No person shall discharge or cause to be discharged any of the following described waters or wastewaters to any sanitary sewer:
(A) 
Any existing excessive infiltration, inflow, or unpolluted wastewater as determined by the Approving Authority to be causing an overload on the wastewater plant. Any existing building sewers that are determined to be carrying excessive infiltration, inflow, or unpolluted wastewater will be required to eliminate it as specified in sec. 52.28. After the effective date of this chapter no new building sewers shall be designed or constructed to carry infiltration, inflow, or unpolluted wastewater.
(B) 
Any gasoline, benzene, naphtha, fuel oil, or other flammable or explosive liquid, solid, or gas.
(C) 
Any liquid or vapor having a temperature higher than 150° Fahrenheit, or any substance which causes the temperature of the total wastewater treatment plant influent temperature to 110° Fahrenheit.
(D) 
Any wastewater containing fats, wax, grease, or oils, whether emulsified or not, in excess of 100 mg/l or containing substance which may solidify or become viscous at temperatures between 35° and 150° Fahrenheit.
(E) 
Any garbage from the preparation, cooking, and dispensing of food that has not been shredded to such a degree that all particles will be carried freely under the flow conditions normally prevailing in the sanitary sewers, with no particles greater than 1/2-inch in any dimension. The installation and operation of any garbage grinder equipped with a motor of 3/4 horsepower or greater shall be subject to the review and approval of the Approving Authority.
(F) 
Strong acid, iron pickling wastes, or concentrated plating solutions, whether neutralized or not.
(G) 
Any wastewater containing objectionable or toxic substances to much a degree that the composite wastewater received at the wastewater treatment plant exceeds the limits established by the Approving Authority for such substances.
(H) 
Any wastewaters containing obnoxious, toxic, or poisonous solids, liquids, or gasses in sufficient quantity, either singly or by interaction with other waste, to injure or interfere with any wastewater treatment process, constitute a hazard to humans or animals, or create any hazard in the receiving waters of the wastewater treatment plant, including, but not limited to:
(1) 
Any Cyanide greater than 2.0 mg/l.
(2) 
Any Chlorides greater than 500 mg/l.
(3) 
Concentrations of the following heavy metals greater than the concentrations indicated below.
ELEMENT
mg/l
Arsenic
0.05
Barium
5.00
Boron
1.00
Cadmium
0.02
Chromium (Total)
5.00
Cooper
1.00
Iron
1.00
Lead
0.100
Manganese
1.000
Mercury
0.005
Nickel
1.000
Selenium
0.020
Silver
0.100
Zinc
5.000
(4) 
All other heavy metals and toxic materials, including, but not limited to, the following, shall be excluded from the wastewater system unless a permit specifying the conditions of pretreatment, concentrations, volumes, and the like, is obtained from the city.
Antimony
Beryllium
Bismuth
Cobalt
Molybdenum
Uranyl ion
Pesticides
Rhenium
Strontium
Tellurium
Herbicides
Fungicides
(5) 
Chemical Oxygen Demand (C.O.D.) in excess of 300 mg/l.
(I) 
Any wastewaters having a pH lower than 5.5 or higher than 9.5, or having any other corrosive property capable of causing damage or hazard to structures, equipment, and personnel at the wastewater facilities.
(J) 
Solid or viscous substances in quantities or of such size capable of causing obstruction to the flow in sewers, or other interference with the proper operations of the wastewater works such as, but not limited to, ashes, cinders, sand, mud, straw, shavings, metal, glass, rags, feathers, tar, plastics, wood, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, paper dishes and cups, milk containers, and the like, either whole or ground by garbage grinders; lime slurry, lime residues, slops, chemical residues, paint residues, or bulk solids.
(K) 
Any wastewaters containing phenols in excess of 2.0 mg/l, the sulfide ion in excess of 5.0 mg/l, or other deleterious substances, in such concentration exceeding limits which may be established by the Control Authority, as necessary after treatment of the composite wastewater, to meet the requirements of the state, federal, or other public agencies having jurisdiction for such discharge to the receiving waters.
(L) 
Any radioactive wastes or isotopes into the public sewer without the permission of the Control Authority. The Control Authority may establish, in compliance with applicable state and federal regulations, regulations for discharging of radioactive wastes into public sewer.
(M) 
Materials which exert or cause:
(1) 
Unusual concentrations of inert suspended solids greater than 250 mg/l (such as, but not limited to, Fuller’s earth, lime slurries and lime residues).
(2) 
Excessive dissolved solids greater than 1,100 mg/l including, but not limited to, sodium chloride and sodium sulfate.
(3) 
Excess discoloration (such as, but not limited to dye wastes and vegetable tanning solutions).
(4) 
Unusual B.O.D. (greater than the amount established in sec. 52.01, definition of NORMAL DOMESTIC WASTEWATER), chemical oxygen demand or chloride demand in such quantities as to constitute a significant load on the wastewater treatment works.
