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Janice Kaspersen Janice Kaspersen Stormwater Editor

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SW Editor's Blog

April 7th, 2009 6:55am PST

Mobile Car Wash Runoff

Posted By Janice Kaspersen 3 Comments

The city of Oxnard, California, has joined a growing number of municipalities that are cracking down on mobile car wash operations. Under rules approved two weeks ago, mobile car washers will soon be required to capture all runoff and recycle it or dispose of it at an approved facility. Failing to do so could cost them up to $10,000 a day in fines.

While some owners of these small businesses, as well as others in the community, are protesting the rules, the city is focusing more on nonpoint-source pollutants—not only, or even primarily, the detergents or cleaning agents used, but also the oil, grease, brake dust, and other chemicals washed off the vehicles.

Commercial car washes have long had to recycle or treat their water, and the city says the new rules simply require mobile operators to do the same. Mats and vacuum systems can be used to collect and transport the wash water. One Oxnard councilman estimates that obtaining the necessary equipment will cost each operator about $1,000 up front.

Many cities have also focused on fundraising car washes—the kind the high school band or ski team used to hold on weekends on a vacant lot—requiring them to either capture the water or arrange to hold the events at a commercial car wash facility that can handle the runoff. Although it’s often been unpopular to target these commonly used fundraisers, public education—and the well-publicized availability of alternatives, such as a car wash kit that the groups can use—have made the rules more palatable.

How big a role should public education play in the regulation of mobile car wash operations? The people who are paying for the convenience of having the car wash come to them, rather than the other way around, might be willing to pay a bit more to ensure that the runoff is safely disposed of, and it seems the operators could convey that message as they pass along their higher costs. The cities imposing new rules could do a lot to help, too, by making getting the word out not just on the rules, but the reasons behind them.

           

What Do You Think?

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cparker

April 8th, 2009 11:38 AM PT

Simultaneously, the public and businesses need to also be educated about how the wastewater generated by pressure washing parking structures/lots, gas stations, shopping centers, refineries, shipyards, airports, even condominium projects should be managed. Outdoor surfaces need to be cleaned for cosmetic and liability concerns, as well as to keep contaminates from entering our storm drains. Pressure washers are very cost effective, efficient tools and can actually help reduce water pollution if the wastewater is managed properly. One quart of used motor oil contaminates 250,000 gallons of fresh water. The wastewater generated by removing oil, grease, gum, paints, dirt, etc. from high traffic areas contains much higher concentrations of contaminates than wastewater generated by washing the exterior of vehicles. Most pressure washing activities take place nights and weekends when inspectors are not on duty and when businesses are slow or shut down. Predominately, the service provider who offers the lowest price for their service is the main consideration for most persons responsible for procurement of these types of services. Alot of companies use their own employees and pressure washing equipment, because it is less expensive than hiring a service provider. The problem is that persons responsible for hiring pressure washing services have not been educated about incorporating the use of vacuum recovery and wastewater recycling equipment. Environmental compliant pressure washers are failing at an alarming rate. It is simply less expensive not to invest in the equipment and labor required to vacuum, recycle, clean and properly dispose their wastewater. Consequently, most pressure washers continue to discharge their wastewater to the storm drains. The cost of this source of water polutiion is staggering. 80% of pollution in our marine environment comes from pollutants washing off of outdoor surfaces into the storm drains. 32% of the pollution in our waters is from used motor oil, transmission fluid and antifreeze, 12%from silt, dirt and mud, 9% paint an wood stain. According to the U.S. Environmental Portection Agency and Department of Energy estimates, 4 million watt hours of ppower and 5,360 pounds of carbon dioxide are consumed along with every million gallons of fresh water used. The level of oil, grease, trace metals in the wastewater vary, depending on how often the surface is cleaned, how much water is used and the concentrations of the contaminates removed. History has shown that preventing water pollution at the source is more cost effective than cleaning up after the damage has beeen done or sending a complex matrix of wastestreams to the local POTW's to be treated. One quart of used motor oil contaminates 250,000 gallons of fresh water. If there are just ten pressure washers in hour city, dumping only 1 quart of used motor oil to the storm drain each day, 2.5 million gallons of fresh water is being polluted, every day. Some pressure washers vacuum up their wastewater and discharge to a sewer outlet without removing the contaminates or adjusting the pH. Some untreated wastewater discharges to the sewer can corrode pipes. Also, solids, grease, coatings or paints can build up and create blockages, which lead to overflows into businesses and expensive plumbing bills. Assessing, planning and implementing a formable process which educates and supports BAT's and BMP's that will support Outdoor Green Cleaning will guarantee the long term sustainability of our waterways, the blood lines of our Earth.

elginsweeper

April 8th, 2009 8:48 AM PT

Two of the 6 points for stormwater resolution are increasing public awareness and involving the public. It would seem that requiring the "public" to meet the same criteria for car washing as commercial operations would satisfy those requirements.

mi ms4

April 8th, 2009 10:48 AM PT

Back in the 1990s the Michigan Department of Environmental Quality held a power washer "shoot out," to help identify methods that would prevent wash water discharges to storm sewers from portable operations. The big lesson learned was that the inlet needed to remain visible (i.e., not hidden under a mat, water filled pillow, or other covering). Because of cracks in pavement and drain inlet housings, no inlet cover or plug can guarantee a good enough seal to prevent discharges. And when covers are used, it is impossible to tell if discharges are occurring. Therefore, it's necessary to locate washing activities as far as possible from the drain in order to minimize the amount of water that can make it to the drain. And then place controls (portable dikes, vacuums, or other barriers) well away from the inlet. That way, if the barrier fails, there is time to react and head off the discharge before it reaches the inlet.

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