Residents of Gordon Plaza v. Cantrell ( 2022 )


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  • Case: 21-30294      Document: 00516188120         Page: 1    Date Filed: 02/01/2022
    United States Court of Appeals
    for the Fifth Circuit                              United States Court of Appeals
    Fifth Circuit
    FILED
    February 1, 2022
    No. 21-30294
    Lyle W. Cayce
    Clerk
    Residents of Gordon Plaza, Inc.,
    Plaintiff—Appellant,
    versus
    LaToya Cantrell, in her official Capacity as Mayor of the City of New
    Orleans; City of New Orleans,
    Defendants—Appellees.
    Appeal from the United States District Court
    for the Eastern District of Louisiana
    USDC No. 2:20-CV-1461
    Before Owen, Chief Judge, and Clement and Engelhardt, Circuit
    Judges.
    Edith Brown Clement, Circuit Judge:
    Appellant, the Residents of Gordon Plaza, Inc. (“Gordon Plaza”),
    appeals the dismissal with prejudice of its complaint, filed under the citizen-
    suit provision of the Resource Conservation and Recovery Act (RCRA), 
    42 U.S.C. § 6972
    (a)(1)(B), against the Appellees—LaToya Cantrell, in her
    official capacity as Mayor of the City of New Orleans, and the City of New
    Orleans (collectively, the “City”).
    For the reasons that follow, we AFFIRM.
    Case: 21-30294       Document: 00516188120         Page: 2    Date Filed: 02/01/2022
    No. 21-30294
    I.
    A.
    Gordon Plaza is an association of primarily African American
    residents of a neighborhood called Gordon Plaza located on the site of the
    Agriculture Street Landfill (“Site”) that the City previously owned and
    operated. Because of this previous use, the Site allegedly contains significant
    levels of hazardous chemicals and solid waste. Approximately twenty years
    after the City ceased using the Site as a landfill, it developed the Site for
    residential use. The City is alleged to have targeted Black residents in selling
    the residential units and without disclosing that the Site had previously been
    used as a landfill.
    In 1994, the Environmental Protection Agency (“EPA”) listed the
    Site as a Superfund site on the National Priorities List (“NPL”) based on
    concerns about arsenic, lead, and polynuclear aromatic hydrocarbon levels.
    From 1994 to 2001, the EPA fenced off part of the Site, removed two feet of
    soil in some areas, placed a permeable “geotextile mat” over some
    contaminated soils, and covered some contaminated soils with about a foot
    of soil. In 2002, the EPA announced it had “completed all response actions
    for the Agriculture Street Landfill site in accordance with Close Out
    Procedures for National Priorities List Sites.”
    In 2005, Hurricane Katrina devastated New Orleans. The complaint
    alleges that, after the storm, the U.S. Agency for Toxic Substances and
    Disease Registry (a federal public health agency of the U.S. Department of
    Health and Human Services) concluded that chemical concentrations at the
    Site “pose[d] an indeterminate public health hazard.” And in 2018, the EPA
    determined that the soil on nine residential properties on the Site “may
    contain contaminant levels that are unacceptable for non-industrial use.”
    Gordon Plaza alleges that, because of soil erosion caused by storms and the
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    passing of time, the geotextile mat is exposed in some places and missing in
    others, releasing contaminated soil.
    In 2008, the EPA and the City reached a Superfund consent decree
    (“Consent Decree” or “Decree”) requiring the City to take certain actions
    to “protect the remedy” that the EPA installed at the Site, and “thereby,
    [protect] the public health or welfare or the environment at the Site.” The
    “remedy” is defined as “the excavation of 24 inches of soil, placement of a
    permeable geotextile mat/marker on the subgrade, backfilling the excavated
    area with clean fill, covering the clean fill with grass sod, landscaping and yard
    restoration, driveway and sidewalk replacement, and final detailing.”
    Because the “soil cap and geotextile mat covering the Site could be breached
    or degraded by excavation . . . or by the failure to maintain the vegetative
    cover over the soil cap,” the Decree requires the City “to maintain the [soil]
    cap” at the Site. Specifically:
    The [City] will mow vegetation at least twice per year, and
    otherwise maintain[] its right of ways . . . in order to maintain a
    stable vegetative cover. Because lack of mowing/maintenance
    by private owners of land within the Site is likely to damage the
    subsurface geotextile mat, the City will use its available
    authorities to (a) require that landowners mow and otherwise
    maintain the grass vegetation on their properties, or
    (b) undertake the necessary maintenance directly.
    The City must also “refrain from using the Site . . . in any manner that would
    interfere with or adversely affect the implementation, integrity, or
    protectiveness of the remedy.”
