Shallow Disposal Fields

Shallow Disposal Fields. Shallow aggregate systems can sometimes be used where the depth to the restrictive horizon or water table is less than 25 inches. Placement of the system may be as shallow as 12 inches for aggregate systems. [See Figure 7 and Rule 5.4.5(14) and (15) of this design standard.] Shallow installations may be placed in any texture shown as suitable in Table 2.