F I L E D
United States Court of Appeals
Tenth Circuit
PUBLISH
AUG 5 2003
UNITED STATES COURT OF APPEALS
PATRICK FISHER
Clerk
TENTH CIRCUIT
STATE OF COLORADO,
Plaintiff-Appellant,
v. No. 02-1014
SUNOCO, INC.; WASHINGTON
CONTRACTORS GROUP, INC.;
WASHINGTON GROUP INTERNATIONAL,
INC.; DENNIS WASHINGTON,
Defendants,
and
A.O. SMITH CORPORATION; ASARCO,
INCORPORATED; BECHTEL
CORPORATION,
Defendants-Appellees.
UNITED STATES OF AMERICA,
Amicus Curiae.
APPEAL FROM THE UNITED STATES DISTRICT COURT
FOR THE DISTRICT OF COLORADO
(D.C. No. 01-N-1)
Alan Gilbert, Solicitor General, (Ken Salazar, Attorney General, and Robert Marsh,
Office of Attorney General, with him on the briefs), Denver, Colorado, for the plaintiff-
appellant.
Steven W. Black, Holland & Hart LLP, Denver, Colorado, for defendant-appellee
ASARCO, Inc.; Scott E. Mortman, Mayer, Brown, Rowe & Maw, New York, New York,
for defendant-appellee Bechtel Corporation (Jerry N. Jones and Richard S. Vermeire,
Moye, Giles, O'Keefe, Vermeire & Gorrell LLP, Denver, Colorado, for defendant-
appellee A.O. Smith Corporation; Cassandra Sasso, Baker & Hostetler, Denver,
Colorado; Dennis P. Orr, Mayer, Brown, Rowe & Maw, New York, New York, for
defendant-appellee Bechtel Corporation, with them on the brief).
James D. Freeman (Thomas L. Sansonett, Assistant Attorney General; John T. Stahr and
Mark R. Haag, Department of Justice, Environment & Natural Resources Division; Alan
H. Carpian, Office of General Counsel, United States Environmental Protection Agency,,
on the brief), Washington, D.C., for the amicus curiae.
Before EBEL, BRISCOE, Circuit Judges, and SHADUR, District Judge.*
BRISCOE, Circuit Judge.
The State of Colorado (Colorado) appeals from the district court’s grant of
summary judgment on statute of limitations grounds in favor of defendants A.O. Smith
Corporation (Smith), ASARCO, Inc., Bechtel Corporation, and Sunoco, Inc., on
Colorado’s cost recovery claims under the Comprehensive Environmental Response,
Compensation and Liability Act (CERCLA), 42 U.S.C. §§ 9601 et seq. The district court
concluded that Colorado failed to bring its claims within the applicable six-year statute of
limitations, 42 U.S.C. § 9613(g)(2)(B). We exercise jurisdiction pursuant to 28 U.S.C.
§ 1291 and reverse and remand for further proceedings.
*
The Honorable Milton I. Shadur, Senior District Judge, Northern District of
Illinois, sitting by designation.
2
I.
This case concerns the cleanup of the Summitville Mine Site, an abandoned 550-
acre gold mine located in the mountains of southern Colorado. For much of its history,
the Site was mined using “conventional underground mining techniques.” App. at 171.
Because “these underground workings had a tendency to fill with groundwater during
certain seasons, mine adit facilities [i.e., horizontal openings] were installed to drain the
workings.” Id. Two of those adit facilities are at issue here. The Reynolds Adit, “driven
at one of the lowest topographic elevations” of the Site, “provide[d] one of the highest
gradients for groundwater flow” and “has been releasing metal-contaminated, acidic
water” into the environment since approximately 1906. Id. At some point in time, a
water treatment facility was installed to deal with the contaminated water released by the
Reynolds Adit. “The Chandler Adit was also driven to access the workings . . . and was
located 2,500 feet west of the Reynolds Adit portal at an elevation of 11,500 feet, 180 feet
higher than the Reynolds Adit portal.” Id.
During the final years of the Site’s operation (1986 to 1992), open-pit, heap leach
mining techniques were utilized. With these techniques, gold ore was mined from the
mountain, crushed, and heaped in a pile on a specially prepared and lined pad known as a
“heap leach pad.” Id. at 155. A solution of sodium cyanide was sprayed on and allowed
to percolate through the heaped ore to “leach” the gold from the ore. The run-off was
pumped from the heap, the gold was recovered, and the solution was renewed and reused
3
on the heap. The heap leach operations produced a substantial amount of contaminated
water (i.e., water contaminated with cyanide and toxic metals). To address this problem,
two water treatment plants were installed: one to deal with the cyanide and the other to
deal with the toxic metals. Apparently, neither plant was completely effective and the
treated water could not be released into the environment.
