ON-SITE, IN-POSITION/AS-PARKED FLEET VEHICLE WASHING IS LEGAL WHEN PERFORMED CORRECTLY BY A QUALIFIED CONTRACTOR
The facility operator is typically required to address storm water runoff from vehicle maintenance (including washing) areas at these facilities. Please note that there is a difference between the actual wash water which has required a waste water NPDES permit since 1972, and the storm water runoff from the areas where the vehicle washing occurs which has required a storm water NPDES permit since October 1992.
It is our understanding you are primarily concerned with the vehicle wash water generated during on-site car and truck washing by contract mobile pressure washers. There are alternatives to obtaining a NPDES permit, and several of these options offer opportunities for pollution prevention, rather reaction.
Since an NPDES permit is only required for a point source discharge of pollutants, several scenarios where a permit would not be required include:
In most cases, it is the responsibility of the operator of the facility where the discharge occurs to obtain a permit for discharges from that site.
A waste water permit would only be required if:
The party taking waste water off-site, and not the facility operator, would be responsible for proper disposal of the wash waters removed from the site. Disposal into a sanitary sewer would require permission from the local city or waste water authority and compliance with any applicable industrial pretreatment requirements. Illegal dumping of wastewater could result in fines from the local municipality, the State, and/or the Environmental Protection Agency.
Any facility with “storm water associated with industrial activity” would still need to obtain a storm water permit for the areas where any vehicle maintenance, including washing, fueling, or mechanical repair, occurs. However, this would be the case regardless of the vehicle wash method used, unless the all storm water from these areas was also captured and prevented from discharging.
Those with stationary car and truck washes have had to have pollution control equipment for compliance with NPDES permits or a municipality’s pretreatment program for years. It is only fair that mobile systems not receive a competitive advantage over the stationary car and truck washes by avoiding environmental laws.
We hope this information aids you in understanding the various means a vehicle washing contractor may use to comply with the Clean Water Act. EPA certainly does not intend to stand in the way of innovation in the private sector and actively supports efforts to incorporate pollution prevention in compliance efforts.