the City
has assigned a unique
identifier to each
collection system sewer
asset; therefore, this
recommendation is no
longer warranted.
N/A
CIP Prioritization Recommendation is still
warranted.
Recommendation is still
warranted.
6.8.1 Ongoing
Updated Rate Study The City performed an
updated rate study in
2008; therefore, this
recommendation is no
longer warranted.
N/A
Formal
Inspection/Cleaning
Procedures
Recommendation is still
warranted.
Recommendation is still
warranted.
6.8.2 Ongoing
CMMS Recommendation is still
warranted.
The City is utilizing CMM
as recommended,
however, as not all assets
have been entered, this
recommendation is still
warranted.
6.8.3 Ongoing
Condition Assessment
Program
Recommendation is still
warranted.
The City now performs
their own CCTV
inspections following
PACP coding guidelines.
Therefore, this
recommendation is no
longer warranted.
N/A
Contingency
Equipment and
Replacement
Inventories
The City keeps on hand
the necessary
contingency equipment
and has their process in
place for replacement
inventories; therefore, this
recommendation is no
longer warranted.
N/A
ATTACHMENT 2
2006
Recommendation 2014 SSMP Update 2019 SSMP Update
SSMP
Section Schedule
Training The City keeps track of
training attendance by
date and topic covered for
internal training or on the
job training.
Documentation is also
kept on file for attendance
to California Water
Environment Association
(CWEA) or other
professional training. The
current training program
meets their needs,
therefore, the
recommendation is no
longer warranted.
N/A
Plumbers and
Contractors Outreach
Program
Recommendation is no
longer warranted as the
number of SSOs
attributed to
construction/contractor is
minimal.
N/A
Sanitary Sewer
Standards Update
Recommendation is still
warranted.
Recommendation is still
warranted.
7.3.1 Ongoing
Inspection and Testing
Standards
Recommendation is still
warranted.
Recommendation is still
warranted.
7.3.2 Ongoing
Implementation
Schedule
Recommendation is still
warranted.
Recommendation is still
warranted.
8.3.1 Ongoing
SSMP Monitoring This recommendation is
addressed within the
SSMP Audit Template,
therefor, this
recommendation is no
longer warranted.
N/A
Audit Report This recommendation is
addressed within the
SSMP Audit Template;
therefore, this
recommendation is no
longer warranted.
N/A
Public Outreach
Communication
Program
Recommendation is still
warranted as the City will
need to continually
evaluate the effectiveness
of its outreach
program/activities.
Recommendation is still
warranted as the City will
need to continually
evaluate the effectiveness
of its outreach
program/activities.
10.1.1 Ongoing
ATTACHMENT 2
References
Metcalf & Eddy. 2003. Wastewater Engineering Treatment and Reuse, Fourth Edition, McGraw Hill, Inc., New York.
Nolte Associates, Inc. 2005. Draft City of Manteca Wastewater Collection System Master Plan Update.
NV5. 2013. City of Manteca Wastewater Collection System Master Plan Update.
ATTACHMENT 2
Appendix A
Sanitary Sewer Overflow Response Plan
ATTACHMENT 2
City of Manteca
Sanitary Sewer Overflow
Response Plan
4 April 2014
Prepared for
City of Manteca
1001 W. Center Street
Manteca, CA 95337
K/J Project No. 1270003.00
ATTACHMENT 2
CITY OF MANTECA
SANITARY SEWER OVERFLOW RESPONSE PLAN
Table of Contents
Introduction to Sanitary Sewer Overflow Response Plan ......................... 1 Section 1 – Notification to the City .............................................................. 2 Section 2 – Response by City ....................................................................... 3 Section 3 – Reporting Procedure ................................................................. 9 Section 4 – Required Notifications
(Not to be confused with Reporting) ...................................... 11
LIST OF TABLES
Table 1: Sanitary Sewer Overflow Posting Decision Process
LIST OF FIGURES
Figure 1: City of Manteca SSO Response Field and Reporting Procedures Flowchart Figure 2: City of Manteca WQCF Sanitary Sewer Overflow Notification List Figure 3: Existing Sewer Collection and Existing Storm Drain System
LIST OF ATTACHMENTS
Attachment I: Request for Service Form
Attachment II: (Sample) SSO Field Report Form
Attachment III: SSO Flow Estimation Pictures
Attachment IV: Chain-of-Custody Record and Analysis Request Attachment V: City of Manteca Key Personnel
Prepared by:
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CITY OF MANTECA
SANITARY SEWER OVERFLOW RESPONSE PLAN
Introduction to Sanitary Sewer Overflow Response Plan
The City of Manteca’s (City’s) Sanitary Sewer Overflow Response Plan (SSORP) presents a documented procedure for:
identifying a sanitary sewer overflow (SSO);
responding to a SSO;
notifying City, emergency and regulatory officials;
notifying the public of potential environmental and health hazards, if applicable; documenting the SSO event and response;
reviewing the cause and generating improvements to prevent a future SSO event; and developing an implementation plan to prevent a future SSO event.
This SSORP describes the need to mobilize labor, materials, tools, and equipment to correct conditions that may cause or contribute to a non-permitted discharge. The plan applies to a wide range of potential system failures that could create an overflow event. The SSO Response Plan is composed of the following sections: 1) notification, 2) response, and 3) reporting.
This SSORP is an update of the City’s previous SSORP, incorporating the changes from the amended State Water Resources Control Board’s (SWRCB) Monitoring and Reporting Program (MRP) (Order 2013-0058-EXEC) to ensure compliance with the Waste Discharge Requirements (WDR).
SSO Classification
Under the newly amended MRP Order No. 2013-0058-EXEC, SSOs are categorized into the following categories described below. However, regardless of the SSO category or of its volume, it does not alter the City’s SSO response procedures (containment, control, and recovery) or staff’s responsibility to understand and comply with notification and reporting processes.
Category 1
Discharges of untreated or partially treated wastewater of any volume resulting from the City’s sanitary sewer system failure or flow condition that:
Reach surface water and/or reach a drainage channel tributary to a surface water; or Reach a Municipal Separate Storm Sewer System (MS4) and are not fully captured and returned to the sanitary sewer system or not otherwise captured and disposed of properly. Any volume of wastewater not recovered from the MS4 is considered to have reached surface water unless the storm drain system discharges to a dedicated storm water or groundwater infiltration basin (e.g., infiltration pit, percolation pond).
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Category 2
Discharges of untreated or partially treated wastewater greater than or equal to 1,000 gallons resulting from the City’s sanitary sewer system failure or flow condition that does not reach a surface water, a drainage channel, or the MS4 unless the entire SSO volume discharged to the storm drain system is fully recovered and disposed of properly.
Category 3
All other discharges of untreated or partially treated wastewater resulting from the City’s sanitary sewer system failure or flow condition.
Private Lateral Sewage Discharges
Discharges of untreated or partially treated wastewater resulting from blockages or other problems within a privately owned sewer lateral connected to the City’s sanitary sewer system or from other private sewer assets. Private Lateral Sewage Discharges (PLSDs) that the City becomes aware of may be voluntarily reported to the SWRCB California Integrated Water Quality System (CIWQS) Online SSO Database.
Section 1 – Notification to the City
Overflows may be reported by City employees, contractors or by the general public. Indications of an SSO could include “dirty” discharge, foul odor, or unusual flooding such as overflowing manholes, cleanouts or pump stations. City employees report problems directly to wastewater maintenance or City staff. Telephone calls from the public are received by plant staff at the City’s Wastewater Quality Control Facility (WQCF) and/or the City’s police department and routed to the WQCF staff. For the complete chain of communication for responding to SSOs refer to Figure 1, SSO Response Field and Reporting Procedures Flowchart.
After receiving notification of a possible SSO, the City records all relevant information on a Request for Service Form (Attachment I). Relevant SSO information recorded on the Request for Service Form includes:
Time and date call was received;
Specific location;
Description of problem;
Time possible SSO was noticed by the caller;
Caller’s name and phone number;
Observations of the caller (e.g., odor, duration, back or front of property); and Other relevant information that will enable the maintenance worker to quickly locate, assess, and stop the overflow.
Information from the Request for Service Form is used by the plant staff to dispatch the appropriate maintenance worker or crew to the area. Once arriving on the site and the maintenance worker or crew confirms that an SSO is occurring then an SSO Field Report form will be completed as shown in Attachment II.
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Standard Operating Practices are followed when an SSO reaches waters of the United States (U.S.), for notification procedures refer to Figure 2, City of Manteca WQCF SSO Notification List.
Section 2 – Response by City
Any system failure within the City’s service area that causes or threatens to cause an SSO will initiate an immediate response to isolate and correct the problem. Crews and equipment are available 24 hours per day. The maintenance worker must use discretion when assisting private property owners, occupants, or other non-City employees, as the City could face increased liability for damages inflicted to private property during such assistance.
The following procedures have been developed for responding to SSOs. The purpose of these procedures is to ensure that all SSO responses are handled efficiently and effectively and that all regulatory requirements are met. Maintenance workers are required to know and follow these procedures. Figure 1 summarizes the chain of communication for responding to an SSO.
In order to limit public access to and contact with areas affected with SSOs, maintenance workers/supervisor will follow the following response procedures:
I. Investigate and Assess the Problem:
A. Plant staff notifies the maintenance worker of potential SSO and issues Request for Field Service for response.
B. Maintenance worker arrives on site and performs an investigation and assessment of the overflow. The maintenance worker will take immediate action to establish a perimeter and barricade the overflow in order to contain the area. Once the overflow perimeter has been established appropriate health hazard signs will be posted to protect the public from coming in contact with the overflow. The maintenance worker will determine the extent of the overflow, what additional City Operation and Maintenance (O&M) resources will be needed (spill response vehicle, vactor truck, rodder, backhoe and operator, etc.), what additional contract services may be needed (e.g., construction contractor, closed circuit television [CCTV] crew, etc.), and if notification of other agencies is required at that time. Pictures and/or video of the SSO and surrounding area will be taken to document the SSO.
C. Maintenance worker notifies City staff of recommended response. Maintenance worker will take the lead by following these procedures:
1. Locate SSO by address, cross street and point of overflow (i.e., manhole, cleanout, pump station, broken or damaged pipe, air/vacuum release valve [AVRV], flow meter structure, etc.).
2. Determine the current magnitude of the SSO.
Flooded structure
Storm water inlet or exposure to waters of the U.S.
Potential for public exposure
Potential for other environmental impacts
Related problems
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a. Is overflow related to a street collapse?
b. Is overflow related to construction work?
c. Is overflow related to fats, oil and/or grease (FOG) or other debris? d. Is overflow causing a traffic hazard such as displaced manhole cover or street flooding?
Provide initial estimate of overflow rate using pictures (refer to Attachment III).
If the SSO meets any one or all of the criteria listed below immediately contact designated City staff:
Discharged to surface water and/or reaches a drainage channel tributary to a surface water, or
Reaches a MS4.
Estimated damage to public and private property. City staff may enter private property for the purposes of documenting structural damage, floor and wall coverings, and personal property.
Take photographs and/or videotape of SSO event and response as necessary to document the event.
3. Sampling of receiving waters impacted by the overflow is required by regulatory agencies or at the direction of the Collection System Supervisor, particularly whenever an overflow is greater than 50,000 gallons and reaches a storm drain or surface water. Sampling at appropriate locations such as upstream, at entry point and downstream of overflow location will allow the City to establish and monitor the levels of contamination as well as to establish or compare with the natural background levels of bacteria in the receiving waters. If sampling is to be conducted, the Collection System Supervisor will communicate with the laboratory personnel to establish and complete the sampling regime. The Laboratory Analyst will notify San Joaquin County Department of Environmental Health (DEH) that sampling and monitoring is being conducted, and to verify if additional testing is required. The sampling regime is to be continued until a determination is made that contamination resulting from the overflow event no longer exists and no longer poses a health risk to the public. Contact lab personnel and transport sample to laboratory for analysis along with appropriate chain of custody form (Attachment IV). The sample will at least test for Fecal Coliform as a bacterial indicator to comply with the Fourth Edition of the Water Quality Control Plan (Basin Plan) for the Sacramento River and San Joaquin River Basins.
4. Begin initial documentation by completing SSO Field Report Form (Attachment II).
II. Coordination with Hazardous Material Response:
If a suspicious substance (e.g., oil sheen, foamy residue) or odor (e.g., gasoline) is detected, the maintenance worker will contact City staff before taking further action. The City staff will contact the appropriate Hazardous Materials (HAZMAT) response team, according to City protocol, should site conditions be determined hazardous. The maintenance worker will remain at the perimeter of the area.
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PLEASE NOTE: Vehicle engines, portable pumps, and open flames (e.g., cigarette lighter) may cause an explosion or fire if exposed to flammable fluids or vapors.
All City personnel will keep a safe distance and observe caution until the proper authority declares the area to be safe for entry.
Cleanup of the hazardous material is supervised by the HAZMAT team. The maintenance worker(s) follows the instructions of the HAZMAT supervisor, but does not participate in the cleanup of the hazardous material. The maintenance worker proceeds with SSO response procedures only after the HAZMAT supervisor determines it is safe to enter the area.
III. Traffic Control:
Traffic control may be needed immediately to protect the public or City staff. Typically, immediate traffic control is needed if there is a street collapse or significant depression in the pavement that is related to the sewer, if the manhole is ajar, or if the overflow causes flooding of the street. Traffic control may also be needed to prevent wastewater from being further dispersed and to protect the maintenance worker(s) while containing the overflow and removing the blockage, determining the cause or repairing the problem.
A. Provide traffic control per City Standards and regulatory standards.
B. If necessary, contact City police, highway patrol and County of San Joaquin Sheriff to assist with providing proper traffic control.
IV. Contain SSO:
Containment of the overflow is the next step. Containment becomes more difficult if the overflow reaches the storm drain system or drainage way since the overflow can rapidly contaminate receiving waters such as creeks, streams, rivers, and other water bodies.
Figure 3 – Existing Collection System and Storm Drainage is a guide to use by City maintenance worker(s) to contain the overflow. During dry weather, the storm drain system may be used to store the overflow if it can be plugged downstream of the overflow or if the downstream storm drain pump station can be deactivated.
A. Options for containing overflow:
1. Overflow onto ground
a. Rubber mats at catch basin or drain inlet.
b. Sand bags in gutter.
c. Dig trench in earth.
2. Overflow into storm drainage
a. Trace overflow in storm drainage system to downstream end point. b. Plug all affected storm system outlets or block the creek and channels if necessary to contain spill.
c. If possible, turn off storm water pump station.
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3. Overflow onto private and/or public property
a. Confirm SSO not caused by the City sewer system (pump station, interceptor, trunk, main or lateral).
b. Notify property owner or resident.
c. Suggest private property owner or resident contact local plumber or other appropriate services such as restoration contractor.
B. Post warning signs around contaminated area
C. Required equipment for containing overflows:
1. Overflow onto ground and in buildings
a. Rubber mats
b. Sand bags
c. Plastic sheets
d. Bypass pumps and pipes/hoses
e. Vactor truck
f. Spill Response Truck
g. Portable emergency generator
2. Overflow into storm drain
a. Plugs
b. Bypass pumps and pipes/hoses
c. Vactor truck
d. Spill Response Truck
e. Portable emergency generator
3. Overflow at pump station
a. Emergency generator
b. Bypass pumps and pipes/hoses
c. Vactor truck
d. Spill Response Truck
e. Portable emergency generator
4. Additional warning signs
a. If public notification is determined necessary, City Management will determine the need for further public notification through printed or electronic news media or by alternative notification measures (i.e., front door hangers). During the initial investigation and assessment of the SSO the City will barricade the overflow and post the appropriate warning signs (refer to Section 2, paragraph I.B.). Table 1 below describes the procedures to follow for additional public notification:
ATTACHMENT 2
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Table 1: Sanitary Sewer Overflow Posting Decision Process Sanitary Sewer Overflow Response Plan
City of Manteca
SSO Posting for a Confirmed Overflow
1 Maintenance worker confirms a possible SSO to City staff 2 The maintenance worker provides detailed SSO information to City staff
Overflow history at the SSO site
Rainfall data, if wet weather related
Map identifying the SSO location, surrounding area, and surface waters that may be impacted
Maintenance worker provides input on the posting
recommendation
3 City staff consults and recommends whether or not to post warning signs.
4 If posting is recommended, warning signs are posted by the maintenance worker at specified locations.
5 City staff decides when the warning signs are to be removed after notification of clean up by the maintenance worker.
5. Begin preliminary notifications:
Refer to Figure 2 for SSO reportable procedures, and to the SSO Field Report Form, Attachment II.
V. Correct Cause
The cause of the overflow may be located a considerable distance downstream of the actual overflow in areas with flat terrain. During large storms, overflows may occur because of infiltration and inflow (I/I) of storm water into the sewer system. I/I can greatly increase the flow in the collection system and cause overflows from pipes that are only partially blocked by roots, grease, or debris. However, during very large storms I/I can cause the flow in the collection system to exceed the hydraulic capacity of the pipes or pump stations. Under these conditions, it may not be possible to stop the overflow until the flows recede.
A. Locate cause of overflow
1. Sewer main
a. Check flow in manholes.
b. Blockage should be between manhole with sluggish flow or surcharging (upstream manhole) and manhole with very little flow or is dry (downstream manhole).
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2. Sewer lateral
a. Check flow in City cleanout. If cleanout does not have flow, stoppage is located on private property and is not the City’s responsibility. b. If there is no existing City cleanout, notify property owner to clear stoppage.
3. Pump station
a. Check alarm system for indication of problem. All alarms are telemetered by the supervisory control and data acquisition (SCADA) system to the WQCF on Yosemite Road.
b. If power failure has occurred, determine if pump station has an emergency generator and if emergency generator is operating. If pump station has an emergency generator outlet, deliver City’s portable emergency generator to the site.
c. Observe pump station for proper operation.
B. Clear Blockage
1. Within Sewer Main
a. Clear line from dry manhole, if possible, with high pressure cleaning or power rodding equipment and vactor truck.
b. Determine cause of blockage (if possible) by evaluating sample of debris or material captured downstream of cleaning and/or conduct CCTV inspection.
2. Within Sewer Lateral
a. Maintenance worker will rod from property line cleanout to eliminate stoppage in City lateral.
3. If blockage cannot be cleared:
a. Increase containment or initiate bypass pumping.
b. Perform CCTV inspection to determine problem.
c. Repair broken sewer line or excavate pipe and remove section with blockage and replace with a new pipe section and couplings.
C. Pump station:
1. If pump station does not have power, connect portable emergency generator or portable bypass pump system.
2. Check fuel for emergency generator or bypass pump system.
3. If a pump is not operating properly, activate standby pump system.
4. Investigate force main for possible damage or blockage.
5. Make other repairs as necessary.
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VI. Final Volume Estimate:
SSO response staff should make every effort to maintain a careful chronology of the events during an overflow event and make every attempt to conduct linear measurements of the discharge streams and flow velocities in order to effectively quantify the overflow volume. Photo documentation of the overflow event should also become a routine procedure in the overflow documentation process. The final overflow volume is estimated and based on the results additional reporting to regulatory agencies is completed. Final overflow volume will be stored in the City’s records.
A. Estimate final overflow rate using tables and pictures (refer to Attachment III).
B. Overflow volume can also be estimated by multiplying the overflow duration by the overflow rate.
C. Enter overflow volume in the SSO Field Report Form.
VII. Initiate Clean-up:
Removal and replacement or disinfection of contaminated soil or drainage ways is only performed when directed by the appropriate agencies (e.g., DEH, California Department of Fish and Wildlife, etc.).
A. Storm drain or drainage way:
1. Pump or vacuum out wastewater
2. Remove debris
3. Wash concrete and contain wash water, pump or vacuum out
4. Remove contaminated soil/plants
5. Remove all plugs/dams used to contain overflow
B. Street:
1. Remove debris
2. Wash pavement and contain wash water
3. Contain and transport wastewater by pumping or vacuuming VIII. Receiving Water Sampling – See Section 2.I.C.3.
Section 3 – Reporting Procedure
Certain overflows are required by law to be promptly reported to regulatory agencies. As described in the MRP, the timeframe for SSO reporting depends on the SSO category:
Category 1 and Category 2 – Must be reported to the CIWQS Online SSO Database as follows:
Draft reports will be submitted to the SWRCB CIWQS Online SSO Database within three (3) business days of the City becoming aware of the SSO.
ATTACHMENT 2
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09- reports\9.09-reports\apr-4\appendices\appendix a - oerp2014\_ssorp.doc 10 REV. 4/4/2014
A final report will be certified through the CIWQS Online SSO Database within 15 calendar days of the end date of the SSO.
Additional Reporting Requirements for Category 1 SSOs
The City will submit an SSO Technical Report in the CIWQS Online Database within 45 calendar days of the SSO end date for any SSO in which 50,000 gallons or greater are spilled to surface waters. Category 3 will be reported to the CIWQS Online SSO Database and certified within 30 calendar days after the end of the calendar month in which the SSO occurs (e.g., all Category 3 SSOs occurring in the month of February will be entered into CIWQS and certified by March 30).
PLSDs – Reported to the CIWQS Online SSO Database upon the City’s discretion. No Spill Certification – If there are no SSOs during the calendar month, the City will either:
Certify, within 30 calendar days after the end of each calendar month a “No Spill” certification statement in the CIWQS Online SSO Database certifying that there were no SSOs for the designated month; or
Certify, quarterly within 30 calendar days after the end of each quarter, “No Spill” certification statements in the CIWQS Online SSO Database certifying that there were no SSOs for each month in the quarter being reported on.
The designated staff will report as required above and continue with completing and processing the closure report as described below:
A. Review, complete and sign required reports:
1. Reportable SSO Field Report Form (Attachment II).
B. Documentation and Data Tracking:
1. Forward a copy of each signed report to the Collection System Supervisor for tracking and Sewer System Management Plan (SSMP) audits.
2. Assign each SSO Field Report Form with respective CIWQS ID number.
C. Review the SWRCB MRP Statewide General WDR for Wastewater Collection System Agencies to confirm the appropriate requirements are satisfied.
D. Reports and Data Capture:
Periodically, SSOs may occur in privately owned laterals. While the City is not legally required to respond to these SSOs, the City will use its resources to clean up the SSO if it flows onto public property. The Collection System Supervisor and City Staff decide whether or not to bill the owner for these City services.
1. Assure that appropriate documentation has been completed.
ATTACHMENT 2
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09- reports\9.09-reports\apr-4\appendices\appendix a - oerp2014\_ssorp.doc 11 REV. 4/4/2014
2. For “Private Lateral SSOs” provide copies of job-sheets/time-sheets to City staff.
E. Customer Satisfaction
City staff or maintenance worker may follow up in person or by telephone with interested citizen(s) who either reported the overflow or expressed concerns about public health or the environment. Document the discussion in a memo to the file and add SSO CIQWS identification number, date, person contacted, and phone number.
