Document ID: EPA-HQ-SFUND-2005-0011-0032
Agency: epa
Document Type: Rule
Title: National Oil and Hazardous Substances Pollution Contingency Plan: National Priorities List; Eau Claire Municipal Well Field Superfund Site; Deletion
Posted Date: 2014-03-28T04:00Z

[Federal Register Volume 79, Number 60 (Friday, March 28, 2014)]
[Rules and Regulations]
[Pages 17441-17445]
From the Federal Register Online via the Government Printing Office [www.gpo.gov]
[FR Doc No: 2014-06817]

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 300

[EPA-HQ-SFUND-2005-0011; FRL-9908-65-Region 5]

National Oil and Hazardous Substance Pollution Contingency Plan; 
National Priorities List: Deletion of the Eau Claire Municipal Well 
Field Superfund Site

AGENCY: Environmental Protection Agency.

ACTION: Direct final rule.

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SUMMARY: The U.S. Environmental Protection Agency (EPA) Region 5 is 
publishing a direct final notice of deletion of the Eau Claire 
Municipal Well Field Superfund Site (Site) located in Eau Claire, 
Wisconsin, from the National Priorities List (NPL). The NPL, 
promulgated pursuant to Section 105 of the Comprehensive Environmental 
Response, Compensation, and Liability Act (CERCLA) of 1980, as amended, 
is an appendix to the National Oil and Hazardous Substances Pollution 
Contingency Plan (NCP). This direct final deletion is being published 
by EPA with the concurrence of the State of Wisconsin, through the 
Wisconsin Department of Natural Resources (WDNR), because EPA has 
determined that all appropriate response actions under CERCLA have been 
completed. However, this deletion does not preclude future actions 
under Superfund.

DATES: This direct final deletion is effective May 27, 2014 unless EPA 
receives adverse comments by April 28, 2014. If adverse comments are 
received, EPA will publish a timely withdrawal of the direct final 
deletion in the Federal Register informing the public that the deletion 
will not take effect.

ADDRESSES: Submit your comments, identified by Docket ID no. EPA-HQ-
SFUND-2005-0011, by one of the following methods:
     http://www.regulations.gov. Follow online instructions for 
submitting comments.
     Email: Howard Caine, Remedial Project Manager, at 
howard.caine@epa.gov or Susan Pastor, Community Involvement 
Coordinator, at pastor.susan@epa.gov.
     Fax: Gladys Beard, NPL Deletion Process Manager at (312) 
886-4071.
     Mail: Howard Caine, Remedial Project Manager, U.S. 
Environmental Protection Agency (SR-6J), 77 West Jackson Boulevard, 
Chicago, IL 60604, (312) 353-9685, or Susan Pastor, Community 
Involvement Coordinator, U.S. Environmental Protection Agency (SI-7J), 
77 West Jackson Boulevard, Chicago, IL 60604, (312) 353-1325 or (800) 
621-8431.
     Hand delivery: Susan Pastor, Community Involvement 
Coordinator, U.S. Environmental Protection Agency (SI-7J), 77 West 
Jackson Boulevard, Chicago, IL 60604. Such deliveries are only accepted 
during the docket's normal hours of operation, and special arrangements 
should be made for deliveries of boxed information. The normal business 
hours are Monday through Friday, 8:30 a.m. to 4:30 p.m. CST, excluding 
federal holidays.
    Instructions: Direct your comments to Docket ID no. EPA-HQ-SFUND-
2005-0011. EPA's policy is that all comments received will be included 
in the public docket without change and may be made available online at 
http://www.regulations.gov, including any personal information 
provided, unless the comment includes information claimed to be 
Confidential Business Information (CBI) or other information whose 
disclosure is restricted by statute. Do not submit information that you 
consider to be CBI or otherwise protected through http://www.regulations.gov or email. The http://www.regulations.gov Web site 
is an ``anonymous access'' system, which means EPA will not know your 
identity or contact information unless you provide it in the body of 
your comment. If you send an email comment directly to EPA without 
going through http://www.regulations.gov, your email address will be 
automatically captured and included as part of the comment that is 
placed in the public docket and made available on the Internet. If you 
submit an electronic comment, EPA recommends that you include your name 
and other contact information in the body of your comment and with any 
disk or CD-ROM you submit. If EPA cannot read your comment due to 
technical difficulties and cannot contact you for clarification, EPA 
may not be able to consider your comment.

