(A) In order that the rates and charges may be justly and equitably adjusted to the service rendered to users, the town shall base its charges not only on the volume, but also on strength and character of the stronger-than-normal domestic sewage and wastes which it is required to treat and dispose of. The town shall require the user to determine the strength and content of all sewage and wastes discharged, either directly or indirectly into the sanitary sewage system, in such manner, by such method, and at such times as the town may deem practicable in light of the conditions and attending circumstance of the case, in order to determine the proper charge. The user shall furnish a central sampling point available to the town at all times.
(B) (1) Normal sewage domestic waste strength should not exceed ammonia-nitrogen in excess of 25 milligrams per liter of fluid, suspended solids in excess of 250 milligrams per liter of fluid, biochemical oxygen demand in excess of 250 milligrams per liter of fluid, or phosphorus in excess of 10 milligrams per liter of fluid.
(2) Additional charges for treating stronger-than-normal domestic waste shall be made on the following basis.
(a) Rate surcharge based upon suspended solids. There shall be an additional charge of $0.075 cents per pound of suspended solids for suspended solids received in excess of 250 milligrams per liter of fluid.
(b) Rate surcharge based upon BOD. There shall be an additional charge of $0.10 per pound of biochemical oxygen demand for BOD received in excess of 250 milligrams per liter of fluid.
(c) Rate surcharge based upon ammonia-nitrogen. There shall be an additional charge of $0.52 per pound of ammonia-nitrogen received in excess of 25 milligrams per liter of fluid.
(d) Rate surcharge based upon phosphorus. There shall be an additional charge of $0.887 per pound of phosphorus received in excess of ten milligrams per liter of fluid.
(C) The determination of suspended solids, biochemical oxygen demand, ammonia-nitrogen, phosphorus, ammonia and CBOD contained in the waste shall be in accordance with the latest copy of Standard Methods for the Examination of Water and Wastewater, as written by the American Public Health Association, the American Water Works Association and the Water Pollution Control Federation, and in accordance with Guidelines Establishing Test Procedures for Analysis of Pollutants, 40 C.F.R. part 136.
(D) If the town and the user can agree upon the relationship between BOD and CBOD, then CBOD may be used for calculating the BOD surcharge.
(1996 Code, § 108.27) (Ord. 487, passed 1-25-1994; Ord. 1997-3, passed 6-9-1997; Ord. 99-5, passed 5-10-1999)