At some point during the heap-leach operations, a leak developed in the liner of
the heap leach pad, allowing cyanide solution to leak into the drain system below the pad.
Because the cyanide-contaminated water could not be discharged legally into the
environment, the mine operator installed a sump system to pump the contaminated water
back to the leach pad. The large amount of contaminated water pumped by the operator
to the heap leach pile, combined with large amounts of snow and rain water, resulted in
the pile becoming a huge pond with millions of gallons of cyanide and metal-polluted
water.
In early December 1992, the last operator of the mine, Summitville Consolidated
Mining Company, Inc. (SCMCI), filed for Chapter 7 bankruptcy. On December 16, 1992,
the State of Colorado and the Environmental Protection Agency (EPA) took control of the
Site to prevent a “disastrous release” of contaminated water into the environment due to
the likely cessation of water treatment operations by SCMCI.1 The EPA’s initial response
1
For example, the EPA opined that if the Site had been allowed to be abandoned
entirely, contaminated water would have been released “in very significant amounts to
Wightman Fork and the Alamosa River,” which in turn “would [have] devastated the
4
was aimed primarily at
maintaining site conditions throughout the winter, including prevention of
freezing or damage to existing facilities and equipment; preparing for
spring runoff, including drawing down the level of water in the Heap Leach
Pad to protect against overtopping during spring runoff; operation of the
wastewater treatment plants; and improving the quality of water discharged
from the facilities.
Id. at 226. As part of these initial steps, the EPA increased the efficiency and capacity of
the heap leach pad water treatment systems. On May 31, 1994, the Site was placed on the
National Priorities List (NPL), “a list of the most highly contaminated hazardous waste
sites in the United States.” Supp. App. at 252. The EPA since has published four
Focused Feasibility Studies, issued four Interim Records of Decision, conducted a
Sitewide Remedial Investigation and issued a Sitewide Feasibility Study. Actions are
ongoing at the Site, and, according to the governments, the final site-wide remedy is still
in the planning stages and construction is not set to begin on the final remedy until the
summer of 2004.
For purposes of this appeal, only three of the actions at the Site since its takeover
are at issue: (1) the plugging of the Chandler adit; (2) the installation of monitoring wells
in the Reynolds and Chandler adits; and (3) the construction of the sludge disposal area.
Plugging of the Chandler adit – As previously noted, contaminated water was
Alamosa river water shed with enormous quantities of toxic heavy metals and . . . cyanide
impacting fisheries, wetlands, drinking water wells, irrigated farm lands, [and] connected
watersheds.” App. at 157.
5
flowing out of the underground mine workings through the Reynolds adit. At the time the
governments took over the Site, a portable water treatment system was being used to treat
a portion of that contaminated water. Initially, the EPA modified the water treatment
system to increase its treatment capacity but this action did not totally eliminate the
discharge of contaminated water. The EPA concluded there were two basic options for
dealing with the problem -- take no action, leaving the portable water system treatment in
place, or install a concrete plug in the adit to block the outflow of contaminated water.
The EPA concluded the second alternative was preferrable, both from the standpoint of
reducing acid mine drainage and from a cost reduction perspective. As part of the process
of plugging the Reynolds adit, the EPA decided to simultaneously plug the Chandler adit.
Although no contaminated water was being discharged from the Chandler adit, it sat
approximately 180 feet above and was hydraulically connected to the Reynolds adit. The
EPA was concerned that plugging the Reynolds adit would cause contaminated water in
the mine to back up and eventually flow out of the Chandler adit.
Construction of the Reynolds adit plug, consisting of excavating loose rock,
drilling numerous radial grout holes, and installing concrete plugs and pipe, began on
November 22, 1993, and was completed by January 25, 1994. Construction of the
Chandler adit plug began on February 3, 1994, and ended on February 22, 1994. “Once
completed, there was an immediate decrease in flow, and an initial 65% decrease in
copper loadings from the Site overall.” Supp. App. at 261. “Also, copper loadings
6
directly attributable to the Reynolds Adit decreased by 97%.” Id. The Chandler adit plug
was reinforced in November 1994 after leakage occurred as a result of porous or fractured
rock surrounding the plug.
