No person shall discharge or cause to be discharged any of the following described water or wastes to any public sewer or drain:
(A) Any gasoline, benzene, naptha, fuel oil, or other flammable or explosive liquid, gas, or solid, or any substance which may generate or form any flammable, explosive, or combustible substance, fluid, gas, vapor, or mixture when combined with air, water, or other substances commonly found in sewers. This includes, but is not limited to, pollutants which cause an exceedance of 10% of the lower explosive limit (LEL) at any point in the POTW or wastes with a closed cup flash point in the POTW or wastes with a closed cup flash point of less than 140°F or 60°C, using the test method specified in 40 CFR 261.21.
(B) Any waters or wastewaters that either independently or by interaction with other wastewaters, pass through or cause interference with any part of the POTW, exceed any national pretreatment standard, or constitute a hazard to humans or animals in the receiving waters or the POTW. This includes but is not limited to interference, substances which cause pass through or other problems caused by:
(1) Solid or viscous pollutants.
(2) Oxygen demanding pollutants.
(3) Waste causing POTW upsets.
(4) Pollutant discharges at specific rates or concentrations.
(5) Heat in amounts which would inhibit biological activity or cause the POTW influent to exceed 104° F.
(6) Petroleum oil, nonbiodegradable cutting oil, or products of mineral oil origin.
(7) Color or odor causing substances.
(8) Table of limited pollutants.
COMPOUND | mg/l |
Copper | 4.55 |
Cyanide (T) | 2.86 |
Lead | 0.94 |
Mercury | 0.023 |
Silver | 0.90 |
Zinc | 10.42 |
(C) Any waters or wastewaters having a pH lower than 5.0 or higher than 11.5 or having any other corrosive property which may be cable of causing damage or hazard to structures, equipment, and/or personnel of the POTW. In no case shall the quantities of waters or wastewaters be such that the pH of the influent to the POTW is caused to exceed a pH of 8.0.
(D) Any waters or wastewaters which result in the presence of toxic bases, vapors, or fumes within the POTW in a quantity that may cause acute worker health and safety problems.
(E) Any trucked or hauled pollutants, except at discharge points designated by the POTW.
(F) Any medical/infectious wastes, pharmaceutical waste, or radiological waste except as specifically authorized in a discharge permit.
(G) Any wastewater causing the wastewater treatment plant's effluent or sludge to fail a toxicity test.
(H) Any garbage that has not been properly shredded by an approved garbage disposal unit.
(I) Any waters or wastewaters containing heavy metals, solvents, and similar objectionable or toxic substances to such degree that any such material discharged to the public sewer exceeds the limits established by the Public Works Director, the New Hampshire Water Supply and Pollution Control Division or the EPA for such materials.
(J) Any waters or wastewaters containing suspended solids, BOD, COD, or color of such character and quantity that would impose deleterious effects on the operation of the POTW or require more than normal attention or expense to handle.
(K) Any radioactive wastes of such half-life or concentration as may exceed limits established by the Public Works Director in compliance with applicable State or Federal regulations.
(L) (1) Any hazardous waste listed or designated by State or Federal regulations.
(2) Daily concentrations are the concentration of a pollutant discharged, determined from the analysis of a flow composited sample (or other sampling procedure approved by the Public Works Director) representative of the discharge over the duration of a 24 hour day or industrial operating schedule of less than 24 hours. For industrial discharge applications, the above limits shall apply at the end of the process train prior to dilution with nonindustrial wastewaters.
(M) Screening levels. Any waters or wastewaters with any of the following constituents at daily concentration greater than those indicated in the table of screening levels below:
(1) Table of screening levels.
COMPOUNDS | mg/l |
COMPOUNDS | mg/l |
Benzene | 0.13 |
BOD | 350 |
Carbon disulfide | 0.06 |
Chlorine | 1,500 |
Chloroform | 0.41 |
1.2 Dichloroethylene | 0.28 |
Sulfide | 1.0 |
Sulfate (for Type II concentrate) | 1,500/150 |
Sulfite | 280 |
Suspended solids | 350 |
Tetrachloroethylene: | 0.53 |
1,1,1 trichloroethane | 1.55 |
Trichloroethene | 0.71 |
OIL AND GREASE | |
Petroleum or mineral origin | 100 ppm |
Animal and vegetable origin | 350 ppm |
(2) Screening levels are concentrations above which a particular pollutant is expected to create problems due to health, flammability, chemical reactivity, or organic/solids loadings.
(3) If any of the screening levels are exceeded and repeat analyses indicate noncompliance with the screening level, then the Industrial User may be required at the discretion of the city, to implement a study to evaluate the potential impact of the discharge of this pollutant to the city's collection system or wastewater treatment facility. This study must be conducted under the supervision and approval of the city.
(4) Upon evaluation of pH, temperature, dilution, type of sewer construction, other toxic fumes and ventilation present at the site of the particular discharge, screening levels shall then be adjusted and administered as limits for the specific discharge.
(Ord. passed 1-17-95; Am. Ord. passed 10-1-96; Am. Ord. passed 8-5-97; Am. Ord. passed 12-2-14) Penalty, see § 52.999