[[Page 17442]]

Electronic files should avoid the use of special characters, any form 
of encryption, and be free of any defects or viruses.
    Docket: All documents in the docket are listed in the http://www.regulations.gov index. Although listed in the index, some 
information may not be publicly available, e.g., CBI or other 
information whose disclosure is restricted by statute. Certain other 
material, such as copyrighted material, will be publicly available only 
in the hard copy. Publicly available docket materials are available 
either electronically at http://www.regulations.gov or in hard copy at:

     U.S. Environmental Protection Agency-Region 5, 77 West 
Jackson Boulevard, Chicago, IL 60604, Phone: (312) 353-1063.
    Hours: Monday through Friday, 8:30 a.m. to 4:30 p.m. CST, excluding 
federal holidays.
     L.E. Phillips Memorial Public Library, 400 Eau Claire St., 
Eau Claire, WI 54701. Phone: (715) 839-5004.

    Hours: Monday through Thursday, 10:00 a.m. to 9: 00 p.m., Friday 
10:00 a.m. to 6:00 p.m., Saturday 10:00 a.m. to 5:00 p.m., Sunday 1:00 
p.m. to 5:00 p.m. However, the library is closed every Sunday from May 
26-September 1.

FOR FURTHER INFORMATION CONTACT: Howard Caine, Remedial Project 
Manager, U.S. Environmental Protection Agency (SR-6J), 77 West Jackson 
Boulevard, Chicago, IL 60604, (312) 886-5787, or caine.howard@epa.gov.

SUPPLEMENTARY INFORMATION: 

Table of Contents

I. Introduction
II. NPL Deletion Criteria
III. Deletion Procedures
IV. Basis for Site Deletion
V. Deletion Action

I. Introduction

    EPA Region 5 is publishing this Direct Final Notice of Deletion of 
the Eau Claire Municipal Well Field Superfund Site from the National 
Priorities List (NPL) and requests public comments on this proposed 
action. The NPL constitutes Appendix B of 40 CFR part 300, which is the 
National Oil and Hazardous Substances Pollution Contingency Plan (NCP), 
which EPA promulgated pursuant to Section 105 of the Comprehensive 
Environmental Response, Compensation and Liability Act (CERCLA) of 
1980, as amended. EPA maintains the NPL as the list of sites that 
appear to present a significant risk to public health, welfare, or the 
environment. Sites on the NPL may be the subject of remedial actions 
financed by the Hazardous Substance Superfund (Fund). This deletion of 
the Eau Claire Municipal Well Field Superfund Site is proposed in 
accordance with 40 CFR 300.425(e) and is consistent with the Notice of 
Policy Change: Deletion of Sites on the National Priorities List, (49 
FR 37070), 09/21/1984. As described in 300.425(e) (3) of the NCP, sites 
deleted from the NPL remain eligible for Fund-financed remedial actions 
if future conditions warrant such actions.
    Because EPA considers this action to be noncontroversial and 
routine, this action will be effective May 27, 2014 unless EPA receives 
adverse comments by April 28, 2014. Along with this Direct Final Notice 
of Deletion, EPA is co-publishing a Notice of Intent to Delete in the 
``Proposed Rules'' section of the Federal Register. If adverse comments 
are received within the 30-day public comment period on this deletion 
action, EPA will publish a timely withdrawal of this direct final 
Notice of Deletion before the effective date of the deletion, and the 
deletion will not take effect. EPA will, as appropriate, prepare a 
response to comments and continue with the deletion process on the 
basis of the Notice of Intent to Delete and the comments already 
received. There will be no additional opportunity to comment.
    Section II of this document explains the criteria for deleting 
sites from the NPL. Section III discusses procedures that EPA is using 
for this action. Section IV discusses the Eau Claire Municipal Well 
Field Site and demonstrates how it meets the deletion criteria. Section 
V discusses EPA's action to delete the site from the NPL unless adverse 
comments are received during the public comment period.

