ECAR Fact Sheet for Oregon
Septic Tanks and Disposal Wells

Regulations
Self-Audit Checklist
Best Management Practices
Contacts
Related ECAR Fact Sheets
Other Relevant Resources

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The following fact sheet was prepared by the ECAR Center staff. Once prepared, each ECAR Center fact sheet undergoes a review process with the applicable state environmental agency(ies). You can check on the status of the review process here. Please read the disclaimer on the status page. While we have tried to present a summary of the essential information on this topic, you should be aware that other items, such as local regulations, may apply to you.

What You Need to Know

Motor vehicle waste disposal wells are floor drains or sinks in service bays that are tied into a shallow disposal system. Most commonly, these shallow disposal systems are septic systems or drywells, but any underground system that receives motor vehicle waste would be considered a motor vehicle waste disposal well. A variety of names are used to describe shallow disposal systems including: cesspools, catch basins, sink holes, underground vaults, or drain tanks, to name a few.

This fact sheet explains the regulations applicable to septic tanks or other forms of disposal wells used at auto recycling facilities for disposal of vehicle fluids or industrial wastewater. These methods of disposal are referred to as "motor vehicle waste disposal wells." They are regulated under federal and state Underground Injection Control (UIC) regulations that protect drinking water supplies.

Regulations

All underground injection control (UIC) systems are required to register with DEQ. In addition to the registration requirement, some UICs need to be permitted. A permit is required if the UIC is not allowed outright by Oregon Administrative Rule (OAR) 340-044. For example, storm water runoff to UICs may be allowed without a permit if the conditions of OAR 340-044-0050 are met. However, most wastewater discharges to UICs require a Underground Injection Control (UIC) Registration/Permits.

Owners and operators of new and existing injection systems are required to register and provide inventory data to the State of Oregon. This will help to determine if the injection system is Rule Authorized. Rule Authorized systems do not require a permit. Sites that do not qualify as Rule Authorized need to either be closed, modified to meet rule requirements, or submit a WPCF permit application to the appropriate regional DEQ office.

Contaminated wastewater, which could include spent parts washer cleaners and other types of industrial wastes, should never be discharged to a septic system. These wastes may well be hazardous.

Links to the Regulations and Forms. Use the following links to view the regulations and permit forms pertaining to septic tanks.

Water Pollution Control Facilities Permit

Federal Rules for Class V Wells

Federal Rules for Motor Vehicle Waste Disposal Wells

Class V Well Pre-Closure Notification Form

Self-Audit Checklist

When an inspector comes to your facility, there are certain things he or she checks to see if you are in compliance with environmental regulations. It makes good sense for you to perform a "self-audit" and catch and correct problems before they result in penalties. Also, there are some compliance incentives associated with self-audits (see Audit Policy Page).

Use the following list to audit your septic tank or underground well.

1. Does your facility discharge vehicle fluids or related industrial wastewater to a septic tank or similar system? Does a permit authorize the discharges? Check all uses of water and steam within the industrial areas of your facility. Determine where wastewater is generated and discharged. You must have a permit or written authorization for all industrial wastewater discharges. Use of a septic tank or similar system is not a viable option.

Best Management Practices (BMPs)

Most regulations tell you what you have to do to be in compliance, but they don't explain how to do it. That's where "best management practices" come into play. BMPs are proven methods that help you to get into compliance and stay there. The following BMPs are recommended for septic tank management.

• Check your sinks and floor drains in the shop to make certain you know where they discharge.
• Cap or plug any floor drains connected to a septic tank.
• Do not put other fluids like oil, solvents, paints or chemicals into a floor drain. This could contaminate your property and expose you to large fines and clean up costs.
• Think about installing an emergency shut-off on the drain pipes to prevent accidental spills from entering the sewer.
• Train employees on the importance of preventing any vehicle fluids or other industrial wastes from entering a septic tank or well.
• Post signs at sinks connected to your septic tank system to remind employees not to discard any wastes into the sink.

Contacts

1. For more information, contact the Oregon Department of Environmental Quality (DEQ) at 503-229-5696 or 800-452-4011 (toll-free in Oregon).
2. To report a spill or leak, contact the Oregon Emergency Response System (OERS) at 800-452-0311.
3. To report an environmental incident or complaint, contact the nearest DEQ Regional Office.

Related ECAR Fact Sheets

1. Floor Drains
2. Stormwater
3. Wastewater

Other Relevant Resources

1. What Should I Know About Motor Vehicle Waste Disposal Wells?
2. OR Vehicle Dismantlers webpage

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