§ 171.144 EXCAVATION.
   (A)   Minimum requirements. Excavation for system components shall be as established by this section.
   (B)   System components. Excavations for septic tanks, pretreatment components, lift stations, sewer lines, header lines, pressure supply lines, and system components other than soil treatment components shall be as follows:
      (1)   Appropriate elevations or overcut. Excavations shall be made to the appropriate elevation or overcut only to accommodate bedding material.
      (2)   Grading. Excavations shall be level or uniformly graded as appropriate so that tanks, containers, and piping is supported and secure.
      (3)   Slope. Excavations for piping shall be uniformly sloped so that wastewater does not pond in bowed areas.
   (C)   Soil treatment component excavation. Excavation for soil treatment components shall be as follows:
      (1)   Site contour. Excavation shall be uniform along the site contour, not exceeding the depth specified on the approved site plan.
      (2)   Bottom surface. The trench or bed shall be excavated with a level bottom surface.
      (3)   Compaction and/or smearing protection. Excavation shall be done so as to preserve the infiltrative trench or bed bottom and sidewalls from compaction and/or smearing. Foot traffic on trench excavations shall be kept to a minimum.
(Ord. [Bd of Health Ord., Art. V], passed 11-12-1996; Ord. [Bd of Health Ord., Art. V], passed 11-12-2013)