II. NPL Deletion Criteria

    The NCP establishes the criteria that EPA uses to delete sites from 
the NPL. In accordance with 40 CFR 300.425(e), sites may be deleted 
from the NPL where no further response is appropriate. In making such a 
determination pursuant to 40 CFR 300.425(e), EPA will consider, in 
consultation with the State, whether any of the following criteria have 
been met:
    i. Responsible parties or other persons have implemented all 
appropriate response actions required;
    ii. All appropriate Fund-financed response under CERCLA has been 
implemented, and no further response action by responsible parties is 
appropriate; or
    iii. The remedial investigation has shown that the release poses no 
significant threat to public health or the environment and, therefore, 
the taking of remedial measures is not appropriate.
    Pursuant to CERCLA Section 121(c) and the NCP, EPA conducts five-
year reviews to ensure the continued protectiveness of remedial actions 
where hazardous substances, pollutants, or contaminants remain at a 
site above levels that allow for unlimited use and unrestricted 
exposure. EPA may conduct such five-year reviews even if a site is 
deleted from the NPL. EPA may initiate further action to ensure 
continued protectiveness at a deleted site if new information becomes 
available that indicates it is appropriate. Whenever there is a 
significant release from a site deleted from the NPL, the deleted site 
may be restored to the NPL without application of the hazard ranking 
system.

III. Deletion Procedures

    The following procedures apply to deletion of the Eau Claire 
Municipal Well Field Site:
    (1) EPA consulted with the State of Wisconsin prior to developing 
this direct final Notice of Deletion and the Notice of Intent to Delete 
co-published today in the ``Proposed Rules'' section of the Federal 
Register.
    (2) EPA has provided the State thirty (30) working days for review 
of this notice and the parallel Notice of Intent to Delete prior to 
their publication today, and the State, through the WDNR, has concurred 
on the deletion of the Site from the NPL.
    (3) Concurrently with the publication of this direct final Notice 
of Deletion, a notice of the availability of the parallel Notice of 
Intent to Delete is being published in a major local newspaper, ``Eau 
Claire Leader Telegram''. The newspaper notice announces the 30-day 
public comment period concerning the Notice of Intent to Delete the 
Site from the NPL.
    (4) EPA placed copies of documents supporting the proposed deletion 
in the deletion docket and made these items available for public 
inspection and copying at the Site information repositories identified 
above.
    (5) If adverse comments are received within the 30-day public 
comment period on this deletion action, EPA will publish a timely 
notice of withdrawal of this direct final Notice of Deletion before its 
effective date and will prepare a response to comments and continue 
with the deletion process on the basis of the Notice of Intent to 
Delete and the comments already received.
    Deletion of a site from the NPL does not itself create, alter, or 
revoke any individual's rights or obligations. Deletion of a site from 
the NPL does not

[[Page 17443]]

in any way alter EPA's right to take enforcement actions, as 
appropriate. The NPL is designed primarily for informational purposes 
and to assist EPA management. Section 300.425(e)(3) of the NCP states 
that the deletion of a site from the NPL does not preclude eligibility 
for future response actions, should future conditions warrant such 
actions.

IV. Basis for Site Deletion

    The following information provides EPA's rationale for deleting the 
Eau Claire Municipal Well Field Superfund Site from the NPL.

