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Note: This information is provided for reference purposes only. Although the information provided here was accurate and current when first created, it is now outdated. All the links in the document have been removed. |
The MSGP provides coverage for six types of storm water discharges which are subject to effluent limitation guidelines, provided that the discharges are not already subject to an existing individual NPDES storm water permit. These storm water discharges include:
Facilities with discharges subject to any other effluent limitation guideline may not seek coverage under the MSGP for those discharges. Those facilities should contact their NPDES Storm Water Permitting Authority for further assistance. Monitoring is required for discharges subject to numeric storm water effluent limitations (described above) to determine compliance with those limits. Compliance monitoring is required to be performed on an annual basis (except for the mine dewatering discharges which are to be monitored quarterly with results submitted annually no later than November 30th for the previous four quarters). The annual monitoring period extends from October 1 to September 30 while quarterly periods for mine dewatering discharges run Oct-Dec, Jan-Mar, Apr-Jun, and Jul-Sep. Results from both annual and quarterly compliance monitoring must be reported annually and may be used to meet the quarterly analytical monitoring requirements for the specified pollutants, where compatible. Exhibit 6 lists those discharges that are subject to compliance monitoring and the respective parameters for which monitoring is required. Consult the for specific effluent limitations values.
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