|
Download Excel NPDES Self Monitoring Program
City of Modesto Water Quality Control Facility
|
Organization
City of Modestoshow partners CVRWQCB
Program website
view
Plan contactGary DeJesus
209-577-6300
|
| Start date | 04/25/2008 |
| End date | None |
| Objectives | The Discharger owns and operates The Facility that consists of separate primary and secondary treatment plants. The primary treatment plant, located at 1221 Sutter Avenue in the City of Modesto, provides pumping, screening, grit removal, flow measurement, primary clarification, and sludge digestion. The clarified effluent from the primary treatment plant is then transported approximately 6.5 miles southwest to the secondary treatment plant. At the secondary treatment plant, located at 7007 Jennings Road in the City of Modesto, approximately half of the primary plant effluent is treated in fixed film reactors (FFRs). The remaining primary effluent is discharge to an aerated recirculation channel, where it is combined with the effluent from FFR. Flow in the aerated recirculation channel is then distributed to three parallel facultative ponds for further treatment, and its effluent is transferred to one of two storage ponds until it can be discharged to the San Joaquin River, or applied to the Dischargers 2526 acre ranch. From October 1 through May 31, disinfected secondary-level effluent may be discharged from Discharge Point 001 to the San Joaquin River, a water of the United States. The Discharger is proposing to construct a new advance treatment system, in two phases capable of discharging up to 4.8 mgd of Title 22 tertiary (or equivalent) treated wastewater year round from the Discharge Point 001. Phase 1A will consist of athe addition of 2.3 mgd of Title 22 tertiary (or equivalent) treated wastewater, and is expected to be completed by 2009. Phase 1B will add an additional 2.5 mgd and is expected to be completed by 2011. |
| Annual budget | None |
|
Basins & sub-basins monitored
- San Joaquin River (Lower San Joaquin River)
|
|
|
|
|
map
|
Sites Monitored
| Name |
Code |
Latitude |
Longitude |
Map |
|
San Joaquin River, US at West Main Bridge
|
RSW-001 |
37.493888 |
-121.080555 |
locate |
|
San Joaquin River, 500 ft DS from discharge point
|
RSW-002 |
37.562336 |
-121.152769 |
locate |
|
San Joaquin River, 1 mile DS from discharge point into
|
RSW-003 |
37.568529 |
-121.154546 |
locate |
|
San Joaquin River, DS at Laird Park
|
RSW-004 |
37.561944 |
-121.152222 |
locate |
|
Parameters Monitored
| Group | Parameters | Frequency |
|---|
| Disinfection Byproducts |
Trihalomethanes |
Monthly |
| General Water Quality |
Alkalinity, Dissolved Oxygen (DO), Hardness, pH, Specific Conductance [EC @ 25 deg C], Temperature, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Turbidity |
Annual, Weekly, Monthly |
| Hydrology |
Flow |
Daily |
| Major Ions & Minerals |
Boron, Calcium, Chloride, Magnesium, Major Ions & Minerals - other, Potassium, Sodium |
Annual |
| Mercury |
Mercury, Methylmercury |
Quarterly |
| Metals & Trace Elements |
Aluminum , Copper , Iron , Manganese , Molybdenum , Selenium |
Monthly, Annual |
| Nutrients |
Ammonia as Nitrogen NH3-N, Biological Oxygen Demand (BOD) @ 20 deg C, Nitrate NO3, Phosphorus |
Monthly, Quarterly, Annual |
| Pathogens & Bacteria |
Fecal Coliforms |
Monthly |
| Priority Pollutants |
Priority Pollutants |
Annual |
|
Data Products Available
|