Monitoring wells for adit plugs – In order to determine the effects of the adit plugs
on the water levels and the formation of contamination inside the mountain, the EPA
drilled and installed some groundwater monitoring wells and regularly sampled water
from the wells to determine water chemistry and levels. It is uncontroverted that this
occurred in 1994.
Construction of sludge disposal area – The water treatment operations at the mine
produced, as a byproduct, waste treatment sludge. SCMCI had disposed of this sludge on
the heap leach pad. Because there was no other suitable repository immediately available,
the EPA continued that practice during the early part of the cleanup. The sludge was later
removed from the heap leach pad and temporarily placed in another area of the Site.
After apparently concluding that water treatment efforts at the Site would need to be
continued indefinitely, the EPA studied on-site options for long-term disposal/storage of
the sludge. The EPA concluded that a permanent sludge disposal area should be created
in the South Pit area of the mine.
There is conflicting evidence in the record concerning when construction of the
permanent sludge disposal area began. A report prepared by an outside consulting firm
dated April 2, 1999, stated that construction began in July 1994. Other evidence
7
suggested construction began sometime in 1995. An April 1995 EPA report stated that
competitive bidding for construction of the disposal area did not begin until April 5,
1995. Further, an affidavit from an EPA project manager for the Site indicated that
construction of the sludge disposal area occurred sometime between July 1995 and July
1996.
Litigation arising from the cleanup – Colorado and the United States filed suit in
May 1996 under CERCLA against various parties, including Robert M. Friedland, the
owner of the parent company of SCMCI, to recover costs associated with the cleanup of
the Site. At no time during the pendency of that suit did the governments assert claims
against the defendants in the instant action. According to the record, that action was
ultimately settled.
On January 2, 2001, Colorado filed this action pursuant to CERCLA §§ 107 and
113, 42 U.S.C. §§ 9607 and 9613, to recover from defendants the response costs incurred
and to be incurred at the Site. On April 17, 2001, defendant Smith (a shareholder of
SCMCI) moved for summary judgment based upon CERCLA’s statute of limitations. In
response, Colorado asserted there were genuine issues of material fact concerning
whether activities undertaken at the Site constituted removal or remedial actions and
when physical on-site construction of a remedial action began at the Site. The district
court granted Smith’s motion, concluding that Colorado’s complaint was untimely. The
district court concluded that the governments had initiated physical construction of at
8
least three remedial actions on the Site prior to January 2, 1995 (six years prior to the
filing of the complaint). These three remedial actions included: (1) plugging the
Reynolds and Chandler adits; (2) installation of monitoring wells in the Reynolds and
Chandler adits; and (3) construction of the sludge disposal area. The district court also
sua sponte granted summary judgment in favor of the remaining defendants (all of whom
had filed motions to dismiss), concluding there was “no dispute of material fact with
respect to the statute of limitations issue.” App. at 80.
Following the district court’s entry of summary judgment, Colorado filed a motion
pursuant to Federal Rule of Civil Procedure 59(e) to alter, amend, or reconsider. In
support of its motion, Colorado argued, in pertinent part, that a response action
reasonably could be separated into “operable units,” and that a separate recovery action
could be filed for each operable unit. Colorado further asserted there were five operable
units at the Site, and that the recovery action was timely with respect to at least two of
those operable units. The district court rejected the motion, concluding that “CERCLA’s
statute of limitations does not apply to individual operable units of a remedial action,” and
that “plaintiff’s argument [wa]s untimely because plaintiff had the opportunity to fully
brief this argument in opposition to A.O. Smith’s motion for summary judgment and its
opposition to defendants’ motions to dismiss.” Id. at 99.
II.
CERCLA statutes of limitation for cost recovery actions
9
Section 113(g)(2) of CERCLA, 42 U.S.C. § 9613(g)(2), sets forth the following
limitations periods for filing suits to recover costs:
An initial action for recovery of the costs referred to in section 9607
of this title must be commenced--
(A) for a removal action, within 3 years after completion of
the removal action, except that such cost recovery action must
be brought within 6 years after a determination to grant a
waiver under section 9604(c)(1)(C) of this title for continued
response action; and
(B) for a remedial action, within 6 years after initiation of
physical on-site construction of the remedial action, except
that, if the remedial action is initiated within 3 years after the
completion of the removal action, costs incurred in the
removal action may be recovered in the cost recovery action
brought under this subparagraph.
