Prepared for

United States Environmental Protection Agency 

Region 6

EXPLANATION OF SIGNIFICANT DIFFERENCES

for

RUSTON FOUNDRY SUPERFUND SITE

EPA ID No. LAD985185107

GS09K99BHD0010

Task Order No. T0703BG1026

Katrina Coltrain

Remedial Project Manager

U.S. EPA Region 6

Prepared by

Science Applications International Corporation

555 Republic Drive, Suite 300

Plano, TX 75074

January 7, 2008

000047
1

PREAMBLE

The purpose of this document is to provide the public with an index to the Administrative

Record File (AR File) for the U.S. Environmental Protection Agency’s (EPA) selected remedial

action to respond to conditions at the Ruston Foundry Superfund Site (the “Site”). EPA’s action is

authorized by the Comprehensive Environmental Response, Compensation, and Liability Act

(CERCLA), 42 U.S.C. Section 9601 et seq. 

Section 113 (j)(1) of CERCLA, 42 U.S.C. Section 9613 (j)(1), provides that judicial review

of the adequacy of a CERCLA response action shall be limited to the Administrative Record (AR).

Section 113 (k)(1) of CERCLA, 42 U.S.C. Section 9613 (k)(1), requires the EPA to establish an AR

upon which it shall base the selection of its remedial actions. As the EPA decides what to do at the

site of a release of hazardous substances, it compiles documents concerning the site and it’s decision

into an “AR File.” This means that documents may be added to the AR File from time to time.

After the EPA Regional Administrator or the Administrator’s delegate signs the Action

Memorandum or the Record of Decision memorializing the selection of the action, the documents

which form the basis for the selection of the response action are then known as the Administrative

Record “AR.”

Section 113(k)(1) of CERCLA requires the EPA to make the AR File available to the public

at or near the site of the response action. Accordingly, the EPA has established a repository where

the AR File may be reviewed near the Site at:

Rapides Public Library

411 Washington Street

Alexandria, Louisiana 71301

Contact: Steve Rogge

Telephone: (318) 442-1840 ext 238

and 

Louisiana Department of Environmental Quality

Public Records Center, Galvez Building, Rm 127

602 N. Fifth Street

Baton Rouge, Louisiana 70802

Telephone: (225) 219-3168

Fax: (225) 219-3175

E-mail: publicrecords@la.gov or visit

http://www.deq.state.la.us/pubrecords 

The public also may review the AR File at the EPA Region 6 office in Dallas, Texas, by

contacting the Remedial Project Manager at the address listed below. The AR File is available for

public review during normal business hours. The AR File is treated as a non-circulating reference

document. Any document in the AR File may be photocopied according to the procedures used at

the repository or at the EPA Region 6 office. This index and the AR File were compiled in

accordance with the EPA’s Final Guidance on Administrative Records for Selecting CERCLA

Response Actions, Office of Solid Waste and Emergency Response (OSWER) Directive Number

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2

9833.3A1 (December 3, 1990). 

Documents listed as bibliographic sources for other documents in the AR File might not be

listed separately in the index. Where a document is listed in the index but not located among the

documents which the EPA has made available in the repository, the EPA may, upon request, include

the document in the repository or make the document available for review at an alternate location.

This applies to documents such as verified sampling data, chain of custody forms, guidance and

policy documents, as well as voluminous site-specific reports. It does not apply to documents in

EPA’s confidential file. (Copies of guidance documents also can be obtained by calling the

RCRA/Superfund/Title 3 Hotline at 

(800) 424-9346.) 

 These requests should be addressed to:

Katrina Coltrain

Remedial Project Manager

U.S. EPA Region 6

1445 Ross Avenue

Dallas, Texas 75202-2733

(214) 665-8143

The EPA response selection guidance compendium index has not been updated since

March 22, 1991 (see CERCLA Administrative Records: First Update of the Compendium of

Documents Used for Selecting CERCLA Response Actions [March 22, 1991]); accordingly, it is not

included here. Moreover, based on resource considerations, the Region 6 Superfund Division

Director has decided not to maintain a Region 6 compendium of response selection guidance.

Instead, consistent with 40 CFR Section 300.805(a)(2) and 300.810(a)(2) and OSWER Directive No.

9833.3A-1 (page 37), the AR File Index includes listings of all guidance documents which may form

a basis for the selection of the response action in question.

