Significant Industrial Users

What is a Significant Industrial User?

A Significant Industrial User is:

1.  A user subject to categorical pretreatment standards; or

2.  A user that

  • (a) Discharges an average of twenty-five thousand (25,000) gpd or more of process wastewater to the POTW (excluding sanitary, noncontact cooling, and boiler blowdown wastewater);
  • (b) Contributes a process wastestream which makes up five (5) percent or more of the average dry weather hydraulic or organic capacity of the POTW treatment plant; or
  • (c) Is designated as such by Chester County Wastewater Recovery and/or SCDHEC on the basis that it has a reasonable potential for adversely affecting the POTW’s operation or for violating any pretreatment standard or requirement.
  • (d) Is a categorical industrial discharger.

Industrial -- Reporting

All industries permitted by Chester County Wastewater Recovery must perform self-monitoring and report quarterly results on analysis to CWR. As outlined by the rate study, results of analysis will be reported monthly due on or before the 14th day of the month for the preceding month. This will allow CWR to bill monthly for surcharges over 250 mg/L, BOD and TSS. We are presently charging a surcharge for all analysis over 300 mg/L BOD and TSS.

CWR also performs compliance monitoring and inspection of each industry at least once annually. Pretreatment compliance monitoring will be conducted over seven (7) consecutive days of sampling for each CWR-permitted industry. Any exceptions to this will be those industries who do not operate seven (7) days/week or 365 days/year. The minimum requirement by DHEC and EPA is to sample and inspect annually.

The industry is required to notify Chester County Wastewater Recovery of a violation of its permit within 24 hours of becoming aware of a violation. The user shall repeat sampling and analysis and submit the results of the repeated analysis to CWR within 30 days.

For more information, visit our Pretreatment Page.