

[Federal Register: May 25, 2007 (Volume 72, Number 101)]
[Rules and Regulations]               
[Page 29276-29277]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr25my07-12]                         

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 300

[EPA-HQ-SFUND-1989-0011; FRL-8317-5]

 
National Oil and Hazardous Substances Pollution Contingency Plan; 
National Priorities List

AGENCY: Environmental Protection Agency.

ACTION: Notice of partial deletion of the rocky flats plant from the 
national priorities list.

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SUMMARY: The United States Environmental Protection Agency (EPA) Region 
8 announces the deletion of the Peripheral Operable Unit (OU) of the 
Department of Energy (DOE) Rocky Flats Plant and Operable Unit 3 (OU 
3), also referred to as the Offsite Areas, encompassing approximately 
25,413 acres, from the National Priorities List (NPL). 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). Rocky Flats Plant 
means the property owned by the United States Government, also known as 
Rocky Flats, Rocky Flats Site, or Rocky Flats Environmental Technology 
Site (RFETS) as shown in figure 1. The Rocky Flats Plant is divided 
into the Central and Peripheral Operable Units (Figure 2) which contain 
1,308 and 4,933 acres, respectively, and OU 3 (Figure 3) which contains 
approximately 20,480 acres. The 3 referenced figures are available in 
the http://www.regulations.gov index identified by Docket ID no. EPA-

HQ-SFUND-1989-0011.
    EPA and the State of Colorado, through the Colorado Department of 
Public Health and Environment (CDPHE), have determined that the 
Peripheral OU of the Rocky Flats Plant and OU 3 (Offsite Areas) poses 
no significant threat to public health or the environment and, 
therefore, no further remedial measures pursuant to CERCLA are 
appropriate.
    This partial deletion pertains to the surface media (soil, surface 
water, sediment) and subsurface media, including groundwater, within 
the Peripheral OU and OU 3 of the Rocky Flats Plant. The Central OU 
will remain on the NPL.

DATES: This partial deletion of the Peripheral OU and OU 3 is effective 
on May 25, 2007.

FOR FURTHER INFORMATION CONTACT: Rob Henneke, Community Involvement 
Coordinator (8OC), U.S. Environmental Protection Agency, Region 8, 1595 
Wynkoop Street, Denver, Colorado, 80202-1129; telephone number: 1-800-
227-8917 or 303-312-6734, fax number: 303-312-7150; e-mail address: 
henneke.rob@epa.gov.


SUPPLEMENTARY INFORMATION: The Rocky Flats Plant is a DOE facility 
owned by the United States. Rocky Flats is located in the Denver 
metropolitan area, approximately sixteen miles northwest of Denver, 
Colorado, and ten miles south of Boulder, Colorado. Nearby communities 
include the Cities of Arvada, Broomfield, and Westminster, Colorado. 
The majority of the Site is located in Jefferson County, with a small 
portion located in Boulder County, Colorado.
    Two OUs are present within the boundaries of the Site (the 
Peripheral OU and the Central OU), while OU 3 (Offsite Areas) 
encompasses property north, south, and primarily east of the Peripheral 
and Central OUs. This partial deletion pertains to the surface media 
(soil, surface water, sediment) and subsurface media, including 
groundwater, within the Peripheral OU and OU 3. The Central OU is not 
included within this partial deletion action and will remain on the 
NPL.
    On March 13, 2007, EPA published a Notice of Intent for Partial 
Deletion in the Federal Register (72 FR 11313) and local newspapers, 
announcing a thirty day public comment period, which proposed to delete 
the Peripheral OU and OU 3 from the NPL. Comments were received in the 
form of letters from CDPHE dated April 3, 2007 and from the City and 
County of Broomfield and City of Westminster, both April 12, 2007. The 
letters from the two cities were identical in terms of the comments 
each made. In all instances the state and the cities support the 
actions proposed in the notice of intent for partial deletion, however, 
the cities have other comments in their identical letters.
    The following are comments from the City and County of Broomfield 
and City of Westminster regarding the points-of-compliance as 
summarized:
    Broomfield/Westminster described that ``this partial deletion 
pertains to the surface media (soil, surface water, sediment) and 
subsurface media, including groundwater, within the Peripheral OU and 
OU 3 of the Rocky Flats Plant. The point-of-compliance for the Central 
OU is located within the Peripheral OU. The partial deletion assumes 
all surface water leaving the Central OU flowing through the Peripheral 
OU will meet surface water quality standards at the site boundary. 
There is a potential for the drainages to become contaminated by 
contaminated surface water or contaminated sediment flowing through the 
drainages.''
    Broomfield/Westminster also added that ``language in the Federal 
Register states the Department of Energy (DOE) will be responsible for 
all future remedial actions required at the area deleted if future site 
conditions warrant such actions. We support the language in the Federal 
Register. Our concern is the Department of Energy will only be 
evaluating surface water quality for uranium, plutonium, and americium 
as it flows from the Central OU. Other potential analytes that could be 
considered contaminants will not be evaluated to determine potential 
impacts to surface water or the drainages within the Peripheral OU.''
    In the Responsiveness Summary, EPA explained that DOE is required 
to evaluate uranium, plutonium and