In any such action described in this subsection, the court shall enter a
declaratory judgment on liability for response costs or damages that will be
binding on any subsequent action or actions to recover further response
costs or damages. A subsequent action or actions under section 9607 of this
title for further response costs at the vessel or facility may be maintained at
any time during the response action, but must be commenced no later than 3
years after the date of completion of all response action. Except as
otherwise provided in this paragraph, an action may be commenced under
section 9607 of this title for recovery of costs at any time after such costs
have been incurred.
In applying these limitations periods, a court must determine what constitutes a “removal”
or “remedial” action. Section 9601 of CERCLA sets forth the following detailed
definitions of “removal” and “remedial” actions:
(23) The terms “remove” or “removal” means the cleanup or
removal of released hazardous substances from the environment, such
actions as may be necessar[ily] taken in the event of the threat of release of
hazardous substances into the environment, such actions as may be
necessary to monitor, assess, and evaluate the release or threat of release of
hazardous substances, the disposal of removed material, or the taking of
10
such other actions as may be necessary to prevent, minimize, or mitigate
damage to the public health or welfare or to the environment, which may
otherwise result from a release or threat of release. The term includes, in
addition, without being limited to, security fencing or other measures to
limit access, provision of alternative water supplies, temporary evacuation
and housing of threatened individuals not otherwise provided for, action
taken under section 9604(b) of this title, and any emergency assistance
which may be provided under the Disaster Relief and Emergency
Assistance Act [42 U.S.C.A. § 5121 et seq.].
(24) The terms “remedy” or “remedial action” means those actions
consistent with permanent remedy taken instead of or in addition to removal
actions in the event of a release or threatened release of a hazardous
substance into the environment, to prevent or minimize the release of
hazardous substances so that they do not migrate to cause substantial danger
to present or future public health or welfare or the environment. The term
includes, but is not limited to, such actions at the location of the release as
storage, confinement, perimeter protection using dikes, trenches, or ditches,
clay cover, neutralization, cleanup of released hazardous substances and
associated contaminated materials, recycling or reuse, diversion,
destruction, segregation of reactive wastes, dredging or excavations, repair
or replacement of leaking containers, collection of leachate and runoff,
onsite treatment or incineration, provision of alternative water supplies, and
any monitoring reasonably required to assure that such actions protect the
public health and welfare and the environment. The term includes the costs
of permanent relocation of residents and businesses and community
facilities where the President determines that, alone or in combination with
other measures, such relocation is more cost-effective than and
environmentally preferable to the transportation, storage, treatment,
destruction, or secure disposition offsite of hazardous substances, or may
otherwise be necessary to protect the public health or welfare; the term
includes offsite transport and offsite storage, treatment, destruction, or
secure disposition of hazardous substances and associated contaminated
materials.
42 U.S.C. §§ 9601(23), (24).
In Public Service Company of Colorado v. Gates Rubber Company, 175 F.3d 1177
(10th Cir. 1999), we summarized our understanding of the definitions of “removal” and
11
“remedial” actions:
Generally, a removal action costs less, takes less time, and is geared to
address an immediate release or threat of release. In broad contrast, a
remedial action seeks to effect a permanent remedy to the release of
hazardous substances when there is no immediate threat to the public
health. Remedial actions usually cost more and take longer. Elements of
either response action may overlap and semantics often obscure the actual
nature of the cleanup performed.
Id. at 1182 (internal citations and footnote omitted).
Interpretation of statutes of limitation
Colorado contends the district court erred in interpreting the cost recovery statutes
of limitation contained in CERCLA. The district court concluded these statutes of
limitation anticipate one removal action and one remedial action per site. Colorado
contends, however, that multiple removal or remedial actions can be implemented at a
single site, and the cost recovery statutes of limitation in CERCLA were intended by
Congress to apply separately to each individual removal and/or remedial action. In other
words, Colorado argues, “each separate removal and remedial action is subject to
individual application of the cost recovery statutes of limitation.” Aplt. Br. at 34. Thus,
in Colorado’s view, “cost recovery actions can be brought at any time until three years
after the completion of all remedial and removal actions.” Id. at 40.