F. Media Notification Procedure
If an overflow affects surface water or private property, media notification may be necessary. The City Public Works Director or City designated representative determines if media notification is necessary. If so, the City will take the following steps:
The maintenance worker verifies the SSO and reports back to City staff, who then informs the Public Works Director;
The Public Works Director is the "first line" of response to the media for any SSO;
Calls received from the media at any time are referred to the Public Works Director; and
The Public Works Director or City designated representative is the only City representative authorized to be interviewed by the media. No other personnel are authorized to speak on behalf of the City unless authorized by the City Public Works Director.
Section 4 – Required Notifications (Not to be confused with Reporting) Effective September 9, 2013, an amendment by the SWRCB to the Monitoring and Reporting Requirements for Statewide General WDR for Sanitary Sewer Systems Order No. WQ 2013- 0058-EXEC was issued. The revised WDR stipulated the following notifications requirements be included in this SSORP:
For any Category 1 SSO greater than or equal to 1,000 gallons that results in a discharge to a surface water, either directly or by way of a drainage channel or MS4, the City will, as soon as possible, but not later than two (2) hours after:
The City has knowledge of the discharge,
Notification is possible, and
Notification can be provided without substantially impeding cleanup or other emergency measures,
notify the California Office of Emergency Services (OES) and obtain a notification control number.
ATTACHMENT 2
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09- reports\9.09-reports\apr-4\appendices\appendix a - oerp2014\_ssorp.doc 12 REV. 4/4/2014
SSO Tracking
All complaints, confirmed SSOs, and sanitary sewer system repairs will be recorded into the City’s CMMS database for Request for Service.
Staff and Contractor Personnel Awareness/Training
For construction projects that involve excavation in and around existing wastewater facilities, the appropriate City Staff and contractor personnel will be made aware of and follow the SSORP procedures by:
During the design process for sewer related projects the response plan will be part of the specifications.
For sewer related projects a pre-construction meeting will be held to emphasize important issues related to the project. One of the key points will be review of the SSO Response Plan.
Initial Training Program – City O&M Department for the Collection System and WQCF will review the SSO Response Plan and be trained to complete a SSO Field Report Form, notification procedure, protection procedures for City Staff, public, and environment, clean up procedures, and implementation plan to prevent future SSO events.
Training Program – City O&M Department Staff will be trained once per year on the SSO Response Plan elements.
New Employee Training – prior to starting work in the field for the City, each new employee will be required to review with their properly trained supervisor the SSO Response plan elements.
Key Staff
The key SSO response staff are listed in Attachment V.
ATTACHMENT 2
Figures
ATTACHMENT 2
Figure 1 - City of Manteca SSO Response Field and Reporting Procedures Flowchart Initial Notification of SSO by:
public, sanitary sewer worker, public
employee, contractor or other.
Wastewater Quality Control
Facility Staff
Is the SSO from City
Sewer or Private Sewer?
City Sewer or
Undetermined Private Sewer
Is SSO contained on
Private Property?
Yes
Enter
Receiving Water?
Maintenance Worker
Maintenance Worker
1. Notify Collection System Supervisor
2. Traffic Control, if necessary
3. Contain SSO
4. Correct Cause
Collection System Supervisor
Maintenance Worker
No
No Yes
Did SSO enter
Receiving Water from
land overflow?
Maintenance Worker
1. Notify Collection System Supervisor
2. Dam, if possible
3. Take Receiving Water samples
upstream and downstream of SSO
entry, if possible.
Collection System Supervisor
1. Notify Public Potential Health
& Environmental Hazard and
Regulatory agencies
2. Post Public Signs
3. Estimate Volume
Maintenance Worker
1. Notify Collection System Supervisor
2. Traffic Control, if necessary
3. Contain SSO; Dam, if possible
4. Correct Cause
5. Take Receiving Water
samples upstream and downstream
of SSO entry, if possible
Collection System Supervisor
Maintenance Worker
No
1. Initiate Clean up, if possible
2. Complete and Process
Closure Report
1. Notify Public Potential Health
& Environmental Hazard and
Regulatory agencies
2. Post Public Signs
3. Estimate Volume
Maintenance Worker
1. Initiate Clean up, if possible
2. Complete and Process
Closure Report
Maintenance Worker
1. Initiate Clean up, if possible
2. Complete and Process
Closure Report
1. Initiate Regulatory Notification
2. Estimate Volume
Reporting & Notifications
Reporting Notifications
Online SSO System (CWIQS)
Office of Emergency Services (OES)
Notified within 2 hours
Category 3 Private Lateral Sewer Discharge
(voluntary reporting at City Discretion)
Category 1 Category 2
Did 50,000 gallons
reach surface water? Yes No
Additional
Requirements
SSO Technical
Report
Water Quality
Monitoring Plan
Draft within 3-Business Days
Final within 15 Calendar Days Within 30 Calendar Days
1. Notify Property Owner
2. Complete SSO Report
Investigate and Assess
Category 1>= 1,000 gallons
reaches surface water or probably
discharged to surface water
Yes
No
Yes
ATTACHMENT 2
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09- reports\9.09-reports\apr-4\appendices\appendix a - oerp2014\figure_2.doc 1 REV. 4/4/2014
FIGURE 2
City of Manteca WQCF Sanitary Sewer Overflow Notification List Sanitary Sewer Overflow Response Plan
1. Within two hours of becoming aware of any Category 1 sanitary sewer overflow (SSO) greater than or equal to 1,000 gallons discharged to surface water or spilled in a location where it probably will be discharged to surface water, notify the California Office of Emergency Services (OES) and obtain a notification control number. Follow direction from the OES on additional agencies that may need to be contacted. Document direction issued by OES. Follow plan for written reporting per SSO Response Plan.
2. Required Notification Contact Phone Numbers (See Item 4 below for possible information required to report to OES):
Office of Emergency Services (OES), State Warning Center (800) 852-7550
3. Optional/Additional Notification Contact Phone Numbers:
South San Joaquin Irrigation District (SSJID),
Sam Bologna
(209) 249-4600
San Joaquin County Environmental Health Department,
front desk
(209) 468-3400
California Department of Health Services (DHS), Stockton, CA (Bhupinder Sahota as of February 2014)
(209) 948-7696
California Department of Fish and Wildlife, Rancho Cordova, CA (916) 445-0045 City of Manteca Police Department (209) 456-8100
San Joaquin County Sherriff’s Department (209) 468-4400 State of California Highway Patrol (209) 943-8600
Regional Water Quality Control Board (RWQCB),
(Mohammad Farhad as of February 2014)
(916) 464-1181
ATTACHMENT 2
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09- reports\9.09-reports\apr-4\appendices\appendix a - oerp2014\figure_2.doc 2 REV. 4/4/2014
4. Provide the requested information to OES; which may include the following information:
Name of person notifying OES and direct return phone number. Estimated SSO volume discharged (gallons).
If ongoing, estimated SSO discharge rate (gallons per minute). SSO Incident Description:
▪ Brief narrative.
▪ On-scene point of contact for additional information (name and cell phone number). ▪ Date and time enrollee became aware of the SSO.
▪ Name of sanitary sewer system agency causing the SSO. ▪ SSO cause (if known).
Indication of whether the SSO has been contained.
Indication of whether surface water is impacted.
Name of surface water impacted by the SSO, if applicable. Indication of whether a drinking water supply is or may be impacted by the SSO. Any other known SSO impacts.
SSO incident location (address, city, state, and zip code).
ATTACHMENT 2
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Ú3
Ú3
Ú3
Ú3
Ú3
Ú3Ú3
Ú3
Wastewater Quality
Control Facility
Garden
Gate
Assieh Development
MUSD
Centerpoint
Bella
Vista
Chadwick U5
Fishback
Roberts
Estates
Villa
Ticino
Woodbridge Park
Woodward
Park
Northgate
Park
Frito Lay
River
Outfall
Evans Solera
WOODWARD &
GALLERIA
Sources: Esri, HERE, DeLorme, USGS, Intermap, INCREMENT P, NRCan, Esri Japan, METI, Esri China (Hong Kong), Esri Korea, Esri (Thailand), MapmyIndia, NGCC, © OpenStreetMap contributors, and the GIS User Community Document Path: \\sfoisgdata\Z_Drive\Projects\MantecaSSMP\Events\2019Update\Figure3_Stormwater.mxd City of Manteca
Sewer System Management Plan
Existing Sewer Collection and
Existing Stormdrain System
K/J 1970006.00
October 2019
Figure 3
Kennedy/Jenks Consultants
q
0 1,500 3,000
Feet
Legend Ú3 Storm Drain - Pump Station "/ Storm Drain - Lift Station #* Storm Drain - Air Release Valve ") Storm Drain - Catch Basin ") Storm Drain - Drop Inlet !( Storm Drain - Manhole !. Storm Drain - Treatment !. Storm Drain - Treatment Private "/ Flushing Station ä[ Lift Station ä[ Lift Station - Private !( Sanitary Sewer - Manholes #* Sanitary Sewer - Air Release Valve !? Sanitary Sewer - Cleanout $1 Sanitary Sewer - Lamp Hole Storm Drain - Force Main
Storm Drain - Gravity Main
Storm Drain - Lateral
Subdrain, City
D D D D D D D Sanitary Sewer - Force Main, Abandoned
Sanitary Sewer - Force Main
D D D D D D D Sanitary Sewer - Gravity Main, Abandoned
Sanitary Sewer - Gravity Main
Sanitary Sewer - Gravity Main, Private
![ SCADA ^_ SCADA SENSOR
Waterbody
Estuary
Ice Mass
Lake Pond
Playa
Reservoir
SwampMarsh
Waterways
ArtificialPath
CanalDitch
Coastline
Connector
Pipeline
StreamRiver
Underground Conduit
Blind Areas
City Boundary
ATTACHMENT 2
Attachment I
Request for Service Form
ATTACHMENT 2
ATTACHMENT 2
ATTACHMENT 2
Attachment II
(Sample) SSO Field Report Form
ATTACHMENT 2
(Sample) SSO Field Report Form
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09- reports\apr-4\appendices\appendix a - oerp-2014\ii-(sample) sso field report form_4.4.14.doc
1 REV. 4/4/2014
CITY OF MANTECA
SANITARY SEWER OVERFLOW (SSO) FIELD REPORT FORM
ALL ITEMS MUST BE COMPLETED
General Information
1. SSO Event ID No (Issued automatically by CIWQS): - -________ 1a. Customer Service Call Number:___________________________________________
2. Call Received From:___________________________________________________
3. Date Received: _____/_____/_____ (MM/DD/YY)
4. Time Received: _____:_____ (24-Hour Time)
5. Report Filled Out By:____________________ Phone Number (_____)_____-______ Section A. Physical Location Details (REQUIRED FOR CATEGORIES 1, 2, & 3 SSOS)
1. Spill Location Name:____________________________________________________ (If the overflow did not occur at a street location, then use other identifiers such as intersection or manhole number)
2. Latitude: _____ deg. _____ min. _____ sec or _____ decimal degrees
3. Longitude:_____ deg. _____ min. _____ sec or _____ decimal degrees
4. Street Type: □ Alley, □ Avenue, □ Boulevard, □ Circle, □ Freeway, □ Highway, □Lane, □Loop, □ Trail, □ Other ___________________
5. Cross Street:__________________________________________________________
6. City:______________________
7. County:__________________
8. Spill Location Description:________________________________________________ _____________________________________________________________________ _____________________________________________________________________ _____________________________________________________________________
9. Regional Water Quality Control Board:
ATTACHMENT 2
(Sample) SSO Field Report Form
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09- reports\apr-4\appendices\appendix a - oerp-2014\ii-(sample) sso field report form_4.4.14.doc
2 REV. 4/4/2014
Section B. Spill Details
1. Number of Appearance Points:_________
2. Spill Appearance Point:
□Building or Structure
□Force Main or Pressure Sewer
□Gravity Sewer
□ Manhole
□Other Sewer System Structure
□Pump Station
□Other (specify)
3. Did the spill discharge to a drainage channel and/or surface water? □ Yes □ No
4. Did the spill discharge to a storm drainpipe that was not fully captured and returned to the sanitary sewer system? □ Yes □ No
5. Private lateral spill? □ Yes □ No
6. Name of Responsible Party (if private lateral) _________________________________
7. Final spill destination(check multiple if necessary):
□Beach
□Building or structure
□Other paved surface
□Storm drain
□Street/curb and gutter
□Surface Water
□ Unpaved surface
□Other (specify)
a. Explanation of final spill destination
b. Did spill create a nuisance (e.g., traffic or pedestrian impacts, private or public property impacts, etc.)? □ Yes □ No
8. Estimated total spill volume (gallons):___________________ a. Volume that reached a separate storm drain that flows to a surface water body? ________gallons
b. Volume that reached a drainage channel that flows to a surface water body? ________gallons
c. Volume discharged directly to a surface water body? ________gallons d. Volume discharged to land (e.g., soil, grass, curb, street, etc.)? ________gallons
9. Estimated total spill volume recovered (gallons):
ATTACHMENT 2
(Sample) SSO Field Report Form
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09- reports\apr-4\appendices\appendix a - oerp-2014\ii-(sample) sso field report form_4.4.14.doc
3 REV. 4/4/2014
a. Volume recovered from the separate storm drain that flows to a surface water body (Do not include wash water recovered)? ________gallons b. Volume recovered from a drainage channel that flows to a surface water body? ________gallons
c. Volume recovered from the surface water body? ________gallons d. Volume recovered from the discharge to land? ________gallons
10. Estimated volume of spill that reached surface water, drainage channel, or not recovered from a storm drain (gallons):
11. Estimated current spill rate (gallons per minute, if applicable):
12. Estimated spill start Date/Time:_____/_____/____ (MM/DD/YY) _____:_____ (24:00) a. Explanation of volume estimation methods used:
Provide diagrams and/or photographs of spill incident. Include details that will help explain how overflow volume was determined.
13. Sanitary sewer system agency was notified of or discovered spill Date/Time:
_____/_____/_____ (MM/DD/YY) _____:_____ (24:00)
14. Estimated Operator arrival Date/Time: _____/_____/____ (MM/DD/YY) _____:_____ (24:00)
15. Estimated spill end Date/Time: _____/_____/____ (MM/DD/YY) _____:_____ (24:00)
16. Spill cause:
□ Debris
□Flow exceeded capacity
□Grease deposition (FOG)
□Operator error
□Pipe structural problem/failure
□Pump station failure
□ Rainfall exceeded design
□ Root intrusion
□Vandalism
□Other (specify)
a. Spill cause explanation
b. Where did failure occur?
c. Explanation of where failure occurred
ATTACHMENT 2
(Sample) SSO Field Report Form
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09- reports\apr-4\appendices\appendix a - oerp-2014\ii-(sample) sso field report form_4.4.14.doc
4 REV. 4/4/2014
17. If spill caused by wet weather, choose storm size:
□1 Year
□2 Year
□5 Year
□10 Year
□50 Year
□100 Year
□>100 Year
□ Unknown
□ Number of inches in time (hours or minutes)
a. Was there measurable precipitation during the 72-hour period prior to the overflow? □ Yes □ No
18. Diameter of sewer pipe at the point of blockage or spill cause (inches, if applicable):
19. Material of sewer pipe at the point of blockage or spill cause (if applicable):
20. Estimated age of sewer pipe at the point of blockage or spill cause (if applicable):
21. Description of terrain surrounding the point of blockage or spill cause (if applicable):
□Flat □ Mixed □Steep
QUESTIONS 22-33 FOR CATEGORY 3 NOT REQUIRED (SKIP TO SECTION C)
22. Spill response activities (check multiple if necessary):
□ Cleaned-up (mitigated spill effects)
□ Contained all or portion of spill
□Inspected sewer using CCTV to
determine cause
□ Restored flow
□ Returned all or portion of spill to
sanitary sewer system
□Other (specify)
a. Explanation of spill response activities
ATTACHMENT 2
(Sample) SSO Field Report Form
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09- reports\apr-4\appendices\appendix a - oerp-2014\ii-(sample) sso field report form_4.4.14.doc
5 REV. 4/4/2014
23. Spill response completion Date/Time: _____/_____/____ (MM/DD/YY) _____:_____ (24:00)
24. Spill corrective action taken (check multiple if necessary):
□Added sewer to preventive maintenance program
□Adjusted schedule/method of preventive maintenance
□Enforcement action against FOG source
□Plan rehabilitation or replacement of sewer
□ Repaired sewer
□Other(specify)
a. Explanation of spill corrective action taken
QUESTIONS 25-33 FOR CATEGORY 2 NOT REQUIRED (SKIP TO SECTION C)
25. Visual inspection results from impacted receiving water:
26. Health warnings posted? □ Yes □ No
26a. If health warnings posted, list the location(s) of posting:
_________________________________________________________________ _________________________________________________________________
27. Did the spill result in a beach closure? □ Yes □ No a. Name of impacted beach(es) (if applicable):
28. Name of impacted surface water(s) (if applicable):
29. Is there an ongoing investigation? □ Yes □ No
a. Describe Ongoing Investigations:
30. Were samples of the contamination receiving water obtained? □ Yes □ No ATTACHMENT 2
(Sample) SSO Field Report Form
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09- reports\apr-4\appendices\appendix a - oerp-2014\ii-(sample) sso field report form_4.4.14.doc
6 REV. 4/4/2014
30a. If samples were obtained, list the location(s) in relation to point of entry ___________________________________________________________________ 30b. If samples were obtained, who obtained the samples?__________________ 30c. Samples Delivered to for Testing:
____________________________________________________
30d. Chain of Custody number for samples: ___________________________ and Date: _____/_____/____ (MM/DD/YY)
31. Water quality samples analyzed for (check multiple if necessary):
□ Dissolved oxygen
□Other chemical indicator(s) (specify)
□Biological indicator(s) (specify)
□ No water quality samples taken
□ Not applicable to this spill
□Other (specify)
a. Explanation of water quality samples analyzed for
32. Water quality sample results reported to (check multiple if necessary):
□ County Health Agency
□ Regional Water Quality Control Board
□ None of the above
□ No water quality samples taken
□ Not applicable to this spill
a. Explanation of water quality samples reported to
33. Overall spill description:
ATTACHMENT 2
(Sample) SSO Field Report Form
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09- reports\apr-4\appendices\appendix a - oerp-2014\ii-(sample) sso field report form_4.4.14.doc
7 REV. 4/4/2014
Section C. Notification Details
1. California Office of Emergency Services(OES) Control Number:
_____________________________________________________________________
2. Cal OES Called Date/Time: _____/_____/____ (MM/DD/YY) _____:_____ (24:00)
3. County health agency notified? □ Yes □ No
4. County health agency notified Date/Time: _____/_____/____ (MM/DD/YY) _____:_____ (24:00)
5. Regional Water Quality Control Board (RWQCB) notified? □ Yes □ No
6. RWQCB notified Date/Time: _____/_____/____ (MM/DD/YY) _____:_____ (24:00)
7. Other agency notified? □ Yes □ No If yes, Name of agency ___________________
8. Other agency notified Date/Time: _____/_____/____ (MM/DD/YY) _____:_____ (24:00)
9. Was any of this spill report information submitted via fax to the Regional Water Quality Control board? □ Yes □ No
10. RWQCB faxed spill report information Date/Time: _____/_____/____ (MM/DD/YY) _____:_____ (24:00)
Section D. Cost Recovery (FOR CITY USE ONLY)
Was the SSO from a private system or caused by an outside agency, contractor or person? □ Yes □ No (If ‘Yes’, continue filling in as much information as possible.) □ The SSO was from a private system.
□ The SSO was caused by an activity being performed by an outside:
□ Agency □ Contractor □ Person □ Other _____________
ATTACHMENT 2
(Sample) SSO Field Report Form
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09- reports\apr-4\appendices\appendix a - oerp-2014\ii-(sample) sso field report form_4.4.14.doc
8 REV. 4/4/2014
Name of complex, agency, contractor or person:________________________________ Address of complex, agency, contractor or person:______________________________ ______________________________________________________________________ Name of insurance company, agent’s name and phone number, if known:
______________________________________________________________________ Name of person providing information:________________________________________ Name and phone number of any witness(es):
______________________________________________________________________ ______________________________________________________________________ ______________________________________________________________________ ATTACHMENT 2
Attachment III
SSO Flow Estimation Pictures
ATTACHMENT 2
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09-reports\9.09-reports\oerp-2014\iiia-sso flow est pics.doc DRAFT – REV. 2/21/2014 Reference Sheet for Estimating Sewer Spills
from Overflowing Sewer Manholes
All estimates are calculated in gallons per minute (gpm)
ATTACHMENT
2 g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09- reports\9.09-reports\oerp-2014\iiib-sewer spill estimation.doc DRAFT – REV. 2/21/2014 Sewer Spill Estimation
EXAMPLE 1: To calculate the estimated amount of gallons in a ponded sewage spill you must determine the volume of the spill. If it is a rectangular contained area, Volume = Length x Width x Depth x 7.48 gallons/cu. ft. = Gallons A spill 100’ x 100’ x 6” x 7.48 gal/cu. ft. = 100’ x 100’ x 0.5’ x 7.48 gal/cu. ft. = 37,400 gal See illustration below for estimating the volume of a circular ponded area.
EXAMPLE 2: If you are dealing with a spill that has been running into a storm drain, you must estimate the gallons by the amount of time of the overflow times the number of connections on the receiving line (assume 240 gal per household per 24 hrs).
If you have a line with 6 houses on it, and it has been overflowing for 24 hrs:
6 houses x (240 gal/house) x 24 hours = 1,440 gal
EXAMPLE 3a: If the overflow is less than 24 hours in duration, then the calculation must prorate the daily sewage generation rate. If you have 60 houses on a line that has been overflowing for 1 hr:
60 houses x (240 gal/day/house) x 1 hr x (1day/24hr) = 600 gal EXAMPLE 3b: If you have 6 houses on a line that has been overflowing for 12 hours:
6 houses x (240 gal/day/house) x 12 hrs x (1day/24hr) = 720 gal EX. 1a – Rectangular: EX. 1 b – Circular:
100 FT 100 FT
1 1
0 0
0 0
F F
T T
V. = 100’ x 100’ x 0.5’ x 7.48 V. = 100’ x 100’ x 0.5’ x 0.8* x 7.48 = 37,400 gal = 29,900 gals
*Factor for estimating area of a circle
as a portion of the area of a square.
ATTACHMENT 2
g:\adminasst\jobs\2012\1270003.00_manteca ssmp update\09- reports\9.09-reports\oerp-2014\iiib-sewer spill estimation.doc DRAFT – REV. 2/21/2014 Note that the time of day of the overflow should be considered in the calculation of its volume especially if the land use of the tributary area to the overflow is predominantly residential. Over 90% of the daily sewage discharge from an average home occurs between the hours of 6 am and 12 midnight with 50-75% of the daily sewage discharge occurring between 8 am to noon and 7 pm to 11 pm (“diurnal peak hours”). This could result in a flow rate of 15 to 22.5 gal/hr during the diurnal peak hours vs. 10 gal/hr (average) over 24 hours.
