Clean Water Act discharge permit · NPDES SC0038555
RESONAC GRAPHITE AMERICA, INC., Ridgeville, SC: NPDES SC0038555 discharge permit, effluent exceedances, inspections, penalties
- Administratively continuedPermit status
- MajorDischarger class
- 14Pollutants under a numeric limit
- 8Pollutants with an effluent exceedance
RESONAC GRAPHITE AMERICA, INC., held by SHOWA DENKO CARBON INC, holds NPDES permit SC0038555, which discharges to Timothy Ck/4 Hole Sw/Edisto Rv. EPA’s file records it issued December 17, 2008 and expiring July 31, 2013. The status and dates are as EPA’s permit file stood when Velarion loaded it (October 14, 2026); EPA’s free Detailed Facility Report on ECHO carries the permit’s current standing.
Identity
| Facility as filed | RESONAC GRAPHITE AMERICA, INC. |
|---|---|
| Permittee as filed | SHOWA DENKO CARBON INC |
| NPDES ID | SC0038555 |
| Permit status | Administratively continued (past its expiration date and still in force until reissued) |
| Permit type | Individual permit |
| Discharger class | Major discharger |
| Facility type | Not a publicly owned treatment works |
| Issued | December 17, 2008 |
| Expiration date | July 31, 2013 |
| Address | Ridgeville, SC 29472 |
| Receiving water | TIMOTHY CK/4 HOLE SW/EDISTO RV |
| Subwatershed | Halfway Gut Creek-Four Hole Swamp (HUC 030502050311) |
| NAICS | 335991 – Carbon and Graphite Product Manufacturing |
| SIC | 3624 – Carbon And Graphite Products |
| Other EPA IDs (FRS) | RCRA handler SCD980709927; ICIS-AIR source SC00009000025 |
Cited to the EPA ICIS-NPDES permit file (ECHO download) and EPA’s NAICS/SIC and component files, the same download; cross-program IDs from EPA’s FRS facility-registry crosswalk.
Effluent limits and exceedances
- 16Pollutants on file
- 14Under a numeric limit
- 15With a violation of any kind
- 8With an effluent exceedance
An effluent exceedance is a discharge monitoring report value over the permit’s numeric limit (EPA’s violation code E90). A violation of any kind also counts a report not filed. Each row is EPA’s own count for that pollutant.
| Pollutant or measure | Limits | Violations, any kind | Effluent exceedances | Latest exceedance | Largest exceedance, as filed |
|---|---|---|---|---|---|
| BOD, 5-day, 20 deg. C | 6 | 10 | 8 | August 31, 2025 | 119% over the limit |
| Pass/Fail Static Renewal 7 Day Chronic Ceriodaphnia dubia | 1 | 8 | 4 | December 31, 2022 | |
| Solids, total suspended | 6 | 5 | 3 | May 31, 2023 | 100% over the limit |
| Oxygen, dissolved [DO] | 1 | 3 | 2 | June 30, 2025 | 19% over the limit |
| Zinc, total [as Zn] | 2 | 2 | 2 | February 29, 2012 | 68% over the limit |
| Oil & Grease | 4 | 3 | 1 | January 31, 2022 | 12% over the limit |
| Length of longest pH excursion | 1 | 1 | 1 | July 31, 2007 | 545% over the limit |
| % of time exceeding pH limits | 1 | 1 | 1 | June 30, 2006 | 18% over the limit |
| Chlorine, total residual | 2 | 4 | 0 | ||
| Hardness, total [as CaCO3] | 0 | 4 | 0 | ||
| pH | 4 | 2 | 0 | ||
| Flow, in conduit or thru treatment plant | 4 | 2 | 0 | ||
| Mercury, total [as Hg] | 2 | 2 | 0 | ||
| E. coli | 0 | 2 | 0 | ||
| Temperature, water deg. fahrenheit | 1 | 1 | 0 | ||
| Coliform, fecal general | 2 | 0 | 0 |
Cited to the EPA ICIS-NPDES limits and effluent violations files (ECHO download); up to 60 rows shown, most exceedances first.
Inspections, violations and enforcement
- 2Single-event violations
| Date | What EPA recorded | Agency |
|---|---|---|
| March 8, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
| March 3, 2021 | Reporting Violations - Improper/ Incorrect Reporting | ST6 |
Velarion’s copy of EPA’s ICIS-NPDES files does not include the inspections, formal enforcement actions and informal enforcement actions files, so this page shows none of them. EPA’s free Detailed Facility Report on ECHO lists this permit’s inspections, enforcement actions and penalties.
Cited to the EPA ICIS-NPDES violation, inspection and enforcement files (ECHO download); up to 50 rows of each shown, newest first.
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Nearby on the register
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- Every permit record in Ridgeville, A to Z
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- Every permit record in South Carolina, A to Z
Figures from EPA’s ICIS-NPDES download, loaded October 14, 2026.