The documents included in the AR File index are arranged predominantly in chronological

order. The AR File index helps locate and retrieve documents in the file. It also provides an

overview of the response action history. The index includes the following information for each

document:

• Doc ID- The document identifier number.

• Date - The date the document was published and/or released. “01/01/2525" means no

date was recorded.

• Pages - Total number of printed pages in the document, including attachments.

• Title - Descriptive heading of the document.

• Document Type - General identification, (e.g. correspondence, Remedial Investigation

Report, Record of Decision.)

• Author - Name of originator, and the name of the organization that the author is

affiliated with. If either the originator name or the organization name is not identified,

then the field is captured with the letters “N/A”.

• Addressee- Name and affiliation of the addressee. If either the originator name or the

organization name is not identified, then the field is captured with the letters “N/A”.

000049
EXPLANATION OF SIGNIFICANT DIFFERENCES (ESD) INDEX

01/08/2008

Site Name:

CERCLIS:

OUID:

SSID:

Action:

RUSTON FOUNDRY

LAD985185107

NONE

1F

ESD

Region Id: 06

Docid: 176258

Bates: 000001 To: 000011

Date: 10/12/2004

Pages: 11

Title: FINAL ESD ADMINISTRATIVE RECORD INDEX

Doc Type: INDEX

Name Organization

Author: NONE, SCIENCE APPLICATIONS INTERNATIONAL 

CORPORATION

Name Organization

Addressee: COLTRAIN, KATRINA U.S. ENVIRONMENTAL PROTECTION AGENCY

Region Id: 06

Docid: 824246

Bates: 000012 To: 000015

Date: 09/13/2007

Pages: 4

[EXPLANATION OF SIGNIFICANT DIFFERENCES TREATABILITY STUDY FOR RUSTON 

FOUNDRY]

Title:

Doc Type: CORRESPONDENCE

ELECTRONIC RECORD

Name Organization

Author: CULLEY, CHESTER A KANSAS CITY SOUTHERN RAILWAY COMPANY

Name Organization

Addressee: COLTRAIN, KATRINA U.S. ENVIRONMENTAL PROTECTION AGENCY

Region Id: 06

Docid: 824577

Bates: 000016 To: 000036

Date: 01/02/2008

Pages: 21

EXPLANATION OF SIGNIFICANT DIFFERENCES CONTINGENCY REMEDY FOR RUSTON 

FOUNDRY SUPERFUND SITE

Title:

Doc Type: REPORT / STUDY

ELECTRONIC RECORD

Name Organization

Author: NONE, U.S. ENVIRONMENTAL PROTECTION AGENCY

Name Organization

Addressee: NONE, NONE

Region Id: 06

01/08/2008 Page 1 of 2

000050
EXPLANATION OF SIGNIFICANT DIFFERENCES (ESD) INDEX

01/08/2008

Site Name:

CERCLIS:

OUID:

SSID:

Action:

RUSTON FOUNDRY

LAD985185107

NONE

1F

ESD

Region Id: 06

Docid: 824578

Bates: 000037 To: 000037

Date: 01/03/2008

Pages: 1

[RUSTON FOUNDRY SUPERFUND SITE PUBLIC NOTICE U.S. EPA ISSUES AN EXPLANATION 

OF SIGNIFICANT DIFFERENCES]

Title:

Doc Type: NOTICE

ELECTRONIC RECORD

Name Organization

Author: NONE, U.S. ENVIRONMENTAL PROTECTION AGENCY

Name Organization

Addressee: NONE, NONE

Region Id: 06

Docid: 824579

Bates: 000038 To: 000038

Date: 01/04/2008

Pages: 1

[LOUISIANA DEPARTMENT OF ENVIRONMENTAL QUALITY HAS NO COMMENTS ON THE 

DRAFTS AND FINAL VERSION OF THE EXPLANATION OF SIGNIFICANT DIFFERENCES FOR 

THE RUSTON FOUNDRY SITE]

Title:

Doc Type: CORRESPONDENCE

ELECTRONIC RECORD

Name Organization

Author: CASANOVA, KEITH L LOUISIANA DEPARTMENT OF ENVIRONMENTAL 

QUALITY

Name Organization

Addressee: HEPOLA, JOHN R U.S. ENVIRONMENTAL PROTECTION AGENCY

Region Id: 06

01/08/2008 Page 2 of 2

000051