Septage generated by domestic customers could include wastes from an auto body shop operated at a residential location or other small business operations. Such business operations may generate septage containing greater amounts of heavy metals and other potentially harmful substances. The Certification requires that prior to land application, the septage be stabilized to reduce the pathogen content by adding 50 pounds of dehydrated lime to every 1,000 gallons of septage pumped. Fowler will put lime into the truck after septage has been pumped and mixing will occur in the truck during transport to the land application site. Fowler pumps sewage into a 2,500 gallon truck.
Sewage is spread on the fields directly from the truck by means of a spreader bar.
The fields have a slope of less than five percent with the exception of certain portions of Field 60H where the slope exceeds five percent. The Certification requires that septage spread on areas where the slope exceeds five percent be injected or incorporated within 48 hours of spreading. Nineteen soil borings to a depth of three feet were made on the fields. Soil borings revealed that there is no bedrock within 36 inches of the surface. Two of the borings from Field 60F showed mottling above 36 inches.