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Download Excel NPDES Self Monitoring Program
City of Modesto Storm Water Discharge from Municipal Separate Storm Sewer System
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Organization
City of Modestoshow partners CVRWQCB
Program website
view
Plan contactJohn C. Riviera
209-577-6381
[email protected]
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| Start date | 06/12/2008 |
| End date | None |
| Objectives | The City of Modesto is located in Stanislaus County at the confluence of Dry Creek and the Tuolumne River (tributaries of the San Joaquin River). The city encompasses 36 square miles with an average elevation of 91 feet above sea level. The average annual precipitation is approximately 12.2 inches. The storm drain system has approximately 77 ,miles of storm drain lines and 20 pump stations within the City. Storm water discharges from the City drain to detention/retention basins (13 detention and 11 retention basins in the City), approximately 18 major outfalls to receiving waters (Tuolumne River or Dry Creek), approximately 18 major outfalls to receiving waters (Tuolumne River or Dry Creek), Modesto Irrigation District (MID) laterals/drains, or rock wells (approximately 11,000). Surface water discharges occur generally in the older areas of the City of those areas immediately adjacent to the Tuolumne River, Dry Creek or irrigation canals. Forty percent of storm water discharges to detention/retention basins, twenty percent to receiving waters (Tuolumne River or Dry Creek), ten percent direct to MID laterals/drains, and thirty percent to rock wells. |
| Annual budget | None |
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Basins & sub-basins monitored
- San Joaquin River (Eastside)
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map
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Sites Monitored
| Name |
Code |
Latitude |
Longitude |
Map |
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Bodem Street runoff near MID Lateral No. 4
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Bodem |
37.644842 |
-120.987381 |
locate |
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Dry Creek, Downstream
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DryCreek |
37.634739 |
-120.985228 |
locate |
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Dry Creek, Upstream
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Drycreeku |
37.658844 |
-120.923222 |
locate |
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Northpointe Basin near Palendale Avenue
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NPointe |
37.699861 |
-121.0239 |
locate |
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Orchard Park Basin near Briggsmore Avenue
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Orchard |
37.6766 |
-120.953722 |
locate |
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Scenic Drive Urban Runoff near Dry Creek
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Scenic |
37.652744 |
-120.954047 |
locate |
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Tuolumne River, Downstream
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Tuolumne |
37.608844 |
-121.030719 |
locate |
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Tuolumne River, Upstream
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TuolumneD |
37.617786 |
-120.939167 |
locate |
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Parameters Monitored
| Group | Parameters | Frequency |
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| Bulk Organics |
Oil & Grease |
Other |
| General Sediment Quality |
Volatile Suspended Solids (VSS) |
Other |
| General Water Quality |
Alkalinity, Dissolved Oxygen (DO), Electrical Conductivity (EC) , Hardness, pH, Specific Conductance [EC @ 25 deg C], Temperature, Total Dissolved Solids (TDS), Total Suspended Solids (TSS), Turbidity |
Other, Storms only |
| Major Ions & Minerals |
Chloride, Cyanide, Fluoride |
Other |
| Mercury |
Mercury, Methylmercury |
Other |
| Metals & Trace Elements |
Aluminum, Antimony, Beryllium, Cadmium, Copper, Iron, Lead, Thallium, Zinc |
Other |
| Nutrients |
Biological Oxygen Demand (BOD), Chemical Oxygen Demand (COD), Nitrate + Nitrite as N NO3-N + NO2-N, Nitrate NO3, Nitrite NO2, Phosphorus, Total Ammonia as Nitrogen NH3-N, Total Kjeldahl Nitrogen (TKN) |
Other, Storms only |
| Organic Carbon (OC) |
Total Organic Carbon (TOC) |
Other |
| Organic Contaminants |
Acid extractable - other, Base-neutral extractable - other, Bis(2-ethylhexyl)phthalate, Foaming Agents (MBAS), Organic Contaminants - other, PAHs - other, PCB-1016 (Aroclor 1016), PCB-1221 (Aroclor 1221), PCB-1232 (Aroclor 1232), PCB-1242 (Aroclor 1242), PCB-1248 (Aroclor 1248), PCB-1260 (Aroclor 1260) |
Other, Not Recorded |
| Pathogens & Bacteria |
E. coli, Fecal Coliforms, Total Coliforms |
Other |
| Pesticides |
Organochlorine Pesticides, Organophosphates, Pesticides - other |
Other |
| Sediment Chemistry |
Arsenic, Chromium, Copper, Lead, Mercury, Nickel, Pyrethroids, Sediment Chemistry - other, Sediment Organic Contaminants - other , Selenium, Silver, Zinc |
Other |
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Data Products Available
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