Accidental discharges.

A. Each user shall provide for protection from accidental discharges of prohibited materials or of materials in volume or concentration exceeding limitations of this chapter or of an industrial wastewater discharge permit. Users shall immediately telephone and notify the Chief Plant Operator and/or Superintendent of Sewers of the discharge of wastes in violation of this chapter or any permit.B. Notification shall include the location of discharge, type of waste, concentration of pollutants, volume of discharge, reason for discharge, time and date discharge started and stopped, and corrective actions taken and to be taken.

Such discharges may result from:(1) Breakdown of pretreatment equipment.(2) Accidents caused by mechanical failure, or negligence.(3) Other causes.C. Where possible, such immediate notification shall allow the Chief Plant Operator and/or Superintendent of Sewers to initiate appropriate countermeasure action at the POTW. The user shall prepare a detailed written statement which describes the causes of the discharge and the measures being taken to prevent future occurrences, within five days of the occurrence, and the Chief Plant Operator and/or Superintendent of Sewers shall receive a copy of such report no later than the fifth business day following the occurrence.

Analytical results and their interpretation may be appended to the report at a date not exceeding 45 calendar days after the occurrence. Such notification shall not relieve the user of any expenses, loss, damage or other liability which may be incurred as a result of damage to person or property; nor shall such notification relieve the user of any fines, civil penalties or other liability which may be imposed by this article or other applicable laws.D. When required by the Chief Plant Operator and/or Superintendent of Sewers, detailed plans and procedures to prevent accidental or slug discharges shall be submitted to the Chief Plant Operator and/or Superintendent of Sewers, for approval.

The plan shall address, at a minimum, the following:(1) Description of discharge practices, including nonroutine batch discharges;(2) Description of stored chemicals;(3) Procedures for immediately notifying the POTW of any accidental or slug discharge. Such notification must also be given for any discharge which would violate any provision of the permit and any national prohibited discharge standard;(4) Procedures to prevent adverse impact from any accidental or slug discharge. Such procedures include, but are not limited to, inspection and maintenance of storage areas, handling and transfer of materials, loading and unloading operations, control of plant site runoff, worker training, building of containment structures or equipment, measures for containing toxic organic pollutants (including solvents), and/or measures and equipment for emergency response.