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Auto Shops, Carwashes, Stonecutters


To better control and prevent petroleum, oil, grease, sand, and other solids from entering the collection system, facilities may need to install a sand/oil interceptor (SOI) prior to discharge into the sanitary sewer. Automobile maintenance and repair shops, car washes, commercial parking garages, stone cutters and other businesses have the potential to introduce these contaminants into the sanitary sewer. Prior to building construction or remodeling, construction drawings including plumbing and details of the sand/oil interceptor shall be submitted to their appropriate sanitation district agency. Your sanitation district can be found here by typing in your address.

Plans submitted to either the City of Littleton or the City of Englewood will be reviewed by South Platte Renew for compliance with the Petroleum Oil, Grease, and Sand Policy¹. Plans submitted to other cities or counties will be reviewed by the appropriate sanitation district agency for compliance with their rules and regulations.

Best management practices to manage petroleum oil, grease, and sand include installing drain screens; storing and managing chemicals and chemical waste properly; and sweeping or dry wiping floors prior to wash down. Employees must be trained to employ these best practices. Once trained, every employee should complete an Employee Training Form (you may download our forms for your convenience in either English² or Spanish³) and sink signs should be hung as reminders. Along with best practices to manage your wastewater, remember to use a state certified waste hauler to properly pump and maintain your sand/oil interceptor.

If you have any questions or concerns or would like to discuss this further, please contact the Industrial Pretreatment Department at or reach out to any department member from the following page: Contact us


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Interactive Service Map

Use this search function to determine the Sewer District, Water District and Storm Drainage District for your address. It will also provide additional information on the service provider, billing provider and contact information.

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Community Events

South Platte Renew hosts several major community events annually, where community members are invited to visit our facility and learn about the water renewal process. We also partner with the Cities of Englewood and Littleton at their events to educate the community on the water renewal process.

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Water Renewal Process

At South Platte Renew we use a biological treatment process that harnesses the natural power of native bacteria to sustainably clean and renew water using the least amount of chemicals and energy.

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