|
Download Excel NPDES Self Monitoring Program
City of Grass Valley, WWTP
|
Organization
City of Grass Valleyshow partners CVRWQCB
Program website
view
Plan contactNorm Benton
530-477-4626
|
| Start date | 06/12/2009 |
| End date | None |
| Objectives | The City of Grass Valley (Discharger) provides sewerage service for the City of Grass Valley and serves a population of approximately 12,100. In addition, the Grass Valley WWTP has been treating water that has been surfacing from an abandoned mine portal located on City property. The WWTP design average
dry weather flow capacity is 2.78 mgd. The treatment system at this facility consists of bar screening; primary sedimentation; alkalinity adjustment; biological treatment by activated sludge, including nitrification and denitrification; secondary sedimentation; filtration; disinfection; and dechlorination. The outfall is equipped with a stream-side rock pile diffuser. Sludge is treated by an anaerobic digester
and dewatered using a belt filter press. Treated municipal and industrial wastewater is discharged to Wolf Creek. Currently under Cease and Desist Order No. R5-2007-0163. |
| Annual budget | None |
|
Basins & sub-basins monitored
- Sacramento River (Sacramento River)
|
|
|
|
|
map
|
Sites Monitored
| Name |
Code |
Latitude |
Longitude |
Map |
|
Wolf Creek, 500 ft US of the outfall, on the E bank
|
RSW-001 |
39.205926 |
-121.069662 |
locate |
|
Wolf Creek, 1000 ft DS of the outfall, on the W bank
|
RSW-002 |
39.203979 |
-121.069779 |
locate |
|
Parameters Monitored
| Group | Parameters | Frequency |
|---|
| General Water Quality |
Dissolved Oxygen (DO), Hardness, pH, Specific Conductance [EC @ 25 deg C], Temperature, Turbidity |
Weekly, Monthly |
| Pathogens & Bacteria |
Fecal Coliforms |
Quarterly |
| Priority Pollutants |
Priority Pollutants |
Other |
| Radioactivity |
Radionuclides |
Annual |
| Water Toxicity |
Toxicity (chronic) - Ceriodaphnia, Toxicity (chronic) - Fathead minnow, Toxicity (chronic) - other |
Quarterly |
|
Data Products Available
|