Best Management Practices (BMPs)for businesses

Businesses have a unique presence in our community. They provide needed goods and services. They also have special concerns and responsibilities when it comes to keeping our water clean.

It’s important for businesses to ensure the activities occurring at their sites do not cause stormwater pollution. This requires preparing and enacting a stormwater pollution prevention plan, conducting periodic site inspections, and making sure all staff know the plan. Avoiding stormwater pollution takes effort, but it also helps avoid stormwater violations and, more importantly, communicates a commitment to the community and to the island.

WHO SHOULD USE THIS BROCHURE?

Business Owners

On-Site Managers

Vehicle Maintenance Staff

Truck Drivers

Staff Who Work Outside

STORMWATER PLANDepending on the operations that take place at your facility, you may be required to apply for a stormwater permit which will require you to prepare a stormwater pollution plan for your facility and operations. Regardless of whether or not you are required to develop a plan, each business/property owner should consider the following:

• Activities conducted at your site that may contribute to storm water pollution. A stormwater plan should include proper practices that ensure both safety and prevent storm water pollution.

• Chemicals and materials stored at your location that may represent a pollution risk. A stormwater plan should include best management practices that minimize the risk of a discharge of any polluted water from your facility to a storm drain or waterway.

• Stormwater drainage patterns including downspouts, pipe outlets, and storm drain locations. A detailed map should be developed including the locations where storm water runoff is expected to leave your site.

• Maintenance of any storm water features such as on-site drains, drainage swales, dry-wells, or other permanent stormwater treatment features.

• Regular employee training should be held to ensure that employees know how to conduct their work in a manner that does not cause stormwater pollution and what to do if there is a spill.

For more information about ways to help keep our oceans clean, please visit

stormwatermaui.com

State of Hawaii

Department of Transportation

Highways Division

Maui District

650 Palapala Drive

Kahului, Maui, Hawaii 96732

Phone: (808) 873-3535

Best Management Practices (BMPs)For Businesses

GOOD HOUSEKEEPING

• Protect storm drains on your site to ensure that only stormwater is entering the drains. Also, be aware of the location of any other nearby storm drains, streams, or the ocean and ensure that no pollutants are leaving your site and entering those drains or any water body.

• Designate a contained area for vehicle washing, vehicle refueling, and routine equipment maintenance. The designated area should be located well away from streams or storm drain inlets, and have adequate containment.

• Clean up grass clippings and yard trimmings. Using mulch in planting areas is a good thing, but ensure that green waste is not left where it can be blown or washed away.

• Place covered trash cans and recycling receptacles around the facility to minimize litter.

MATERIALS AND WASTE HANDLING

• Whenever possible, keep chemicals and materials under cover.

• Clearly label onsite chemicals, including hazardous materials.

• Ensure all hazardous chemicals and materials are stored in appropriate storage lockers designed for hazardous or flammable materials.

• Dispose of all waste properly, including solvents, water-based paints, vehicle fluids, wood, and green waste. Materials and debris that cannot be recycled must be taken to an appropriate landfill or disposed of as hazardous waste.

Other permits and considerations for businesses:

If your facility has a physical drain connection to a County or State drainage system, you may need a connection permit.

If you engage in certain industrial activities on your site, you may need an NPDES industrial permit. Consult with the State of Hawaii Department of Health Clean Water Branch for details.

NEVER sweep or blow leaves or

debris into storm drains.

• Cover and maintain dumpsters. Keep dumpster lids closed and, if possible, under cover, so that rainwater does not enter the dumpster. Check frequently for leaks. A plastic liner is recom mended to prevent leakage of liquids. If hosing out a dumpster is necessary, ensure there is adequate containment and that none of the wash water is dicharged to a storm drain or water body.

• Use drip pans under parked equipment and fleet vehicles.

• Dry sweep paved surfaces that drain to storm drains, creeks, or channels. If pavement flushing is necessary, use silt ponds or other techniques to trap sediment and other pollutants. NEVER sweep or blow leaves or debris into storm drains.

• Clean up leaks, drips and other spills immediately so they do not contaminate soil or groundwater or leave residue on paved surfaces. Have a spill kit ready and use dry cleanup methods whenever possible. Ensure that absorbent materials are disposed of properly. If you must use water, use just enough to clean the spill without runoff.