ARTICLE II. OPERATING
PROCEDURES
Sec. 18.1-30. Prohibitions and limitations on use of the public
sewer system.
(a) No person shall discharge or deposit or cause or allow to be discharged or
deposited into the public sewer system any wastewater which contains the following:
(1) Oils and grease.
a.
Oil and grease concentrations or amounts from users violating federal, state, or HRSD
pretreatment standards.
b. Wastewater from users containing floatable oil,
wax, fats, or grease concentration of mineral origin of more than one hundred (100)
milligrams per liter whether emulsified or not.
(2)
Any gasoline, benzene, naphtha, solvent, fuel oil or a liquid, solid, or gas that
may cause flammable or explosive conditions, including, but not limited to, wastestreams
with a closed cup flashpoint of less than one hundred-forty degrees (140°) Fahrenheit
using test methods specified in 40 CFR 261.21.
(3) Noxious material.
Noxious or malodorous solids, liquids, or gases, which, either singly or by interaction
with other wastes, are capable of creating a public nuisance or hazard to life, or are or
may be sufficient to prevent entry into the system for its operation, maintenance, and
repair.
(4) Improperly shredded garbage.
Garbage that has not been ground or comminuted to such a degree that all particles will be
carried freely in suspension under flow conditions normally prevailing in the public sewer
system, with no particle greater than one-half (½") inch in any dimension.
(5) Radioactive waste.
Radioactive wastes or isotopes of such half-life or concentration that they do not comply
with regulations or orders issued by the appropriate authority having control over their
use and which will or may cause damage or hazards to the system or personnel operating the
system.
(6) Solid or viscous
wastes. Solid or viscous wastes which will or may cause or contribute to obstruction
in the flow of wastewater in a sewer, or otherwise interfere with the proper operation of
the system. Prohibited materials include, but are not limited to: grease, uncomminuted
garbage, animal guts or tissues, paunch manure, bones, hair, hides or fleshings, entrails,
whole blood, feathers, ashes, cinders, sand, spent lime, stone or marble dust, metal, mud,
glass, straw, shavings, grass clippings, rags, spent grains, spent hops, waste paper,
wood, plastics, tar, asphalt residues, residues from refining or processing of fuel or
lubricating oil, seafood processing by-products, and similar substances.
(7)
Unpolluted waters. Any unpolluted water including, but not limited to: water from
cooling systems or of storm water origin, which will increase the hydraulic load on the
system.
(8) Corrosive wastes. Any
waste which will cause corrosion or deterioration of the system. All wastes discharged to
the system shall have a pH value in the range of five (5) to ten (10) standard units.
Prohibited materials include, but are not limited to: acids, sulfides, concentrated
chloride and fluoride compounds, and substances which will react with water to form acidic
products.
(b) No person shall discharge or
convey or permit or allow to be discharged or conveyed to the public sewer system any
wastewater containing pollutants of such character or quantity that will:
(1) Not be susceptible to treatment
or cause interference with the process or efficiency of the system.
(2) Constitute a hazard to human or
animal life or to the stream or water course receiving the wastewater treatment plant
effluent.
(3) Violate federal, state, or HRSD
pretreatment standards.
(c) No person owning vacuum or
septic tank pump trucks or other liquid wastewater transport trucks shall discharge
directly or indirectly such wastewater into the public sewer system, unless such person
shall first have applied for and received a permit from the county and HRSD for each
vehicle. All applicants for this permit shall complete such forms as required by the
county and HRSD, pay any required fees, and agree in writing to abide by the provisions of
this section and any special conditions or regulations established by the county and HRSD.
Such permit shall be limited to the discharge of domestic wastewater containing no
industrial wastewater. The county and HRSD shall designate the locations and times where
such trucks may be discharged and may refuse to accept any truck load of wastewater where
it appears that the wastewater could cause interference with the effective operation of
the wastewater system.
(d) No person shall discharge any
other holding tank wastewater into the system unless he shall have applied for and have
been issued a permit by the county and HRSD. Unless otherwise allowed under the terms and
conditions of the permit, a separate permit must be secured for each location of
discharge. This permit shall include the time of day the discharge is to occur, the volume
of the discharge, and shall limit the wastewater constituents and characteristics of the
discharge. Such user shall pay any applicable charges or fees therefor and shall comply
with the conditions of the permit. No permit, however, will be required to discharge
domestic wastewater from a recreational vehicle or a marine vessel holding tank, providing
such discharge is made into an approved facility designed to receive such wastewater.
(e) Grease, oil, and sand traps
shall be provided in accordance with the following:
(1) Establishments involved
in the preparation of food for commercial purposes shall provide grease interceptors or
traps. Grease, oil, and sand interceptors or traps shall be provided by others when
necessary for the proper handling of liquid wastes containing grease in excessive amounts,
sand and other harmful ingredients, except that such interceptors or traps will not be
required for dwelling units.
(2)
All interceptors or traps shall be of a type and capacity approved by the building
official, and shall be located so as to be readily and easily accessible for cleaning and
inspection. They shall be constructed of impervious materials capable of withstanding
abrupt and extreme changes in temperatures and shall be of substantial construction,
gastight, watertight, and equipped with easily removable covers.
(3) All grease, oil, and sand
interceptors or traps shall be maintained by the user in continuously efficient operation
at all times.
(4) Approval of proposed facilities
or equipment by the health officer or building official does not, in any way, guarantee
that such facilities or equipment will function in the manner described by their
constructor or manufacturer; nor shall it relieve a person, firm, or corporation of the
responsibility of enlarging or otherwise modifying such facilities to accomplish the
intended purpose.
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