We will have an absolute maximum (or minimum) at provided f(c) is the largest (or smallest) value that the function will ever take on the domain that we are working on. Also, when we say the âdomain we are working onâ this simply means the range of xâs that we have chosen to work with for a given problem.
Thompson's slope is about one percent, so each structure manages a zone of about nine acres. At $500 to $2,000 per structure, the drainage water management structures only added about five to 15 percent to the cost of upgrading the field's century-old drainage system.t $500 to $2,000 per structure, the drainage water management structures only added about five to 15 percent to the cost of upgrading the field's century-old drainage system.
1 Pumping out larger tanks (1,500-2,500 gallons) can cost $200-$350 or more. 2  Installing a high-quality filter to protect your leachfield/drainfield costs about $200-$300, according to officials in Olympia, Washington. Sometimes a failing septic system can be resurrected by properly pumping the tank, cleaning the drainfield lines, installing filters and a process known as fracturing the soil, which involves inserting a hollow tube into the ground and injecting a 300-pound blast of air, at a cost of $1,000-$2,000 or more.