Site Background and History

    The Eau Claire Municipal Well Field (ECMWF) site (CERCLIS ID: 
WID980820054) is located in Chippewa County in the Chippewa River 
Valley, east of the Chippewa River and approximately 2.5 miles west of 
the National Presto Industries (NPI) site. The ECMWF site consists of 
15 municipal groundwater wells in two adjoining well fields (five in 
the north well field and ten in the south) that provide drinking water 
to approximately 60,000 residential and commercial users. All municipal 
wells are installed in the glacial outwash sand and gravel aquifer. In 
addition to these municipal wells, a number of private wells previously 
drew drinking water from this sand and gravel aquifer. The sand and 
gravel aquifer is hydraulically connected to an underlying sandstone 
aquifer, which is not used extensively in the area due to its low 
hydraulic conductivity and the water's poor aesthetic qualities. The 
well field is about a mile long and trends generally in a north-south 
direction. The ECMWF site has been used as a well field by the city for 
over the past 70 years. According to city personnel, prior to that time 
it was forested land. Current land use in the surrounding area is 
primarily residential, with a small park to the south and the Eau 
Claire airport located about one-quarter mile east of the northern 
portion of the city well field. It is anticipated that these land uses 
will continue into the foreseeable future.
    In March 1981, as part of the U.S. EPA Groundwater Supply Survey, 
the WDNR tested the Eau Claire municipal water supply for volatile 
organic compounds (VOCs). Trichloroethene (TCE), 1,1-dichloroethene 
(1,1-DCE), 1,1-dichloroethane (1,1-DCA), and 1,1,1-trichloroethane 
(1,1,1-TCA) were detected in samples collected from the north well 
field. The WDNR informed the city of Eau Claire that the concentrations 
for each of the VOCs detected were below Wisconsin groundwater 
standards. In addition to monitoring individual municipal production 
wells, the city began testing private residential wells located 
immediately northeast of the well field. VOCs were subsequently 
detected in several of the residential wells sampled at levels above 
Wisconsin groundwater standards.

Remedial Investigation and Feasibility Study

    EPA initiated a Remedial Investigation/Feasibility Study (RI/FS) at 
the ECMWF site in October 1984. Based on groundwater monitoring data 
from private wells and monitoring wells installed as part of the field 
investigation, the ECMWF RI identified two distinct plumes of 
contamination at the site, separated by a gap of approximately 1,700 
feet at the Eau Claire County Airport. The ECMWF RI did not confirm the 
source of the groundwater contamination at the well field but suggested 
that the nearby National Presto Industries (NPI) property (which later 
became a Superfund site) could be a potential source of the groundwater 
contamination at the ECMWF site. Data generated during the NPI RI 
clearly established that waste disposal areas at the NPI site were the 
source of TCE contamination at the ECMWF site, and indeed, continued to 
release contaminants to groundwater. A separate action was taken at NPI 
and cleanup at the NPI site is still ongoing.

Record of Decision Findings

    On June 10, 1985, EPA issued a Record of Decision (ROD) that 
selected a packed column air stripper as an Initial Remedial Measure 
(IRM) to address contamination at the ECMWF site. During the first 
month of operation (August 1987), influent to the air strippers was 
sampled and analyzed weekly for VOCs. Influent and effluent have been 
tested monthly thereafter. Influent and effluent samples are analyzed 
for VOCs according to modified Method 601 of 40 CFR part 136 by the 
city of Eau Claire.
    Following the completion of the RI/FS, EPA issued the final ROD for 
the ECMWF site on March 31, 1988. The major components of the selected 
remedy were:
     Continued treatment of contaminated municipal water with 
the air stripper constructed as the IRM;
     provision of municipal water from the city of Eau Claire 
to private well users within or near the two plumes of groundwater 
contamination identified during the RI;
     installation of groundwater extraction wells in one of the 
two plumes of contamination; and
     discharge of untreated groundwater from extraction wells 
to the Chippewa River. WDNR concurred with the remedy selected by EPA 
for the ECMWF site. The remedies for the ECMWF site were developed to 
meet the following Remedial Action Objectives (RAOs):
     Prevent human ingestion of contaminated groundwater,
     Prevent inhalation of contaminants from the groundwater, 
and
     Restore the contaminated aquifer to water quality 
objectives that are protective of beneficial use within a reasonable 
timeframe.

