The proper disposal method for commercial hazardous waste is based upon the volume of hazardous waste generated per month.

Less than 100 kilograms (200 pounds or 27 gallons) per month

A Very Small Quantity Generator (VSQG) is any business that generates less than 100 kilograms (200 pounds or 27 gallons) of hazardous waste per month, and may use the county's appointment-based disposal system to discard of hazardous substances. Charges for disposal start from $1.25 per gallon for most waste types. For more information, call San Mateo County at 650-372-6200.

More than 100 kilograms (200 pounds or 27 gallons) per month

Look for a hazardous waste hauler in the yellow pages or visit the San Mateo County Department of Environmental Health's website for a list of companies that provide this service.