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Administrative Record

The documents listed below are included in DHEC's Administrative Record for the assessment and cleanup alternatives evaluated for the Congaree River sediments. These documents include investigation activities, sampling results, work plans, and cost analyses.

Interested persons are encouraged to review these documents to learn more about this site.

 

 

 

 

Date Title Description

January 17, 2017

Letter from SCANA to DHEC

Re:  Viability of Large Sandbags
Summarizes the results of the large one-ton sandbag testing activities completed during the Field Demonstration Project (FDP) conducted by SCE&G.  Includes reasons that the large sandbags were determined to not be a viable option for isolating and dewatering areas for subsequent sediment excavation.

October 31, 2016

Letter from US Army Corps of Engineers (USACOE) to South Carolina Department of Natural Resources Engineers Letter

Correspondence regarding SCE&G’s application for an USACOE permit.  Specifically, the Corps plans to authorize the project under Nationwide Permit 38, Cleanup of Hazardous and Toxic Waste.
September 29, 2016 Letter from SCANA to US Army Corps of Engineers (USACOE)

Re:  Joint Application and Pre-Construction Notification (JA-PCN)
Responses to the initial comments provided by the USACOE regarding the September 22, 2016 submittal of the JA-PCN.

September 22, 2016

Submittal from SCANA to US Army Corps of Engineers (USACOE)

Re:  Joint Application and Pre-Construction Notification – Individual Permit Phase 2 – Modified Removal Action – Sediment Capping Project
SCE&G‘s Joint Federal and State Application for Activities Affecting Waters of the United States or Critical Areas of the State of South Carolina.  Includes documents in support of an Individual Permit Application.

August 16. 2016

Letter from DHEC to SCANA

Re:  SCE&G Congaree River Sediments, Columbia SC
Correspondence requesting that SCE&G pursue Engineering Evaluation/Cost Analysis Alternative 3 – Sediment Capping and Institutional Controls instead of the removal alternative previously envisioned.

July 12, 2016 Submittal from SCANA to DHEC Re:  Field Demonstration Project (FDP) – Documentation Report
SCANA’s Documentation Report on the FDP submitted to DHEC for review and approval.  Includes a detailed description of site preparation activities, permits and approvals, regulatory interactions, subcontractors and the findings of the completed field work in support of the FDP.
September 2, 2015 Submittal from SCANA to DHEC

Re:  Field Demonstration Project Work Plan
DHEC’s approval of the Field Demonstration Project Work Plan.

July 17, 2015

Submittal from SCANA to DHEC

Re:  Field Demonstration Project (FDP) – Work Plan
SCANA’s FDP Work Plan submitted to DHEC for review and approval of a pilot test to try an alternate removal approach by building a temporary dam using sandbags to allow for excavation in the river.

April 30, 2015

Letter from APEX Companies, LLC (SCANA Contractor) to US Army Corps of Engineers (USACOE)

Re:  USACE Permit – P/N 2011-01356-6NO
Update on the evaluation of cofferdam approaches for the Modified Removal Action.

March 2, 2015 Letter from DHEC to SCE&G

Re:  Response to SCANA’s February 18, 2015 Status Update – Removal Action Decision
DHEC approval of SCANA’s request to move forward with design and permitting of the Modified Removal Action approach as described/proposed in SCANA’s February 18, 2015 letter.

February 18, 2015

Letter from SCANA to DHEC

Re:  Status Update – Removal Action Decision
Update regarding the Congaree River Sediment Removal project.  Specifically, the problems and concerns identified during review of the current design via the permitting process with regulatory agencies and how the selected removal action alternative would be implemented.  Includes request that DHEC consider a modified approach for completing the removal action.

May 8, 2013 Letter from DHEC to SCE&G

Re:  SCE&G Huger Street Former MGP, Columbia SC
Correspondence that DHEC is drafting an Action Memorandum to select Alternative 4 as the official remedy selection for the site.  Request for SCE&G to begin the design and permit process.

January 2013 Final Engineering Evaluation/
Cost Analysis (EE/CA)
Summary of cleanup options evaluated by DHEC.
March 2012 Project Delineation Report Summary of all 5 phases of assessment and discussion of results.
September 2011 Phase IV Delineation Preliminary Findings Assessment Report for Phase 5 Proposed Activities.
August 2011 Phase III Delineation Preliminary Findings Assessment Report for Phase 4 Proposed Activities.
June 2011 Phase II Delineation Summary Assessment Report for Phase 3 Proposed Activities.
December 2010 Phase I Delineation Summary Assessment Report for Phase 2 Proposed Activities.
September 2010 Delineation Work Plan Initial Assessment Work Plan to collect sediment samples in the Congaree River.
August 2002 Voluntary Cleanup Contract Agreement between DHEC and South Carolina Electric & Gas for additional assessment and/or remediation at the site of the former Huger Street Manufactured Gas Plant (MGP)