(5) 
Unusual volume of flow or concentration of wastes constituting SLUGS, as defined in sec. 52.01, shall be regulated to equalize the flow and/or concentration to levels acceptable to the city if such waste can cause damage to collection facilities, impair the treatment process, incur treatment costs exceeding those for normal wastewater, or render the waste unfit for stream disposal or industrial use.
(N) 
Waters or wastes containing substances which are not amenable to treatment or reduction by the wastewater treatment processes employed; or are amendable to treatment only to such degree that the wastewater treatment plant effluent cannot meet the requirements of regulatory agencies having jurisdiction over discharge to receiving waters, including NPDES permit requirements; or otherwise interfere with POTW processes and operations to include prevention of proper use or disposal of sludge by the POTW in accordance with various federal and state statues, and regulatory requirements including, but not limited to, Section 405 of the Clean Water Act, the Solid Waste Disposal Act (SWDA) (Title II, Resource Conservation and Recovery Act [RCRA]), the Clean Air Act and the Toxic Substances Control Act.
Penalty, see sec. 10.99
(Ordinance 272 adopted 10/9/87)
Except in quantities or concentrations or with provisions as stipulated herein, it shall be unlawful for any person, corporation, or individual, to discharge water or wastes to the sanitary sewer that:
(A) 
Can deposit grease, oil, or solid material in the sewer lines in such a manner as to clog the sewers.
(B) 
Can overload skimming and grease handling equipment.
(C) 
Are not amenable to bacterial action and will, therefore, pass through to the receiving waters without being treated satisfactorily by normal wastewater treatment processes.
(D) 
Can have deleterious effects on the treatment process due to the excessive quantities.
Penalty, see sec. 10.99
(Ordinance 272 adopted 10/9/87)
Upon promulgation of Federal Categorical Pretreatment Standards for a particular industrial subcategory, the Categorical Standards, if more stringent than the limitations imposed under this chapter, shall immediately supersede the limitations imposed under this chapter. All regulatory requirements contained in the standard, including specific quantities or concentrations of pollutants or pollutant properties which may be discharged to the POTW by a regulated industry and the reporting requirements contained within the standard, shall be applicable in addition to the provisions of this chapter.
(Ordinance 272 adopted 10/9/87)
The city reserves the right to establish by ordinance more stringent limitations or requirements on discharges to wastewater disposal system if deemed necessary to prevent interference with the POTW, and otherwise assist in complying with the objectives of this chapter.
(Ordinance 272 adopted 10/9/87)
Unless exception is granted by the Approving Authority, all persons discharging wastewater or polluted liquids shall use the city’s sanitary sewer system. No person shall deposit or discharge any wastewater or polluted liquids on public or private property in or adjacent to any natural outlet, natural watercourse, storm sewer, or other area within the jurisdiction of the city without the approval of the Approving Authority, or unless authorized by a permit from the Texas Water Commission. The Approving Authority shall verify prior to discharge that any wastewaters so authorized to be discharged will receive suitable treatment to satisfy the provisions of the laws, regulations, ordinances, rules and orders of the federal, state, and local governments.
Penalty, see sec. 10.99
(Ordinance 272 adopted 10/9/87)
(A) 
If any wastewaters are discharged, or are proposed to be discharged to the sanitary sewer, which contain the substances or possess the characteristics enumerated in secs. 52.20 and 52.21 of this chapter and which, in the judgement of the Approving Authority, may have a deleterious effect upon the wastewater works, processes, treatment, equipment, or receiving waters, which create a hazard to life or health constitute a public nuisance, or which otherwise may cause the city to be in violation of its permitted discharge limitations, the Approving Authority may:
(1) 
Reject the wastes (following notice to the affected user and providing an opportunity for response).
(2) 
Require repair, replacement, or adjustment of building drains or sewers to reduce or eliminate infiltration inflow.
(3) 
Require pretreatment to an acceptable condition for discharge to the sanitary sewer.
(4) 
Require elimination, reduction, or equalization of the quantities and rates of discharge.
(5) 
Require payment to cover the excess costs of handling and treating the wastewaters that are in excess of normal domestic wastewater in quantity or quality under the provisions set forth in secs. 52.20 and 52.21.
(B) 
If the Approving Authority selects items (2), (3), or (4) in division (A) above, and design, installation, or repairs that may be required shall be subject to review by the Approving Authority, and subject to the requirements of all applicable codes, ordinances, and laws. These facilities shall be installed and maintained in an effective operating condition at the person’s own expense.
(Ordinance 272 adopted 10/9/87)
Any person discharging industrial wastewater to the sanitary sewer, upon notification by the Approving Authority, shall install a suitable manhole or control point with the necessary meters and other appurtenances in the building sewer to facilitate observation, sampling, and measurement of the wastewater. The manhole or point, when required, shall be accessible with plans approved by the Approving Authority. The manhole or point shall be installed and maintained to be safe and accessible at all times at the person’s own expense.
