Stormwater Management

Responsible Management

Courtyard with trees With every storm and snowmelt event, thousands of gallons of water enter CSU's storm drains and flow to the Cache La Poudre River and Spring Creek. Pollutants such as pesticides, oil, metals, sediment, and animal waste can be picked up and carried by the water. Stormwater pollution can come from incidental deposits of dust and oil on parking lots which are washed off with rain and snowmelt; but pollution also comes from outdoor washing activities, intentional dumping and accidental spills of chemicals. Environmental regulations are in place to minimize stormwater contamination and address the nature and extent of "nonpoint source" pollution. The regulations are aimed at protecting rivers and lakes from pollutants and sediments that can harm aquatic organisms including insects and fish. Certain species of fish are more sensitive to metal contaminants than humans, for example we can tolerate silver in our drinking water at concentrations of up to 0.1 mg/L, but this concentration in a river can be lethal to fish.

 

It is our job to watch for and reduce the potential for stormwater pollution from CSU's campuses.

What is CSU Doing to Prevent Stormwater Pollution?

CSU has a stormwater permit Adobe Reader Document (PDF), called an "MS4 Program", that describes what measures we must take and what we plan to do to minimize stormwater pollution. It is structured with six "Minimum Measures", each of which has multiple goals and requirements. CSU's MS4 Program document Adobe Reader Document (PDF) and revisions Adobe Reader Document (PDF) are available for review, Adobe Reader Document (PDF)Main South MS4 Map 2019 Adobe Reader Document (PDF)MS4 Map 2019.

In addition, CSU has developed a stormwater quality standard that requires stormwater treatment with each development or redevelopment project on land owned by the University.

We attempt to control stormwater pollution by using a variety of techniques and strategies. The following are a few examples of actions we have taken to minimize stormwater pollution:

Contractor Information

Regulatory Items of Interest

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Discharges of process wastewater or contaminated water are not allowed to go to storm drains. In some cases, a specific discharge permit can be obtained to allow discharge of a process wastewater. However, these permits may require monitoring, reporting and treatment to meet the discharge limits. CSU's stormwater and surface water discharges are regulated by the Colorado Department of Public Health and Environment (CDPHE).

CDPHE has focused on several areas of surface water discharges in the last several years, including fire suppression system discharges, groundwater dewatering during construction and potable water. The following is a brief synopsis of each of these types of discharges:

Fire Suppression System Discharges: In December 2014 CDPHE issued a policy and guidance for these discharges that categorize them as low-risk, which means CDPHE will not require permit coverage or take enforcement action against operators without permit coverage as long as the operator is following the guidance. In a nutshell: you can discharge fire suppression system discharges, such as water from inspector tests, provided there are no added chemicals in the system, and the discharge does not cause erosion or impact receiving waters. Please read the policy and guidance documents before discharging liquids from fire suppression systems, they can be found here:
https://www.colorado.gov/pacific/cdphe/clean-water-commerce-and-industry-compliance-assistance-and-guidance

The slides below illustrate a few of CSU’s fire suppression system discharges and how we handle them.

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Groundwater Dewatering During Construction: If your construction project includes excavation below the groundwater table, and you might be pumping groundwater, you need to have a plan to manage that groundwater. Options include discharge to storm sewers (including gutters, pipes, rivers, etc.), discharge to sanitary sewer, or reinjection. If you wish to discharge to storm sewers, then you will need a permit from CDPHE that is designed to protect the receiving stream. Before you apply for the permit you must check for nearby contaminated sites, for example leaking underground storage tanks, hazardous waste sites, sites undergoing cleanup, etc., and if within a specified distance (for example within ½ mile of a voluntary cleanup site) you must collect a groundwater sample at your site and have it analyzed for certain parameters. Depending on the results, you might have to plan to treat your pumped groundwater before releasing it from your site. Be aware that even if chemicals you detect are naturally occurring (for example selenium), you will be required to meet a limit that might be lower than the concentration you found in the groundwater. CSU’s Main campus is underlain by a groundwater aquifer the top of which is about 15 to 20 feet below ground, so it is important to consider groundwater pumping before all construction projects. For more information visit the CDPHE web-site:
https://www.colorado.gov/pacific/cdphe/wq-construction-general-permits

Potable Water discharges

The State considers the discharge of potable water to be a “low-risk” discharge. The State has acknowledged that although potable water contains a pollutant in the form of chlorine, this pollutant can be removed and dissipates quickly. Further, when the discharge of potable water can cause erosion and transport of sediment, if appropriate management techniques are used this erosion can be minimized. Here is a link to CDPHE’s guidance on potable water discharges: https://www.colorado.gov/pacific/cdphe/clean-water-commerce-and-industry... Scroll to the bottom of the page to find the “Discharge of Potable Water Guidance”. Although chlorine in potable water can be treated or dissipated, this is not necessarily the case for superchlorinated water, potable water that is used to disinfect new water mains and fire lines. CSU typically requires contractors within CSU’s MS4 boundary to collect and dispose of superchlorinated water. All contractors must coordinate discharges of superchlorinated water with personnel in the CSU Facilities Management Utilities Group prior to superchlorinating.

What Can I Do to Prevent Stormwater Pollution?

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Here are a few healthy household habits that you can do to help clean up the water bodies around Fort Collins:

  • Use a commercial carwash or wash your car on a lawn or other unpaved surface to minimize the amount of dirty, soapy water that enters the storm drain.
  • Purchase nontoxic, biodegradable, recycled, and recyclable products whenever possible.
  • Clean up PET WASTE and dispose of it properly (preferably in the toilet)!!
  • If your vehicle is leaking fluids, repair them as soon as possible. If you are repairing your vehicle, do it in an appropriate location and clean up any spills immediately.
  • Dispose of hazardous chemicals and automotive fluids in an appropriate manner. DO NOT dump them in the gutter, down any drains or dispose of them in the garbage.
  • Keep the sidewalks shoveled outside of your house to minimize the need to use de-icing agents Adobe Reader Document (PDF).

Remember, any pollutant you place or see on the ground will eventually end up in our rivers, creeks, and lakes. Keep this in mind next time you go swimming, kayaking, or tubing down the Poudre River!! If you observe someone illegally discharging wastes around CSU please report the incident to CSU Facilities Dispatch at 970-491-0077.