Colorado contends its view is supported by the language of and the policies
underlying CERCLA. According to Colorado, “[s]eparate application of the cost
recovery statutes of limitation” “encourages rapid, proper cleanup because it allows
12
enough time for the government to focus its limited resources properly upon rapid
cleanup rather than broad, expensive, complicated litigation against all potentially
responsible parties,” and it “conserves judicial resources by avoiding the need for
wholesale, protective, early suits against numerous parties at complex sites.” Aplt. Br. at
41-42 (emphasis in original). Finally, Colorado argues that “it encourages at least partial
government recovery of its cleanup costs from responsible parties, even if early time
periods for recovery expire.” Id. at 42.
We note that the issue now asserted by Colorado was not raised in its response to
Smith’s motion for summary judgment. In that response, Colorado argued only that
genuine issues of material fact existed concerning whether the actions at issue were
properly classified as “removal” or “remedial” actions. After the district court granted
Smith’s motion for summary judgment, Colorado filed a motion to alter or amend
judgment. For the first time, Colorado argued that the statute of limitations applied
separately to the individual removal and remedial actions, or “operable units,” of a single
response action taken at a particular site. The district court rejected this argument as
untimely and on the merits.
Assuming the issue is properly before us, we conclude that Colorado’s argument is
not supported by the text of § 9613(g)(2). Although both subsections (A) and (B) of
§ 9613(g)(2) use the indefinite article “a” to modify the phrases “removal action” and
“remedial action,” they also both use the definite article “the” to modify those same
13
phrases. As asserted by defendants, use of this definite article suggests there will be but a
single “removal action” and a single “remedial action” per site. E.g., United States v.
Aguilar, 515 U.S. 593, 608 (1995) (Stevens, J., concurring and dissenting) (construing
statutory use of definite article “the” in a similar fashion); Freytag v. CIR, 501 U.S. 868,
902 (1991) (Scalia, J., concurring) (same). Perhaps most persuasive is the language in
subsection (B) which states that “if the remedial action is initiated within 3 years after the
completion of the removal action, costs incurred in the removal action may be recovered
in the cost recovery action brought under this subparagraph.” (Emphasis added.) In our
view, this language indicates there will be but one “removal action” per site or facility, as
well as a single “remedial action” per site or facility. If Congress intended to allow
multiple actions for separate components of recovery or remedy, it surely would have
used the indefinite article “a” rather than the definite article “the” to modify the phrases
“removal action” and “remedial action.” These same conclusions apply to the last
paragraph of § 9613(g)(2), which refers to “the response action” and suggests there will
only be one such “response action” per facility or site. Our reading of the statute does not
foreclose cost recovery actions that may be filed in some cases many years after the initial
limitations period has run. The statute distinguishes between an “initial action” to recover
costs and a “subsequent action or actions to recover further response costs.” 42 U.S.C.
§ 9613(g)(2). As long as the EPA or a state files an initial action for cost recovery within
the time periods specified in § 9613(g)(2)(A) and (B), subsequent actions may be filed to
14
recover “further response costs at the vessel or facility . . . at any time during the response
action, but must be commenced no later than 3 years after the date of completion of all
response activity.” Id. Therefore, if response activity occurs after the limitations period
has run, the cost of that activity may be recovered if an initial cost recovery action for the
site was timely filed and the subsequent action is filed no later than three years after
cessation of all response activity at the site.
For these reasons, we agree with the district court’s interpretation of § 9613(g)(2).2
We therefore also agree that the key issue in determining the timeliness of Colorado’s
action is when “physical on-site construction of the [first] remedial action” occurred at
the Site. 42 U.S.C. § 9613(g)(2)(B).
Deference to EPA’s characterizations of response actions
Both Colorado and the United States, appearing as amicus in support of Colorado,
contend that the district court, in applying CERCLA’s statutes of limitation, failed to
grant proper deference to the EPA’s characterization of the actions at issue. Colorado
2
The United States, appearing as amicus in support of Colorado, complains that,
under this interpretation of the statute of limitations, the EPA’s deadline for filing an
initial cost recovery action on the final remedy in this case “would have expired before
the agency had even decided whether additional remedial action was necessary.” Amicus
Br. at 29-30. What the United States fails to mention, however, is that it (a) filed a timely
recovery action against other parties involved with the Site, (b) became aware of the
defendants in the instant action during the pendency of that action, and (c) intentionally
chose not to include them as parties to the initial action. Had the defendants been named
as parties in the initial action, there presumably would have been no statute of limitations
problem.