    The Decree also required the City to provide a Technical Abstract—
    a protocol for utility providers to “follow to maintain the integrity of the
    permeable soil and geotextile mat” with instructions on how to properly
    excavate beneath the geotextile mat, if necessary—to all utilities operating
    within the Site, and to “direct that all of its agencies and
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    departments . . . incorporate    the   Technical     Abstract . . . as   standard
    operating procedures when working within the Site.”
    Among its other commitments under the Consent Decree, the City
    was required to “designate an official of the City as the Project Coordinator
    who will be responsible for ensuring the City’s compliance with the
    requirements of the Decree” and who “shall be the lead point of contact for
    EPA with the City.” The City “shall submit to EPA on an annual basis . . . a
    written progress report that describes the actions which have been taken to
    achieve compliance.”       And the Decree additionally provides for EPA
    oversight, including access for “5-year reviews,” for “[m]onitoring,
    investigation, removal, remedial or other activities at the Site,” as well as for
    “[a]ssessing [the City’s] compliance with [the] Consent Decree.”
    The EPA’s most recent five-year review report was issued in 2018
    (“2018 Five-Year Review Report”) and comprises 31 pages of EPA findings
    and 321 pages of attachments and appendices. The Report concluded that
    the City was in compliance with the Consent Decree. Specifically, the Report
    stated that the “soil barrier that covers the entire site is in place and expected
    to remain in place over time, restricting exposure to the remaining subsurface
    contaminants associated with the site.”
    B.
    On May 15, 2020, Gordon Plaza brought this citizen suit under RCRA,
    § 6972(a)(1)(B), alleging that the Site remains contaminated with hazardous
    chemicals causing residents to suffer from cancer and other health
    conditions. Gordon Plaza seeks a declaration of imminent and substantial
    endangerment and an order that the City perform an environmental quality
    analysis, risk assessment, and full abatement of the Site. The complaint failed
    to inform the district court of the 2008 Consent Decree between the City and
    the EPA.
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    The City attached the Decree to its responsive pleadings and moved
    to dismiss under Federal Rules of Civil Procedure 12(b)(1) and 12(b)(6),
    arguing that the suit was precluded by RCRA’s statutory bar on citizen suits
    where a “responsible party is diligently conducting a removal action”
    pursuant to a consent decree with the EPA.                               See 
    42 U.S.C. § 6972
    (b)(2)(B)(iv); see also Comprehensive Environmental Response,
    Compensation, and Liability Act of 1980 (“CERCLA”), 
    42 U.S.C. § 9601
    (23) (providing statutory definition of “removal” action). The district
    court took judicial notice of the Consent Decree and granted dismissal with
    prejudice based on its finding that the Decree “requires the City to perform
    removal actions on an ongoing basis” and that Gordon Plaza “fail[ed] to
    plausibly allege that the City’s continued actions under the consent decree
    are not ‘removal actions.’”
    Gordon Plaza moved the court to reconsider its final order under Rule
    59(e). See Fed. R. Civ. P. 59(e). The district court denied the motion.
    Gordon Plaza timely appealed.
    We note that the instant lawsuit presents Gordon Plaza’s second time
    at bat on these claims—which it failed to properly inform the district court
    about as required by the local rules. See E.D. La. L.R. 3.1. In April 2018,
    Gordon Plaza filed a RCRA citizen suit against the City, seeking the
    relocation of its members (“2018 Litigation”). The suit was dismissed
    without prejudice for lack of standing. Residents of Gordon Plaza, Inc. v.
    Cantrell (Gordon Plaza I), No. 18-4226, 
    2019 WL 2330450
    , at *2–3 (E.D. La.
    May 31, 2019). 1 Gordon Plaza’s motion to amend the complaint was denied
    1
    The Gordon Plaza I court offered its view in dicta that the 2008 Consent Decree
    did not trigger RCRA’s statutory bar against citizen suits. 
    2019 WL 2330450
    , at *3–4. The
    court found that the City’s obligations, such as “maintaining a stable vegetative cover,
    involve basic maintenance of completed removal actions” and are not, themselves, removal
    actions. 
    Id. at *3
    . The court cited no authority for this holding. Because the district court’s
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    upon the district court’s finding that Gordon Plaza had acted with “bad faith
    or dilatory motive” because, in part, its “theories of recovery [were]
    intentionally advanced in a piecemeal or disjointed fashion.”
