Certification of Zero Discharge of Separator Water

Certification of zero discharge of perchloroethylene-contaminated separator water is met by completing the following requirements:

• Seal or secure from spills and accidental discharges all floor drains in areas where perchloroethylene is stored or used. Cement plugs, standpipes or berms may be used for this purpose.
• Choose one of the following approved separator wastewater disposal methods and comply with associated requirements:
  • Off-site Waste Hauling Disposal manifests must be kept on-site for at least two years and must be made available to Sanitation Districts' personnel upon request.
  • On-site Evaporation to the Atmosphere Evaporators must vent to the atmosphere and have no connection to the sewer or any equipment that discharges to the sewer such as boilers, cooling towers or vacuum trucks. On December 9, 1994, the South Coast Air Quality Management District adopted Rule 1421 which set performance standards for wastewater elimination systems, including evaporators, that became effective June 9, 1996. It is the responsibility of the dry cleaner to be aware of, and comply with, any regulations pertaining to the operation of an evaporator.
• Complete the Perchloroethylene Dry Cleaner Zero Discharge Certification for Separator Wastewater forms. Keep one for your records and have it available for Sanitation Districts' Inspection staff and return the other to the Sanitation Districts. New facilities must submit this form prior to commencement of dry cleaning operations.

Requirements for Permitted Discharge of Separator Water

If a dry cleaner chooses to continue to discharge separator water to the Sanitation Districts' sewerage system, an industrial wastewater discharge permit must be obtained. In order to receive a permit, the discharger must complete a permit application in accordance with the Sanitation Districts' Information and Instructions for Obtaining an Industrial Wastewater Discharge Permit, pay any local application fees, propose and install a pretreatment system capable of reducing perchloroethylene to below 5 mg/l (the saturation level for perchloroethylene is approximately 150 mg/l) and provide a standard sampling box for monitoring purposes. In addition, the discharger will be required to perform regular self-monitoring for perchloroethylene.

Cost Estimate for Compliance

In order to assist dry cleaners in deciding which method to use to comply with these regulations, cost estimates have been made of the different options. These estimates are general in nature and should only be used as a starting point for estimating actual costs.

It is anticipated that most dry cleaners will opt for zero discharge of separator water because of the capital cost of pretreatment and sample box installation and the recurring cost of self-monitoring for perchloroethylene. Additional information is available from dry cleaner associations and the Institute for Research and Technical Assistance at 230 N. Maryland Avenue, Suite 103, Glendale, California, 91206, (818) 244-0300.

Required Response

To comply with these requirements, your company must submit to the Sanitation Districts either a completed Perchloroethylene Dry Cleaner Zero Discharge Certification for Separator Wastewater or a completed industrial wastewater discharge permit application. Should you choose to discharge separator water to the sewer, contact the Sanitation Districts' Industrial Waste Section at (562) 908-4288, extension 2900, and request a permit application package.

Failure to comply with these requirements will result in a violation of the Sanitation Districts' Wastewater Ordinance resulting in enforcement action against your company. This could include petitioning the court for the imposition of civil liability in a sum not to exceed $25,000 per day of violation.

If you have questions regarding these requirements, please contact the Sanitation Districts' Industrial Waste Section at (562) 908-4288, extension 2900.

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