§ 50.065  QUALITY DETERMINATION; EFFLUENT SAMPLING.
   (A)   Periodic measurements of flow, suspended solids, B.O.D., and other appropriate waste characteristics for surcharge determination and other purposes shall be made by those permittees specifically designated by the Director of Public Works. The Director shall determine the number of 24-hour flow measurements and samples required.  Continuous monitoring may be required by the Director in cases involving large fluctuations in quantity or quality of wastes, or if the wastewater appears to have characteristics which may damage the receiving system.
   (B)   All public sanitary sewer users whose total average sewage discharge is greater than 50,000 gallons per day, or whose total average discharge has a flow or pollutant loading requiring utilization of greater than 5% of the design capacity of the town's collection system, shall, unless exempted by the Director, install and maintain, at the user's expense, facilities for continuously measuring and sampling the total waste discharge.  This requirement may be waived for a particular user only when the quantity, flow rate, and characteristics of the wastewater can be adequately determined without such structures; when the physical arrangement of industrial plant facilities with respect to sewer facilities make such an arrangement unusually costly and other means of ascertaining the quantity, flow rate, and characteristics can be devised; or when previous sampling facilities have been built by either the town or a prior owner.
      (1)   When the Director shall determine for such facilities discharging less than 50,000 gallons per day that the nature of the discharge or conditions of the permit warrant continuous monitoring and sampling, the Director may require the user to install and maintain sampling facilities as stated heretofore.
      (2)   Any sampling facility previously built by the town shall become the maintenance responsibility of the user after the adoption of this chapter, unless the Director determines that it is in the best interest of the town to continue maintenance.
   (C)   All flow measurements, sampling, and analysis shall be performed by qualified personnel.  All laboratory analyses of industrial wastewater samples shall be performed by an EPA/DEM certified laboratory in accordance with current standard chemical analysis methods for wastewater established by EPA/DEM.  All samples shall represent the normal wastewater flow from the premises over a 24-hour period.  The samples shall be composited according to the flow, either manually with at least one sample collected hourly, or by automatic integrated sampling equipment.
   (D)   Unless otherwise prescribed by the Director, self-monitoring reports of the sampling shall be submitted to the town quarterly in accordance with the following schedule:
 
Monitoring Period
Report Due Date
January l - March 31
April 15
April l - June 30
July 15
July l - September l
October 15
October l - December 31
January 15
 
   (E)   Where a permittee operates as an integrated complex involving varying processes and having separate industrial waste sewer connections within the same contributory area, the permittee may be considered as one unit with multiple connections.  An analysis for each connection may be combined in proportion to the flow from the connection and the weighted average of the results thus obtained may be used as the measure of the total flow and concentration of the wasterwater discharged into the public sanitary sewer.
   (F)   The handling, storage, and analysis of all samples taken for the determination of the characteristics of waste discharged shall be performed in accordance with standard methods.
   (G)   The town may test for quality, to include sampling, any of the waste being discharged to the public sanitary sewers at any time.  A duly authorized representative of the Director may enter an industrial user's facility at any time, by appropriate application at the plant office during business or operational hours, for this purpose or for reviewing operations in the plant to estimate the quality of wastes being produced.
(Ord., passed 7-28-83)  Penalty, see § 50.999