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Download Excel NPDES Self Monitoring Program
City of Roseville, Pleasant Grove, WWTP
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Organization
City of Rosevilleshow partners CVRWQCB
Program website
view
Plan contactAlfred Lawrence
916-746-1902
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| Start date | 06/12/2008 |
| End date | None |
| Objectives | The City of Roseville (Discharger) provides sewerage service for the City of Roseville, portion of southeast Placer County, and South Placer Municipal Utility District. Previously, all wastewater from the entire service area was treated at the existing Dry Creek Wastewater Treatment Plant (formerly the Roseville Regional Wastewater Treatment Plant.) The Discharger is constructing a new treatment facility, the Pleasant Grove Wastewater Treatment Plant, to treat wastewater from the northwestern portion of the service area to accommodate growth. The Dry Creek Wastewater Treatment Plant, which is approximately 7.5 miles southeast of the new Pleasant Grove Plant, will continue to serve the remainder of the service area and is operated under a separate NPDES permit. The wastewater treatment system for the Pleasant Grove Plant includes mechanically cleaned bar racks, aerated grit basins, and secondary treatment using activated sludge oxidation ditches with nitrification-denitrification, and secondary clarification. Tertiary treament is provided by chemical coagulation with alum or organic polymers, using rapid mix flocculation, followed by continuous backwash filtration, disinfection with hypochlorite, dechlorination using sodium bisulfate, and final polishing over a cascade, to increase the dissolved oxygen content. Current design practices, for an oxidation ditch process followed by tertiary treatment, may not include primary clarification. The proposed Pleasant Grove Plant does not include primary clarification. However, the Discharger has set aside space within the facility for primary clarifiers, if primary clarification is shown to be necessary. Under the California Environmental Quality Act (CEQA) process, effluent storage was required as a mitigation measure to reduce the potential of downstream flooding of Pleasant Grove Creek due to effluent discharge from the Pleasant Grove Plant. Three effluent storage basins (approximately 31.5 acres) will provide 100 year flood protection by storing tertiary treated wastewater, which can subsequently be discharged to the receiving stream. An additional emergency storage basin (approximately 10 acres), with clay bottom and concrete sidewalls, will be used in the event of plant upsets to prevent discharge of effluent that does not meet discharge requirements. Wastewater from the emergency storage basin cannot be discharged to the receiving stream, it must be returned to the treatment facility. Together, the four ponds have an approximate storage capacity of 240 acre-feet. Biosolid treatment consists of an aerated waste activated sludge holding tank and centrifuges for dewatering. Biosolids will be disposed at a landfill. Sludge digesters were not included in the design shown in the Report of Waste Discharge. |
| Annual budget | None |
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Basins & sub-basins monitored
- Sacramento River (Sacramento River)
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map
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Sites Monitored
| Name |
Code |
Latitude |
Longitude |
Map |
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Pleasant Grove Creek, 200 ft US from outfall
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RSW-001 |
38.796161 |
-121.381283 |
locate |
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Pleasant Grove Creek, 200 ft DS from outfall
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RSW-002 |
38.795556 |
-121.378328 |
locate |
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Parameters Monitored
| Group | Parameters | Frequency |
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| General Water Quality |
Dissolved Oxygen (DO), Hardness, pH, Specific Conductance [EC @ 25 deg C], Temperature |
Weekly, Monthly |
| Priority Pollutants |
Priority Pollutants |
Other |
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Data Products Available
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