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Regulations BACK to VIRTUAL TOUR 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 Various methods are used to clean oil and grease from auto parts before sale. This fact sheet covers the environmental issues associated with aqueous cleaning methods such as enclosed spray washers, hot dip tanks, pressure washers, and steam cleaning. Solvent Cleaning (e.g., Stoddard solution, mineral spirits) is covered under a separate fact sheet. Aqueous cleaners are water-based solutions that, unlike petroleum-based solvents, are typically nonflammable and contain little or no volatile organic compounds (VOCs). Instead of dissolving grease and solids, they rely on heat, agitation, and soap action to break soils into smaller particles. Aqueous cleaners can be used in enclosed spray washers, hot dip tanks, pressure washers, and steam cleaning. With aqueous cleaning processes there are two major environmental concerns:
Management and disposal options for these two wastes are discussed below, as well as used filters. Oil, Sludge, Sediment. Oil skimmed from an aqueous cleaning solution can be managed as used oil and recycled. Most recyclers will accept skimmed oil with used motor oil as long as it is not contaminated with solvent. Contaminated oil and other solids that are removed from aqueous cleaning operations should be managed as hazardous waste unless you have performed tests that indicate they are non-hazardous. For more information, see the ECAR Hazardous Waste fact sheet. If the wastes are non-hazardous, then you should maintain test records that support your determination. Wastewater. Nonhazardous spent aqueous cleaning solutions can be discharged to your local sewer system or treatment plant if they meet local discharge limits and with the appropriate permits. The sewer authority/treatment plant may require you to treat your cleaning solution before discharging to the sewer. And you will likely need a State Pretreatment Permit. Contact your local sewer authority and to find out their requirements. Waste aqueous cleaners must never be poured down the drain if your shop has an on-site septic tank system. Discharging aqueous cleaners to a septic tank system is NOT allowed at any time. Septic tank systems, wells, leach fields, cesspools, and similar disposal sites are regulated by federal and state rules designed to prevent contamination of underground drinking water supplies. If your hot-soap parts washer has an evaporator, the fluid must be tested before it can be evaporated. It can be evaporated if it is not hazardous. Links to the Regulations. Use the following links to view the regulations pertaining to aqueous cleaning. Information Form for NPDES Permits Mississippi Wastewater Permit Regulations, NPDES Regulations, and UIC Permits (Regulation WPC-1) 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 aqueous cleaning operation.
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 aqueous cleaning.
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