If there is mixed land use tributary to an overflowing sewer, the following unit flow rates should be used in addition to the residential, as appropriate: hotel/motel – 100 gpd/room; restaurant - 55 gpd/seat; business offices - 175 gpd/1000 sq. ft.; and commercial/retail - 75 gpd/1000 sq.ft.
Wet weather conditions could further affect the per home daily sewage contribution due to infiltration and inflow (I/I) sources.
ATTACHMENT 2
Attachment IV
City of Manteca Chain-of-Custody Record and Analysis Request ATTACHMENT 2
Laboratory Chain of Custody
Submission:
2450 W. Yosemite Ave., Manteca, CA 95337
Client Report Attention PhoneAddress Project Name: FAXCity, State, Zip Copy to: System # Sampled by: Project ID
Date Time
Received / Reliquished by:Received / Reliquished by:Received / Reliquished by:Received / Reliquished by:Received / Reliquished by:
Signature Print Name Company Date Time
City of Manteca
Sampling Info
Sample Description / Location Comment or Station Code
G:\AdminAsst\Jobs\2012\1270003.00_Manteca SSMP Update\09-Reports\9.09-Reports\OERP-2014\IV-Chain of Custody Form DRAFT - REV. 2/21/2014
ATTACHMENT
2 Attachment V
City of Manteca Key Personnel
ATTACHMENT 2
REV 10/2019
City of Manteca Key Sanitary Sewer Overflow Response Staff Wastewater Quality Control Facility (209) 456-8470
WQCF Collections System Supervisor (209) 456-8472
(209) 496-4991
WQCF Chief Plant Operator (209) 456-8486
WQCF Superintendent (209) 456-8473
Maintenance Workers
Lead Maintenance Worker (209) 639-4886
Maintenance Worker I (209) 639-4886
Maintenance Worker II (209) 639-4886
Maintenance Worker III (209) 639-4886
Standby Worker (209) 639-4892
ATTACHMENT 2
Appendix B
City Ordinance
ATTACHMENT 2
Manteca Municipal Code
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Title 13 PUBLIC SERVICES
Chapter 13.12 SEWER CONNECTION CHARGES
13.12.010 Sewer connection charges.
Sewer connection charges are established in the amounts set forth in this chapter for the privilege of connecting to the sanitary sewer system of the city. (Prior code § 14-7)
13.12.055 Additional connection charge.
A. Each residential dwelling utilizing Phase 3 wastewater treatment capacity and each commercial, industrial and institutional facility shall pay a sewer connection charge as follows:
LAND USE CHARGE
Residential
Very Low Density $3,961 per unit
Low Density $3,961 per unit
Medium Density $3,301 per unit
High Density $3,301 per unit
Commercial
Office Professional $1,493 per 1,000 sq. ft.
Neighborhood/Community Commercial $1,640 per 1,000 sq. ft.
Business/Visitor Services $1,640 per 1,000 sq. ft.
General Commercial $1,640 per 1,000 sq. ft.
Commercial Recreation $1,640 per 1,000 sq. ft.
Light Industrial $1,692 per 1,000 sq. ft.
Heavy Industrial $1,692 per 1,000 sq. ft.
B. The connection charges specified in subsection A shall be subject to payment in accordance with Section
13.12.070 of this chapter. Nonpayment of such charge may result in disconnection in accordance with Section 13.12.080 of this chapter. All revenue derived from the connection charges provided by this section shall be used for the Manteca wastewater quality control facility Phase 3 upgrade and expansion project. (Ord. 1518 § 2, 2013; Ord. 1294 § 2, 2005; Ord. 1244 § 2, 2003)
13.12.057 WQCF Phase 3 completion charge.
A. In addition to the sewer connection charges provided by Section 13.12.055 of this chapter, each residential dwelling utilizing WQCF Phase 3 wastewater treatment capacity and each commercial, industrial and institutional facility shall pay a sewer connection charge as follows:
Land Use WQCF Phase 3 Completion
Charge Basis on Which Charged
Residential
Very Low Density $2,003 per unit
Low Density $2,003 per unit
ATTACHMENT 2
Medium Density $1,802 per unit
High Density $1,802 per unit
Commercial
Office Professional $815 per 1,000 sq. ft.
Neighborhood/Community Commercial $895 per 1 000 sq. ft.
Business/Visitor Services $895 per 1 000 sq. ft.
General Commercial $895 per 1,000 sq. ft.
Commercial Recreation $895 per 1 000 sq. ft.
Light Industrial $924 per 1,000 sq. ft.
Heavy Industrial $924 per 1,000 sq. ft.
B.
The connection charge specified in subsection A of this section shall be subject to payment in accordance with Section 13.12.070 of this chapter. Nonpayment of such charge may result in disconnection in accordance with Section
13.12.080 of this chapter. All revenue derived from the connection charge provided by this section shall be used for the Manteca wastewater quality control facility Phase 3 upgrade and expansion project. (Ord. 1518 § 3, 2013; Ord. 1411 § 2, 2009)
13.12.070 Payment.
A. Except as provided in subsection C, connection charges shall be due and payable at the time building permits are obtained or, when no building permit is required, prior to actual connection to the city system. For mobile home parks, connection charges shall be paid prior to the time of first connection for the total number of mobile home spaces permitted by the terms of the use permit.
B.
The charges paid shall be the charge that is applicable at the time the permit is obtained or connection is made.
C. Connection charges for residential dwellings existing and lawfully occupied as of July 1, 1991 within the city limits may be paid over a five-year period (twenty percent of the charge each year) where the dwelling is owneroccupied at the time of the application for connection and the household income for the occupants of the dwelling does not exceed the moderate income level designated by the income standards used by the county in administering community development block grant funding in effect at the time of application. In such cases, the first payment shall be made at the time of actual connection to the city system and the remaining payments shall be due annually on the anniversary date of the connection. (Ord. 905 § 1, 1991; Ord. 884 § 1, 1990; prior code § 14-7.6)
13.12.080 Disconnection for nonpayment.
The city may disconnect any facility from the sewer system if connection was made without city permission and without the payment of the appropriate connection charge. The cost to the city of disconnection shall be paid in addition to connection charges prior to reconnection. (Prior code § 14-7.8)
13.12.090 Revenue use.
All revenue derived from connection charges shall be deposited in the capital improvement fund and used for the acquisition, construction, reconstruction, reimbursement, maintenance and operation of the sanitary sewer and treatment system of the city. (Prior code § 14-7.9)
ATTACHMENT 2
Manteca Municipal Code
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Title 13 PUBLIC SERVICES
Chapter 13.14 SEWER CAPACITY CHARGES
13.14.010 Pestana Avenue sewer capacity charges.
Those property owners who are served by the Pestana Avenue sewer trunk line shall pay a sewer capacity charge in the amount set forth in the Table of Pestana Avenue Sanitary Sewer Capacity Charges adopted by the city council and on file in the department of public works. (Ord. 1008 § 2, 1994)
13.14.020 Collection of capacity charges.
Capacity charges required pursuant to Section 13.14.010 shall be due and payable at the time that a building permit is obtained for a building that will connect to the Pestana Avenue sewer. However, if no capacity charge was paid at the time that a building permit was issued for a building that will connect to the Pestana Avenue sewer, then the capacity charge will be paid prior to actual connection to the Pestana Avenue sewer. For mobile home parks, capacity charges for the total number of mobile home spaces shall be paid prior to the time of the connection of the first space to the Pestana Avenue sewer.
The capacity charge shall be paid in the amount that is in effect at the time of payment. (Ord. 1008 § 2, 1994)
13.14.030 Adjustment.
Capacity charges shall be adjusted on January 1st of each year based upon the change to the Twenty-City Engineering NewsRecord Construction Costs Index. The adjusted capacity charges shall be calculated by the public works director using the following formula:
Adjusted capacity charge =
(Capacity charge set forth in the Table of
Pestana Avenue Sanitary Sewer Capacity
Charges)
X
(ENR index for January 1st
ENR index of 5070.66 for
January, 1993)
The adjusted capacity charge shall be rounded to the nearest dollar. (Ord. 1008 § 2, 1994) ATTACHMENT 2
Manteca Municipal Code
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Title 13 PUBLIC SERVICES
Chapter 13.16 SEWER SERVICE CHARGES
13.16.010 Monthly rates.
Customers of the city’s sewer collection and treatment system shall pay monthly charges as follows:
Rate Category
Jan. 1, 2009
through
Dec. 31, 2009
Jan. 1, 2010
through
Dec. 31, 2010
Jan. 1, 2011
through
Dec. 31, 2011
Jan. 1, 2012
through
Dec. 31, 2012
Jan. 1, 2013 and
Thereafter
Basis on Which
Rates Charged
Residential and
equivalents $39.50 $43.30 $43.30 $43.30 $43.30 per unit Trailer park $33.36 $36.57 $36.57 $36.57 $36.57 per 1,000 CF Rooming houses $25.26 $27.70 $27.70 $27.70 $27.70 per 1,000 CF Commercial/retail $28.24 $30.96 $30.96 $30.96 $30.96 per 1,000 CF Hotel/motel $30.84 $33.81 $33.81 $33.81 $33.81 per 1,000 CF Hotel/motel w/kitchen $56.47 $61.89 $61.89 $61.89 $61.89 per 1,000 CF Car washes/ laundromats $22.37 $24.53 $24.53 $24.53 $24.53 per 1,000 CF Service stations (metered) $31.05 $34.04 $34.04 $34.04 $34.04 per 1,000 CF Office/light industrial $23.12 $25.35 $25.35 $25.35 $25.35 per 1,000 CF Restaurants $66.09 $72.42 $72.42 $72.42 $72.42 per 1,000 CF Markets $68.85 $75.45 $75.45 $75.45 $75.45 per 1,000 CF Mortuaries $68.85 $75.45 $75.45 $75.45 $75.45 per 1,000 CF Hospitals $29.82 $32.69 $32.69 $32.69 $32.69 per 1,000 CF Elementary schools $21.94 $24.06 $24.06 $24.06 $24.06 per 1,000 CF Secondary schools $21.94 $24.06 $24.06 $24.06 $28.71 per 1,000 CF Churches $26.18 $28.71 $28.71 $28.71 $28.71 per 1,000 CF Nonprofit $25.37 $27.82 $27.82 $27.82 $27.82 per 1,000 CF Commercial mixed use $36.70 $40.23 $40.23 $40.23 $40.23 per 1,000 CF Rate Category
Jan. 1, 2009
through
Dec. 31, 2009
Jan. 1, 2010
through
Dec. 31, 2010
Jan. 1, 2011
through
Dec. 31, 2011
Jan. 1, 2012
through
Dec. 31, 2012
Jan. 1, 2013 and
Thereafter
Basis on Which
Rates Charged
Industrial
flow $1,841.15 $2,023.24 $2,023.24 $2,023.24 $2,023.24 per MG biochemical oxygen
demand (BOD) $0.368 $0.404 $0.404 $0.404 $0.404 per lb
suspended solids (SS) $0.696 $0.765 $0.765 $0.765 $0.765 per lb nitrogen (N) $2.608 $2.866 $2.866 $2.866 $2.866 per lb
Septage $150.76 $165.16 $165.16 $165.16 $165.16 per 1,000 gallons ATTACHMENT 2
City of Lathrop per contract
Raymus Village per contract
(Ord. 1515 § 2, 2012; Res. R2011-221; Res. R2010-268; Ord. 1410 § 2, 2008; Ord. 1242 § 1, 2003; Ord. 1155 § 1, 2000; Ord. 916 § 1, 1991; Ord. 817 § 1, 1988; Ord. 794 § 1, 1988; Ord. 788 §§ 1-3, 1988; Ord. 770 § 1, 1987; prior code § 14-8)
13.16.011 Industrial sewer service charge for Eckert Cold Storage.
A. Effective December 1, 2013, the industrial sewer service charge for Eckert shall be as provided in subsections B through D of this section.
B. The variable charge is the sum of: (1) the actual electricity costs for the Moffat Boulevard pump station, the pond pump station and the pond aerator system; (2) the actual wastewater laboratory testing costs for the industrial sewer system; and (3) the actual odor control chemical costs for the industrial sewer system. Variable charges are payable each month and are based on actual usage. For calendar year 2013, the variable charges billed on December 1, 2013, or as soon thereafter as practicable, shall be the actual variable costs for January 1, 2013 through November 30, 2013, less any actual variable costs paid by Eckert for January 1, 2013 through November 30, 2013. For December 2013 and for calendar years 2014, 2015 and thereafter, variable charges shall be billed monthly based on the previous month’s actual costs.
C. The fixed charge is an annual charge that is based on estimated operations, maintenance and replacement costs.
The annual fixed charge is ninety-six thousand seven hundred ten dollars for 2013, ninety-nine thousand four hundred eighty-two dollars for 2014 and one hundred two thousand three hundred thirty-five dollars for 2015 and thereafter. The total annual fixed charge for 2013 is payable on December 31, 2013. The annual fixed charge for 2014, 2015 and thereafter is payable in six equal installments on the first business day of each month, beginning in June and ending in November of each year.
D.
In any calendar year in which Eckert does not discharge industrial wastewater to the industrial sewer system or the modified industrial sewer system due to acts of God, acts of a government, fires, floods, epidemics, quarantine restrictions, strikes, earthquakes, explosion or any similar catastrophic event or occurrences beyond the control of Eckert, the city shall determine the fixed charge per the following formula:
Fixed Charge in
Calendar Year of
Catastrophe
= Fixed Charge X
Actual days discharged in calendar year of
catastrophe
Average total days discharged in
immediately preceding three consecutive
calendar years
(Ord. 1534 § 2, 2013; Ord. 1469 § 1, 2010; Ord. 1439 § 2, 2009)
13.16.015 Senior citizen rebates.
A. A senior citizen shall be defined as a resident who is age sixty or older.
B.
Low-income senior shall be defined as a senior citizen whose combined family income does not exceed fifty percent of the medium income for San Joaquin County, according to the income limitations for the Federal Community Development Block Grant (CDBG) and Home Investment Partnership Act (HOME) programs.
C. The amount of the rebate shall be five dollars per month per unit, which will be credited annually to the billed customers. Credits will cover the fees charged in a fiscal year. This credit becomes effective February 1, 2004.
D.
In order to qualify for the rebate, the qualifying low-income senior must provide the following:
1. A copy of the most recent 1040 federal income tax form demonstrating income eligibility and/or social security annual statement;
2. A signed affidavit provided by the city ensuring that all information provided is accurate and complete;
3. In the event the low-income senior does not have a utility account established with the city because the sewer charges ATTACHMENT 2
are paid as part of a multi-unit meter, the property manager and/or owner responsible for the utility account will collect the signed low-income forms from the individuals and submit them to the city finance department. This credit will be applied to the multi-unit account. The property manager and/or owner are/is responsible to pass on the credit to the eligible senior. It is unlawful and a misdemeanor for any person to violate this provision.
E. Documentation noted above shall be provided to the city no later than July 15th of each year. The city will have sixty days from this date to apply the credit to the account.
F. Customers who cancel their services prior to the July 15th deadline may request a rebate. The noted documents above need to be submitted along with their request to cancel the services. The credit will be applied to their final utility billing. This provision shall not apply to multi-unit customers. (Ord. 1256 § 1, 2004)
13.16.020 Billing—Collection.
A. The charges fixed in this chapter for any premises shall be billed and collected with the charges and rates for city utility services furnished by the city to such premises. Such charges fixed in this chapter shall be due and payable in advance at the same time that such charges for city utility services are due and payable.
B. In the event the premises to be charged for sewer service are not connected to the city water distribution system, then, and in that event, the city water department shall bill and collect for the appropriate sewer service charges.
C. All sewer service revenues collected shall be retained by the city regardless of the date of termination of sewer service and no rebates will be made for midmonth disconnection.
D.
If the monthly service rate is not paid when due, on the first day of each calendar month thereafter a penalty of two percent of the amount of the delinquent rate shall be added. (Ord. 1410 § 3, 2008; Ord. 1184 § 1, 2001; prior code § 14-9)
13.16.030 Delinquent charges—Lien.
Charges for services and facilities furnished by the city shall constitute a lien against the lot or parcel of land against which such charge is imposed if such charges remain delinquent for a period of sixty days. (Prior code § 14-10)
13.16.040 Discontinuance of service.
A. In the event the owner, occupant or lessee of premises connected to the sewer system shall fail to pay the sewer service charges provided in this chapter by the fifteenth day of the month following presentation of a bill therefor, the city may in addition to all of the remedies it may have, discontinue furnishing sewer service by means of water service disconnection, and shall not resume the same until all delinquent charges and penalties under this chapter together with any service charge necessitated by the resumption of sewer service have been fully paid. However, service to delinquent customers will not be shut off until the customer is first notified of the intended shut off and given an opportunity for a hearing on the matter.
B.
As an alternative to any of the other procedures provided in this chapter or given by law, the city may bring an action against the owner, occupant or lessee of the premises to whom the service was rendered for the collection of the amount of the delinquent rate and all penalties and costs of collection including a reasonable attorney’s fee. (Ord. 775 § 12(part), 1987; prior code § 14-11)
13.16.050 Privately owned water system—Charge.
In any case where rates are based on water used and the premises are not connected to the city water system, then, in such case, all unmetered water service which flows from a privately owned water system shall be estimated by the city or measured by a meter approved by the city to be furnished and installed by the user, and a sewer service charge will be applied which will be equivalent to that which would be applied if the water were being purchased from the city. (Ord. 775 § 12(part), 1987; prior code § 14-12)
ATTACHMENT 2
ATTACHMENT 2
Manteca Municipal Code
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Title 13 PUBLIC SERVICES
Chapter 13.20 INDUSTRIAL WASTE
13.20.010 Purpose.
A. The city of Manteca does ordain that this chapter shall be known as the “City of Manteca Industrial Waste Ordinance (Waste Ordinance)” and may be so cited.
B. This chapter is adopted pursuant to provisions of California Government Code 54725 and modifications and inclusions of Senate Bill 10.24.
C. This chapter sets forth the uniform requirements for direct and indirect contributors to the Manteca water pollution control system, and enables the city of Manteca to protect its collection, treatment, pumping, and disposal systems and to comply with all state and federal laws.
D. Objectives. The objectives of this chapter are to:
1. To prevent the introduction of pollutants into the Manteca water pollution control system that will interfere with the operation of the POTW, including the land disposal facilities.
2. To prevent the introduction of pollutants into the Manteca water pollution control system that could cause pass-through into receiving waters, the atmosphere, or otherwise be incompatible with the POTW systems.
3. To regulate the acceptance of wastes to:
a.
Protect the physical structures of the water pollution control system and the efficient functioning of its component parts.
b.
Protect the health and safety of the personnel of the city of Manteca and its member jurisdictions, and to preserve the health and safety of the public.
c.
Comply with all of the applicable and compatible local, state of California, and federal laws, rules, regulations, codes, or orders.
d.
Protect the environment from threat of hazard or harm resulting from the disposal of wastes.
E. Applicability. The requirements of this chapter are applicable to all persons within the city of Manteca, and to all persons outside the city of Manteca who are, by contract, agreement or action, users of the city of Manteca water pollution control system; including any and all new and prospective users and any and all existing users.
F.
The director of public works for the city of Manteca shall administer, implement, and enforce the provisions of this chapter. (Ord. 1275 § 2 (part), 2004)
13.20.020 Definitions and abbreviations.
A. List of Definitions.
“Act” means any regulation contained in or amendment of the Clean Water Act. “Additional inclusions” means violations of compliance schedule milestones, by ninety days or more after the schedule date; failure to provide reports within thirty days from the due date; failure to accurately report noncompliance; and any other violation or group of violations that Manteca considers to be significant. “Administrative order” means an enforcement document which directs industrial users to implement corrective or remedial measures. Levels of enforcement include: cease and desist orders, compliance orders, and show cause orders.
“Agent” means any person designated or retained by Manteca to fulfill the sampling, monitoring, reporting, or inspection services of Manteca as required by this chapter, the industrial discharge permit and/or all applicable state, federal, or local regulations, and/or to perform the enforcement actions required by this chapter. Agents may include, but are not limited to, any of the following: the Manteca director of public works, assistant director of ATTACHMENT 2
public works, inspector, supervisor, and city attorneys, and any consultant retained by the city to perform such services.
“Approval authority” means the California Regional Water Quality Control Board, Central Valley Region. “Assistant director of public works” means the assistant director of public works for the city of Manteca or his or her agent.
“Authorized representative of the industrial user” means an authorized representative of an industrial user shall be:
a principal executive officer of at least the level of vice president, a general partner or proprietor of the user, or a duly authorized representative of the person holding the industrial discharge permit, if such representative is responsible for the overall operation of the industrial facilities from which the discharge originates. The authorized representative shall be identified on the Industrial Discharge Permit. “Categorical user” means any industrial user who, on the basis of the industrial activity at the facility in question, must comply with national categorical standards.
“Cease and desist order” means an administrative order issued by Manteca requiring a discharger to halt discharge to the water pollution control system.
“Chronic violation” means a violation of significant noncompliance when sixty-six percent or more of sample measurements exceed the same daily maximum limit or the same average limit over a six-month period. “City” or “Manteca” refers to the city of Manteca.
“Compliance order” means an administrative order directing the discharger to achieve or restore compliance by a specified date. A Compliance Order may include a compliance schedule with specific milestones for achieving steps toward compliance, for tracking progress, and for the discharger to report progress. “Control authority” means the POTW or the city of Manteca. “Director of public works” means director of public works for the city of Manteca or his or her agent. “Discharger” means any person discharging industrial waste to the water pollution control system. This term specifically includes any categorical users connected to the water pollution control system, whether or not they discharge process wastewater. It also includes any facilities with a reasonable potential for discharging significant quantities of industrial waste, whether or not they are currently discharging process waste. “Domestic waste” means any waterborne waste of the type normally resulting from flushing and washing waste products from residences and lavatories.
“Federal pretreatment regulations” means any regulations promulgated by EPA in accordance with Sections 307(B)and (C) and 402(B)(8) of the “Act” (33 U.S.C. 1317) for the implementation, administration, and enforcement of pretreatment standards.
“Illegal discharge” means any discharge of waste prohibited by state or federal law, or local limits including discharge to the wastewater treatment plant and collection system, or to the storm drain system. “Indirect discharge” means any discharge of waste which enters or flows into the Manteca water pollution control system through a connection of a member jurisdiction (e.g. city of Lathrop collection system) or through a septic contributor.