15
contends that “the EPA’s decisions setting the scope and characterization of removal and
remedial actions at the Summitville mine are owed deference” by the courts. Aplt. Br. at
47. In particular, Colorado suggests that deference is appropriate under Chevron U.S.A.
Inc. v. Natural Resources Defense Council, Inc., 467 U.S. 837 (1984). According to
Colorado, such deference is owed because “Congress has expressly delegated to [the]
EPA the power to choose the particular scope and characterization of removal and
remedial actions under CERCLA, and to apply those rules to particular sites.” Aplt. Br. at
49. The United States asserts that the district court’s “de novo” approach to deciding
whether the response actions were remedial in nature was contrary to 42 U.S.C.
§ 9613(j)(2).3
We turn first to the federal government’s § 9613(j)(2) argument. Colorado did not
assert this argument in the district court, and did not assert reliance on or cite § 9613(j)(2)
in its appellate pleadings. We are therefore reluctant to consider it. See Harris v. Owens,
264 F.3d 1282, 1288 n.3 (10th Cir. 2001) (“absent 'exceptional circumstances,' we do not
ordinarily consider issues raised only in an amicus brief”). Even if we did consider the
§ 9613(j)(2) argument, we would reject it. Nothing in § 9613(j)(2) refers to the EPA’s
3
42 U.S.C. § 9613(j)(2), which concerns the “Standard” for “Judicial Review,”
provides:
In considering objections raised in any judicial action under this
chapter, the court shall uphold the President’s decision in selecting
the response action unless the objecting party can demonstrate, on
the administrative record, that the decision was arbitrary and
capricious or otherwise not in accordance with law.
16
characterization of a particular action, or to the statute of limitations. Instead, the plain
language of § 9613(j)(2) grants deference only to the EPA’s “decision in selecting the
response action” at issue. In other words, § 9613(j)(2) is aimed at protecting the EPA’s
decision to engage in a particular removal or remedial action (e.g., where a defendant in a
cost recovery action, in order to avoid liability, challenges a particular recovery action as
unwarranted). Moreover, the United States has cited no case in support of its proposed
interpretation of § 9613(j)(2).
We also reject Colorado’s assertion that Chevron deference is appropriate here.
None of the statutes or regulations cited by Colorado expressly or implicitly afford
deference to the EPA’s characterizations in this context. See United States v. Mead
Corp., 533 U.S. 218, 227, 229 (2001) (discussing when Chevron deference is
appropriate). There is no indication that Congress intended for the EPA “to speak with
the force of law” in characterizing response actions for purposes of the application of
CERCLA’s statutes of limitation. Id. at 229. Further, we note that the EPA’s
characterizations of actions in this case, all of which are set forth in agency reports or
memos, are not adjudicative rulings, see id., nor are they the result of “a relatively formal
administrative procedure tending to foster the fairness and deliberation that should
underlie a pronouncement of such force,” id. at 230. Rather, those characterizations
appear to have been made by the EPA while carrying out its primary responsibility of
responding to the environmental threats at the Site.
17
Although we reject the application of Chevron deference in this context, we
conclude that deference is owed to the EPA’s characterizations under Skidmore v. Swift
& Co., 323 U.S. 134 (1944).4 Clearly, the EPA has expertise in selecting and executing
removal and remedial actions. Thus, we believe the EPA’s characterizations of its actions
carry “some weight.” See Skidmore, 323 U.S. at 139-40 (concluding agency’s rulings,
interpretations, and opinions carried some weight, since they were “made in pursuance of
official duty, based upon more specialized experience and broader investigations and
information than is likely to come to a judge in a particular case”); see also American
Petroleum Inst. v. United States Env’t Prot. Agency, 216 F.3d 50, 57 (D.C. Cir. 2000)
(“Where an industrial by-product may be characterized as discarded or ‘in process’
material, EPA’s choice of characterization is entitled to deference.”). Such deference
seems particularly appropriate where an action reasonably can be classified as both
“removal” and “remedial” under CERCLA’s complex definitional provisions. As to the
precise weight to be given the EPA’s characterization of a particular action, we believe
that hinges on “the thoroughness evident in its consideration, the validity of its reasoning,
its consistency with earlier and later pronouncements, and all those factors which give it
4
We note that Colorado did not raise its deference arguments in the district court.
Although we typically decline to consider such arguments on appeal, e.g., King v. United
States, 301 F.3d 1270, 1274 (10th Cir. 2002), we exercise our discretion to do so here for
two related reasons. First, the arguments are not outcome determinative in this appeal.
