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(a) A person who discharges other than normal domestic sewage shall install a suitable control manhole in the building sewer, together with such meters and appurtenances as the Director of Public Service may require, to permit observation, inspection, sampling and flow measurement of the combined wastes from the premises. The chamber shall be constructed according to approved plans, at the person's expense, and shall be maintained by him or her to be safe and accessible at all times.
(b) All measurements, tests and analyses of combined wastes shall be conducted in accordance with the latest edition of "Standard Methods for the Examination of Water and Wastewater."
(c) The strength of the wastes shall be determined from samples taken at the control manhole at any period of time or duration and in any manner the Division of Water and Sanitary Sewage may elect, or at any place mutually agreed upon by the person and the Division. The results of routine sampling and analysis by the person may also be used to determine the surcharge, after verification by the Division. If it is not possible to install a suitable control manhole for commercial users and/or other discharges with BOD and suspended solids concentrations greater than those defined for normal domestic sewage, the City shall take grab samples or use other reasonable measures and/or estimates to establish the strength of wastes for these users. The waste strength shall be used to determine the surcharge. The surcharge shall be applied to the total water consumption and shall be based on the average strength of all wastes discharged to the sewage works during the quarterly billing period.
(d) The Division shall assume the cost of the operation and the necessary analytical work of not more than two gauging and sampling manholes or points of discharge. The work time of Division personnel engaged in the field operations and laboratory analyses shall not exceed a five-day, forty-hour week.
If more than two gauging and sampling manholes or points of discharge are necessary, additional costs to install measurement devices, personnel costs required to operate the manholes or sampling points and subsequent laboratory analyses costs shall be borne by the person.
Where a person discharges effluent to a manhole used as a gauging and sampling point, and the effluent volume and duration prevent installation of hydraulic equipment until the person ceases operations by week-end closedown, the costs of the installation, including overtime pay, shall be borne by the person. If the person elects to install the hydraulic equipment, the installation shall be approved by the Director.
If a period in excess of the standard five-day, forty-hour week is required for Division personnel to properly gauge, sample and analyze the discharged effluent, the extra costs shall be borne by the person.
(e) If a person disagrees with the analysis on which the sewage surcharge is based, he or she may request, in writing, an additional sampling and analysis to be conducted in a manner acceptable to the Director. The cost of the additional sampling and analysis shall be borne by the person.
(f) If an analysis of the waste is not furnished to the Director upon request, the sewage surcharge shall be based on a chemical analysis of a similar process or other data acceptable to the Director. This surcharge shall continue in effect until an analysis of the waste is submitted by the person and confirmed by the Director.
(Ord. 91-59. Passed 10-21-91.)