    On appeal, Gordon Plaza argues three grounds for reversal. First, that
    the district court abused its discretion by relying on the City’s diligent-
    removal-action defense, which Gordon Plaza contends was improperly
    asserted in a reply brief. Second, that the district court erred in finding that
    the City has been diligently engaged in a removal action. 2 And third, that the
    district court abused its discretion by denying leave to amend.
    II.
    We review de novo the grant of a motion to dismiss under
    Rule 12(b)(6). See Meador v. Apple, Inc., 
    911 F.3d 260
    , 264 (5th Cir. 2018).
    “To survive a motion to dismiss, a complaint must contain sufficient factual
    matter, accepted as true, to ‘state a claim to relief that is plausible on its
    face.’” Ashcroft v. Iqbal, 
    556 U.S. 662
    , 678 (2009) (quoting Bell Atl. Corp. v.
    Twombly, 
    550 U.S. 544
    , 570 (2007)). “A claim has facial plausibility when
    the plaintiff pleads factual content that allows the court to draw the
    reasonable inference that the defendant is liable for the misconduct alleged.”
    
    Id.
     We accept all well-pleaded facts as true and draw all reasonable inferences
    in favor of the plaintiff. See Kelson v. Clark, 
    1 F.4th 411
    , 416 (5th Cir. 2021).
    discussion of the citizen-suit statutory bar takes place in dicta and in a separate civil action
    seeking distinct relief, it was not the law of the case in the underlying proceedings. See Med.
    Ctr. Pharmacy v. Holder, 
    634 F.3d 830
    , 834 (5th Cir. 2011) (law of the case doctrine
    “govern[s] the same issue in subsequent stages in the same case” (emphasis added)).
    2
    Gordon Plaza disputed the district court’s taking judicial notice of the 2008
    Consent Decree and the 2018 Five-Year Review Report. It has waived that issue on appeal.
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    III.
    Gordon Plaza sets forth three arguments to challenge the district
    court’s dismissal of the complaint under RCRA’s statutory bar, which
    provides that citizen suits may not be commenced where a “responsible party
    is diligently conducting a removal action” pursuant to a consent decree with
    the EPA. 
    42 U.S.C. § 6972
    (b)(2)(B)(iv). First, that the district court abused
    its discretion by considering whether the City’s actions under the Consent
    Decree are removal actions because, according to Gordon Plaza, the City
    raised this defense in a reply brief. Second, that the court erroneously
    determined the City’s actions under the Decree are “removal” actions. And
    third, that the court erred when it found the City has been “diligently”
    performing those actions.
    A.
    We begin with the threshold issue whether the City first asserted in a
    reply brief its defense that its actions under the Consent Decree constituted
    “removal” actions. In the Fifth Circuit, a district court abuses its discretion
    when it considers new arguments raised for the first time in a reply brief
    without providing the “non-movant an adequate opportunity to respond
    prior to a ruling.” Thompson v. Dall. City Att’y’s Off., 
    913 F.3d 464
    , 471 (5th
    Cir. 2019) (quoting Vais Arms, Inc. v. Vais, 
    383 F.3d 287
    , 292 (5th Cir. 2004)).
    Gordon Plaza contends that “[n]either the City nor the District Court
    identified any instance in which the City claimed—before that reply—to
    have conducted a ‘removal action,’ whether in the case under appeal or in
    the preceding case.”
    The City first asserted its defense that the Consent Decree with the
    EPA barred citizen suits under RCRA in the 2018 Litigation, and the court
    identified   “[t]he    question   before     [it]    [as]     whether   defendants
    are . . . ‘diligently conducting a removal activity’ as required to preclude a
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    citizen suit.” Gordon Plaza I, 
    2019 WL 2330450
    , at *3 (quoting 
    42 U.S.C. § 6972
    (b)(2)(B)(iv)). The City stated that it was “asserting these same
    grounds for dismissal” in its motion to dismiss in the proceedings below.
    The City further explained that “Gordon Plaza’s citizen suit is barred by the
    RCRA since the EPA has been proceeding with a removal action . . . and has
    entered a Consent Decree with the City . . . in 2008 which has extended
    additional remediation and with which the City is in compliance.” In
    asserting that Gordon Plaza’s suit was statutorily barred, the City cited 
    42 U.S.C. § 6972
    (b)(2)(B)(iv). Notably, in its opposition to the motion to
    dismiss, Gordon Plaza recognized that “Section 6972(b)(2)(B)(iv) would
    only apply . . . if—in the present tense—‘a responsible party [e.g., the City]
    is diligently conducting a removal action,’” and argued that “[n]either EPA
    nor any other party . . . is actually engaging in a removal action because the
    agency finished the removal actions.”