We would reach the same conclusions even if we granted no deference to the EPA’s
characterizations. Second, and most importantly, the deference issue may have some
impact on the proceedings on remand.
18
power to persuade.” Skidmore, 323 U.S. at 140.
Character of the three cleanup actions at issue
Colorado contends the district court erred in characterizing the three response
actions at issue as “remedial” actions under CERCLA (and in turn concluding the
initiation of those activities triggered the running of the statute of limitations under
§ 9613(g)(2)(B)). We agree. For the reasons that follow, we conclude as a matter of law
that the plugging of the Chandler adit and installation of the monitoring wells constituted
“removal” activities for purposes of CERCLA’s statutes of limitation. As for the
construction of the sludge disposal area, we conclude the issue was not properly raised by
defendant Smith in its summary judgment motion, and that, in any event, genuine issues
of material fact exist regarding when that activity occurred.
Chandler adit plug – The district court concluded that installation of the Chandler
adit plug constituted a “remedial” action because “the Chandler adit was not discharging
water before or at the time it was plugged,” and thus “was not plugged in response to an
actual release [of hazardous waste], or in response to any imminent release, but rather, as
part of an overall, long-term solution to contamination at the Summitville Mine site.”
App. at 75. We reject this conclusion.
It is uncontroverted that the Reynolds adit was discharging water contaminated
with toxic metals when the EPA took over the Site. It is further uncontroverted that the
water treatment system in place, even as modified by the EPA after takeover, was not
19
sufficient to adequately treat all of the contaminated water emanating from the Reynolds
adit. Thus, the EPA concluded it was necessary to take action to prevent the discharge of
contaminated water, particularly during the springtime runoff from the mountain. The
action selected by the EPA was to plug the Reynolds adit. Because plugging the
Reynolds adit created the likelihood of contaminated water discharging from the Chandler
adit, the EPA concluded it was necessary to also plug the Chandler adit.
Although the district court was correct in noting that the Chandler adit was not
discharging contaminated water at the time it was plugged, that does not necessarily mean
it constituted a “remedial” rather than a “removal” action under CERCLA. “Removal”
actions are defined under CERCLA to include “actions as may be necessar[ily] taken in
the event of the threat of release of hazardous substances into the environment.” 42
U.S.C. § 9601(23) (emphasis added). Plugging the Chandler adit is easily characterized
as such an action since it was taken as a result of the threat of release of contaminated
water, i.e., the likelihood that contaminated water would discharge from the Chandler adit
following the plugging of the Reynolds adit.
At least three other factors support this characterization. First, it is uncontroverted
that the EPA did not know precisely how the underground mine workings would react to
the plugging of the adits. Although the EPA was fairly certain the plugging would seal
the adits and force the contaminated water back into the mountain, it was uncertain
whether the plugging would achieve the goal of eliminating treatment of the water.
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Because of these uncertainties, the EPA installed a pipe and valve in the Reynolds adit
plug to allow the EPA to return to the status quo if necessary. Second, as noted by
Colorado, “the initial construction of both adit plugs was finished about 14 months after
[the] EPA took control of the mine,” “a relatively short time frame” “[i]n the context of a
clean-up lasting more than a decade in a harsh environment.” Aplt. Br. at 53. Finally, it
appears uncontroverted that the EPA has consistently characterized the plugging of both
the Reynolds and Chandler adits as “removal” actions.
Adit monitoring wells – The district court concluded that installation of the adit
monitoring wells constituted a “remedial” action under CERCLA. App. at 75. In
reaching this conclusion, the district court noted only that “CERCLA expressly includes
‘monitoring’ within the definition of remedial actions.” Id. The district court overlooked
the fact that monitoring activities are also expressly included within CERCLA’s
definition of “removal” actions. In particular, CERCLA defines the terms “remove” or
“removal” to include “such actions as may be necessary to monitor, assess, and evaluate
the release or threat of release of hazardous substances.” 42 U.S.C. § 9601(23). As
applied here, that clearly includes installation of the adit monitoring wells. Thus, the
nature of the activity, i.e., “monitoring,” does not necessarily lead to a conclusion that the
activity should be characterized as “remedial.”
