Auto Repair Shops

It is illegal to allow anything other than rain water to be discharged to a storm drain.

Never allow automotive fluids, residual from used parts, or other chemicals used to be transported to a street, gutter, parking lot, or storm drain. If discharged or disposed of improperly, materials such as hydrocarbons, oil and grease, and heavy metals can be harmful to water quality and creek habitats.

Individuals and businesses that improperly handle and dispose of non-stormwater materials down the storm drain are both subject to civil and criminal prosecution.

Cleaning products labeled “nontoxic” and “biodegradable” can still harm wildlife if they enter the storm drain system. These products are prohibited discharges to the storm drain system.

Best Practices: 

  • Perform all work activities inside on non-porous concrete floors.
  • Immediately clean up drips or small spills.
  • Clean up wet or oily spots with rags and absorbent, or a designated mop.
  • Pour mop wash water into an inside drain.
  • Separate hazardous wastes and use secondary containment for storage.
  • Properly contain used solvents for offsite removal.
  • Securely seal drums and containers.
  • Wash equipment on-site within an approved parts washer.
  • Use dry cleanup methods (i.e. broom or vacuum). Avoid hosing down or pressure washing work areas.
  • Protect hazardous materials, recyclables, and discarded parts/materials from rain.

Wastewater Requirements

An approved oil/water separator or sump is required if wash water is discharged to the sewer system. A Wastewater Discharge Permit may be required. Check with your local municipality for specific requirements.

Are You Ready to Respond to a Spill?

  • Have a written plan.
  • Train employees annually on storm water regulations, spill response, personal safety, and hazardous waste handling and disposal.
  • Have spill cleanup materials onsite.
  • Have Safety Data Sheets for all products used.

For an emergency or a spill involving hazardous materials or hazardous waste call 911 or your local Fire Department.

For All Non-Emergency / Non-Hazardous Spills

  • To report a Non-Hazardous spill, or for other useful phone numbers, see Spill Numbers informational reference sheet for your local agency contact information or visit:
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