“Industrial user or users” means any source of direct or indirect discharge of commercial or industrial waste. “Industrial waste” means any waterborne waste, excluding domestic waste. Waterborne wastes from “commercial” activities, such as automobile repair or photo processing, are expressly included in this definition. “Industrial discharge permit” means a control mechanism issued to a significant industrial user, or any person discharging to the water pollution control system that the director of public works determines needs a permit, to regulate its discharge of toxic, organic, or hydraulic loading to the water pollution control system. “Interference” means any discharge which, alone or in conjunction with a discharge or discharges from other sources, 1) inhibits or disrupts the treatment processes or operations of the water pollution control system, or its sludge processes, use or disposal; and 2) therefore is a cause of a violation of any requirement of the Manteca NPDES permit, including an increase in the magnitude or duration of a violation, or of the prevention of sewage sludge use or disposal in compliance with the following statutory provisions and regulations or permits issued ATTACHMENT 2
thereunder (or more stringent California state or local regulations): Section 405 of the Clean Water Act, the Solid Waste Disposal Act (SWDA) (including Title II, more commonly referred to as the Resource Conservation and Recovery Act (RCRA), and including California state regulations in any California state sludge management plan prepared pursuant to Subtitle D of the SWDA), the Clean Air Act, the Toxic Substances Control Act, and the Marine Protection, Research, and Sanctuaries Act.
“Manteca Pretreatment Program.” The purpose of the Manteca Pretreatment Program (MPP) is to provide a means to control and regulate the discharge of industrial and hazardous waste to the Manteca water pollution control system and the wastewater treatment plant. The program applies to all discharges to the water pollution control system and the wastewater treatment plant. The components of the MPP include the development and use of the following:
Local Limits. Specific limits on the concentration of materials and chemical constituents allowed in the industrial waste discharge.
“Enforcement Response Plan” means guidelines for Manteca’s enforcement of federal, state, and local laws related to waste discharge to the POTW, either directly or indirectly, and to waters of the state and/or United States, and enforcement of the Manteca Waste Ordinance No. 13.20; Manteca Waste Ordinance No. 13.20, which describes the authorities of the city of Manteca to enforce E.P.A. and local requirements related to waste discharge to the Manteca water pollution control system.
“Manteca industrial discharge permit” means a permit stating the conditions, prohibitions, limits, and requirements for discharges to the Manteca water pollution control system that is issued to all significant industrial users and any other users that discharge to the water pollution control system a waste, of substantial volume or of a concentration, that the director of public works deems significant and therefore requires a permit. “Member jurisdiction” means any city or agency, such as the city of Lathrop, which owns and operates a collection system connected to the city of Manteca water pollution control system. The relation of a member jurisdiction is specified in a jurisdictional agreement. “National pretreatment standards” means any regulations containing pollutant discharge limits promulgated by EPA in accordance with Section 307(b) and (c) of the Act (33 U.S.C. 1317) and which apply to a specific category of industrial users. These regulations are found at 40 CFR Chapter I, Subchapter N, Parts 405-47. This term includes prohibitive discharge limits established pursuant to Section 403.5. “New source” means any building, structure, facility, or installation from which there is or may be a discharge of pollutants, the construction of which commences after the publication of proposed Pretreatment Standards under section 307(c) of the Act which will be applicable to such source if such standards are thereafter promulgated in accordance with that section, provided that:
a.
The building, structure, facility, or installation is constructed at a site which no other source is located; or
b.
The building, structure, facility, or installation totally replaces the process or production equipment that causes the discharge of pollutants at an existing source; or c.
The production or wastewater generating processes of the building, structure, facility, or installation is substantially independent of an existing source at the same site. In determining whether these are substantially independent, factors such as the extent to which the new facility is integrated with the existing plant, and the extent to which the new facility is engaged in the same general type of activity as the existing source, should be considered.
Construction on a site at which an existing source is located results in a modification rather than a new source if the construction does not create a new building, structure, facility, or installation meeting the criteria of paragraph (b) or (c) above but otherwise alters, replaces, or adds to existing process or production equipment.
Construction of a new source as defined under this paragraph has commenced if the owner or operator has:
a.
Begun, or caused to begin, as part of a continuous onsite construction program:
i.
Any placement, assembly, or installation of facilities or equipment; ii.
Significant site preparation work including clearing, excavation, or removal of existing buildings, structures, or facilities which is necessary for the placement, assembly, or installation of new source facilities or equipment; or
ATTACHMENT 2
b.
Entered into a binding contractual obligation for the purchase of facilities or equipment which are intended to be used in its operation within a reasonable time. Options to purchase or contracts which can be terminated or modified without substantial loss, and contracts for feasibility, engineering, and design studies do not constitute a contractual obligation under this paragraph. “Noncompliance” means any violation of any part of this chapter, the industrial discharge permit, or national categorical standards.
“Notice of violation (NOV)” means an official communication from the city to the non-compliant industrial user informing the industrial user that a violation has occurred. “Nuisance” means any nuisance defined by California statutes or known at common law or in equity jurisprudence. “Pass-through” means a discharge which exits the Manteca’s treatment works into the waters of the state or into Manteca’s land disposal system in quantities or concentrations, which alone or in conjunction with a discharge or discharges from other sources, is a cause of a violation of any requirement of Manteca’s NPDES permit or of Manteca’s RWQCB permit, including an increase in the magnitude or duration of a violation. “Permittee” means the person to whom an industrial discharge permit has been issued pursuant hereto. “Person” means any individual, firm, partnership, corporation, association or public agency, including the state of California and the United States of America. The singular shall include the plural. “Pretreatment” means any operations performed on sewage prior to discharge into the water pollution control system.
“Pretreatment requirement” means any substantive or procedural requirement related to pretreatment, other than a national pretreatment standard, applicable to an industrial user. “Premise” means the location of the process, storage, discharge, and business actions of any person discharging to the water pollution control system.
“Self-monitoring” means wastewater sampling performed by a discharger, in accordance with Manteca’s Pretreatment Program. Self-monitoring requirements will be specified in the user’s industrial discharge permit. “Service area” means the geographical area served by the Manteca water pollution control system. “Sewage” means any combination of domestic waste and industrial waste together with such ground, surface and storm waters as may be present.
“Show cause order” means an order for the industrial user to appear before the Manteca director of public works, to explain the noncompliance and why more severe enforcement actions should not be taken. Manteca may designate a hearing officer to hear testimony for the hearing. “Significant industrial user (SIU)” includes all of the following in accordance with 40 CFR 403.3 (t). All categorical industrial users and any non-categorical industrial user which discharges an average of twenty-five thousand gallons per day or more of process wastewater, excluding sanitary, noncontact cooling, and boiler blowdown wastewater; contributes a process wastewater which makes up five percent or more of the average dry weather hydraulic or organic (BOD, TSS, TDS, ammonia, and/or phosphorus) capacity of the POTW; or has a reasonable potential, in the opinion of the director of public works or his or her agent, to adversely affect the POTW’s operation or to violate a pretreatment standard or requirement. “Significant noncompliance” includes any of the following: chronic violations, technical review criteria (TRC) violations, or any other violation or violations of an effluent limit that Manteca believes has caused, alone or in combination with other discharges, interference or pass through, or has endangered the health of the sewage treatment plant personnel or the public, or any pollutant violation that has caused imminent endangerment to human health or welfare, or to the environment and has resulted in the city’s exercise of its emergency authority to halt or prevent such a discharge.
“Slug discharge” means a slug discharge is any discharge of a non-routine, episodic nature, including but not limited to a bypass of the pretreatment system, or a non-customary batch discharge. A slug discharge also includes any intentional discharge to the water pollution control system in such quantity or concentration that has the potential to cause upset to the water pollution control system. “Technical review criteria (TRC) violation” means a violation of significant noncompliance when thirty-three percent or more of all of the measurements for each pollutant, taken during a six month period, equal or exceed ATTACHMENT 2
the product of the daily maximum limit or the average limit multiplied by the applicable TRC. Group I: For conventional pollutants, the TRC is 1.4. For all other pollutants, the TRC is 1.2. “Waste ordinance” refers to this chapter and any amendments thereto. “Water pollution control system” means all facilities of the city of Manteca and/or all facilities of any member jurisdiction for collecting, pumping, treating and disposing of sewage. “Working day” means Monday, Tuesday, Wednesday, Thursday, or Friday, excluding federal or California state holidays.
B. List of Abbreviations.
BOD Biochemical Oxygen Demand
CCR California Code of Regulations
CFR Code of Federal Regulations
City City of Manteca
CWA Clean Water Act
DPW Director of Public Works of the City of Manteca
ADPW Assistant Director of Public Works of the City of Manteca EPA Environmental Protection Agency of the United States IU Industrial User
Manteca City of Manteca
mg/L Milligrams per liter concentration
µg/L Microgram per liter concentration
NOV Notice of Violation
NPDES National Pollutant Discharge Elimination System
pH A numerical value representing the relative acidity or alkalinity of the waste discharge POTW Public Owned Treatment Works
RWQCB Regional Water Quality Control Board, Central Valley Region SIU Significant Industrial User
TSS Total Suspended Solids
TDS Total Dissolved Solids
(Ord. 1275 § 2 (part), 2004)
13.20.030 Authority and responsibility.
A. Authorities of the City of Manteca Public Works Department.
1. Manteca and its agent shall have the authority to inspect the premises of any person discharging waste to the Manteca water pollution control system, including but not limited to, any areas or points of sampling, discharge, process, storage, record keeping and/or any other areas as deemed reasonable and necessary by the Director of Public Works to document the person’s compliance with the requirements of this chapter or the industrial discharge permit.
2. Manteca and its agent, shall have the authority to witness any sampling and sampling procedures as required of the user as part of the self-monitoring program and under the terms of this chapter and the industrial discharge permit.
3. Manteca and its agent shall have the authority to terminate service and disconnect any person from the water pollution control system who does not comply with the requirements of this chapter or the industrial discharge permit.
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4. Manteca and its agent shall have the authority to obtain copies of any monitoring and sampling records as necessary to establish compliance or non-compliance with the objectives of this chapter or the industrial discharge permit, and if necessary, remove those records from the premises for copying purposes. These records include, but are not limited to, record keeping required under 40 CFR 403.12 of the Act.
5. Manteca and its agent shall have the authority to require an industrial waste discharger to install and operate pretreatment facilities as deemed reasonable and necessary by the assistant director of public works to meet the EPA categorical pretreatment standards and the local limits described in this chapter.
6. Manteca and its agent shall have the authority to specify a compliance schedule for the user to install pretreatment, monitoring, and sampling equipment, and shall have the authority to require compliance reports on meeting scheduled milestones.
7. Manteca and its agent shall have the authority to inspect the installation and operation of the pretreatment facilities.
8. Manteca and its agent shall have the authority to issue an administrative order, including a show cause order, cease and desist order, and compliance order to any person discharging to the water pollution control system.
9. Manteca and its agent shall have the authority to seek injunctive relief and pursue civil and criminal penalties for violations of this chapter as may be provided for under the act and state and federal laws.
10. Manteca and its agent shall have the authority to levy fees for additional services or to recover damage costs, which are a result of a discharge, as described in Section 13.020.050(C) of this chapter.
11. Manteca and its agent shall have the authority to halt or suspend a discharge in the event of an actual or threatened discharge which is in violation of this chapter, the industrial discharge permit, or the regulatory conditions of 40 CFR 403.8(F)(1)(f)(B), or in the event of an emergency, or a condition in which the safety of humans or the environment is threatened.
B. Authorities of the Director and/or Assistant Director of Public Works.
1. The assistant director of public works of the city of Manteca or his or her agent shall have the authority to inspect the premises of the industrial waste discharger, including but not limited to the process facilities, discharge points, sampling points, and storage facilities, and/or any other facilities as deemed reasonable and necessary by the assistant director of public works, to ensure that the user is in compliance with all provisions of the user’s industrial discharge permit and of this chapter. The authority to inspect includes the authority to collect samples of any wastes either being discharged to the water pollution control system or having the potential to be discharged.
2. The assistant director of public works of the city of Manteca or his or her agent shall have the authority to require submission of all notices and self-monitoring reports from any industrial user as required by this chapter and the user’s permit, and any additional reports required to demonstrate compliance with this chapter and the permit requirements, including, but not limited to, the reports required in Section 403.12, and signatory and record keeping requirements of 40 CFR 403.12(1).
3. The assistant director of public works of the city of Manteca or his or her agent shall have the authority to require industrial users to develop a compliance schedule to meet all applicable national pretreatment standards, California state regulations, Manteca local limits, and all provisions of the industrial discharge permit, and of this chapter. The assistant director of public works also shall have the authority to require any person in noncompliance to submit progress reports for meeting the goals provided under the compliance schedule.
4. The assistant director of public works of the city of Manteca or his or her agent shall have the authority to enter the premises of any person discharging industrial waste into the Manteca system, at any time, as deemed reasonable by the assistant director of public works.
5. The assistant director of public works of the city of Manteca or his or her agent shall have the authority to witness sampling and sampling procedures of any person discharging industrial waste into the Manteca water pollution control system.
C.
Responsibilities of the Director of Public Works.
1. The director of public works shall be charged with the administration of the water pollution control system and the enforcement of the provisions of this chapter. For such purposes, upon presentation of proper credentials and identification, he or she or his or her agent may enter at reasonable times any premise in the service area to perform any duty imposed upon him or her by this chapter.
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2. The director of public works shall be responsible for checking the quantitative or qualitative compliance with the established regulations. Such quantitative or qualitative analysis may be made either by spot checks or regularly scheduled checks of all waste material.
3. If the waste material is found to be in violation of the standards established in Section 13.020.040 of this chapter, it will be the responsibility of the director of public works or his or her agent to request compliance and compliance reports from the user on the progress of corrective measures.
4. The director of public works or his or her agent shall have the authority to invoke emergency powers as described in Section 13.020.090(C) of this chapter.
(Ord. 1275 § 2 (part), 2004)
13.20.040 Standards and limitations.
A. The city of Manteca has set forth the following prohibitions and limitations for waste discharge to the Manteca water pollution control system. Where national categorical standards are applicable, the discharger must comply with the more stringent requirement of the Manteca local limit or the applicable categorical standard for the given pollutant.
B. General Discharge Prohibitions. These general prohibitions and specific prohibitions that follow apply to each user introducing pollutants into the POTW whether or not the user is subject to other national pretreatment standards or any national, state or local pretreatment requirements.
C. No person shall contribute to or cause to be contributed to the water pollution control system any waste or any pollutant that will:
1. Interfere with, inhibit, or disrupt the operation, processes, or performance of the water pollution control system (including the collection, treatment, disposal systems, and sludge processes) or adversely affect the effluent and sludge quality, in violation of Manteca’s NPDES permit or any other state or federal permit; or which cause Manteca to be in noncompliance with statutory authorities cited in 40 CFR 403.3(a)(2).
2. Damage the water pollution control system.
3. Cause pass through of the water pollution control system.
4. Obstruct Manteca’s wastewater treatment or collection facilities.
5. Cause hazard to the public safety, the environment, or to Manteca personnel.
6. Singly, or in combination with waste present in the water pollution control system, exit the Manteca water pollution control system into waters of the United States and cause Manteca to violate any requirement of its NPDES permit or any other state, federal, or local permits or laws, including magnitude of the violation.
D.
Other Prohibitions. No person shall discharge any pollutant(s), waste, industrial or domestic, to the water pollution control system, except through sewer connections approved by Manteca and the relevant member jurisdiction or at approved discharge locations at the Manteca treatments works. Discharge at any other location, including collection system manholes, is prohibited without prior written approval from the director of public works.
1. Storm Drainage and Groundwater Prohibition. Storm water, groundwater, street drainage, subsurface drainage, or yard drainage shall not be discharged, either directly or indirectly, to the water pollution control system. If such discharge is necessary, the city of Manteca director of public works may approve an application for temporary discharge of such substances in the event no alternate method of disposal is reasonably available.
Application for discharge of storm water, groundwater, street drainage, subsurface drainage, or yard drainage shall be made to the director of public works in writing and must be approved by the director of public works prior to discharge to the water pollution control system. Such discharges shall be subject to all applicable requirements of this chapter and any applicable fees of the city of Manteca.
2. Unpolluted Water Prohibition. Unpolluted water, such as single-pass cooling water, boiler blow-down water, and swimming pool water, shall not be discharged, either directly or indirectly, to the water pollution control system. If such discharge is necessary, the city of Manteca director of public works may approve an application for temporary discharge of such substances in the event no alternate method of disposal is reasonably available.
Application for discharge of unpolluted water shall be made to the director of public works in writing and must be approved by the director of public works prior to discharge to the water pollution control system. Such discharges ATTACHMENT 2
shall be subject to all applicable requirements of this chapter and any applicable fees of the city of Manteca.
3. Additional Prohibitions. Except as hereinafter provided, no person shall discharge, or cause to be discharged, to the water pollution control system any of the following described waters, pollutants or wastes:
a. Any solid or viscous pollutants in amounts which will cause obstruction to the flow in the collection system or the treatment works, or which will require unusual attention or expense to convey and/or treat. b. Any discharge which creates a fire or explosion hazard in the collection system or the treatment works, including but not limited to, waste streams with a closed cup flashpoint of less than 140 degrees Fahrenheit (60 degrees Celsius) using test methods specified in 40 CFR 261.21. c.
Any heated discharges which cause the influent into the treatment works to exceed 104 degrees Fahrenheit, and any heated discharges which create a hazard to the water pollution control system personnel or inhibit biological activity in the treatment plant.
d. Any discharge which has been diluted as a partial or complete substitute for treatment to achieve compliance with this chapter, the user’s industrial discharge permit, or the national categorical standards. e.
Any discharge of hazardous waste, as defined by Title 22 of the California Code of Regulations without the written approval of the director of public works.
f. Any discharge which causes noxious or malodorous gases at or near the Manteca water pollution control system facilities or the facilities of any member jurisdiction of the city of Manteca, or which otherwise creates a public nuisance.
g. Any discharge which results in the formation of toxic gases, fumes, or vapors in a quantity that endangers the health or safety of Manteca personnel or the public. h.
Any discharge of pesticides, herbicides, or polychlorinated biphenyls (PCBs) in quantities deemed significant by the director of public works.
i. Any radioactive wastes, except as allowed under the “California Radiation Control Regulations”, CCR Title 23 sec 30100 et seq.
j.
Any discharge of any pollutant, including oxygen demanding pollutants (BOD, etc.), released at a flow rate and/or concentration which either singly or by interaction with other pollutants will cause interference with the water pollution control system.
k. Any discharge waters having an average daily flow greater than 0.5 percent of Manteca’s average dry weather flow (ADWF), without the approval of the director of public works. l.
Any discharge containing petroleum oil, non-biodegradable cutting oil, or products of mineral oil origin in amounts that, alone or in conjunction with other discharges, will cause interference or pass through. m. Pollutants that will cause corrosive structural damage to the POTW, but in no case discharges with a pH lower than 6.0, unless the works is specifically designed to accommodate such discharges. n.
Any trucked or hauled pollutants, except at discharge points designated by the POTW. o. Any solid material not capable of passing through a 3/8 inch mesh screen.
E.
Limits. Any exceedance or violation of these limits is considered to be a violation of this chapter and is enforceable by penalties.
1. Any discharge with a pH less than 6.0 or greater than or equal to 12.5.
2. Any discharge having a closed cup flashpoint of less than 140 degrees Fahrenheit (60 degrees Celsius) using test methods specified in 40 CFR 261.21.
3. The following table lists the maximum waste discharge concentration for the listed pollutants. The director of public works may impose mass limits in addition to, or in place of the maximum concentration limits.
Pollutant Maximum Concentration (mg/L)
Antimony 0.6
Arsenic 0.6
Barium 12.0
ATTACHMENT 2
Beryllium 6.0
Boron 12.0
Cadmium 0.12
Chromium (Total) 0.6
Copper 2.4
Lead 0.6
Manganese 0.6
Mercury 0.005
Molybdenum 0.06
Nickel 4.1
Selenium 0.12
Silver 0.6
Tin 24.0
Vanadium 1.2
Zinc 1.0
Cyanide (Total) 1.2
Iron None
F.
National Categorical Standards. The national categorical standards found at 40 CFR Chapter I, Subchapter N, Parts 405-471, are hereby incorporated into this chapter and made a part thereof. All categorical users are required to comply with those national categorical standards, which are applicable to them.
G.
Point of Application of Limits. Compliance with the discharge limits and standards listed in this section shall be determined at a location or locations deemed appropriate by the director of public works. Where the national categorical standards are applicable, the point of application shall be appropriate for these standards. (Ord. 1275 § 2 (part), 2004)
13.20.050 Administration.
A. Classification of Users. All users shall be classified for wastewater disposal purposes in accordance with the activities conducted upon the premises, as determined by the director of public works. The purpose of classification is to facilitate the regulation of wastewater dischargers and the recovery of equitable and appropriate fees. The classification of a user will be used to determine the Discharge Fee and Connection Fee, as described in the Manteca fee schedule.
B.
Notification of Industrial Discharge. Any person contributing industrial waste to the Manteca water pollution control system is required to notify the Manteca Department of Public Works of their discharge. Any new business is required to notify the department of their intent to discharge industrial waste ninety days prior to commencing the discharge. These notification requirements are effective upon the adoption date of this chapter.
Discharge of industrial waste from any of the following sources is subject to the approval of the director of public works: new connections, added burden from increased or changed discharge by existing sources, contaminated groundwater disposal, septage disposal, and limited and temporary disposal of trucked or hauled waste.
1. Discharge Limitations. All industrial waste dischargers, users of the Manteca Water Pollution Control System, and permittees shall comply with all provisions of this chapter, the industrial discharge permit, any applicable waste ordinance or permit of a member jurisdiction; and any other applicable federal, state or local laws, regulations, or permits for all discharges to the water pollution control system.
2. Industrial Discharge Permit Requirements. Industrial discharge to the Manteca water pollution control system may be permitted by the assistant director of public works. Upon notification of an occurring or potential industrial waste discharge, the assistant director of public works or his or her agent will evaluate the waste flow, concentration, and make-up to determine if the user requires an industrial discharge permit. If a permit is required, ATTACHMENT 2
the user will be required to complete an application for an industrial discharge permit, to be submitted to the Manteca department of public works within ninety days of the date of the notice to apply. The submittal of an application form, application fee, or renewal form does not guarantee the granting of a permit, and the application for permit may be denied.
Industrial discharges which may require an industrial discharge permit, and the permit requirements, procedures, and industrial user classification are described in the Manteca Pretreatment Program and the Manteca Pretreatment Program requirements are hereby incorporated as part of this chapter.
3. Permit Limitations.
a.
All industrial discharge permits shall be expressly subject to all provisions of this chapter and all rates and charges established by Manteca. All permits shall be issued for a specified time period, not to exceed five years. The assistant director of public works may establish renewal dates from one to sixty months. b. No vested rights of any type whatsoever of discharge to or sewerage capacity in the sanitary sewer system is created by the issuance of an industrial discharge permit. c.