Explanation of Significant Differences

    After EPA issued the ECMWF site final ROD, WDNR determined that the 
discharge of untreated groundwater from the proposed extraction wells 
into the Chippewa River would not comply with Wisconsin Statute, 
Chapter 283, Pollution Discharge Elimination. As a result, two of the 
components of the ECMWF site remedy, installation of extraction wells 
and the discharge of untreated water, were never fully implemented. The 
lack of extraction wells, however, did not fundamentally alter the 
selected ECMWF remedy. EPA issued an Explanation of Significant 
Differences (ESD) in 2008 to document that these measures were not 
implemented and would not be implemented in the future.
    The 1988 ROD states that ``EPA will clean up the groundwater to 
non-detect for these compounds and continue to pump and treat for a 
period of time beyond the non-detect to assure that the target compound 
limits (TCLs) have been reached.'' The target cumulative carcinogenic 
risk for the site was set at 1 x 10-6 excess lifetime cancer 
risk (ELCR) and apportioned across several of the site's VOC 
groundwater contaminants. In order to provide the desired 
protectiveness, the TCLs needed to be lower than federal drinking water 
standards (maximum contaminant levels (MCLs) under the Safe Drinking 
Water Act (SDWA)).
    EPA and WDNR reviewed the cleanup goals upon conclusion of the 2007 
Five-Year Review. The 1988 ROD had developed TCLs as groundwater 
cleanup goals at the ECMWF site. However, in 1985 Wisconsin had 
promulgated Groundwater Quality regulations in the Wisconsin 
Administrative Code (WAC), Chapter 140 (NR 140). An ESD was signed on 
December 23, 2009, to update the groundwater cleanup goals to 
incorporate NR 140. NR 140 provides

[[Page 17444]]

two types of standards that are to be followed. One is the Preventive 
Action Limits (PALs) and the other is the Enforcement Standards (ES). 
WDNR concurred with the ESD which adopted enforcement standards as the 
groundwater cleanup goal.

Construction Activities

    On behalf of EPA, the U.S. Army Corps of Engineers completed 
construction of the air stripper in June 1987 and the system became 
operational in August 1987. The city of Eau Claire operates the air 
stripper as a part of its drinking water distribution operations. The 
air stripper has been in constant operation since completion of the 
interim remedial action in 1987. A permanent municipal water supply has 
been provided to affected private well owners in the city of Eau 
Claire, and a permanent municipal water supply was constructed and is 
operating in the Town of Hallie which provides its residents with 
drinking water.
    On April 25, 1989, EPA issued a Section 106 Administrative Order to 
the NPI PRPs to execute remedial action tasks consistent with the ECMWF 
final ROD and the data generated in the NPI RI. These activities 
included implementation of a temporary bottled water distribution 
program for those in the affected area in and adjacent to the redefined 
Plume 2. NPI was also required to conduct a Phased Feasibility Study 
(PFS) to identify and reevaluate options for a permanent alternate 
drinking water supply for the affected area. To ensure consistency with 
the ECMWF final ROD, bottled water was to be made available to all 
private well users in the affected area until a permanent and 
uncontaminated drinking water supply was fully implemented and 
operational.
    On August 1, 1990, EPA issued a ROD for the NPI site selecting a 
permanent drinking water supply for the affected area in and around the 
redefined Plume 2. Under this ROD, the city of Eau Claire would extend 
its municipal service to those portions of the affected area which had 
been annexed to the city. The remaining portions of the affected area 
were to be serviced by a newly created Hallie Sanitary District 
(District).
    The city of Eau Claire hookups were completed by November 1991. The 
first service connections to the District were completed in December 
1991 and by mid-summer 1992 the District was fully operational and 
servicing the affected area within the Town of Hallie.
    EPA conducted a pre-certification inspection of the District on 
August 19, 1992. Upon completion of the certification process by the 
Agency and satisfaction of the terms of the Administrative Order, the 
District assumed full control and responsibility, including operation 
and maintenance, of its drinking water system.
    Remediation of off-site groundwater, including Plume 1-2 which 
migrated from the NPI site to the ECMWF site, was addressed in the 
final FS for the NPI site in conjunction with remediation of on-site 
source areas in the southwest corner of the NPI site. NPI also 
implemented an interim action for on-site plume containment pursuant to 
a third Section 106 Administrative Order issued to NPI on July 2, 1992. 
This action was designed to be consistent with the final cleanup action 
for the NPI site by preventing the off-site movement of contaminated 
groundwater through extraction and treatment. This alternative was 
selected in an Interim Action ROD issued for the NPI site by EPA on 
September 30, 1992.
    The city of Eau Claire has annexed and extended municipal water 
service to private well owners in the area that could have been subject 
to impacts from the contaminated groundwater originating from the NPI 
site. NPI paid for the construction of two air stripping towers at the 
ECMWF and continues to pay for their operation. The purpose of the 
towers is to remove the very low concentrations, even below federal 
drinking water standards, of volatile organic compounds in the 
groundwater withdrawn by the city wells and to ensure a safe drinking 
water supply for the city. These engineered controls appear to be 
effective in their goal of protecting human health and the environment.

