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• • . S E. SEPTIC TANK DISPOSAL SYSTEM Each septic tank disposal system shall consist of the following components: (1) septic tank, (2) diversion box, and (3) disposal field. It may also include either or both of the following components: (1) dosing chamber, and (2) filter. No portion of the septic tank disposal system shall be located within 10 feet of a foundation, 10 feet of a property line, 10 feet of a swimming pool, or 100 feet of a water well, except that a septic tank may be located within 5 feet of a foundation. 1.- Septic Tank: The septic tank shall be constructed of concrete • or masonry units. Tanks shall have smooth finished walls and bottom at least 4 inches thick. When concrete blocks, other than approved interlocking blocks or precast masonry.units are used, they shall be waterproofed, laid with cement mortar, and • shall be reinforced with half-inch steel bars vertical and horizontal on two-foot centers. All hollow units shall be poured solid with cement mortar. • The septic tank shall have a minimum water capacity of 1,500 gallons measured at flowline and shall be constructed with two compartments. The capacity of the second compartment shall be one-half of the capacity of the first compartment. The general configuration of the tank shall be as shown in Figure 1. Dimensions for tank capacities not shown or deviations from, . •• the dimensions shown must be approved by the Health Officer. The septic tank, and outlet and inlet connections, shall be watertight. The septic tank top may be of two layers of two-inch redwood board covered with building.paper and at least 6-inches of dirt .to form a water--and.odor seal. Concrete tanks with poured concrete covers need not be covered with a dirt seal. Each poured concrete cover • shall have tkro manholes, one over the inlet and one over the out- let, each at least 22 inches in diameter, and with tight fitting • lids. These lids shall be provided with iron U-bolts, or reinforcing rod handholds, to facilitate lifting. Inlet.and outlet baffles may be. of one-inch redwood board mortared into side wall notches. Vitrified clay septic tank tees or vitrified clay septic tank ells cast in place may be substituted for these inlet and outlet baffles. See Figure 1.