Penalty, see sec. 10.99
(Ordinance 272 adopted 10/9/87)
(A) 
At the discretion of the Approving Authority, a self-reporting system of measurements, tests, and analyses of industrial wastewater discharges may be established to monitor the discharge. The frequency of measurements, tests, analyses and self-reporting that shall be required from the person discharging industrial wastewater shall be determined by the Approving Authority.
(B) 
All measurements, tests, and analyses of the characteristics of the wastewaters to which reference is made in this section shall be determined by Standard Methods from suitable sampling or monitoring at the manhole or control point referred to in this subchapter. Sampling and monitoring shall be done by customarily accepted methods to reflect the effect of the wastewater on the wastewater facilities and to determine the existence of hazards to the public life, health, and property.
(Ordinance 272 adopted 10/9/87)
(A) 
Traps to be provided.
Grease, oil, and sand traps shall be provided for the proper handling of wastewaters containing grease or oils in excessive amounts, or any flammable wastes, sands, or other harmful ingredients. Traps shall be installed and maintained in an effective operating condition at the person’s own expense.
(B) 
When grease traps required.
Wastes from kitchen sinks and/or dishwashers in a hotel, restaurant, club house, boarding house, public institution, hospital, or similar institutions shall encounter a trap of adequate size before entering the sanitary drain or sewer. The grease trap shall be properly vented and if more than four feet horizontally or 30 inches vertically from the outlet of the fixture it serves, then the fixture shall have a separate trap and vent. The grease retaining capacity of each grease trap in pounds of grease, shall be equal to twice the rate of flow capacity in gallons per minute of wastewater so that the trap shall remove and retain 90% of the grease discharged into it up to its required capacity of accumulated grease. For calculating the required sizes of grease traps the rate of discharge from each fixture connected to the trap shall be based upon the rates shown in the following table:
Type of fixture
Rate of flow in GPM
Single compartment sink with 1-1/2 in. waste
15
Double compartment sink with 1-1/2 in. waste
20
Triple compartment sink with 2 in. waste
25
Dishwashers up to 30 gallon water capacity
15
Dishwashers up to 50 gallon water capacity
25
Dishwashers up to 100 gallon water capacity
40
Floor drain – each
5
(C) 
Size of traps.
Manufactured grease traps shall be selected to fit the flow rate requirements of the connected fixtures from the manufacturer’s rating schedule. Concrete grease traps shall be sized as follows: Minimum size up to 7 GPM 18 x 24 inches deep. For each additional GPM flow rate, size shall be increased by one cubic foot.
(D) 
Slaughter waste.
All wastewater from abattoirs, poultry dressing plants, and fish and/or seafood markets, when such water is used in connection with killing, dressing, cleaning, washing, or handling of such animals, poultry, or seafood shall discharge into a trough not less than four inches deep and six inches wide. This trough shall discharge into a properly trapped and vented catch basin not less than 24 x 24 x 30 inches with tight-fitting solid cover and frame. (See Director of Public Works for proper size.) In fish or seafood markets, the catch basin shall have a two-inch vent extending through the roof independently of any other vent.
(E) 
Washateria waste.
Wastewater from washing machines in washaterias shall discharge into a trough as described in division (D) of this section or into a collection system of copper or cast iron stand-pipes and drain pipes. This system shall then discharge in a “P” trap which is connected to a properly sized catch basin. The “P” trap need not be vented if it is within 50 feet of the catch basin.
(1) 
Catch basin sizes.
Number of Washing Machines
Catch Basin Size
0–24
24 x 24 x 48 inches deep
24–30
30 x 30 x 48 inches deep
30–60
36 x 36 x 48 inches deep
(2) 
Other interceptors.
Other interceptors and/or separators shall be used when, in the judgement of the Director of Public Works, they are necessary containing elements harmful to the building drainage system, the public sewer, the sewage treatment plant, or any of its processes.
(F) 
Residential units.
A grease interceptor is not required for individual dwelling units or private living quarters.
(G) 
Venting interceptors.
Interceptors shall be so designed that they will not become air bound if closed covers are used. Each interceptor shall be properly vented.
(H) 
Accessibility of interceptor.
Each interceptor shall be so installed as to provide ready accessibility to cover and means for servicing.
(I) 
Sand interceptors (sand traps).
All discharges to the sanitary sewer which may contain sand and/or grit, such as car wash or grease rack, shall be provided with an interceptor (sand trap), in accordance with specifications.
(J) 
Storm water to be excluded.
All fixtures connected to the sanitary sewer shall be so designed that all rainwater (storm water) will be excluded.
Penalty, see sec. 10.99
(Ordinance 272 adopted 10/9/87)