    Because we find that the City raised its defense under 
    42 U.S.C. § 6972
    (b)(2)(B)(iv) in both the 2018 Litigation and in its motion to dismiss
    in the instant suit, we hold that the district court did not abuse its discretion
    by considering it.
    B.
    We turn next to Gordon Plaza’s contention that this citizen suit is not
    barred because the City’s obligations under the 2008 Consent Decree are not
    “removal” actions. Gordon Plaza sets forth two arguments. First, that we
    should accord deference to an EPA statement in the preamble to a proposed
    rule, which, according to Gordon Plaza, represents the EPA’s authoritative
    interpretation of “removal” to exclude “operation and maintenance”
    activities. Second, that the City’s activities under the Consent Decree do not
    fall within the statutory definition of a “removal” action. Neither contention
    has merit.
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    1.
    We turn first to the issue whether the EPA has provided an
    authoritative interpretation of “removal” to which we should accord
    deference under Chevron, U.S.A., Inc. v. Natural Resources Defense Council,
    Inc., 
    467 U.S. 837
     (1984), or, in the alternative, a persuasive interpretation
    under Skidmore v. Swift & Co., 
    323 U.S. 134
     (1944). We find that deference
    is not appropriate under either framework.
    When reviewing an agency’s legal construction of the statute that it
    administers, we apply the two-step analysis established by the Supreme
    Court in Chevron. See 
    467 U.S. at
    842–44. But before leaping into the
    Chevron two-step, we must determine whether the agency construction is of
    a form that warrants application of the framework at all. The Supreme Court
    has instructed federal courts not to reach Chevron steps one or two unless the
    court first determines “the agency interpretation claiming deference was
    promulgated in the exercise of that authority” to make rules carrying the
    force of law. United States v. Mead Corp., 
    533 U.S. 218
    , 227 (2001); see also
    Dhuka v. Holder, 
    716 F.3d 149
    , 155 (5th Cir. 2013) (noting the “predicate
    requirement that the agency have issued its interpretation in a manner that
    gives it the force of law”). We refer to this threshold inquiry as “Chevron
    step zero.” See Ali v. Barr, 
    951 F.3d 275
    , 279 (5th Cir. 2020) (citing Cass R.
    Sunstein, Chevron Step Zero, 
    92 Va. L. Rev. 187
    , 191 (2006)).
    Gordon Plaza argues that the “EPA has spoken directly to the issue”
    before us in a proposed rule—specifically, the EPA’s 2002 proposal to delete
    a particular Superfund site from the NPL. See EPA, Notice of Intent to Delete
    the Del Norte County Pesticide Storage Area Superfund Site from the National
    Priorities List, 
    67 Fed. Reg. 51,528
     (Aug. 8, 2002). Gordon Plaza points to
    one   sentence    in   the   preamble      to   that   proposed   rule:   The
    “CERCLA . . . defines response as removal and remedial actions, and does
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    not include operation and maintenance activities.” 
    Id.
     According to Gordon
    Plaza, this sentence presents the EPA’s “legal conclusion” that “removal”
    action excludes “operation and maintenance.”
    Notably, the proposed rule does not indicate an intention to clarify
    rights and obligations generally with the force of law but rather to set out a
    fact-bound inquiry into the application of a regulation to a particular party—
    here, the provision for NPL site deletion in the National Oil and Hazardous
    Substances Pollution Contingency Plan (“NCP”), 
    40 C.F.R. § 300.425
    (e).
    See Chrysler Corp. v. Brown, 
    441 U.S. 281
    , 302 (1979); see also Mead, 
    533 U.S. at 226
    . And the specific language at issue does not purport to provide an
    agency position on the statutory definition of a “removal” action but to
    parrot Congress’s existing definition for a “response” action. In any event,
    we have long held that “proposed regulations are entitled to no deference
    until final.” Howard Hughes Co. v. Comm’r, 
    805 F.3d 175
    , 185 (5th Cir. 2015)
    (quoting In re Appletree Mkts., Inc., 
    19 F.3d 969
    , 973 (5th Cir. 1994)). This is,
    in part, because “a proposed regulation does not represent an agency’s
    considered interpretation of its statute.”          Commodity Futures Trading
    Comm’n v. Schor, 
    478 U.S. 833
    , 845 (1986). And that logic is at play here
    where the purported legal conclusion from the preamble of the proposed rule
    fails to materialize in the finalized rule.
