Users shall sample their discharges to the POTW at a frequency necessary to assess and assure compliance with the requirements of this chapter, any permit or order issued pursuant to this chapter, all applicable pretreatment standards and requirements, other applicable state and federal laws and regulations, or as otherwise determined necessary by the WWTP Superintendent consistent with the purposes and intent of this chapter. At a minimum, all users shall sample their effluent two times per year and report the results to the POTW unless otherwise provided by the user's wastewater discharge permit. Each discharge point to the POTW shall be sampled and reported individually.