Each permit is subject to renewal upon request to Manteca. Applications for permit renewal shall be submitted to Manteca by the deadline stated in the user’s waste discharge permit. Permit renewal is not guaranteed and shall be subject to capacity limitations, treatment requirements, and compliance history considerations.
d.
The permitted discharge is accepted only on a capacity available basis. Such discharge is subject to reduction, modification, suspension, or termination at any time by Manteca with a phone call or written notice. Discharge shall cease immediately upon request by Manteca and shall not be continued without written permission from Manteca.
e.
Any permit issued pursuant to this chapter may be revoked or suspended at any time by the director of public works for fraud, misrepresentation, or false statement contained in an application for permit, or for violation of any condition of permit, or of any provisions of this chapter. f. Any permit issued pursuant to this chapter may be modified, at any time, by the assistant director of public works, including the term and conditions for industrial discharge, discharge quantity, and/or concentration limits authorized therein.
4. Permit Transfer. The industrial discharge permit is issued only to a specific person and for a specific location, as designated in the permit, and shall not be assignable nor transferable to any other person or any other location.
Sale or relocation of a business, public agency, or person shall obligate the business, public agency, or person to obtain written approval from the assistant director of public works prior to continuing the discharge under the terms and conditions of the original permit, and to make application to obtain new industrial discharge permit ninety days before commencing the continued discharge. Permit transfer as a result of corporate or personnel reorganization, insolvency or bankruptcy shall be subject to the approval of the assistant director of public works and must be requested in writing by the user.
C.
Authority to Assess and Collect Fees. All discharges to the Manteca water pollution control system shall be subject to the terms and conditions of this chapter and to the terms, conditions, fees, and fines as described below and as contained in the Manteca Fee Schedule and as set forth in Section 13.020.090 of this chapter.
Manteca shall have the authority to assess and collect fees, for cost recovery purposes. The fees are cumulative and may include, but are not limited to, the following:
1. Permit Fee. A permit fee is due when the permit application is submitted to Manteca. The purpose of this fee is to recover costs incurred by Manteca for application review, permit issuance, and administration of the permit.
The permit fee shall be as below, based on the classification of the discharger by the director of public works or his or her agent. The classification will be based primarily on the amount of Manteca resources expected to be required for permit issuance and administration. Where a permit is denied, after payment of the permit fee, a portion of the fee may be refunded to the discharger, at the discretion of the director of public works.
2. Inspection Fee. The purpose of this fee is to recover Manteca costs for review and/or inspection of a user’s pretreatment system design, drawings, construction and/or operations, chemical or hazardous materials storage and/or sampling facilities, and procedures used by the user, as applicable and as deemed necessary and reasonable by the assistant director of public works, to demonstrate compliance with this chapter or any directive of the ATTACHMENT 2
director of public works or Manteca. This fee is due when the service is rendered.
3. Sampling Fee. The purpose of this fee is to recover Manteca costs for sampling, lab fees, travel, equipment, labor or any other costs accrued by Manteca to complete sampling as required by this chapter, the industrial discharge permit, or under directive of the director of public works to demonstrate compliance. This fee is due when the service is rendered.
4. Noncompliance Fees. These are fees resulting from violations of this chapter or the industrial discharge permit. There is no upper limit for noncompliance fees which may include any or all of the following, dependent upon the severity of the violation or violations.
a. Inspection Fee. The purpose of this fee is to reimburse Manteca for any inspection costs as necessary and reasonable to demonstrate compliance with this industrial ordinance and/or the industrial discharge permit, following a violation.
b.
Additional Sampling Fee. The purpose of this fee is to recover Manteca costs for sampling, lab fees, travel, equipment, labor and any other costs incurred by Manteca, to complete sampling and to demonstrate compliance with this chapter and/or the industrial discharge permit. c. Damage Fee. The purpose of this fee is to recover costs incurred by Manteca for the protection from or repair of damage to the water pollution control system because of a harmful or hazardous discharge in violation of this chapter by any person.
d.
Manteca Permit Violation Fee. The purpose of this fee is to recover costs assessed to Manteca as a result of a user discharge violation causing pass through or interference, such that Manteca is unable to meet the requirement of its NPDES Permit or any other permit requirements, including an increase in the magnitude or duration of a violation. The fee shall include the amount of any fine(s) levied against Manteca by the EPA or any other regulatory agency issuing a fine, because of a violation of Manteca’s permit. The permit violation fee shall also include reimbursement of costs for sampling, travel, labor, and any other expenses incurred by Manteca as a result of the person’s discharge causing Manteca to be in violation of its permit.
The fees listed and described in this section shall be payable to Manteca only and do not include any additional fees which may be levied by any member jurisdiction providing collection services.
D.
Delinquent Fees. All fees as described above, are due and payable within five days of the posted mailing date of the notice. All fees not paid within thirty days of issuance will be considered delinquent and are subject to a subsequent delinquent charge amounting to ten percent of the amount of the fee in question. Failure to pay fees within ninety days of issuance shall result in enforcement action by Manteca. This enforcement action may include termination of service and/or civil action to collect all outstanding fees, and delinquent charges. All costs resulting from this enforcement action will be paid by the user. (Ord. 1275 § 2 (part), 2004)
13.20.060 Reporting requirements.
A. What to Report. Under the terms and conditions of this chapter and the industrial discharge permit, all persons discharging to the Manteca water pollution control system shall report to Manteca any and all of the following events:
1. Noncompliance. Any person required to perform self-monitoring shall report any violation to the assistant director of public works or his or her agent, within twenty-four hours of becoming aware of the violation.
Notification to Manteca may be by telephone, in person, or in writing. All verbal notifications shall be followed by a written report of the violation. This reporting will coincide with, or be in addition to, any self-monitoring reports required by the industrial discharge permit. Where the discharge in violation has a reasonable potential to affect the water pollution control system, notification to Manteca will be made immediately. The authority to require such reporting is provided in the federal Clean Water Act.
Under the requirements of 40 CFR, 403.12(G), if sampling by the discharger indicates a violation of this chapter or the industrial discharge permit requirements, the discharger shall notify Manteca of the violation within twentyfour hours of becoming aware of the violation and shall repeat the sampling and analysis and submit the results of the repeat analysis to Manteca within thirty days after becoming aware of the violation.
2. Change in Process. All persons discharging industrial waste to the water pollution control system shall report in writing in their industrial, manufacturing, or operating processes that could effect the quality or quantity of their ATTACHMENT 2
discharge, prior to commencing the changed discharge. Notification will be to the assistant director of public works or his or her agent. Where the anticipated changes in discharge volume or content have a reasonable potential to affect the water pollution control system, notification shall be at least ninety days prior to commencing the changed discharge.
3. Storage of Materials and Waste. Within the Manteca service area, all persons storing or using materials or waste in such quantities that a spill or leakage could adversely affect the water pollution control system, shall report in writing such storage to the assistant director of public works or his or her agent. The director of public works may, as deemed necessary, require a written report including, but not limited to, any or all of the following elements. The deadline for submission of the report shall be as deemed necessary and reasonable by the director of public works.
a. Description of stored materials and waste, including description of storage and disposal practices; b.
Description of discharge practices, including non-routine “batch” discharges; c. Procedures for immediately notifying Manteca of spills or other atypical discharges to the water pollution control system;
d.
Procedures for preventing and/or mitigating spills or other atypical discharges to the water pollution control system. Procedures addressing spills to the storm drain or surface waters may also be required.
4. Slug Discharge. Any person who must make a slug discharge shall notify the assistant director of public works or his or her agent of the discharge immediately. This notification shall be by phone call or in person. The assistant director of public works may require a subsequent written report of the event.
At least once every two years, the assistant director of public works shall evaluate whether each significant industrial user needs an accidental discharge/slug control plan. The assistant director of public works may require any user to develop, submit for approval, and implement such a plan. Alternatively, the assistant director of public works may develop such a plan for any user. An accidental discharge/slug control plan shall address, at a minimum, the following:
a.
Description of discharge practices, including non-routine batch discharges; b.
Description of chemicals stored;
c.
Procedures for immediately notifying the assistant director of public works and the POTW and any accidental or slug discharge.
d. Procedures to prevent adverse impact from any accidental or slug discharge. Such procedures include, but are not limited to, inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operation, control of plant site runoff, worker training, building of containment structures or equipment, measures for containing toxic organic pollutants, including solvent, and/ or measures and equipment for emergency response.
5. Discharge of Hazardous Waste. All industrial users shall notify Manteca, the EPA, and the California Waste Management Board, in writing, of any discharge into the water pollution control system of any substance which, if otherwise disposed, would constitute a hazardous waste under 40 CFR 261. The information required in the notification, the time frames for reporting, and conditions under which notification does not have to be made are all as specified in 40 CFR 403.12(p). The director of public works shall make determination if routine, permitted discharges of hazardous waste of no more than fifteen kilograms per one calendar month (less than one pound per day) to the water pollution control system must be reported to the POTW. This determination shall be made on a case by case and user basis.
6. Baseline Monitoring Reports. All categorical industrial users must submit baseline monitoring reports, compliance schedule progress reports, ninety-day compliance reports, periodic reports on continued compliance, and notices of slug loading per 40 CFR 403.12 at a frequency deemed reasonable by the director of public works.
B.
Types of Reports. The assistant director of public works or his or her agent may require any person discharging industrial waste to submit any or all of the following reports in addition to any reports required under Section
13.020.060(A) of this chapter.
1. Baseline monitoring reports;
2. Compliance reports;
ATTACHMENT 2
3. Compliance schedule progress reports;
4. Any other reports as reasonable and necessary to demonstrate compliance with this chapter or the waste discharge permit.
All submitted baseline monitoring reports, compliance reports, and compliance schedule progress reports shall be signed by the industrial user or his or her authorized agent in accordance with 40 CFR 403.12(1). This person shall be the same person who signs the application for an Industrial Discharge Permit, unless an agent is designated at the time the industrial discharge permit is issued. These reports shall contain the certification statement specified in 40 CFR 403.6(A)(2)(b).
The reports which may be required by the assistant director of public works are discussed below.
1. Baseline Monitoring Report. Within either one hundred eighty days after the effective date of a categorical pretreatment standard or the final administrative decision on a category determination under 40 CFR 403.6(A)(4), whichever is later, existing categorical users currently discharging to or scheduled to discharge to the POTW shall submit to the assistant director of public works a report which contains the information listed in paragraph 2 below. New sources and sources that become categorical users subsequent to the promulgation of an applicable categorical standard shall submit, ninety days before commencement of discharge, a report that contains the information listed in paragraph 2. This report shall be in writing and be submitted to the assistant director of public works. Baseline monitoring reports for categorical users shall include all the information set forth in 40 CFR 403.12(B)(1) through (7). Baseline monitoring report information users required to submit a baseline monitoring report shall include the following information in the baseline monitoring report. a.
Identifying Information. The name and address of the facility, including the name of the operator and owner.
b.
Environmental Permits. A list of any environmental control permits held by or for the facility. c. Description of Operations. A brief description of the nature, average rate of production, and standard industrial classifications of the operation(s) carried out by such user. This description should include a schematic process diagram that indicates points of discharge to the POTW from the regulated process. d.
Flow Measurement. Information showing the measured average daily and maximum daily flow, in gallons per day, to the POTW from regulated process streams and other streams, as necessary, to allow use of the combined waste stream formula set in 40 CFR 403.6(E). e.
Measurement of Pollutants. The categorical pretreatment standards applicable to each regulated process.
The results of sampling and analysis identifying the nature and concentration, and/or mass, required by the standard or by the city, of regulated pollutants in the discharge from each regulated process. Instantaneous, daily maximum, and long-term average concentrations, or mass, where required, shall be reported. The sample shall be representative of daily operation and shall be analyzed in accordance with procedures set out in Section 13.020.070 of this chapter. Sampling must be performed in accordance with procedures set out in Section 13.020.070 of this chapter.
f.
Certification. A statement, reviewed by the user’s authorized representative and certified by a qualified professional, indicating whether pretreatment standards are being met on a consistent basis, and if not, whether additional operation and maintenance and/or additional pretreatment is required to meet the pretreatment standards and requirements.
g.
Compliance Schedule. If additional pretreatment and/or operation and maintenance will be required to meet the pretreatment standards, the shortest schedule by which the user will provide such additional pretreatment and/or operation and maintenance. The completion date in this schedule shall not be later than the compliance date established for the applicable pretreatment standard. A compliance schedule pursuant to this section must meet the requirements set out in Section 13.020.060(B)(2) of this chapter. h.
Signature and Certification. All baseline monitoring reports must be signed and certified in accordance with Section 13.020.060(B) of this chapter.
2. Compliance Reports. Any person discharging industrial waste to the water pollution control system may be required to submit a report demonstrating compliance with this chapter and any applicable industrial discharge permit to the assistant director of public works. This report shall be submitted, at a minimum, semi-annually and as specified in the person’s industrial discharge permit.
ATTACHMENT 2
In cases of known or suspected noncompliance, the assistant director of public works may require additional and more frequent compliance reporting.
All categorical users shall submit a report demonstrating compliance with the applicable national categorical standards within ninety days following the date for final compliance with those standards. a. All significant industrial users shall, at a frequency determined by the assistant director of public works, but in no case less than twice per year (in June and December), submit a report indicating the nature and concentration of pollutants in the discharge, and the measured or estimated average and maximum daily flow for the reporting period. Categorical industry compliance reports shall include pollutants regulated by the applicable pretreatment standard. Non-categorical significant industry compliance reports shall include the pollutants identified in the user’s industrial discharge permit. All periodic compliance reports must be signed and certified in accordance with Section 13.020.060(B) of this chapter. b. All wastewater samples must be representative of the user’s discharge. Wastewater monitoring and flow measurement facilities shall be properly operated, kept clean, and maintained in good working order at all times. The failure of user to keep its monitoring facility in good working order shall not be grounds for the user to claim that sample results are unrepresentative of its discharge. c. If a user subject to the reporting requirement in this section monitors any pollutant more frequently than required by the assistant director of public works, using the procedures prescribed in Section 13.020.070 of this chapter, the results of this monitoring shall be included in the report.
3. Compliance Schedule Progress Reports. All persons found to be in violation of this chapter, the industrial discharge permit, or any state or federal regulation prohibiting or limiting waste discharge, may be required to prepare a schedule of actions to bring the discharge into compliance under the direction of the assistant director of public works.
The director of public works shall have the final authority to determine if an action is acceptable and appropriate; to set the time frame to complete compliance action; to set the frequency of required compliance reporting; to set the frequency for required sampling; to set monitoring and inspection requirements; and to determine any additional actions necessary for the user to meet the compliance schedule on a timely basis.
Any user subject to a compliance schedule shall submit to Manteca, for each compliance step in the schedule, a report stating whether or not compliance was achieved. Where a compliance schedule milestone is not met, the report must state the reasons for noncompliance, the steps being taken to comply with the compliance schedule, and the date when the compliance will be met. Each report must be submitted not later than fourteen days after the date of the compliance step, specified in the compliance schedule.
The following conditions shall apply to the compliance schedule required by Section 13.020.060(B)(2)(g) of this chapter.
a.
The schedule shall contain progress increments in the form of dates for the commencement and completion of major events leading to the construction and operation of additional pretreatment required for the user to meet the applicable pretreatment standards (such events include, but are not limited to, hiring an engineer, completing preliminary and final plans, executing contracts for major components, commencing and completing construction, and beginning and conducting routine operations); b. No increment referred to above shall exceed nine months; c.
The user shall submit a progress report to the assistant director of public works no later than fourteen days following each date in the schedule and the final date of compliance, including, as a minimum, whether or not the increment of progress is complied with, the reason for any delay and, if appropriate, the steps being taken by the user to return to the established schedule; and d. In no event shall more than nine months elapse between such progress report to the assistant director of public works.
4. Categorical Pretreatment Standard Deadline Compliance Report. Within ninety days following the date for final compliance with applicable categorical pretreatment standards, or in the case of a new source following commencement of the introduction of wastewater into the POTW, any user subject to such pretreatment standards and requirements shall submit to the assistant director of public works a report containing the information described in Section 13.020.060(B)(2) of this chapter. For users subject to equivalent mass or concentration limits ATTACHMENT 2
established in accordance with the procedures in 40 CFR 403.6(C), this report shall contain a reasonable measure of the users long-term production rate. For all other users subject to categorical pretreatment standards expressed in terms of allowable pollutant discharge per unit of production (or another measure of operation), this report shall included the user’s actual production during the appropriate sampling period. All compliance reports must be signed and certified in accordance with Section 13.020.060(B) of this chapter.
5. Changed Condition Reports. Each user must notify the assistant director of public works of any planned significant changes to the user’s operations or system which might alter the nature, quality, or volume of its wastewater at least ninety days before the change. Any user increasing the volume of wastewater above its sewer allocation must apply for and receive an additional sewer allocation through the Community Development Department.
a. The assistant director of public works may require the user to submit such information as may be deemed necessary to evaluate the changed conditions, including the submission of wastewater discharge permit application under Section 13.020.050 of this chapter. b. The assistant director of public works may issue a wastewater discharge permit under Section
13.020.050 of this chapter or modify an existing wastewater discharge permit under Section 13.020.050 of this chapter in response to changed conditions or anticipated changed conditions. c. For the purpose of this requirement, significant changes include, but are not limited to flow increases of twenty percent or greater, flow increases greater than the user’s sewer allocation, and the discharge of any previously unreported pollutants.
6. Other Reports. All industrial users shall submit to the assistant director of public works any other reports as deemed reasonable and necessary by the assistant director of public works, in addition to those described above, to demonstrate compliance with this chapter, the industrial discharge permit, or any applicable state and federal regulations. Such reports include, but are not limited to, any reports or plans required by federal, California state, or local laws or regulations.
C.
Record Keeping Requirement. All persons subject to the reporting requirements of this chapter and 40 CFR 403.12 shall maintain records of all information resulting from any monitoring activities and results, and make such records available for inspection and copying by EPA officials and Manteca personnel or agents, for a minimum of three years or a period of litigation, whichever is longer. (Ord. 1275 § 2 (part), 2004)
13.20.070 Inspection and monitoring.
A. Inspection Procedure. Manteca shall inspect the premises of any user to establish compliance with the provisions of this chapter, the user’s industrial discharge permit, and any applicable California state, federal, and local laws pertaining to the treatment and discharge of waste to the water pollution control system.
1. Inspections shall be made under the provisions of this chapter and/or the user’s industrial waste permit. If the user refuses reasonable access to the premises for purposes of inspection and monitoring, Manteca shall notify the user that he or she is in violation of this chapter, and the assistant director of public works may issue an administrative order, mandating such access by a specified date and at all reasonable times subsequent to that date.
2. An administrative warrant may be obtained in instances where the assistant director of public works or his or her agent believes there is substantial evidence that user refusal to consent to inspection and/or monitoring is concealing criminal acts, or willful or negligent discharges in violation of this chapter or any other applicable laws or regulations.
3. Where deemed necessary to protect the water pollution control system, the environment or the public health, safety or welfare from the effects of present or imminent discharges, the director of public works or his or her agent may invoke emergency measures as described in Section 13.020.90(C) of this chapter. These measures include providing access to a premise for the director of public works or his or her agents, without the consent of the owner or user.
4. Manteca retains the right to enter the premises to inspect the premises, processes, and records of the user; to sample or monitor the discharge, and to copy all records relating to pretreatment, chemical and waste storage, and waste discharge to the Manteca water pollution control system, pursuant to 40 CFR 403.8(F)(1)(e), to verify that the waste discharge is in compliance with industrial discharge permit, with this chapter, and all applicable state, ATTACHMENT 2
federal, and local laws pertaining to pretreatment and waste disposal to POTWs or waters of the United States.
Manteca shall also have the right to install and operate any necessary sampling and monitoring equipment on the premises of the user, at a fee cost to the user, to document compliance.
5. The user shall provide a discharge sampling point and Manteca staff shall have access to the sampling point at all reasonable times. Manteca has the right to observe any waste sampling conducted by the user.
6. In the event of an emergency or a spill on the user’s premises, the user shall notify the Manteca POTW and the Fire Department that a spill has occurred or is occurring and of the type of spill, including the content, volume, location, and approximate time that the spill occurred or began. Notification to Manteca of a spill implies consent for Manteca to enter and inspect the premises. Manteca staff may enter and inspect the premises at that time, as reasonable, to abate the spill or emergency event and to determine the circumstances of the spill event.
B.
Monitoring Requirements. Manteca may require users to monitor their discharge to the water pollution control system and report the results of the monitoring to Manteca periodically. These monitoring and reporting requirements are specific to the discharger, and are listed in the industrial discharge permit. The assistant director of public works may require additional monitoring and reporting to document compliance.
1. Manteca may require waste dischargers to install and operate monitoring facilities at the point of discharge to the water pollution control system, at the expense of the discharger. Manteca may also choose to install and operate monitoring facilities on the premises of the discharger to document compliance. These Manteca installed and operated facilities, if required, will be at a fee cost to the user. The monitoring facilities will be constructed, installed and operated to allow for inspection, sampling, and measurement of flow or other parameters of the regulated discharge. The monitoring facilities shall be in accordance with Manteca construction standards and specifications. The facilities also shall be maintained at all times in a safe and proper operating condition at the expense of the discharger.
2. Manteca may require the discharger to conduct sampling and analysis of the discharge at a frequency and type as specified by the assistant director of public works or as required by the federal Pretreatment Regulations to demonstrate compliance with the prescribed waste discharge limits.
C. Sampling. The user shall sample his or her discharge to the waste pollution control system at the frequency provided in the industrial discharge permit or as deemed reasonable and necessary by the assistant director of public works to demonstrate compliance. The assistant director of public works may require sampling to be conducted by nonpermitted users, at his or her discretion, or if noncompliance is suspected, in which case, nonpermitted dischargers will be subject to the same sampling and reporting requirements as permitted dischargers. The discharger shall use the sampling and test procedures prescribed in 40 CFR Part 136 “Guidelines Establishing Test Procedures for the Analysis of Pollutants,” or amendments thereto, or otherwise approved by EPA. Manteca also may specify additional sampling requirements or conduct sampling as necessary and reasonable to insure compliance with this chapter and/or the industrial discharge permit.
Initial sampling equipment and methods shall be observed by the assistant director of public works or his or her agent.
Before conducting initial sampling, the user shall notify Manteca three days in advance and schedule a time for Manteca staff to be present to observe the sampling procedure. All sampling required by the industrial discharge permit, this chapter, or Manteca shall be at the expense of the user. The installation of sampling equipment and/or the conducting of sampling on the user’s premises is at a fee cost to the user. All discharge samples for monitoring and reporting shall be analyzed at a laboratory facility approved by the assistant director of public works.
D.
