(a) General. Although the sewage treatment works are capable of treating certain
abnormal industrial wastes, as heretofore defined in section 937.02 of these Rules and Regulations, the actual treatment of such wastes will increase the cost of operating and maintaining the public sanitary sewerage system. Therefore, there is hereby imposed upon each person discharging such abnormal industrial waste into the public sanitary sewerage system a surcharge, or surcharges, which are intended to cover such additional cost. Such surcharges shall be in addition to the regular sewage collection, transportation, and treatment charges set forth in the prevailing Sewer Charges of the Streets, Utilities and Public Services Code of Part Nine of the Codified Ordinances of the City of Clarksburg, and shall be payable as hereinafter provided in the amount hereinafter provided.
(b) Surcharge Sampling. The strength of any industrial waste, the discharge of which is to be subject to surcharge, shall be determined monthly, or more frequently if the Sanitary Board deems necessary, from samples taken either at the manhole or any other sampling point mutually agreed upon by the Sanitary Board and the producer of such waste. The frequency and duration of the sampling period shall be such as, in the opinion of the Sanitary Board, will permit a reasonably reliable determination of the average composition of such waste, exclusive of storm water runoff. Samples shall be collected or their collection supervised by a representative of the Sanitary Board and shall be in proportion to the flow of waste, exclusive of storm water runoff, and composited for analysis in accordance with the Current Edition of "Standard Methods for the Examination of Water and Wastewater." Except as hereinafter provided, the strength of the waste so found by analysis shall be used for establishing the surcharge or surcharges. However, the Sanitary Board may, if it so elects, accept the results of routine sampling and analyses by the producer of such wastes in lieu of making its own samplings and analyses.
(c) BOD Surcharge Rate. In the event any industrial waste is found by the Sanitary Board to have a BOD5 in excess of 300 milligrams per liter, the producer of said waste shall be surcharged an amount equal to the product of the actual volume of wastes in thousand gallons per billing period, exclusive of storm water runoff, discharged to the public sanitary sewerage system and the "BOD surcharge rate." The "BOD surcharge rate" shall be determined by the following formula:
Rc = 0.00834 x P x (C - 300)
Where Rc = the BOD surcharge rate in cents per 1,000 gallons of waste discharged.
P = the average annual fixed, operating and maintenance cost of secondary treatment processes per pound of BOD received at the treatment works. I.E., P=$0.39 per pound BOD in 1997.
C = the average BOD5 of the industrial waste expressed in milligrams per liter as determined in accordance with subsection (b) hereof.
The figure 300 appearing in the above formula corresponds to the maximum BOD5 permissible without surcharge. The figure 0.00834 is the factor to convert milligrams per liter to pounds per 1,000 gallons. No discount will be permitted for sewage or industrial wastes having a BOD5 of less than 300 milligrams per liter.
(d) Suspended Solids Surcharge Rate. In the event any industrial waste is found by the Sanitary Board to have an average suspended solids concentration in excess of 350 milligrams per liter, the producer of such waste shall be surcharged an amount equal to the product of the actual volume of wastes in thousand gallons per billing period, exclusive of storm water runoff, discharged to the public sanitary sewerage system and the "suspended solids surcharge rate." The "suspended solids surcharge rate" shall be determined by the following formula:
Rs = 0.00834 x B x (S - 350)
Where Rs = the suspended solids surcharge rate in cents per 1,000 gallons of waste discharged.
B = the average annual fixed, operating and maintenance cost of the sludge digestion, sludge drying and sludge disposal operations per pound of suspended solids received at the treatment works. I.E., B=$0.16 per pound of suspended solids in 1997.
S = the average suspended solids concentration of the abnormal industrial waste expressed in milligrams per liter as determined in accordance with subsection (b) hereof.
The figure 350 appearing in the above formula corresponds to the maximum suspended solids concentration permissible without surcharge. The figure 0.00834 is the factor to convert milligrams per liter to pounds per 1,000 gallons. No discount will be permitted for sewage or industrial wastes having a suspended solids concentration of less than 350 milligrams per liter.
(e) The surcharges provided for in this section shall be added to the regular sewerage service charge and any other industrial user charges imposed by the City under the prevailing Sewer Charges of this article. The surcharges shall be due at the same time and subject to the same late payment penalties and delinquency remedies established by the City for regular sewerage service charges.
(Ord. 02-16. Passed 5-16-02.)
(Ord. 02-16. Passed 5-16-02.)