No person shall discharge, directly or indirectly, into the county sewer system any wastewater the characteristics of which do not conform to the concentration limits prescribed herein or discharge into the county sewer system any toxic substances or any other objectionable material or substances as specified under these rules and regulations except upon written approval by the Chief Engineer and upon such terms and conditions as may be established by the Authority in the acceptance of the wastewater.
No person shall discharge or permit the discharge or infiltration into the county sewer system any of the following:
A. 
Any liquid or vapor having a temperature higher than 150º F. (65º C.) or in excess of that permitted by pretreatment standards.
B. 
Any liquid containing fat, wax, grease or oil, whether emulsified or not, in excess of 100 milligrams per liter of solvent soluble materials or containing substances which may solidify or become viscous at temperatures between 32º F. and 150º F. (0º C. and 65º C.).
C. 
Any wastewater that contains more than two parts per million by weight of the following gases:
(1) 
Hydrogen sulfide.
(2) 
Sulfur dioxide.
(3) 
Oxides of nitrogen.
D. 
Any residues from petroleum storage, refining or processing; waste fuels, lubricants or solvents.
E. 
Any wastewater containing any liquids, solids or gases which, by reason of their nature or quantity, are or may be sufficient, either alone or by interaction with other substances, to create an explosive, flammable or combustible atmosphere in any part of the county sewer system. At no time shall two successive readings on an explosion hazard meter at the point of discharge into the sewer system be more than 5% nor any single reading be over 10% of the lower explosive limited (LEL) of the meter.
F. 
Any solid or viscous substance in quantities or of such size capable of causing obstruction to the flow in sewers, such as but not limited to mud, straw, metal, rags, glass, tar, plastics, wood and shavings.
G. 
Any solid or viscous substance in quantities of such size capable of causing an interference with the proper operation of the county sewer system, such as but not limited to ashes, cinders, sand, feathers, unground garbage, whole blood, paunch manure, hair and fleshings, entrails, paper or plastic containers, etc., either whole or ground by garbage grinders.
H. 
Any garbage that has not been properly shredded.
I. 
Any waste having a pH lower than 5.0 or higher than 9.0 or having any other corrosive property capable of causing damage or hazard to structures, equipment and personnel of the Authority.
J. 
Any radioactive waste or isotope of such half-life or concentration as to be in excess of that permitted by appropriate regulatory agencies having control over their use or in such quantity as to cause damage or hazard to structures, equipment and personnel of the Authority.
K. 
Any waste containing noxious or malodorous solids, liquids or gases, which, either singly or by interaction with other wastes, is capable of creating a public nuisance or hazard to life or is or may be sufficient to prevent entry into a sewer for its maintenance and repair.
L. 
Any material which exerts or causes:
(1) 
An unusual concentration of inert suspended solids, such as but not limited to Fuller's earth, lime slurries and lime residues, or of dissolved solids, such as but not limited to sodium chloride and sodium sulfate.
(2) 
Excessive discoloration, such as but not limited to dye solutions and vegetable tanning solutions, which cannot be removed by the wastewater treatment plant.
(3) 
Unusual BOD, COD or chlorine requirements in such quantities as to constitute an unacceptable load on the wastewater treatment works.
(4) 
Any unusual concentrations of flow of any given constituent which, for any period of duration longer than 15 minutes, exceeds more than five times the average twenty-four-hour concentrations or flow rates during normal operation.
No person shall dispose of wastes from septic tanks, cesspools or other such sources of sanitary waste to the county sewer system without the written approval of the Chief Engineer.
No person shall discharge or cause to be discharged any new source of inflow into the county sewer system.
A. 
No person shall uncover, make any connections with or opening into, use, alter or disturb any element of the county sewer system without first obtaining the written approval of the Chief Engineer.
B. 
Connections to the county sewer system shall be designed and constructed to conform to the requirements and/or procedures set forth in Water Pollution Control Federation Manual of Practice No. 9 and all applicable state and local building and plumbing codes. All such connections shall be made gastight and watertight and shall be subject to the inspection and approval of the Chief Engineer.
No person shall discharge to the county sewer system any liquids containing toxic solids, liquids or gases in sufficient quantity, either singly or by interaction with other wastes, to injure or interfere with any wastewater treatment process, to constitute a hazard to humans or animals, to create a public nuisance, to prevent the attainment of effluent limitations as imposed by regulatory agencies or to create any hazard in the effluent of the wastewater treatment plan or the receiving waters.
The concentration in wastewater of any of the following substances shall be limited to the stated maximum concentrations in order to be acceptable for discharge to the county sewer system:
Substance
Permissible Concentration Maximum
(milligrams per liter)
Arsenic (as As)
4.0
Boron (as Bo)
1.0
Chromium (total)
5.0
Chromium (hexavalent)
2.0
Copper (as Cu)
1.0
Cyanide (total)
1.0
Iron (as Fe)
15.0
Lead (as Pb)
0.1
Nickel (as Ni)
1.0
Zinc (as Zn)
5.0
Cadmium (as Cd)
2.0
Phenol
0.1
Mercury (as Hg)
0.01
MBAS
10.0
Total solids
5,000.0
Silver (as Ag)
0.05
When appropriate regulatory agencies prohibit, establish pretreatment standards for or otherwise limit the discharge of any substance or pollutant, users will be required to reduce the discharge of the substances to the sewers to the levels prescribed by those agencies.
The admission into the county sewer system of any waters or waste having the following characteristics shall be subject to the review and approval of the Chief Engineer.
A. 
A five-day BOD concentration greater than 300 parts per million.
B. 
A suspended solids concentration in excess of 300 parts per million, by weight.
C. 
Incompatible pollutants, as defined within these rules and regulations.
D. 
Pollutants subject to pretreatment standards.
E. 
An average daily discharge in excess of 10,000 gallons.