Pretreatment. Persons discharging waste to the Manteca water pollution control system shall install and operate any necessary wastewater treatment facilities or equipment as required by the assistant director of public works to achieve compliance with this chapter and all national pretreatment standards, within the time limitations specified in the National Pretreatment Regulations, this chapter, or the industrial discharge permit, whichever occurs first. Any pretreatment facilities or equipment required to bring the discharge in compliance with federal regulations, the requirements of this chapter, or the industrial discharge permit shall be provided by the user at his or her expense.
Detailed plans for the construction and operation of the pretreatment facilities shall be provided to Manteca for review and approval prior to commencing construction. However, the review and approval of such plans shall in no way relieve the user of the responsibility to modify the pretreatment facilities, equipment, or operating procedures as necessary to bring the discharge to an acceptable level of treatment. Any subsequent changes to the design, installation, construction, or operation of the pretreatment facilities or equipment shall be reported to Manteca in writing and shall be acceptable ATTACHMENT 2
to Manteca prior initiating such changes.
Manteca may specify operational and/or recording procedures relative to routine operation of the pretreatment facilities.
Such requirements may include, but are not limited to, operation and maintenance manuals, operation logbooks, operator training, and on-site storage of spare parts and reserve treatment chemicals.
E. Restaurant Grease Traps. Restaurant process drains shall be connected to a grease trap of a size and design deemed sufficient by the assistant director of public works. These will be accessible for inspection by the assistant director of public works or his or her agent at all reasonable times. The traps will be maintained as deemed sufficient by the assistant director of public works. (Ord. 1275 § 2 (part), 2004)
13.20.080 Confidentiality.
All information and data submitted by the industrial user or obtained from the user, in accordance with this chapter, shall be available to the public and/or governmental agencies without restriction, unless protected by state law. (Ord. 1275 § 2 (part), 2004)
13.20.090 Enforcement.
A. Enforcement Mechanisms. This section presents the enforcement mechanisms and penalties available to the city of Manteca to respond to instances of noncompliance. The remedies for noncompliance, enforcement mechanisms, and penalties are cumulative.
The intent of this subsection is to provide adequate mechanisms to achieve a maximum degree of compliance from all waste dischargers. The following enforcement provisions apply to all users of the Manteca water pollution control system, either directly or indirectly, to the extent that a user violates any provision of this chapter, the industrial discharge permit, or an administrative order issued by Manteca.
1. Notice of Violation (NOV). An NOV is always presented to the user in writing. An NOV may be issued by the assistant director of public works or his or her agent in response to minor violations of this chapter or the industrial discharge permit. Manteca shall issue an NOV within ten working days of a violation or notification that a violation has occurred. In an emergency, Manteca may issue a verbal NOV which will be followed by a written notice.
An NOV may also contain specific actions for the user to complete such as conducting additional sampling, monitoring, or reporting, or applying for an industrial discharge permit or permit renewal.
2. Noncompliance Fees. Manteca has the authority to assess fees for the reimbursement of costs accrued by Manteca as a result of a violation by a user.
a.
Sampling and Inspection Fees. The assistant director of public works may assess fees to the user for additional sampling, inspection, monitoring, or the installation of Manteca equipment on the user’s premises to sample or monitor a discharge.
b.
Damage Fee. The assistant director of public works may also assess damage fees to recover costs for damage to the water pollution control system, Manteca, or the environment as a result of a discharge violation.
c.
Permit Violation Fee. The assistant director of public works may assess a permit violation fee to recover costs for fines assessed to Manteca as a result of a violation of its NPDES permit or any other federal, California state, or local permit. The assistant director of public works also may include reimbursement of costs accrued by Manteca for additional sampling, inspection, environmental clean up, lab fees, and any other costs incurred by Manteca as a result of the permit violation. These costs may be included as part of the Permit Violation Fee and Damage Fee which may be assessed to the user, if the discharge violation caused, singly or in combination with other discharges, Manteca to violate its permit. This includes an increase in the order of magnitude of the Manteca permit violation.
3. Suspend Service. Manteca has the authority to suspend service to any user found in violation of this chapter, the industrial discharge permit, California state and/or federal regulations, or the local limits.
The director of public works or his or her agent may also suspend service in instances when a user refuses ATTACHMENT 2
Manteca staff entry to the user’s premises for inspection, monitoring, or sampling purposes or to abate a perceived illegal discharge. The suspension of service may remain in force until the user allows entry to the premises.
4. Administrative Order. Manteca has the authority to issue an administrative order to bring a user into compliance. An administrative order maybe either a cease and desist order, show cause order, or compliance order.
The filing of an administrative order is under the discretion of the director and/or assistant director of public works and is considered to be an intermediate step to enforcing compliance.
5. Annual Publication of SNC Dischargers. In order to comply with federal Pretreatment Regulations, 40 CFR 403.8(F)(2)(g), and to encourage users to remain in compliance, Manteca shall annually publish a list of all users which were in significant noncompliance (SNC) at any time in the past twelve months. This public notification shall be in the largest daily newspaper published in the service area.
6. Other Noncompliance Penalties. The following enforcement measures will be used in instances of serious noncompliance, usually resulting in extreme damage to the water pollution control system, or from fraudulent practices, criminal noncompliance, violation of an administrative order, violation of a compliance schedule, or negligent or intentional discharge of waste which causes a threat to the health and/or safety of the public, Manteca personnel, or the environment.
a. Terminate Service. Waste discharge service to the water pollution control system may be terminated, by disconnection of a user’s sewer connection, upon written notice by the director of public works or his or her agent for any of the following reasons:
i.
Violation of an administrative order;
ii. Refusal to cooperate with Manteca staff or comply with Manteca policies; iii.
Refusal to allow Manteca staff reasonable access to a premise for purposes of inspection, monitoring, or abating an illegal discharge;
iv.
Fraudulent actions relating to reporting, self-monitoring, or Manteca sampling or inspection; or v.
One or more serious violations which endanger the health and/or safety of the public or Manteca personnel or which endangers the water pollution control system and/or the environment. b.
Pursuit of Criminal Prosecution. Where Manteca or its director of public works determines that a criminal violation of this chapter has occurred, Manteca may pursue criminal prosecution, pursuant to provisions of the federal Clean Water Act and California Government Code Sections 54725 and 54739. For each violation the offender may receive thirty days in jail or a fine of one thousand dollars or both. A violation may be recorded for each instance of non-compliance and for each day the noncompliance occurred.
c.
Pursuit of Civil Action. Where deemed appropriate by the director of public works and the City Attorney, Manteca will pursue civil action. Actions taken may include, but are not limited to: civil suits for damage to the water pollution control system, injunctive relief, and/or civil penalties. Civil actions may be pursued on a strict liability basis, regardless of intent, and shall include reimbursement for all costs incurred by Manteca, including costs for repair, administrative costs, and a penalty of twenty-five thousand dollars per day for each violation pursuant to California Government Code 54740.
B.
Costs for Enforcement Actions. All costs accrued by Manteca to undertake enforcement actions shall be paid by the user in violation. These costs include, but are not limited to, all fees described in Section 13.020.090(A)(2) of this chapter, attorney’s fees, and fees associated with termination of service. All such fees are payable to Manteca and are in addition to any costs accrued by member jurisdictions. All such fees are due and payable upon receipt of notice.
Delinquent fees will result in delinquent charges and/or enforcement actions, as described in Section 13.020.050(D) of this chapter.
C.
Emergency Powers. The director of public works or his or her agent shall have full power and authority to take any necessary precautions and measures to protect the water pollution control system, POTW personnel, public, and the environment from endangerment or threat of endangerment, or any condition that is likely to result in a discharge which presents an imminent hazard to the public health, safety, or welfare; or which, either singly or by interaction with other discharges, is an imminent hazard to the water pollution control system, places Manteca in violation of its NPDES permit or any other California state or federal law or permits. The available precautionary measures include suspension of wastewater treatment and collection services and/or an industrial discharge permit, issuance of a cease and desist ATTACHMENT 2
order, and/or any of the following: decontamination, sewer closure, packaging, diking, and transportation of materials, in order to protect life or property, or to prevent further damage to the environment of the water pollution control system. In pursuit of such precautionary measures, Manteca personnel or any agent of the city of Manteca shall have immediate access to the premises. In addition, the director of public works or his or her agent shall have the authority to prohibit approach to the scene of such an emergency any vehicle, vessel, or thing, and all persons not specifically employed in the correction of the emergency condition or the preservation of life or property in the vicinity thereof.
Any user receiving cease and desist order or requested to suspend discharge to the water pollution control system from or by Manteca shall immediately cease or suspend the discharge or contribution to the water pollution control system.
In the event a user fails to voluntarily comply with the requirements of the cease and desist order or suspension of service, the director of public works shall take such steps as deemed necessary to halt the discharge or contribution; including severance of the user’s connection to the water pollution control system, to prevent or minimize damage to the POTW or endangerment to the public, the POTW, or the environment.
In addition to any enforcement actions issued to the user, the user shall submit a detailed written report of the emergency condition to the director of public works within fifteen days of the occurrence. The detailed report shall describe the cause(s) of the emergency event or harmful contribution and the measures which have been taken to prevent any future or repeated occurrence.
D.
Disclosure of Information. All users are responsible for notifying Manteca of known violations of this chapter and/or the industrial discharge permit when they occur. In the event of a spill, accidental discharge, bypass of the pretreatment system, or the imminent danger of same, which may endanger the health or safety of Manteca staff, the public, or the environment is present, the user must immediately notify the Manteca director of public works or his or her agent by a phone call or in person. Dischargers must also notify Manteca of any changes to their operations which may change the quantity or quality of their discharge, prior to the change. Failure to notify Manteca of a violation, spill, bypass or accidental discharge is a violation of this chapter. (Ord. 1275 § 2 (part), 2004)
13.20.100 Hearings and appeals.
A. Any user, permit applicant, or permittee, found in violation of this chapter or the industrial discharge permit, or adversely affected by a decision, action, or determination of the director of public works, his or her agent, or Manteca interpreting or implementing this chapter or in any permit enforcement action issued herein, may file a written request for reconsideration of the decision, action, or determination within ten working days of notification of said decision, action, or determination. The written request for reconsideration shall detail facts supporting the user’s request, and such facts must include a statement listing all relevant facts which must be considered, including such facts that may not have been known or available to Manteca at the date of such decision, action, or determination.
B.
The assistant director of public works shall render decision in writing on the request for reconsideration within ten working days of receiving such request. If the decision on the request for reconsideration still is unacceptable to the user, the user may file a request for appeal to the director of public works, within ten working days of notice of the assistant director’s decision. When a written request for appeal has been received and logged with the director of public works, the director shall schedule a hearing within forty-five days from receipt of the request for appeal and the director of public works shall make a final ruling on the assistant director’s decision within ninety days from receiving the request for appeal.
C. Except where deemed appropriate by the director of public works, this reconsideration and appeal process described in this section of this chapter shall not halt or delay any enforcement action taken by Manteca.
D.
Manteca reserves the authority to designate a hearing officer to hear all testimony presented for a hearing or appeal. (Ord. 1275 § 2 (part), 2004)
13.20.110 Severability.
If any provision, paragraph, word, section or article of this chapter in invalidated by any court of competent jurisdiction, the remaining provision, paragraphs, words, sections and chapters shall not be affected and shall continue in full force and effect. (Ord. 1275 § 2 (part), 2004)
ATTACHMENT 2
13.20.110 - Fats, Oils and Grease (FOG) Control.
(A) Findings. The City of Manteca finds that, in order to provide for the public health and welfare, and to comply with the laws and regulations of the State of California, State Water Resources Control Board Order No. 2006-0003-DWQ Statewide General Waste Discharge Requirements for Sanitary Sewer Systems and amendments thereto, and the United States Government, it is necessary to set uniform requirements for all users of the city’s sanitary sewer system to include, but not limited to, the following:
1. To establish the appropriate authority for the city to condition or deny discharges to the city sewer system;
2. To prevent the introduction of excessive amounts of grease into the city sewer system that may cause a Sanitary Sewer Overflow (SSO) to occur;
3. To prevent the clogging or blocking of the city sewer lines due to grease buildup causing backup and flooding of streets, residences, and commercial buildings;
4. To implement a procedure to recover the costs incurred in cleaning and maintenance of sewer lines and the disposal of grease blockages;
5. To implement a procedure to recover costs for any liability incurred by the city for damage caused by grease blockages resulting in the flooding of streets, residences or commercial buildings;
6. To establish requirements to install grease removal devices (such as traps or interceptors), design standards for the removal devices, maintenance requirements, BMP requirements, record keeping and reporting requirements. Additionally, to establish enforcement procedures for violations of any part or requirement of this chapter; and
7. To establish the authority for the city to carry out routine and non-routine monitoring (sampling and inspections) of the grease traps and the Food Service Establishments. (B) Applicability. The terms and conditions of this chapter shall apply to all Food Service Establishments (FSEs) to include restaurants, cafeterias, food preparation facilities, convenience stores preparing fast foods for sale; grocery stores providing cooked foods for sale; and other food preparation facilities.
(C) Definitions.
“City” means the city of Manteca, California, employees of the city, or an authorized agent of the city.
“Discharger” means the Food Service Establishments that is discharging gray water to the city sewer system.
“Food Service Establishments” or “FSEs” means any business which prepares and/or packages food or beverages for sale or consumption, on- or off-site, with the exception of private residences. Food service facilities shall include, but are not limited to, food courts, ATTACHMENT 2
ORDINANCE NO. 1274
PAGE NO. 2
food manufacturers with an average daily discharge volume of twenty-five thousand (25,000) gallons per day or less, food packagers, restaurants, grocery stores, bakeries, lounges, hospitals, hotels, nursing homes, churches, schools, and all other food service facilities not listed in this chapter.
“Garbage disposal” means a device which shreds or grinds up waste materials into smaller portions for discharge into the city’s sanitary sewer system. “Gray water” means all of the liquid contained in a grease interceptor that lies below the floating grease layer and above the food solids layer. “Grease” means a material either liquid or solid, composed primarily of fats, oils and grease from animal or vegetable sources. The terms “fats, oils, and grease (FOG),” “oil and grease” or “oil and grease substances” shall all be included within this definition. “Grease interceptor” means a device located underground and outside of the Food Service Establishment designed to collect, contain or remove food wastes and grease from the wastestream while allowing the balance of the liquid wastes (gray water) to discharge to the wastewater collection system by gravity. Interceptors shall have at least one inspection hatch on the top surface to facilitate inspection, cleaning and maintenance. “Grease trap” means a device located in a Food Service Establishments or under a sink designed to collect, contain, or remove food wastes and grease from the wastestream while allowing the balance of the liquid waste (gray water) to discharge to the wastewater collection system by gravity. Traps shall have a removable lid on the top surface to facilitate inspection, cleaning and maintenance.
“Grease trap service company” means a person, or company, who provides maintenance services for grease traps and interceptors. Maintenance services to include cleaning, minor repairs, grease and solids removal from the interceptor, and transport of the removed material to an appropriate recycling or disposal facility. “Sanitary Sewer Overflows (SSOs)” means overflows from sanitary sewer systems of domestic wastewater, as well as industrial and commercial wastewater, depending on the pattern of land uses in the area served by the sanitary sewer system. SSOs often contain high levels of suspended solids, pathogenic organisms, toxic pollutants, nutrients, oxygen-demanding organic compounds, oil and grease and other pollutants. SSOs may cause a public nuisance, particularly when raw untreated wastewater is discharged to areas with high public exposure, such as streets or surface waters used for drinking, fishing, or body contact recreation. SSOs may pollute surface or ground waters, threaten public health, adversely affect aquatic life, and impair the recreational use and aesthetic enjoyment of surface waters. Any overflow, spill, release, discharge or diversion of untreated or partially treated wastewater from a sanitary sewer system.
SSOs include:
(i) Overflows or releases of untreated or partially treated wastewater that ATTACHMENT 2
ORDINANCE NO. 1274
PAGE NO. 3
reach waters of the United States;
(ii) Overflows or releases of untreated or partially treated wastewater that do not reach waters of the United States; and
(iii) Wastewater backups into buildings and on private property that are caused by blockages or flow conditions within the publicly owned portion of a sanitary sewer system.
“Waste grease” means fats, oils, and grease that can be collected following use and prior to discharge to the sewer or interceptor. Waste grease is collected from pans, deep fat fryers and cooking grills.
(D) Grease Interceptor/Trap Required.
1. Grease interceptors and/or traps shall be provided by the facility owner, when, in the opinion of the city, they are necessary to prevent grease in excessive amounts from entering the sanitary sewer system. All interceptors shall be of a type and capacity approved by the city building division and shall be located as to be easily and safely accessible for cleaning and inspection. All prospective grease trap users must provide manufacturer’s capacity data and an estimate of the product rate at the facility that is within the capacity of the grease trap to be approved by the building permit department.
2. Existing Facilities. For the purposes of sizing and installation of grease interceptors/traps, all food service facilities existing within the city’s sewer system service area, whether within, or without, the city limits, prior to the effective date of the ordinance codified in this chapter shall be allowed to operate and maintain existing grease interceptors/traps provided their grease interceptors or grease traps are in efficient operating conditions.
On or after the effective date of the ordinance codified in this chapter, the city may require an existing food service facility to install, operate, and maintain a new grease interceptor or trap that complies with the requirements of this chapter or to modify, repair, or replace any noncompliant interceptor or trap within ninety (90) days of written notification by the city when any one or more of the following conditions exist:
a. The facility is found to be contributing grease and oil in quantities sufficient to cause line stoppages or necessitates increased maintenance on the wastewater collection system.
b. The facility does not have a grease interceptor or trap. c. The facility has an undersized, nonrepairable or defective grease interceptor or trap.
d. Remodeling of the food preparation or kitchen waste plumbing system is performed which requires a building permit to be issued by the city. e. The existing facility is sold or undergoes a change of ownership.
ATTACHMENT 2
ORDINANCE NO. 1274
PAGE NO. 4
f. The existing facility does not have plumbing connections to a grease interceptor or trap in compliance with the requirements of this chapter, or current building codes.
3. New Facilities or New Interceptor Installations. Grease interceptors or traps shall be located in the Food Service Establishment’s lateral sewer line between all fixtures which may introduce grease into the sewer system and the connection to the city’s wastewater collections system. If dishwashers are connected to the grease interceptor, the interceptor must be properly designed to contain and cool the dishwasher discharge to prevent the hot water from causing carry through of the grease. Garbage disposals and restrooms should not be plumbed to the grease interceptor. Automatic hood washers, floor drains in food preparation and storage areas should be plumbed to the grease interceptor. Sanitary facilities (restrooms) shall not be plumbed to the grease interceptor under any circumstance.
4. The use of a grease trap, in-place of a grease interceptor will only be authorized for those facilities that do not operate a deep fat fryer, a cooking grill and conducts minimal dishwashing.
(E) Maintenance of Grease Interceptor/Trap Required.
1. All grease interceptors and grease traps shall be continuously maintained in satisfactory and effective operational condition by the discharger at the discharger’s expense.
Typically maintenance consists of the removal of floatable solids and settleable solids collected in the grease interceptor/trap; and the cleaning of the walls and piping.
2. Routine Maintenance Schedules. The discharger is responsible for establishing a routine maintenance schedule that includes the routine removal of floatable and settleable solids and cleaning of the interceptors/traps. The maintenance frequency should be such that the interceptor/trap does not allow fats, grease, oils, and food solids from leaving the interceptor and entering the city sewer collection system. The amount of time between pumping and cleaning services is dependent on the volume of wastes discharged, the volume of the interceptor/trap, and the physical integrity of the interceptor/trap structures and piping. It is the discharger’s responsibility that the interceptors/traps are routinely inspected and repaired as needed.
3. Record Keeping Requirements.
a. The discharger is responsible for maintaining appropriate maintenance records that documents the routine pumping, cleaning, and repairs made to interceptors and traps. Where the discharger hires a grease trap service company to clean the interceptor/trap and remove and dispose of the accumulated grease and solids, a copy of the pumping manifest or billing must be retained with the maintenance records. All maintenance records should include at a minimum the following information:
i. Name of facility;
ii. Date service performed;
ATTACHMENT 2
ORDINANCE NO. 1274
PAGE NO. 5
iii. Total volume of the interceptor/trap;
iv. Total volume of material removed from the interceptor/trap; v. List of all deficiencies identified from an inspection of the empty interceptor/trap; vi. Name of the grease trap service company;
vii. Address of the grease trap service company;
viii. Name and address of final disposal site;
ix. Signature of the grease trap service company employee performing the work; and
x. Signature of the discharger’s employee observing and accepting the services.
4. Record Retention. All grease interceptor/trap maintenance records shall be retained for a period of not less than three years. These records shall be retained at the Food Service Establishment and shall be made available for inspection by the city. (F) Disposal of Wastes from Interceptors and Traps. Storage, handling, transportation and disposal of all wastes from interceptors/traps shall be performed in accordance with applicable federal, state, and local regulations that pertain to the type and/or class of waste. Materials removed from waste interceptors/traps must be disposed of at legally designated locations for those specific type wastes. Materials removed from waste interceptors/traps shall not be discharged to the city sanitary sewers or storm drains. (G) Collection, Storage, and Disposal of Waste Grease and Solids. Dischargers are encouraged to collect excess oil and grease from deep fat fryers, pots and pans prior to washing. This waste grease and oil should be collected and stored in appropriate containers that are appropriated labeled. The collected waste grease and oil should be collected by a waste grease service company for disposal. In no case shall the discharger dispose of deep fat fryer oils and other collected waste greases and oils by discharge to the grease interceptor/trap to the city sewer system.
(H) Clean up of Spilled Grease and Oil. The discharger shall clean up all spilled grease and oil using appropriate tools, including a mop and bucket. Bucket contents may be discharged to the grease interceptor/trap, and solid greases and oils that can be manually picked up should be held in the waste grease collection containers for final disposal. In no instance shall spilled grease and oils be washed to the stormwater drains. In the event that the city is required to clean up a grease and oil spill generated by a discharger, the city is authorized to assess cost recovery fees to the discharger for all costs associated with the clean up.
(I) Use of Chemicals and Other Additives. The use of chemicals, emulsifying agents, enzymes, microorganisms, and/or other additives that are added to the grease interceptors/traps to reduce or eliminate the pumping and cleaning of the interceptor/trap is ATTACHMENT 2
ORDINANCE NO. 1274
PAGE NO. 6
prohibited. Dischargers currently using a chemical or other additive must halt such use immediately on the effective date of the ordinance codified in this chapter. (J) Right of Access. The city, employees of the city, or authorized agents of the city, have the authority to enter the property of the discharger to conduct inspections of the entire facility, including the interceptors, traps, cooking and storage areas, restrooms, offices, service areas, and other areas of the facility. The city is also authorized to collect samples of any wastestream, including the discharge from the facility and the interceptors and traps. The city may obtain search warrants for inspection and sampling purposes. Failure to grant access may result in the suspension of sewer and water services provided by the city. (K) Enforcement. Failure to comply with the provisions of this chapter is considered a misdemeanor and subject to enforcement actions under the city codes. In addition, to these misdemeanor enforcement actions the city is authorized to take the following actions to achieve compliance to the city chapter.
