At least once each year, the Public Utilities Director, based on the previous year's records of operation, flows, loads, costs and water consumption, shall compute or cause to be computed the following:
(a) The total yearly volume of sewage collected, conveyed and treated. Such total yearly volume shall consist of the volumes as measured at the sewage treatment plant and shall be expressed as follows:
(1) Hundreds of cubic feet of flow.
(2) Hundreds of pounds of BOD.
A. The quantity of BOD received from normal strength discharge shall be determined by applying the volume of flow as determined in subsection (b) hereof to the normal strength limitation of 300 mg/l. The actual strength measured quantity determined herein divided by normal strength quantity measured determines percentage at normal strength.
B. The quantity of BOD received from extra strength discharge shall be determined by subtracting the normal strength quantity determined as provided in subsection (a)(2)A. hereof from the quantity actually measured.
(3) Hundreds of pounds of SS.
A. The quantity of SS received from normal strength discharge shall be determined as provided in subsection (a)(2)A. hereof using the normal strength limitation of 300 mg/l. The actual strength measured quantity determined herein divided at normal strength quantity measured determines percentage of normal strength.
B. The quantity of SS received from extra strength discharge shall be determined as in subsection (a)(2)B. hereof.
(4) Hundreds of pounds of phosphates.
A. The quantity of phosphates received from normal strength discharge shall be determined as in subsection (a)(2)A. hereof using the normal strength limitation of twenty-five mg/l. The actual strength measured quantity determined herein divided by normal strength quantity measured determines percentage at normal strength.
B. The quantity of phosphates received from extra strength discharge shall be determined as in subsection (a)(2)B. hereof.
(5) Units of any other pollutant for which facilities and/or treatment is provided or which generates expense because of its existence.
A. Normal strength discharge shall be determined as in subsection (a)(2)A. hereof. Any actual strength quantity determined herein divided by normal strength quantity determines percentage of normal strength.
B. Extra strength discharge shall be determined as in subsection (a)(2)B. hereof.
(c) The estimated yearly volume of unknown sources flow. Such estimated yearly volume shall represent the difference of the volumes computed in subsection (a)(1) and subsection (b) hereof. Such volume, divided by the volume determined in subsection (a)(1) hereof, determines the percentage of flow unaccounted for.
(d) The total number of users connected in or otherwise discharging wastewater into the sewage disposal works;
(e) The total number of user charge bills for sewer service issued during the previous year;
(f) The total yearly administrative costs, which shall include, but not necessarily be limited to:
(1) Administrative salary costs (direct plus fringe benefits);
(2) Consulting fees (engineering, legal and financial);
(3) Administrative overhead costs (rent, telephone, utilities billings, collections, records, etc.);
(4) Miscellaneous costs (supplies, travel and subsistence, tuition reimbursements, mailing, printing, etc.); and
(5) Meter reading;
(g) The total yearly sanitary sewer operation and maintenance costs, which shall include, but not necessarily be limited to:
(1) Salary costs (direct plus fringe benefits);
(2) Estimated emergency overtime costs;
(3) Administrative overhead cost (same as subsection (f)(3) hereof);
(4) Materials, equipment repairs and rentals, supplies and inspection and surveillance devices (gas, oil, pipelines, etc.);
(5) Miscellaneous costs (same as subsection (f)(4) hereof); and
(6) Replacement costs;
(h) The total yearly wastewater treatment works operation and maintenance costs, which shall include, but not necessarily be limited to:
(1) Salary costs (direct plus fringe benefits);
(2) Estimated emergency overtime costs;
(3) Administrative overhead costs (same as subsection (f)(3) hereof);
(4) Treatment costs (power, materials, equipment repair and rentals, devices, chemicals, supplies, etc.);
(5) Miscellaneous costs (same as subsection (f)(4) hereof); and
(6) Replacement costs.
The costs established in subsections (h)(1) through (h)(6) hereof shall then be categorized as support costs, flow handling costs, BOD removal costs, SS removal costs, phosphate removal costs or other pollutant handling costs; and
(i) The total yearly Division of Sewers expenditures, which shall be represented by the sum of all of the costs and payments computed in subsections (f) through (h) hereof.
(Ord. 69-79. Passed 8-21-79.)