[[Page 29277]]

americium at five locations: The terminus of the A-series ponds (GS11 
at the outfall of terminal pond A-4); the terminus of the B-series 
ponds (GS08 at the outfall of terminal pond B-5); the outfall of 
terminal pond C-2 (GS31), all of which are in the Central OU (DOE 
retained land); where Woman Creek meets Indiana (GS01); and where 
Walnut Creek meets Indiana (GS03). Prior to any release from the 
terminal ponds DOE is required to take pre-discharge samples. These 
samples include the three radionuclides mentioned above as well as 
nitrates. Based on extensive sampling throughout the life of the 
cleanup project these are the only constituents requiring ongoing 
evaluation at these locations. We have not found other constituents in 
the surface water at levels that exceed cleanup standards. Moreover, 
the Comprehensive Risk Assessment for Human Health and Ecological risk 
determined that the Peripheral OU is suitable for all uses. Therefore, 
monitoring of additional constituents is not needed in the Peripheral 
OU in order to protect human health and the environment.
    Broomfield/Westminster ``are concerned that previous closure 
documents did not address how the points-of compliance would be secured 
and controlled if they are not in an area located within DOE's 
jurisdiction. It is very important to us, as a downstream community, to 
ensure the integrity of the monitoring stations within the deleted area 
are maintained and secured.''
    In the Responsiveness Summary, EPA explained that the CAD/ROD 
requires that DOE retain points-of-compliance in surface water at 
discharge points from the three terminal ponds (A-4, B-5 and C-2), as 
well as at the points-of-compliance near Indiana Street. DOE's 
operation and maintenance responsibilities require that the monitors 
remain secure and in working order. A feature of the compliance 
monitoring system is that automatic alerts are sent to DOE personnel 
who are responsible for operation and maintenance of the monitors 
anytime there is a malfunction with the equipment. Because of this 
feature, problems with the monitors are immediately identified and 
corrected. As a part of operation and maintenance activities, the 
Parties will determine if additional security measures to protect these 
monitoring locations are needed.
    Broomfield/Westminster ``believe the protection of the monitoring 
stations within the proposed deleted area is a significant and valid 
concern because there were no institutional controls identified to 
protect the only enforceable monitoring stations at the site. EPA 
should be responsive and proactive and identify how these stations will 
be controlled and protected to prevent access to the general public. It 
is not good management to develop a protocol to protect the monitoring 
stations after their integrity has been jeopardized.''
    In the Responsiveness Summary, EPA agrees that protection of the 
monitoring stations at the site is important. Security of these 
monitoring stations has not been a problem in the past. The DOE, State, 
and EPA agree to review any future changes to the current uses and 
activities that could jeopardize the integrity of the monitors. Since 
DOE personnel receive automatic alerts whenever there are performance 
problems with the compliance monitors, implementation of other security 
measures is not necessary. The purpose of these monitors is to take 
samples during run-off events and the likelihood of tampering with the 
monitors during these events is less than the chances of failure 
occurring due to equipment break down. In either case, DOE personnel 
will be notified immediately and steps taken to correct the problems. 
Addition of security measures as suggested by Broomfield and 
Westminster will not add appreciably to the reliability of the monitors 
to take samples when flow events dictate.
    EPA identifies sites that appear to present a significant risk to 
public health, welfare, or the environment and maintains the NPL as the 
list of those sites. Any site deleted from the NPL remains eligible for 
Fund-financed actions in the unlikely event that conditions at the site 
warrant such action. Section 300.425(e)(3) of the NCP states that Fund-
financed actions may be taken at sites deleted from the NPL. Deletion 
of a site from the NPL does not affect responsible party liability or 
impede Agency efforts to recover costs associated with response 
efforts.

Lists of Subjects in 40 CFR Part 300

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

    Dated: May 16, 2007.
Robert E. Roberts,
Regional Administrator, Region 8.

0
For the reasons set forth in the preamble title 40 part 300 of the Code 
of Federal Regulations 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--[Amended]

0
2. Table 2 of appendix B to part 300 is amended by revising the entry 
for ``Rocky Flats Plant (USDOE)'' by adding a note ``P'' so that it 
reads as follows:

Appendix B to Part 300--National Priorities List

                                      Table 2.--Federal Facilities Section
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                State                          Site name                     City/county               Notes a
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                                                  * * * * * * *
CO..................................  Rocky Flats Plant (USDOE)..  Jefferson and Boulder Counties.            P

                                                  * * * * * * *
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\a\ * * *
* * * * * * *
P = Sites with partial deletion(s).


 [FR Doc. E7-10055 Filed 5-24-07; 8:45 am]

BILLING CODE 6560-50-P