1. Mandatory Interceptor/Trap Service. The city may issue an order requiring the discharger to conduct interceptor/trap maintenance services within a mandatory time period.
The cost of the services shall be the direct responsibility of the discharger.
2. Mandatory Interceptor/Trap Service Schedule. The city may impose a mandatory pumping and cleaning schedule to assure the proper maintenance of an interceptor not properly maintained by the discharger. The cost of the services shall be the direct responsibility of the discharger. Mandatory service schedules may cover a time period of up to three years.
3. Cost Recovery. The city may assess the discharger the amount of those expenditures made by the city to clean up or prevent sewer blockages and overflows caused by the discharge from a Food Service Establishment.
4. Administrative Fines. The city may assess fines to the discharger, not to exceed one thousand dollars ($1,000.00) per day per violation, for violations of the city chapter. a. Unpaid charges, fines, and penalties shall, after sixty (60) calendar days, be assessed an additional penalty of twenty-five percent (25%) of the unpaid balance, and interest shall accrue thereafter at a rate of one percent per month. A lien against the user’s property will be sought for unpaid charges, fines and penalties. b. Users desiring to dispute such fines must file a written request for the city to reconsider the fine along with full payment of the fine amount within thirty (30) days of being notified of the fine. Where a request has merit, the city may convene a hearing on the matter.
In the event the user’s appeal is successful, the payment, together with any interest accruing thereto, shall be returned to the user. The city may add the costs of preparing administrative enforcement actions, such as notices and orders, to the fine. c. Issuance of an administrative fine shall not be a bar against, or a prerequisite for, taking any other action against the user.
ATTACHMENT 2
ORDINANCE NO. 1274
PAGE NO. 7
d. Wastewater Discharge Permit Issuance. The city may issue wastewater discharge permits to Food Service Establishments either on a case-by-case basis or as part of a general program. The authority and requirements established by this Industrial Waste Ordinance shall apply to all such wastewater discharge permits issued under this section.
4. Emergency Suspensions. The city may immediately suspend a discharge and/or water services, after informal notice to the discharger, whenever such suspension is necessary to stop an actual or threatened discharge which reasonably appears to discharge to the waters of the United States or cause an imminent or substantial endangerment to the health or welfare of persons.
13.020.110 – Severability
(a) If any provision, paragraph, word, section, or article of this Waste Ordinance in invalidated by any court of competent jurisdiction, the remaining provision, paragraphs, words, sections, and chapters shall not be affected and shall continue in full force and effect.
SECTION III: EFFECTIVE DATE:
This Ordinance shall become effective 30 days from adoption.
SECTION IV: PUBLICATION:
Within fifteen (15) days after the adoption of this Ordinance, the City Clerk shall cause a copy of this Ordinance to be published once in the Manteca Bulletin, a newspaper of general circulation, along with a notice setting forth the date of adoption and the title of this Ordinance.
DATED: September 20, 2004
AYES: Councilmembers DeBrum, Harris, Hernandez, Snyder and Weatherford NOES: None
ABSTAIN: None
ABSENT: None
WILLIE W. WEATHERFORD
MAYOR
ATTEST:
JOANN TILTON, CMC
CITY CLERK
CERTIFICATE
ATTACHMENT 2
ORDINANCE NO. 1274
PAGE NO. 8
I, JOANN TILTON, CITY CLERK of the City of Manteca. do hereby certify that Ordinance No. 1274 was INTRODUCED at a regular meeting of the City Council of the City of Manteca on the 7th day of September, 2004 and was PASSED AND ADOPTED at an adjourned regular meeting of said Council on the 20th day of September, 2004.
JOANN TILTON, CMC
CITY CLERK
ATTACHMENT 2
Manteca Municipal Code
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Title 13 PUBLIC SERVICES
Chapter 13.24 SEPTIC TANK CLEANING
13.24.010 Purpose.
The purpose of this chapter and of the receiving station service fees and charges prescribed under this chapter is to regulate the discharge of domestic septic tank cleanings, portable toilet wastes, leach pit and cesspool contents into the receiving station facilities at the city wastewater control facility and to derive revenue which shall be used only for the acquisition, construction, reconstruction, maintenance and operation of the city wastewater control facility receiving station and sewage treatment plant facilities. (Prior code § 14-24)
13.24.020 Permit—Required.
No person shall deliver or discharge domestic septic tank cleanings into the city wastewater control facility receiving station facilities approved for such delivery and discharge, unless such person has a valid and subsisting receiving station use permit (“permit” in this chapter) issued by the city pursuant to the provision of this chapter. (Prior code § 14-25)
13.24.030 Permit—Issuance.
A. No person shall be issued a permit under this chapter to use the receiving station facilities to deliver and discharge domestic septic tank cleanings unless such person has filed with and furnished to the city’s department of public works the following:
1. An application on a form provided;
2. The cash or corporate surety bond in the sum of one thousand dollars described in Section 13.24.050;
3. The insurance policies and/or certificates required by this chapter; and
4. Evidence of current unrevoked registration with the San Joaquin local health district under Chapter 6 of Division 20 of the California Health and Safety Code authorizing such person to engage in the business of disposing of the cleanings of domestic septic tanks.
B.
Upon receipt thereof, the city’s public works department shall issue such permit to the applicant. (Prior code § 14- 26)
13.24.040 Permit—Nontransferable.
A permit issued under this chapter is personal to the applicant to whom it is issued and is not subject to transfer or assignment. (Prior code § 14-27)
13.24.050 Permit—Suspension—Revocation.
A. The director of public works or his or her authorized deputy may, upon reasonable notice and hearing, suspend or revoke any permit issued under this chapter if he or she finds and determines that any person:
1. Has submitted a permit application that is false in any material respect; or
2. Has failed to maintain in full force and effect, the bonds or insurance required under this chapter; or
3. Has personally or through an employee or other person engaged to do so, delivered or discharged any substances other than the cleanings of domestic septic tanks, etc., into the receiving station facilities or has delivered or discharged therein any substances prohibited from discharge into the city’s sanitary sewer system under the provisions of Ordinance No. 435 or this chapter; or
4. Has disposed of any sanitary sewage or waste in an unlawful manner anywhere within the service area; or
5. Has violated any state, county or city law or regulation regarding the hauling of sanitary sewage, including ATTACHMENT 2
liquid wastes; or
6. Has failed to maintain an unrevoked registration for disposition of septic tank cleanings under California Health and Safety Code Section 25000 et seq., where required to dispose of such cleanings under this chapter;
7. Has failed to conform to any provision of the ordinance required to be complied with by him or her; or
8. Has failed to pay, before delinquency, any fee or charge due under this chapter.
B.
If the director determines by reason of emergency circumstances that the immediate preservation of the public health and safety require that such permit be suspended immediately and without prior hearing, he or she may do so; provided, however, that he or she shall make written finding as to the emergency circumstances which justify such immediate action and forthwith give to permittee written notice thereof of the time, not exceeding fifteen days, when the director will conduct a hearing to determine whether such suspension shall be continued and/or the permit shall be revoked.
C. Notice of any proceeding under this chapter shall be served personally upon the permittee or by registered mail addressed to permittee as may be known to the director of public works. (Prior code § 14-41)
13.24.060 Bond—Required.
A. No person shall deliver or discharge the cleanings of domestic septic tanks into the city wastewater control facility receiving station facilities unless such person maintains in full force and effect a cash bond or a corporate surety bond in the sum of one thousand dollars in form approved by the city attorney, conditioned upon the faithful performance by the permittee under this chapter.
B.
The condition of the bond shall be that the amount thereof shall be paid to the city if the permittee does any of the following:
1. Delivers or discharges any substance other than the cleanings of domestic septic tanks, etc., into the city wastewater control facility receiving station facilities; or
2. Discharges therein any of those substances which, by Ordinance No.435 are prohibited from discharge into the city’s sanitary sewer system (referred to in this chapter as “prohibited substances”); or
3. Dispose of sewage or wastes in an unlawful manner within the service area of the receiving station; or
4. Is delinquent in paying for charges and fees billed by the director of finance under this chapter; or
5. Otherwise fails to comply with the provisions of this chapter.
C.
Upon payment of any sum to city under such bond, the permittee shall immediately furnish and file with the city such cash surety bonds as may again equal the total amount of the bond required under this chapter.
D.
No interest shall be paid by the city or permittee on any cash bond deposited. (Prior code § 14-28)
13.24.070 Bond—Remedy not exclusive.
The remedies providing for satisfaction of this chapter are cumulative and not exclusive, and are in addition to any other remedies to which the city may be lawfully entitled. Each person shall remain personally liable for any obligation or liability incurred in operations to the extent that bond proceeds are insufficient to satisfy the same. (Prior code § 14-29)
13.24.080 Insurance.
A. No person shall deliver or discharge the cleanings of domestic septic tanks, etc., into the city wastewater control facility receiving station facilities unless such person, at his or her sole cost and expense, maintains in full force and effect the following policies:
1. Public liability and property damage insurance insuring such person against claims for personal injury and property damage, (including motor vehicle coverage) which may arise by reason of the nature of the work or from the operations conducted by such person, his or her officers, employees, and all other persons engaged to conduct such operations by this chapter.
2. A separate policy or policies naming the city and their officers and employees as sole insureds, insuring ATTACHMENT 2
against all operations conducted by, for or on behalf of such person, and insuring against the omissions and supervisory acts of the city, their officers and employees with respect to the operations; the policy shall provide or contain an endorsement that the coverage afforded thereby shall be primary coverage to the full extent of liability stated in the declarations, and that if the city or its officers or employees have other insurance against the loss covered by the policy, such other insurance shall be excess insurance only.
B. Each such policy shall provide coverage in the following minimum amounts: for personal injury, including death, one hundred thousand dollars per person, three hundred thousand dollars for more than one person, per occurrence; property damage fifty thousand dollars on account of any one occurrence, with an aggregate limit of not less than two hundred thousand dollars for any policy year.
C. Each such policy shall bear an endorsement precluding cancellation or reduction in coverage unless, not less than ten days prior thereto, written notice is given by the insurer to the: City Clerk, City Hall, 1001 West Center Street, Manteca, California 95336.
D.
The permittee shall cause to be filed with the city clerk a certificate of insurance issued by the insurer evidencing the policy required under subdivision 1 of subsection A of this section, and the original policy required under subdivision 2 of subsection A of this section. Not less than ten days prior to the effective date of cancellation, expiration or other termination of each such policy, the permittee shall cause replacement coverage to be filed with the license collector.
E.
The city clerk shall file all certificates and insurance policies received under this chapter. (Prior code § 14-30)
13.24.090 Charges—Fees.
A. The following charges and fees shall be required to be paid for the delivery and discharge of wastes as set forth in the city wastewater control facility receiving station facilities: For each load collected and delivered to the receiving station the charge is four dollars per thousand gallons or part thereof. Only wastes collected from within the county of San Joaquin shall be discharged to the receiving station.
B.
Said charges and fees may be changed by city council resolution. (Prior code § 14-31)
13.24.100 Source certification.
No person shall be permitted to deliver or discharge materials at the receiving station without delivering to the director of public works or his or her representatives, prior to such delivery or discharge, written certification of the source of collection of the material on a form approved by the director of public works. The source certification form shall note the date and time of collection, the city and street address of the property from which the materials were collected, and shall bear the signature of the owner or occupant of the property. (Prior code § 14-32)
13.24.110 Improper discharge.
No person shall deliver or discharge into the receiving station any industrial waste nor any substances whose discharge into the city’s sanitary sewer system is prohibited under Ordinance No. 435 notwithstanding that they may constitute the cleaning of domestic septic tanks, etc. (Prior code § 14-33)
13.24.120 Sludge and solids prohibited.
No person shall deliver or discharge into the receiving station facilities any sludge or solids of sewage treatment plants or water treatment plants from within or from outside the county of San Joaquin. (Prior code § 14-34)
13.24.130 Monitoring wastes.
A. The city shall have the right by and through its officers, employees or other persons engaged by the city to do so, to take such samples of materials delivered by any person into the receiving station facilities as the city in its sole discretion may deem appropriate to obtain a representation sample of each delivery’s contents. Such sample may be taken prior to, during, or after any such delivery and discharge. Without being limited thereto, results of analysis made ATTACHMENT 2
of such samples at the city wastewater control facility laboratory may be used to determine permittee’s conformance with the requirements of this chapter. By acceptance of the permit issued hereunder, the permittee consents and agrees that any such samples may be so taken and used.
B. In the event the city determines that any such delivery contains substances not permitted to be delivered or discharged under this chapter, the permittee shall forthwith comply with the city’s order or direction that they not be so delivered or discharged. (Prior code § 14-35)
13.24.140 Records—Billing.
A record of deliveries of the cleanings of domestic septic tanks, etc. shall be made at the time of each delivery to the receiving station and shall be signed by or on behalf of the permittee. Within fifteen days after the close of each calendar month, the director of finance shall prepare and mail an invoice to each permittee for fees and charges incurred by such permittee during such calendar month. (Prior code § 14-36)
13.24.150 Payment—Delinquency.
Fees and charges for the cleanings of domestic septic tanks, etc., delivered and discharged into the receiving station facilities shall be paid by the permittee at the office of the director of finance, City Hall, Manteca, California or at such other place as the director may provide. Such fees and charges are immediately due and payable upon the deposit of an invoice therefor in the United States mail; they are delinquent if payment is not received by the director of finance on or before the fortieth day immediately following the date when due and payable. (Prior code § 14-37)
13.24.160 Rules and regulations promulgation.
The director of public works is authorized to adopt rules, regulations and procedures relating to the operation of the receiving station, to establish a schedule of service and to provide a safe, efficient and sanitary use of the receiving station facilities and to implement the provisions of this chapter. The director may deny or suspend the use of receiving station facilities to any person who fails to comply with such rules, regulations and procedures. (Prior code § 14-38)
13.24.170 Compliance.
It is unlawful for any person to not comply with any written rule, regulation or procedure adopted by the director of public works pursuant to this chapter which relates to the delivery or discharge of wastes into receiving station facilities of the city wastewater control facility. (Prior code § 14-39)
13.24.180 Hauling vehicles identification.
Access to and use of receiving station facilities shall be granted only to vehicles bearing, in four-inch-high letters on both sides of the hauling vehicle, the name and address of the holder of a permit issued under this chapter and the vehicle load capacity. A copy of the city receiving station use permit as provided by the city must accompany the truck. (Prior code § 14- 40)
13.24.190 Director’s decision.
After any hearing required under this chapter, the director of public works shall make a written decision setting forth his or her findings and his or her action thereon. A copy of the decision shall be served upon permittee in the manner provided for notice of hearings; the decision is final in ten days after service. (Prior code § 14-42) ATTACHMENT 2
Manteca Municipal Code
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Title 13 PUBLIC SERVICES
Chapter 13.28 STORM WATER MANAGEMENT AND DISCHARGES
13.28.010 Purpose.
The purpose of this chapter is to establish minimum storm water management requirements and controls to protect and safeguard the general health, safety and welfare of the public residing in watersheds within the city of Manteca. This chapter seeks to meet that purpose through the following objectives:
A. Minimize increases in storm water runoff from any development in order to reduce flooding, siltation and stream bank erosion and maintain the integrity of drainage channels; B. Minimize increases in non-point source pollution caused by storm water runoff from development that would otherwise degrade local water quality;
C.
Minimize the total annual volume of surface water runoff that flows from any specific site during and following development to not exceed the pre-development hydrologic regime to the maximum extent practicable; and D. Reduce storm water runoff rates and volumes, soil erosion and non-point source pollution wherever possible, through storm water management controls and to ensure that these management controls are properly maintained and pose no threat to public safety. (Ord. 1253 § 1, 2004)
13.28.020 Definitions.
For purposes of this chapter the following terms have the following meanings:
“Accelerated erosion” means erosion caused by development activities that exceeds the natural processes by which the surface of the land is worn away by the action of water, wind or chemical action. “Best management practices” or “BMPs” means activities, practices, facilities and/or procedures that when implemented to their maximum efficiency will prevent or reduce pollutants in discharges and any program, technology, process, siting criteria, operational methods or measures or engineered systems that when implemented prevent, control, remove or reduce pollution. Examples of BMPs may include: public education and outreach, proper planning of development projects, proper cleaning of catch basin inlets and proper sludge or waste-handling and disposal, among others. “Building” means any structure, either temporary or permanent, having walls and a roof, designed for the shelter of any person, animal or property and occupying more than one hundred square feet of area. “Channel” means a natural or artificial watercourse with a definite bed and banks that conducts continuously or periodically flowing water.
“City” means the city of Manteca.
“Detention” means the temporary storage of storm runoff in a storm water management practice with the goals of controlling peak discharge rates and providing gravity settling of pollutants. “Developer” means a person who undertakes land disturbance activities. “Development” means any construction, rehabilitation, redevelopment or reconstruction of any public or private residential project (whether single-family, multi-unit or planned unit development); industrial, commercial, retail and other non-residential projects, including public agency projects: or mass grading for future construction. It does not include routine maintenance to maintain original line and grade, hydraulic capacity or original purposes of facility, nor does it include emergency construction activities required to immediately protect public health and safety. “Director” means the director of the city of Manteca’s department of public works. “Erosion and sediment control plan” means a plan that is designed to minimize the accelerated erosion and sediment runoff at a site during construction activities.
“Hazardous material” means any material that, because of its quantity, concentration or physical or chemical characteristics, poses a significant present or potential hazard to human health and safety or to the environment if released into the workplace or the environment.
ATTACHMENT 2
“Hazardous waste” means any hazardous waste having the characteristics identified under or listed pursuant to Section 6921 of Title 42 of the United States Code, but not including any waste the regulation of which has been suspended under the Solid Waste Disposal Act (42 U.S.C. Sec. 6901 et seq.) by act of Congress. “Illegal discharges” means any discharge to the MS4 system that is prohibited under local, state or federal statutes, chapters, codes or regulations. This includes all non-storm water discharges except discharges pursuant to a separate NPDES permit and discharges that are exempted or conditionally exempted in accordance with State Water Resources Control Board Water Quality Order No. 2003-0005-DWD, National Pollution Discharge Elimination System (NPDES) General Permit No. CAS 000004, Waste Discharge Requirements for Storm Water Discharges from Small Municipal Separate Storm Sewer Systems (General Permit).
“Illicit connections” means any human-made conveyance that is connected to the MS4 system without a permit, excluding roof drains and other similar types of connections. Examples include channels, pipelines, conduits, inlets or outlets that are connected directly to the MS4 system.
“Infiltration” means the process of percolating storm water into the subsoil. “Maintenance agreement” means a legally recorded document that acts as a property deed restriction and which provides for long-term maintenance of storm water management practices. “Material” means any substance including but not limited to: garbage and debris; lawn clippings, leaves and other vegetation; biological and fecal waste; sediment and sludge; oil and grease; gasoline; paints, solvents, cleaners and any fluid or solid containing chemicals.
“Municipal separate storm sewer system” or “MS4” means streets, gutters, conduits, natural or artificial drains, channels and watercourses or other facilities that are owned, operated, maintained or controlled by the city and used for the purpose of collecting, storing, transporting or disposing of storm water. “Non-point source pollution” means pollution from any source other than from any discernible, confined and discrete conveyances and includes but is not limited to pollutants from agricultural, mining, construction, subsurface disposal and urban runoff sources.
“NPDES permit” means a National Pollutant Discharge Elimination System (NPDES) Permit administered by the State of California, through its various regional water quality control boards. “Person” means any natural person, corporation, association, partnership or other entity. “Pollutant” means those “pollutants” defined in Section 502(6) of the Federal Clean Water Act (33 U.S.C. § 1362(6)) or incorporated into California Water Code § 13373. Examples of pollutants include but are not limited to the following:
1. Commercial and industrial waste such as fuels, solvents, detergents, plastic pellets, hazardous substances, fertilizers, pesticides, slag, ash and sludge;
2. Metals such as cadmium, lead, zinc, copper, silver, nickel and chromium and non-metals such as phosphorus and arsenic;
3. Petroleum hydrocarbons such as fuels, lubricants, surfactants, waste oils, solvents, coolants and grease);
4. Excessive eroded soils, sediment and particulate materials in amounts which may adversely affect the beneficial use of the receiving waters, flora or fauna of the state;
5. Animal wastes such as discharge from confinement facilities, kennels, pens, recreational facilities, stables and show facilities; and
6. Substances having characteristics such as pH less than six or greater than nine or unusual coloration or turbidity or excessive levels of fecal coliform, fecal streptococcus or enterococcus.
The term “pollutant” shall not include uncontaminated storm water, potable water or reclaimed water generated by a lawfully permitted water treatment facility.
The term “pollutant” also shall not include any substance identified in this definition if, through compliance with the best management practices (“BMPs”) available, the discharge of such substance has been reduced or eliminated to the maximum extent practicable. In an enforcement action, the burden shall be on the person who is the subject of such action to establish the reduction or elimination of the discharge to the maximum extent practicable through compliance with the available BMPs.
“Redevelopment” means any land disturbing activity occurring on existing developed property.
ATTACHMENT 2
“SSJID shared facilities” means facilities owned by the South San Joaquin Irrigation District (SSJID) that are also used by the city of Manteca for storm drainage.
“Spill” means to cause, allow or permit the flowing, running or falling, especially in an accidental manner, of any liquid, semi-liquid or solid substance or material.
“Storm water management” means the use of structural or non-structural practices that are designed to reduce storm water runoff pollutant loads, discharge volumes and/or peak flow discharge rates. “Storm water runoff” means water flow on the surface of the ground as the result of precipitation. “Urban runoff” means any flow of water originating from urban areas including but not limited to rain, irrigation, wash water and air conditioning condensate.
“Watercourse” means a permanent or intermittent stream or other body of water, either natural or man-made, which gathers or carries surface water. (Ord. 1253 § 1, 2004)
13.28.030 Prohibition of illegal discharges.
No person shall discharge, permit to be discharged or cause to be discharged any materials including but not limited to pollutants or waters containing any pollutants that cause or contribute to a violation of applicable water quality standards into either any part of the MS4 or any part of a water course.
A.
It is prohibited to throw, deposit, place, leave, maintain, keep or permit to be thrown, deposited, placed, left, maintained or kept any refuse, rubbish, garbage or any other discarded or abandoned objects, articles or accumulations in or upon any street, alley, sidewalk, storm drain, inlet, catch basin conduit or drainage structure, business place or upon any public or private plot of land in the city, so that the same might be or become a pollutant. No person shall throw or deposit litter in any fountain, pond, lake, stream or other body of water within the city. This subsection shall not apply to refuse, rubbish or garbage deposited in containers, bags or other appropriate receptacles which are placed in designated locations for regular solid waste pick up and disposal.
