NPDES GENERAL PERMIT - S.C.

1 NPDES GENERAL PERMIT FOR STORM WATER DISCHARGES ASSOCIATED WITH INDUSTRIAL ACTIVITY TABLE OF CONTENTS 1. Coverage under this PERMIT . 5 Eligibility. 5 Facilities Covered. 5 Allowable Stormwater Discharges. 5 Allowable Non Stormwater Discharges. 6 Limitations on Coverage. 8 Discharges Mixed with Non-Stormwater. 8 Stormwater Discharges Associated with Construction Activity. 8 Discharges Currently or Previously Covered by Another PERMIT . 8 Stormwater Discharges Subject to Effluent Limitations Guidelines. 8 Consistency with Municipal Separate Storm Sewer Systems (MS4).

2 8 [Reserved] 9 New Discharges to Water Quality Impaired Waters. 9 New Discharges to Waters Designated as ONRW for Antidegradation Purposes. 9 PERMIT Compliance. 9 Authorization under this PERMIT . 9 How to Obtain Authorization. 10 Continuation of this PERMIT . 12 Terminating Coverage. 12 Submitting a Notice of Termination. 12 When to Submit a Notice of Termination. 12 Conditional Exclusion for No Exposure. 13 Alternative Permits. 13 Department Requiring Coverage under an Alternative PERMIT . 13 Permittee Requesting Coverage under an Alternative PERMIT .

3 14 Severability. 14 2. Control Measures and Effluent Limits. 14 Control Measures. 15 Control Measure Selection and Design Considerations 15 Non Numeric Technology Based Effluent Limits (BPT/BAT/BCT). 15 Minimize Exposure. 15 Good Housekeeping. 16 Maintenance. 16 Spill Prevention and Response Procedures. 17 Erosion and Sediment Controls. 18 Management of Runoff. 18 Salt Storage Piles or Piles Containing Salt/Pavement Deicing Activities 18 Sector Specific Non-Numeric Effluent Limits. 19 Employee Training. 19 Non-Stormwater Discharges.

4 19 Waste, Garbage and Floatable Debris. 20 Dust Generation and Vehicle Tracking of Industrial Materials. 20 Numeric Effluent Limitations Based on Effluent Limitations Guidelines 20 Water Quality-Based Effluent Limitations. 20 Water Quality Standards 20 Discharges to Water Quality Impaired Waters. 21 Existing discharge to an Impaired Water with an EPA Approved or Established TMDL. 21 Existing discharge to an Impaired Water without an EPA Approved or Established TMDL. 21 New discharge to an Impaired Water. 21 Antidegradation Requirements for New or Increased Dischargers 21 [Reserved] 22 2 3.

5 Corrective Actions 22 Conditions Requiring Review and Revision to Eliminate Problem 22 Conditions Requiring Review to Determine if Modifications Are Necessary 22 Corrective Action Deadlines 23 Corrective Action Report 24 Effect of Corrective Action 24 Substantially Identical Outfalls 24 4. Inspections 24 Routine Facility Inspections. 24 Routine Facility Inspection Procedures. 25 Routine Facility Inspection Documentation. 25 Exceptions to Routine Facility Inspections. 25 Quarterly Visual Assessment of Stormwater Discharges.

6 26 Quarterly Visual Assessment Procedures. 26 Quarterly Visual Assessment Documentation. 27 Exceptions to Quarterly Visual Assessments. 27 Comprehensive Site Inspections. 28 Comprehensive Site Inspection Procedures. 31 Comprehensive Site Inspection Documentation. 31 5. Stormwater Pollution Prevention Plan (SWPPP). 30 Contents of Your SWPPP. 31 Stormwater Pollution Prevention Team. 31 Site Description. 31 Summary of Potential Pollutant Sources. 33 Activities in the area. 33 Pollutants. 33 Spills and Leaks.

7 33 Non-Stormwater Discharges. 33 Salt Storage. 34 Sampling Data. 34 Description of Control Measures. 34 Control Measures to Meet Technology-Based and Water Quality-Based Effluent Limits. 34 Schedules and Procedures 34 Pertaining to Control Measures Used to Comply with the Effluent Limits in Part 2. 34 Pertaining to Monitoring and Inspection. 35 [Reserved]. 35 Signature Requirements. 36 Required SWPPP Modifications. 36 SWPPP Availability. 37 Additional Documentation Requirements. 37 6. Monitoring. 38 Monitoring Procedures 38 Monitored Outfalls.

8 38 Commingled Discharges. 39 Measurable Storm Events. 39 Sample Type. 39 Adverse Weather Conditions. 39 Climates with Irregular Stormwater Runoff. 40 Monitoring Periods. 40 Monitoring for Allowable Non Stormwater Discharges 40 Parameter Codes for Reports of Monitoring Data 39 Required Monitoring. 41 Benchmark Monitoring. 42 Applicability of Benchmark Monitoring. 42 Benchmark Monitoring Schedule. 42 3 Exception for Inactive and Unstaffed Sites. 44 Effluent Limitations Monitoring. 45 Monitoring Based on Effluent Limitations Guidelines.

9 45 Substantially Identical Outfalls. 45 [Reserved] 45 Discharges to Impaired Waters Monitoring. 45 Permittees Required to Monitor Discharges to Impaired Waters. 46 Impaired Waters Monitoring Schedule. 47 Additional Monitoring Required by the Department. 49 Follow-up Actions if discharge Exceeds Numeric Effluent Limit. 49 Submit an Exceedance Report. 49 Continue to Monitor. 50 7. Reporting and Recordkeeping 50 Reporting Monitoring Data to the Department. 50 [Reserved] 50 Exceedance Report for Numeric Effluent Limits 50 Additional Reporting.

10 51 Recordkeeping. 52 Addresses for Reports 52 8. Sector Specific Requirements 54 8A. Sector A: Timber Products 54 8B. Sector B: Paper and Allied Products 58 8C. Sector C: Chemicals and Allied Products Manufacturing 59 8D. Sector D: Asphalt Paving and Roofing Materials and Lubricant Manufacturing 61 8E. Sector E: Glass, Clay, Cement, Concrete, and Gypsum Products 63 8F. Sector F: Primary Metals 65 8G. Sector G: Metal Mining (Ore Mining and Dressing) 67 8H. Sector H: Coal Mines and Coal Mining Related Facilities 86 8I. Sector I: Oil and Gas Extraction and Refining 86 8J.