Any house sewer line, or part thereof hereafter constructed
or installed in the city, shall be constructed of bell and spigot
cast iron pipe with leaded joints when located less than fifty feet
from any well used as a domestic water supply.
(Prior code § 68.341)
Any subsurface sewage disposal unit or system, hereafter constructed
or installed in the city, shall consist of a septic tank with effluent
discharging into either (1) a serial distribution system, or (2) a
distribution box connected to a subsurface tile system consisting
of at least two lateral absorption lines, each of which lines shall
not exceed one hundred feet in length; provided, that, with the approval
of the director, such distribution box may be connected to a seepage
pit or pits each having at least four feet inside diameter.
(Prior code § 68.342)
Any septic tank hereafter constructed or installed in the city
shall meet the following minimum specifications:
A. Such
tank shall have an inside diameter of at least five feet with a liquid
depth of at least four feet. The length of the tank shall not exceed
three times the width of such tank. Such tank shall have a liquid
capacity of not less than one thousand gallons. Such tank shall have
at least two compartments, and a manhole with a minimum diameter or
width of twenty-two inches shall be installed in each compartment,
over the inlet and outlet pipe.
B. The
inlet and the outlet of such tank shall each be a vertical four inch
diameter "T" extending such a distance below the liquid level that
forty percent of the liquid depth is below it, and extending a minimum
of six inches above the liquid level of the tank. The outlet shall
be two inches below the inlet.
C. Such
tank shall be watertight and shall be constructed of concrete, concrete
block, brick or tile. The top of such tank shall be constructed of
reinforced concrete at least four inches thick. When such tank is
constructed the walls and bottom of the tank shall be at least six
inches thick and shall be adequately reinforced with steel or other
approved material. The concrete used for such tanks shall contain
one part cement, two parts sharp sand and four parts crushed rock
or gravel. Where brick, concrete block, or tile is used in the construction
of such tank, the inside shall be plastered with Portland cement mortar
composed of one part cement and three parts sand. The side walls of
such tank shall be adequately reinforced with steel or other approved
material so as to withstand any inside or outside pressure.
D. The
line from such septic tank to the distribution box shall be constructed
of watertight bell and spigot pipe, or such other pipe with watertight
joints that the director may approve.
(Prior code § 68.343)
Any distribution box hereafter constructed or installed in the
city shall meet the following minimum specifications:
A. Such
distribution box shall be watertight and shall be constructed of the
same materials authorized for construction of a septic tank. The inner
surface of the distribution box shall have a protective coating of
Hunt's emulsion, or some other protective coating equal thereto in
the opinion of the director.
B. The
outlets from such distribution box shall have exactly the same elevation
and shall be located at least two inches above the bottom of the box.
The inlet to such distribution box shall be one inch above the elevation
of the outlets.
C. Such
distribution box shall be connected to a subsurface tile system consisting
of at least two lateral absorption lines; provided, that one or more
seepage pits may be substituted for or used in conjunction with lateral
absorption lines when approved by the director.
D. All
lines leading from the distribution box to the lateral absorption
lines or to seepage pits shall be constructed with watertight joints.
(Prior code § 68.344)
Any subsurface tile system hereafter constructed or installed
in the city for the purpose of disposing of the effluent from a septic
tank shall meet the following minimum specifications:
A. Such
tile system shall consist of at least two lateral absorption lines
totaling at least two hundred feet in length; provided, however, that
no line shall exceed one hundred feet in length. The lines shall be
approximately equal in length, with a maximum variation of ten percent
between the longest line and the shortest.
B. Lateral
absorption lines shall be constructed of tile pipe spaced one-quarter
inch apart so as to provide open joints. The upper one-half of each
open joint shall be covered with tar paper or copper screen.
C. Each
lateral absorption line shall be placed in a trench thirty-six inches
deep and eighteen inches wide, which trench shall contain at least
twenty-one inches of rock or gravel grading one to one and one-half
inch. At least twelve inches of such rock or gravel shall be beneath
the bottom of the line, and four inches of such rock and gravel shall
be over the top of the line.
D. Lateral
absorption lines shall have a grade of two inches per one hundred
feet, with not more than fifty percent variation either way.
E. Lateral
absorption lines shall not be more than thirty-six inches below the
surface of the ground without the prior approval of the director.
F. Every
lateral absorption line shall be at least ten feet from every other
lateral absorption line. All bends used in the disposal field shall
have one tight joint to each end of the bend.
(Prior code § 68.345)
A seepage pit or series of seepage pits may be substituted for,
or used in conjunction with, a subsurface tile system, when such substitution
or use is approved by the director; provided, however, no seepage
pit shall be permitted where the director determines that its use
might contaminate or pollute an underground water supply.
(Prior code § 68.346)
Any seepage pit hereafter constructed or installed in the city
shall meet the following minimum specifications:
A. Such
seepage pit shall be not less than four feet inside diameter and shall
be constructed to a depth where the side wall area of the seepage
pit will have sufficient porosity to provide adequate drainage as
determined by the director.
B. Such
seepage pit shall be either rectangular or round. In the case of a
rectangular shape, such seepage pit shall be constructed of brick,
concrete block, and/or two-inch redwood plank securely braced with
four-inch by four-inch redwood timber. In the case of a round shape,
such seepage pit shall be constructed of brick, concrete block, and/or
one-inch redwood boards of full thickness with supporting two-inch
by three-inch redwood timbers placed every five feet so as to form
a securely braced octagon shape.
C. The
top of such seepage pit shall be covered with a concrete slab or cover
constructed of concrete reinforced with steel or other approved material,
which slab or cover shall extend not less than eighteen inches beyond
the outside of the side walls of the seepage pit.
(Prior code § 68.347)
The minimum standard for septic tanks, distribution boxes, tile
lines and seepage pits, as set forth in this chapter, are the minimum
standards for a subsurface sewage disposal system or unit serving
a one-family or two-family residence or small institution or industry
having sanitary facilities used by not more than ten persons.
(Prior code § 68.348)
Every applicant for a permit to install or construct a subsurface sewage disposal system or unit to serve residences, institutions or industries, other than a one-family or two-family residence or a small institution or industry having sanitary facilities used by more than ten persons, shall submit to the director for approval the detailed plans and specifications of the proposed subsurface sewage disposal system. Upon the filing of the required application, accompanied by such detailed plans and specifications, the payment of the fee prescribed in Section
13.20.090 and the approval of such plans and specifications by the director, the director shall issue a permit for the construction of such subsurface sewage disposal system.
(Prior code § 68.349)
Nothing contained in this chapter shall be construed to prevent
the director from requiring compliance with higher or more stringent
requirements or specifications than those contained in this chapter
where compliance with such higher or more stringent requirements or
specifications is necessary to maintain a sanitary condition.
(Prior code § 68.350)
Nothing contained in this chapter shall be construed to prevent
the director from establishing lower or less stringent requirements
or specifications than those contained in this chapter in such cases
where a subsurface sewage disposal unit or system may be maintained
at such lower or less stringent requirements or specifications in
a sanitary condition without detriment to the public health or safety.
(Prior code § 68.351)