B. It is prohibited to intentionally dispose of leaves, dirt or other landscape debris into the MS4.
C.
No person shall discharge or allow the discharge of any of the following types of non-storm water discharges into the MS4, unless done pursuant to the terms and conditions of a separate NPDES permit or pursuant to an exemption issued by either the Central Valley Regional Water Quality Control Board (“regional board”) or the State Water Resources Control Board:
1. The discharge of untreated wash waters when gas stations, auto repair garages or other type of automotive service facilities are cleaned;
2. The discharge of untreated waste water from mobile auto washing, steam cleaning, mobile carpet cleaning and other such mobile commercial and industrial operations;
3. To the maximum extent practicable, discharges from areas where repair of machinery and equipment, including motor vehicles, which are visibly leaking oil, fluid or antifreeze, is undertaken;
4. Discharges of untreated runoff from storage areas of materials containing grease, oil or other hazardous substances and uncovered receptacles containing hazardous materials;
5. Discharges of commercial/municipal swimming pool filter backwash;
6. Discharges of untreated runoff from the washing of toxic materials from paved or unpaved areas; provided, however, that non-industrial and non-commercial activities which incidentally generate urban runoff, such as the hosing of sidewalks and the non-commercial hand-washing of cars, shall be excluded from this prohibition;
7. To the maximum extent practicable, discharges from washing impervious surfaces in industrial/commercial areas which results in a discharge of untreated runoff, unless specifically required by state’s, city’s or San Joaquin County’s health and safety codes or permitted under a separate NPDES permit;
8. Discharges from the washing out of concrete trucks;
9. Discharges of any pesticide, fungicide or herbicide banned by the United States Environmental Protection Agency (“USEPA”) or the California Department of Pesticide Regulation; or
10. The disposal of hazardous wastes into trash containers used for municipal trash disposal, where such disposal causes or threatens to cause a direct or indirect discharge to the MS4.
ATTACHMENT 2
(Ord. 1253 § 1, 2004)
13.28.035 Exceptions to discharge prohibitions.
The following discharges are excepted from the prohibitions set forth under Section 12.28.030:
A. Discharges from the following activities will not be considered a source of pollutants to the MS4 system and to waters of the United States when properly managed to ensure that no potential pollutants are present and therefore they shall not be considered illegal discharges unless determined to cause a violation of the provisions of the Porter-Cologne Act, Clean Water Act or this chapter: water line flushing, landscape irrigation, diverted stream flows, rising groundwater, uncontaminated groundwater infiltration (as defined at 40 CFR 35.2005(20)) to the MS4 system, uncontaminated pumped groundwater, discharges from potable water sources, foundation drains, air conditioning condensation, irrigation water, springs, water from crawl space pumps, footing drains, lawn watering, individual residential car washing, flows from riparian habitats and wetlands, dechlorinated swimming pool discharges and discharges or flows from fire fighting activities.
B. The prohibition shall not apply to any non-storm water discharge permitted under an NPDES permit, waiver or waste discharge order issued to the discharger and administered by the State of California under the authority of the USEPA, provided that the discharger is in full compliance with all requirements of the permit, waiver or order and other applicable laws and regulations and provided that written approval has been granted by the city for any discharge to the MS4.
C.
The prohibition shall not apply to irrigation and drainage waters under control of the South San Joaquin Irrigation District (SSJID) that are being transported by SSJID shared facilities.
D.
With written concurrence of the Regional Board, the city may exempt in writing other non-storm water discharges which are neither a source of pollutants to the MS4 system nor waters of the United States. (Ord. 1253 § 1, 2004)
13.28.040 Prohibition of illicit connections.
A. The construction, use, maintenance or continued existence of illicit connections to the MS4 system is prohibited.
B.
This prohibition expressly includes, without limitation, illicit connections made in the past, regardless of whether the connection was permissible under law or practices applicable or prevailing at the time of connection. (Ord. 1253 § 1, 2004)
13.28.050 Waste disposal prohibitions.
No person shall throw, deposit, leave, maintain, keep or permit to be thrown, deposited, left or maintained in or upon any public or private property, driveway, parking area, street, alley, sidewalk, component of the MS4 system or water of the United States any refuse, rubbish, garbage, litter or other discarded or abandoned objects, articles and accumulations, so that the same may cause or contribute to pollution. Wastes deposited in streets in proper waste receptacles for the purposes of collection are exempted from this prohibition. (Ord. 1253 § 1, 2004)
13.28.060 Discharges in violation of industrial or construction activity NPDES storm water discharge permit.
A. Any person subject to an industrial NPDES storm water discharge permit shall comply with all provisions of such permit. Proof of compliance with said permit may be required in a form acceptable to the director upon inspection of the facility, during any enforcement proceeding or action or for any other reasonable cause.
B.
Any person subject to a construction activity NPDES storm water discharge permit shall comply with all provisions of such permit. Proof of compliance with said permit may be required in a form acceptable to the director prior to or as a condition of a subdivision map, site plan, building permit or development or improvement plan; upon inspection of the facility; during any enforcement proceeding or action; or for any other reasonable cause. Prior to issuance of a construction permit a copy of the Notice of Intent (NOI) and the Storm Water Pollution Prevention Plan (SWPPP) shall be submitted to the city. (Ord. 1253 § 1, 2004) ATTACHMENT 2
13.28.070 Requirement to prevent, control and reduce storm water pollutants.
A. Authorization to Adopt and Impose Best Management Practices (BMP). The city will adopt requirements identifying best management practices for any activity, operation or facility which may cause or contribute to pollution or contamination of storm water, the MS4 system or waters of the United States as a separate BMP Guidance Series.
Where best management practice requirements are promulgated by the city or any federal, state of California or regional agency for any activity, operation or facility which would otherwise cause the discharge of pollutants to the MS4 system or water of the United States, every person undertaking such activity or operation or owning or operating such facility shall comply with such requirements.
B.
New Development and Redevelopment. The city may adopt requirements identifying appropriate design standards and best management practices to control the volume, rate and potential pollutant load of storm water runoff from new development and redevelopment projects as may be appropriate to minimize the generation, transport and discharge of pollutants. The city shall incorporate such requirements in any land use entitlement and construction or building-related permit to be issued relative to such development or redevelopment. The owner and developer shall comply with the terms, provisions and conditions of such land use entitlements and building permits as required in this chapter.
C. Responsibility to Implement Best Management Practices. Notwithstanding the presence or absence of requirements promulgated pursuant to subsections A and B, any person engaged in activities or operations or owning facilities or property which will or may result in pollutants entering storm water. The MS4 system or waters of the United States shall implement best management practices to the extent they are technologically achievable to prevent and reduce such pollutants. The owner or operator of a commercial or industrial establishment shall provide reasonable protection from accidental discharge of prohibited materials or other wastes into the MS4 or watercourses. facilities to prevent accidental discharge of prohibited materials or other wastes shall be provided and maintained at the owner or operator’s expense. Best management practices required by the city can be obtained from the public works department by requesting the BMP manual appropriate to a commercial or industrial activity from the BMP Guidance Series.
D.
Maintenance Agreements. All structural and non-structural permanent storm water BMPs not in the control of the city shall have an enforceable maintenance agreement to ensure the system functions as designed. The agreement shall include any and all maintenance easements required to access and inspect the storm water BMPs and to perform routine maintenance as required. Such agreements shall specify the parties responsible for the proper maintenance of all storm water BMPs. (Ord. 1253 § 1, 2004)
13.28.080 Landscaping and stabilization requirements.
Any area of land, not covered by an impervious surface, from which the natural vegetative cover has been either partially or wholly cleared or removed by development activities shall be landscaped within ten days from the substantial completion of such clearing and construction. No person shall use or otherwise employ impervious material, such as plastic, placed under decorative rock, bark or other landscape covers in meeting the landscaping requirements under this section. Backyards of residential single-family dwellings which would otherwise be covered by this section are exempt where storm water is contained on the property. (Ord. 1253 § 1, 2004)
13.28.090 Requirement to monitor and analyze.
The director may require by written notice that any person engaged in any activity and/or owning or operating any facility which may cause or contribute to storm water pollution, illegal discharges and/or non-storm water discharges to the MS4 or to the waters of the United States is to undertake at said person’s expense such monitoring and analyses and to furnish such reports to the city as the director shall deem necessary for determining that person’s compliance with this chapter. (Ord. 1253 § 1, 2004)
13.28.100 Spill prevention and response plan.
Any person subject to an Industrial NPDES storm water discharge permit shall maintain a spill prevention and response plan as part of their Storm Water Pollution Prevention Plan (SWPPP). The methods, procedures, mechanisms and facilities established and utilized for the purpose of preventing accidental discharges or spills of materials with pollution potential shall be provided and maintained at the owner’s or user’s own cost and expense. The SWPPP shall outline the user’s spill ATTACHMENT 2
prevention and response procedure, describe the nature and location of any chemicals stored on the user’s premises and shall contain procedures for immediately notifying the city and preventing adverse impacts of any discharge of chemicals, substances or materials. (Ord. 1253 § 1, 2004)
13.28.110 Prohibition of spills.
No person shall allow a spill to discharge into the MS4 or any watercourse. (Ord. 1253 § 1, 2004)
13.28.120 Notification of spills.
Notwithstanding other requirements of law, as soon as any person responsible for a facility or operation or responsible for emergency response for a facility or operation has information of any known or suspected release of materials which are resulting or may result in illegal discharges or pollutants discharging into storm water, the MS4 or water of the United States from said facility, said person shall take all necessary steps to ensure the discovery, containment and cleanup of such release.
In the event that a responsible person becomes aware of a release of hazardous materials, they shall immediately notify emergency response officials of the release via emergency dispatch services (i.e., by calling 911). In the event of a release of non-hazardous materials, the responsible person shall notify the city’s public works department in person, by phone or facsimile not later than five p.m. of the next business day. Notifications in person or by phone shall be confirmed by written notice addressed and mailed to the city’s public works department within three business days of the phone notice, lithe discharge of hazardous materials emanates from a commercial or industrial establishment, the owner or operator of such establishment shall also retain an on-site written record of the discharge and the actions taken to prevent its recurrence. Such records shall be retained for at least three years. (Ord. 1253 § 1, 2004)
13.28.130 Authority to inspect.
Whenever necessary to make an inspection to enforce any provision of this chapter or whenever the director has cause to believe that there exists or potentially exists, in or upon any premises within the city, any condition which constitutes a violation of this chapter, the director is authorized to enter such premises at all reasonable times for the purpose of inspecting said premises. The director is further authorized to inspect and copy all records at a facility which are related to storm water compliance. In the event that the owner or occupant of the premises refuses to allow either the director or persons authorized by the director to enter said premises for the purposes of conducting an inspection authorized by this chapter after the director or a person authorized by the director has asked the owner or occupant of said property to enter thereon for the purposes authorized by this chapter, the city may seek the assistance of a court of competent jurisdiction in order to facilitate the purposes of this section. (Ord. 1253 § 1, 2004)
13.28.140 Authority to sample, establish sampling devices, test and photograph.
During any inspection as provided herein, the director may take any samples, perform any testing deemed necessary and take photographs to aid in the pursuit of the inquiry or to record site activities. (Ord. 1253 § 1, 2004)
13.28.150 Notice of violation.
Whenever the director finds that a person has violated or otherwise failed to meet a requirement of this chapter, the director may order a person to comply with this chapter by either personally serving that person with a written notice or by sending written notice to that person by certified mail. Such notice may require without limitation:
A.
The performance of monitoring, analyses and reporting;
B. The elimination of illicit connections or discharges; C.
That violating discharges, practices or operations shall cease and desist; D.
The abatement or remediation of storm water pollution or contamination hazards and the restoration of any affected property;
E.
Payment of a fine to cover administrative and remediation costs; and/or ATTACHMENT 2
F.
The implementation of source control or treatment BMPs.
If abatement of a violation and/or restoration of affected property is required, the notice shall set forth a deadline by which such remediation or restoration shall be completed. Said notice shall further advise that, if the violator fails to complete the remediation or restoration described in the written notice provided for under Section 13.28.150 within the time provided for therein, the city or a contractor designated by the director shall complete the work specified in the notice, and the city shall charge all expenses related to the city or contractor’s performance of said work to the responsible person as provided for under Section 13.28.180. (Ord. 1253 § 1, 2004)
13.28.160 Appeal.
Notwithstanding the provisions of Section 13.28.190, any person receiving a notice of violation under Section 13.28.150 may appeal the director’s determination to the city manager. The notice of appeal must be received by the city manager within five days from the date of the notice of violation. Hearing on the appeal before the city manager or his or her designee shall take place within fifteen days from the date of city’s receipt of the notice of appeal. The decision of the city manager or designee shall be final. (Ord. 1253 § 1, 2004)
13.28.170 Abatement by city.
If the violation has not been corrected pursuant to the requirements set forth in the notice of violation or, in the event of an appeal under Section 13.28.160, within ten days of the decision of the city manager upholding the decision of the director, then the city or a contractor designated by the director shall enter upon the subject private property and is authorized to take any and all measures necessary to abate the violation and/or restore the property. It is unlawful for any person, owner, agent or person in possession of any premises to refuse to allow the city or designated contractor to enter upon the premises for the purposes set forth above. (Ord. 1253 § 1, 2004)
13.28.180 Charging cost of abatement/liens.
Within thirty days after abatement of the nuisance by city, the director shall notify the property owner of the property of the cost of abatement, including administrative costs. The property owner may file a written protest objecting to the amount of the assessment with the city clerk within fifteen days. The city clerk shall set the matter for public hearing by the city council. The decision of the city council shall be set forth by resolution and shall be final.
If the amount due is not paid within ten days of the decision of the city council or the expiration of the time in which to file an appeal under this section, the charges shall become a special assessment against the property and shall constitute a lien on the property for the amount of the assessment. A copy of the resolution shall be turned over to the county auditor so that the auditor may enter the amounts of the assessment against the parcel as it appears on the current assessment roll, and the tax collector shall include the amount of the assessment on the bill for taxes levied against the parcel of land. (Ord. 1253 § 1, 2004)
13.28.190 Urgency abatement.
The director is authorized to require the immediate abatement of any violation of this chapter that constitutes an immediate threat to the health, safety or well-being of the public. If any such violation is not abated immediately as directed by the director, the city is authorized to enter onto private property and to take any and all measures required to remediate the violation. Any expense related to such remediation undertaken by the city shall be fully reimbursed by the property owner and/or responsible party. Any relief obtained under this section shall not prevent city from seeking other and further relief authorized under this chapter. (Ord. 1253 § 1, 2004)
13.28.200 Violations.
It is unlawful for any person to violate any provision or fail to comply with any of the requirements of this chapter. A violation of or failure to comply with any of the requirements of this chapter shall constitute a misdemeanor and shall be punishable as set forth in California Penal Code Section 19. (Ord. 1253 § 1, 2004) ATTACHMENT 2
13.28.205 Strict liability.
By securing a permit from the city of Manteca for development, encroachment, or the construction of a work improvement the permittee shall be strictly liable, in any criminal proceeding, for allowing or failing to prevent a violation of this chapter by the permittee, its employees, subcontractors or material men.
In any prosecution for a violation of this chapter against a permittee based on the act or omissions of an employee, subcontractor, or material men it shall only be required that it be shown that the permittee was issued a development, encroachment, or construction permit and that a violation of this chapter occurred at the site for which a permit was issued. (Ord. 1293 § I, 2005)
13.28.210 Compensatory action.
In lieu of enforcement proceedings, penalties and remedies authorized by this chapter, the director may impose upon a violator alternative compensatory action, such as storm drain stenciling, attendance at compliance workshops, creek cleanup, etc. (Ord. 1253 § 1, 2004)
13.28.220 Violations deemed a public nuisance.
In addition to the enforcement processes and penalties herein before provided, any condition caused or permitted to exist in violation of any of the provisions of this chapter is a threat to public health, safety and welfare, is declared and deemed a nuisance and may be summarily abated or restored by the city at the violator’s expense, and/or a civil action to abate, enjoin or otherwise compel the cessation of such nuisance may be taken by the city. (Ord. 1253 § 1, 2004)
13.28.230 Acts potentially resulting in violation of Clean Water Act and/or California Porter-Cologne Act.
Any person who violates any provision of this chapter or any provision of any requirement issued pursuant to this chapter, may also be in violation of the Clean Water Act and/or the Porter-Cologne Act and may be subject to the sanctions of those acts, including civil and criminal penalties. Any enforcement action authorized under this chapter shall also include written notice to the violator of such potential liability. (Ord. 1253 § 1, 2004) ATTACHMENT 2
Manteca Municipal Code
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Title 15 BUILDINGS AND CONSTRUCTION
Chapter 15.12 PLUMBING CODE
15.12.010 Adoption.
That certain document, one copy of which is on file in the office of the city clerk of the city of Manteca, being marked and designated as the 2013 California Plumbing Code, California Code of Regulations, Title 24, Part 5, as published by the International Association of Plumbing and Mechanical Officials, as now existing, or hereafter amended, regulating and governing the conditions of all properties, buildings, and structures; by providing the standards for facilities and other physical things and conditions essential to ensure that structures are safe, sanitary, and fit for occupancy and use; and the condemnation of such structures; providing for the issuance of permits and collection of fees therefor; and providing penalties for the violation thereof; and each and all of the regulations, provisions, penalties, conditions, and terms of said 2013 California Plumbing Code on file in office of the city clerk of the city of Manteca is hereby referred to, adopted as the plumbing code of the city of Manteca. (Ord. 1525 § 2, 2013)
15.12.020 Enforcement.
California Code of Regulations, Title 24, Part 5, and all other applicable codes shall be enforced by the building official. The building official may appoint inspectors, plans examiners, technicians, officers and other employees. The building official may deputize such employees of the building department or other employees of the city of Manteca as necessary and these employees shall have the duties and powers as delegated by the building official to carry out the functions of the enforcement agency in accordance with California Code of Regulations, Title 24, Part 2, Section 103. The building official shall have the power to render interpretations of this code and to adopt and enforce rules and regulations supplemental to this code as may be deemed necessary in order to clarify the application of the provisions of this code. Such interpretations, rules, regulations, and policies shall be in conformity with the intent and purpose of this code. The building official may authorize the San Joaquin County health department as the city designated enforcement authority. See Section 15.04.020 for definitions of “building official” and “deputize.” (Ord. 1525 § 2, 2013)
15.12.030 Dangerous and insanitary construction—Nuisance.
A. Any portion of a plumbing system found by the administrative authority to be insanitary as defined in the California Plumbing Code is declared to be a nuisance.
B.
1. Whenever brought to the attention of the department having jurisdiction that any insanitary conditions exist or that any construction or work regulated by this code is dangerous, unsafe, insanitary, a nuisance or a menace to life, health or property or otherwise in violation of this code, the department may request an investigation by the administrative authority who, upon determining such information to be fact, shall order any person, firm or corporation using or maintaining any such condition or responsible for the use of maintenance thereof to discontinue the use or maintenance thereof or to repair, alter, change, remove or demolish same for the proper protection of life, health or property and in the case of any gas piping or gas appliance may order any person, firm or corporation supplying gas to such piping or appliance to discontinue supplying gas thereto until such piping or appliance is made safe to life, health or property.
2. Every such order shall be in writing, addressed to the owner, agent or person responsible for the premises in which such condition exists and shall specify the date or time for compliance with such order.
C.
Refusal, failure or neglect to comply with any such notice or order shall be considered a violation of this code.
D.
When any plumbing system is maintained in violation of this code and in violation of any notice issued pursuant to the provisions of this section or where a nuisance exists in any building or on a lot on which a building is situated, the administrative authority may institute any appropriate action or proceeding in any court of competent jurisdiction to prevent, restrain, correct or abate the violation or nuisance. (Ord. 1525 § 2, 2013) ATTACHMENT 2
15.12.040 Appendix Chapter 1, Section 103.4.1.
Section 103.4.1 Fees is amended to read as follows:
Permit fees for each permit shall be paid as set forth in Resolution No. R2010-149 or by a determination by the Building Official of the estimated reasonable cost of service.
(Ord. 1525 § 2, 2013)
15.12.050 Board of appeals.
Whenever the building official shall disapprove an application or refuse to grant a permit applied for, or when it is claimed that the provisions of the code do not apply or that the true intent and meaning of the code have been misconstrued and wrongly interpreted, the applicant or any person directly and adversely affected thereby, or the authorized agent of either of said parties, may appeal from the decision of the building official to the building board of appeals of the city of Manteca within thirty days from the date of said decision, and the said board of appeals may, after a hearing, affirm, reverse, or modify said decision of the building official.
The building board of appeals shall have no authority relative to the interpretation of the administrative provisions of the California Plumbing Code nor shall the board be empowered to waive any requirements of the California Plumbing Code.
The appeal shall be made in writing and the appellant or his or her representative may appeal in person and may introduce evidence to support his or her claim(s). (Ord. 1525 § 2, 2013)
15.12.060 Appendix Chapter 1, Section 102.4.
Chapter 1, Section 102.4 of the California Plumbing Code is amended to read as follows:
Section 102.4 Violations and Penalties.
A. It is unlawful for any person, firm or corporation to erect, construct, enlarge, alter, repair, move, improve, remove, convert or demolish, equip, use, occupy or maintain any building or structure or cause or permit the same to be done in violation of this code.
Any person who shall violate any of the provisions of the code hereby adopted or fail to comply therewith, or who shall violate or fail to comply with any order made thereunder, or who shall build in violation of any detailed statement of specifications or plans submitted and approved thereunder, or any certificates or permit issued thereunder, and from which no appeal has been taken, or who shall fail to comply with such an order as affirmed or modified by the City Council, Building Board of Appeals or a court of competent jurisdiction, within the time fixed herein, shall severally for each and every violation and noncompliance respectively, be guilty of a misdemeanor, punishable by a fine of not more than $1,000.00 or by imprisonment in the City Jail of the City of Manteca, or the County Jail of the County of San Joaquin for not more than six months or by both such fine and imprisonment. The imposition of one penalty for any violation shall not excuse the violation or permit it to continue, and all such persons shall be required to correct or remedy such violations or defects within a reasonable time, and when not otherwise specified, each ten days that prohibited conditions are maintained shall constitute a separate offense.
B.
The issuance or granting of a permit or approval of plans and specifications shall not be deemed to be a permit for, or an approval of, any violation of any of the provisions of this code, or any applicable provision of state law. No permit presuming to give authority to violate or cancel the provisions of this code shall be valid, except insofar as work or use which it authorizes is lawful.
C.
The issuance of a permit upon plans and specifications shall not prevent the City Building Official from thereafter requiring the correction of errors in the plans and specifications or from preventing construction operations being carried on thereunder when in violation of this code, or any other applicable provision of state law.
(Ord. 1525 § 2, 2013)
ATTACHMENT 2
Appendix C
Sample Documentation
ATTACHMENT 2
ATTACHMENT 2
ATTACHMENT 2
C.2
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