For the reasons discussed above concerning installation of the adit plugs
themselves, we believe it is reasonable to characterize the installation of the monitoring
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wells as a “removal” action. The wells were installed so that the EPA could determine
how the mountain reacted to the plugging of the adits and whether the plugging was
effective in reducing the level of contamination in the water. Further, the EPA itself has
consistently considered installation of the monitoring wells, like installation of the adit
plugs themselves, to be a “removal” action.
Sludge disposal area – The third and final activity characterized by the district
court as a “remedial” action was construction of an on-site disposal area for sludge
created by the wastewater treatment facilities. After examining the record on appeal, we
conclude the district court erred in granting summary judgment on the basis of this
activity. Although construction of the sludge disposal area was briefly mentioned in the
“Statement of Undisputed Material Facts” section of Smith’s summary judgment motion,
Supp. App. at 231 (“Beginning in July 1994, the EPA began ‘construction’ of a sludge
disposal area.”), no further mention was made of the activity in Smith’s motion. In the
argument section of its motion, Smith asserted “that the State took numerous actions prior
to January 2, 1995 which constituted ‘remedial action.’” Id. at 240. Although Smith
listed nine specific actions it believed were “remedial” in nature, no mention was made of
construction of the sludge disposal area. In turn, there was no analysis of this activity in
Colorado’s response brief or in Smith’s reply brief. Thus, we question whether the
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activity was legitimately at issue before the district court.5
Even assuming the issue was adequately raised, we conclude there are genuine
issues of material fact concerning when the activity occurred. Although one document
submitted by Smith states that construction of the sludge disposal area began in July
1994, Supp. App. at 290, other evidence submitted by the parties indicates construction
did not began until sometime after April 1995, id. at 264 (indicating the sludge disposal
area was built during Phase III of the Cropsy Waste Pile project); id. at 322-23 (indicating
Phase III of the Cropsy Waste Pile project, including construction of the sludge disposal
area, was placed for competitive bid on April 5, 1995); App. at 197 (indicating
completion of Phase III of the Cropsy Waste Pile project, including construction of the
sludge disposal area, occurred between July 1995 and July 1996). If a finder of fact
5
The importance of argument by the parties on this point cannot be overlooked.
On one hand, the activity would appear to fall within the scope of “remedial” actions as
defined in CERCLA. “Remedial” actions under CERCLA generally include “those
actions consistent with permanent remedy taken instead of or in addition to removal
actions.” 42 U.S.C. § 9601(24). Further, “remedial” actions include “such actions at the
location of the release [of a hazardous substance] as storage [and] confinement.” Id. As
applied here, that would seemingly include construction of the sludge disposal area,
which was intended by the EPA as a permanent storage area for the sludge created by the
wastewater treatment activities at the Site. Other factors, however, suggest that the
activity reasonably might be classified as part of a broader “removal” action. It is clear
from reviewing the record on appeal that this activity was relatively minor in comparison
to all of the actions at the Site. The sludge produced by the wastewater treatment efforts
at the Site was not one of the environmental hazards that prompted the EPA to take over
the Site. The sludge was a byproduct of the EPA’s efforts in dealing with the true hazard
present at the Site, i.e., contaminated water. Thus, construction of a sludge disposal area
arguably could be considered a component of an overall removal action aimed at the
primary hazard at issue on the Site.
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found the latter evidence more persuasive, then characterization of the activity as
“removal” or “remedial” would become irrelevant, since in either instance the activity
would have occurred within six years of the date this action was filed.
For these reasons, we hold that the district court erred in concluding, as a matter of
law, that construction of the sludge disposal area was a “remedial” action that triggered
the running of the statute of limitations under § 9613(g)(2)(B).
Motion to strike portions of the record on appeal
Appellees have moved to strike portions of Colorado’s appendix, as well as
exhibits attached to the United States’ amicus brief. In support of their motion, appellees
contend these materials were either not part of the district court record or were submitted
to the district court only after its summary judgment ruling and are not properly part of
the record on appeal.
To the extent the materials at issue were presented by Colorado to the district court
(i.e., the declarations of Angus Campbell and Austin Buckingham, which were included
as attachments to Colorado’s motion to alter or amend judgment, and the EPA’s Interim
Final Potentially Responsible Party Search Report, which was submitted by Smith in
opposition to the motion to alter or amend), we conclude they are properly before this
court. We grant the motion to strike the remaining materials.
Appellees’ motion to strike portions of the record on appeal is GRANTED in part
and DENIED in part. The judgment of the district court is REVERSED and the case is
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REMANDED to the district court for further proceedings consistent with this opinion.
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