Institutional Controls

    Institutional Controls (ICs) were required at the ECMWF site in 
order to ensure the protectiveness of the remedy. ICs are non-
engineered instruments, such as administrative and/or legal controls, 
that help minimize the potential for exposure to contamination and 
protect the integrity of the remedy. Compliance with ICs is required to 
assure long-term protectiveness for any areas that do not allow for 
unlimited use or unrestricted exposure (UU/UE).
    The ROD for the ECMWF site did not identify the need for ICs. 
However, the 1996 ROD for NPI acknowledges that ICs are required to 
ensure protectiveness of the final site-wide remedy until Plume 1-2, 
which impacts the ECMWF, meets the groundwater cleanup goals. 
Residences in the affected area who have received municipal water are 
still allowed to use private wells for other purposes, such as 
irrigation and car washing as long as there is no connection to indoor 
plumbing. To use these private wells, property owners must submit 
applications for annual permits to either the City of Eau Claire's 
Health Department or the Hallie Sanitary District.
    The City of Eau Claire (City), Village of Lake Hallie (formerly 
known as the Town of Hallie), and Chippewa County have all passed 
ordinances to protect citizens from impacted groundwater. The City has 
an ordinance that bans cross connections between private water supply 
wells and the municipal supply. The City has also annexed properties 
that are within and near the identified boundaries of the NPI plume(s) 
in Chippewa County and provided those properties with municipal water. 
The City recently enacted an ordinance that restricts the construction 
of new private water supply wells within the City, as well as requiring 
the abandonment of existing supply wells. The WDNR has promulgated 
Chapters NR 809 and NR 811 of the Wisconsin Administrative Code, which 
regulate safe drinking water and the design and operation of municipal 
water systems, respectively. The key part of this code, as it pertains 
to ECMWF site, is its prohibition against cross connections and its 
requirement of adequate separation of potable wells from sources of 
contamination.
    The ordinances and administrative codes enacted by the local 
municipalities, counties, and the state provide a strong and effective 
framework for protection of the local citizens against consumption of 
contaminated groundwater from NPI and ECMWF until the cleanup goals are 
attained in all plumes.

Cleanup Goals

    Recent data indicates that the levels of TCE in Plume 1-2 have 
declined and are meeting the Wisconsin enforcement standard of 5 ppb, 
except for 5 groundwater monitoring wells associated with the NPI site, 
which exceed the enforcement standard. One of these groundwater 
monitoring wells is located on the NPI site property and is 
significantly above the enforcement standard; two groundwater 
monitoring wells are west of the NPI site along North Hastings Way and 
measures TCE between 5-6 ppb; and two groundwater monitoring wells 
located at and near the airport measure TCE between 5-6 ppb.
    Groundwater monitoring wells on the ECMWF site, as well as the 
production wells, all show TCE below the enforcement standard of 5 ppb. 
A review of the monthly production well data by ECMWF for wells 10, 11, 
15, 16, 17 and 19 shows that the TCE has not been detected except for 
well 19. This

[[Page 17445]]

well does detect TCE consistently, but it is below the enforcement 
standard of 5 ppb. The blended production well water entering the air 
stripper is non-detect for any VOCs. The detection limit used by the 
city in its analyses is 0.7 ppb TCE. As a result, the implemented 
remedy at the ECMWF site has achieved the degree of cleanup as 
specified in the decision documents for all pathways of exposure.

