H 301.1 - General.
. . .
(3)
No excavation for a leach line or leach bed shall be located within 5 feet (1,524 mm) of groundwater nor to a depth where sewage may contaminate the underground water stratum.
EXCEPTION: When approved by the Authority Having Jurisdiction, this distance may be reduced to 5 feet (1.5 m) from ocean water. The applicant shall supply evidence of groundwater depth to the satisfaction of the Authority Having Jurisdiction.
(4)
The minimum effective absorption area in any seepage pit shall be calculated as the excavated sidewall area below the inlet exclusive of any hardpan, rock, clay, or other impervious formations. The minimum required area of porous formation shall be provided in one or more seepage pits. No excavation shall extend within 10 feet (3048 mm) of groundwater nor to a depth where sewage may contaminate underground water stratum.
EXCEPTION: When approved by the Authority Having Jurisdiction, this distance may be reduced to 5 feet (1.5 m) from ocean water.
. . .
(Ord. 2016-0055 § 13, 2016; Ord. 2013-0050 § 15, 2013.)
H 401.3 Absorption Rates.
Where a percolation test is required, the proposed system shall have the capability to absorb a quantity of clear water in a 24-hour period equal to at least five times the liquid capacity of the proposed septic tank. No private disposal system shall be permitted to serve a building if that test shows the absorption capacity of the soil is less than 0.83 gallons per square foot (gal/ft ) (33.8 L/m ) or more than 5.12 gal/ft (208.6 L/m ) of leaching area per 24 hours. Where the percolation test shows an absorption rate greater than 5.12 gal/ft (208.6 L/m ) per 24 hours, a private disposal system may be permitted where the site does not overlie groundwaters protected for drinking water supplies, a minimum thickness of 2 feet (610 mm) of the native soil below the entire proposed system is replaced by loamy sand, and the system design is based on percolation tests made in the loamy sand.
(Ord. 2016-0055 § 14, 2016: Ord. 2013-0050 § 16, 2013.)
H 601.5 Distribution Boxes.
Where two or more drain lines are installed, an approved distribution box of sufficient size to receive lateral lines shall be installed at the head of each disposal field. The inverts of outlets shall be level, and the invert of the inlet shall be not less than 1 inch (25.4 mm) above the outlets. Distribution boxes shall be designed to ensure equal flow and shall be installed on a level concrete slab in natural or compacted soil. Distribution boxes shall be coated on the inside with a bituminous coating or other approved method acceptable to the Authority Having Jurisdiction.
(Ord. 2016-0055 § 15, 2016: Ord. 2013-0050 § 17, 2013.)
H 601.8 Dosing Tanks.
Automatic syphon or dosing tanks shall be installed when required or as permitted by the Authority Having Jurisdiction.
(Ord. 2016-0055 § 16, 2016; Ord. 2013-0050 § 18, 2013.)
H 701.2 Multiple Installations.
Multiple seepage pit installations shall be served through an approved distribution box or be connected in series. When connected in series, the effluent shall leave each pit through an approved vented leg fitting extending not less than 12 inches (305 mm) downward into such existing pit and having its outlet flow line at least 6 inches below the inlet. All pipe between pits shall be laid with approved watertight joints.
(Ord. 2016-0055 § 17, 2016: Ord. 2013-0050 § 19, 2013.)
H 1001.1 Inspection.
Inspection requirements shall comply with the following:
(1)
Applicable provisions of Section 104.0 of this Code and this Appendix shall be required. Plans shall be required in accordance with Section 102.1 of this Code.
. . .
(5)
Disposal fields and seepage pits shall not be installed in uncompacted fill.
(Ord. 2016-0055 § 18, 2016; Ord. 2013-0050 § 20, 2013.)
H 1101.6 Excavation.
No excavation for an abandoned sewer or sewage facility shall be left unattended at any time unless the permittee shall have first provided a suitable and adequate barricade to assure public safety.
(Ord. 2016-0055 § 19, 2016: Ord. 2013-0050 § 21, 2013.)