Operation and Maintenance

    Operation and maintenance (O&M) requirements outlined in the O&M 
Plan for the IRM were: (1) Routine maintenance of the air stripper as 
described in the manufacturer's manual; and (2) sampling and analysis 
requirements of stripper influent and effluent, as previously 
discussed. TCE, 1,1-DCE, 1,1-DCA, 1,1,1-TCA and tetrachloroethene (PCE) 
are monitored regularly by the city of Eau Claire to ensure compliance 
with Wisconsin Enforcement Standards and the Safe Drinking Water Act 
Maximum Contaminant Limits (MCLs) for drinking water.

Five-Year Review

    EPA conducted four five-year reviews at this site; the last report 
was dated July 17, 2012. EPA, in consultation with the Wisconsin 
Department of Natural Resources (WDNR), determined that the cleanup 
remedy at the ECMWF site is protective of human health and the 
environment because cleanup standards have been met at the site. 
Additionally, exposure pathways from the NPI site that could result in 
unacceptable risks are being controlled through the use of ICs. EPA has 
also determined that the air strippers at ECMWF can be taken off-line 
as the groundwater entering the city's well field has met the cleanup 
standards for over 5 years and is not expected to exceed the standards 
in the future. The city of Eau Claire has chosen to keep the air 
strippers on-line in the short term, although they may turn off the air 
strippers at a future date. Since unlimited use/unrestricted exposure 
has been met at the ECMWF site, future five-year reviews are not 
required.

Community Involvement

    Public participation activities have been satisfied as required in 
CERCLA Section 113(k), 42 U.S.C. 9613(k), and CERCLA section 117, 42 
U.S.C. 9617. Documents in the deletion docket which EPA relied on for 
recommendation of the deletion of this site from the NPL are available 
to the public in the information repositories and at 
www.regulations.gov.

Determination That the Site Meets the Criteria for Deletion in the NCP

    The NCP (40 CFR 300.425(e)) states that a site may be deleted from 
the NPL when no further response action is appropriate. EPA, in 
consultation with the State of Wisconsin, has determined that all 
required response actions have been implemented and no further response 
action by the responsible parties is appropriate.

V. Deletion Action

    EPA, with concurrence from the State of Wisconsin through the WDNR, 
has determined that all appropriate response actions under CERCLA have 
been completed. Therefore, EPA is deleting the Site from the NPL.
    Because EPA considers this action to be noncontroversial and 
routine, EPA is taking it without prior publication. This action will 
be effective May 27, 2014 unless EPA receives adverse comments by April 
28, 2014. If adverse comments are received during the comment period, 
EPA will publish a timely withdrawal of this direct final Notice of 
Deletion before the effective date of the deletion, and it will not 
take effect. EPA will prepare a response to comments and continue with 
the deletion process on the basis of the notice of intent to delete and 
the comments already received. There will be no additional opportunity 
to comment.

List of Subjects in 40 CFR Part 300

    Environmental protection, Air pollution control, Chemicals, 
Hazardous substances, Hazardous waste, Intergovernmental relations, 
Penalties, Radiation protection, Reporting and recordkeeping 
requirements, Superfund, Water pollution control, Water supply.

    Dated: March 3, 2014.
Susan Hedman,
Regional Administrator, Region 5.

    For the reasons set out in this document, 40 CFR part 300 is 
amended as follows:

PART 300--[AMENDED]

0
1. The authority citation for part 300 continues to read as follows:

    Authority: 33 U.S.C. 1321(c)(2); 42 U.S.C. 9601-9657; E.O. 
12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; E.O. 12580, 52 FR 
2923, 3 CFR, 1987 Comp., p. 193.

Appendix B to Part 300--[Amended]

0
2. Table 1 of Appendix B to part 300 is amended by removing the entry 
for ``WI'', ``Eau Claire Municipal Well Field'', ``Eau Claire''.

[FR Doc. 2014-06817 Filed 3-27-14; 8:45 am]
BILLING CODE 6560-50-P