    The final rule following the proposed rule consists of one sentence:
    “Table 1 of appendix B to part 300 is amended by removing the entry for”
    the particular site at issue. EPA, Notice of Deletion for the Del Norte County
    Pesticide Storage Area Superfund Site from the National Priorities List, 
    67 Fed. Reg. 58,731
     (Sept. 18, 2002). The introductory summary of the final rule
    includes a notably distinct version of the language at issue: “The EPA and
    the State of California . . . have determined that all appropriate response
    actions under CERCLA, other than Operation and Maintenance and Five-
    Year reviews, have been completed.” 
    Id.
     (emphasis added). The addition of
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    the phrase “other than” appears to undermine Gordon Plaza’s position by
    suggesting that operation and maintenance activities are included within the
    scope of response activities.
    Gordon Plaza persists that the EPA implicitly implemented an
    interpretation of “removal” that excludes operation and maintenance
    activities because the NCP only allows for sites to be deleted from the NPL
    “where no further response is appropriate,” 
    40 C.F.R. § 300.425
    (e), and
    “response” is defined to include “removal,” 
    42 U.S.C. § 9601
    (25). But
    obvious separation-of-powers principles prevent us from deferring to
    language in the preamble of a proposed regulation that the EPA declined to
    include in its final rule, which itself only purported to provide an individual,
    ad hoc determination. Appletree Mkts., 
    19 F.3d at 973
    . Cf. Kaufman v. Nielsen,
    
    896 F.3d 475
    , 484–85 (D.C. Cir. 2018) (declining to accord Chevron
    deference to agency letter “singularly focused” on the application of a
    regulation to one individual and not “clearly intended to have general
    applicability and the force of law” (citation omitted)).
    Because the language in the proposed rule does not provide an
    interpretation of “removal” carrying the force of law, it fails to pass Chevron
    step zero and we do not accord deference under that framework.
    Gordon Plaza argues that the language in the proposed rule is at least
    entitled to Skidmore deference, which applies to “agency interpretations of
    statutes they administer that do not carry the force of law.” Luminant
    Generation Co. v. EPA, 
    675 F.3d 917
    , 928 (5th Cir. 2012). Skidmore deference
    follows from the understanding that agency constructions, even where not
    authoritative, are entitled to respect insofar as they “constitute a body of
    experience and informed judgment to which courts and litigants may
    properly resort for guidance.” Skidmore, 
    323 U.S. at 140
    . However, with the
    deferential thumb removed from the scale, only the “well-reasoned views of
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    the agencies implementing a statute” warrant respect. Mead, 
    533 U.S. at 227
    (quoting Bragdon v. Abbott, 
    524 U.S. 624
    , 642 (1998)). The weight provided
    to the agency’s interpretation “will depend upon 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 power to
    persuade, if lacking power to control.” Skidmore, 
    323 U.S. at 140
    .
    The EPA’s proposed rule lacks the necessary markers of persuasion.
    This statement about the statutory definition of “response” does not purport
    to interpret an ambiguous provision of CERCLA, and does not meaningfully
    set forward as the subject of notice-and-comment rulemaking the
    interpretation of an ambiguous statute. Rather, the language at issue is
    housed in the preamble of a proposed rule that purports to call for comment
    on the ad hoc deletion of a site from the NPL. The proposed rule is devoid
    of statutory interpretation or discussion. Its language does not indicate intent
    to provide a generally applicable interpretation of “removal.” The sentence
    at issue—language that was not adopted in the final rule—lacks the hallmarks
    of persuasion and is not entitled to Skidmore deference.
    We hold that neither Chevron nor Skidmore deference is warranted.
    2.
    Gordon Plaza asserts that CERCLA’s definition of “removal” does
    not encompass the City’s obligations under the Consent Decree. The
    classification of a “removal” action is a question of law. United States v. W.R.
    Grace & Co., 
    429 F.3d 1224
    , 1234 (9th Cir. 2005).
    The Consent Decree refers to the City’s obligations as “proper
    operation and maintenance practices and institutional controls.” The parties
    agree that the City’s activities are “maintenance” actions. The essence of
    their dispute is whether the City’s maintenance actions fall within the scope
    of “removal” actions under CERCLA.
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    The Decree provides that, “[u]nless otherwise expressly provided,”
    terms used in the Decree adopt the definition provided in CERCLA or in
    regulations promulgated thereunder. The Decree does not define “removal
    action” or “operation and maintenance practices.” CERCLA does not
    provide definitions for the terms “operation” or “maintenance” but defines
    the term “removal” as:
    The cleanup or removal of released hazardous substances from
    the environment, such actions as may be necessary 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 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, [and] temporary
    evacuation and housing of threatened individuals not otherwise
    provided for . . . .
    
    42 U.S.C. § 9601
    (23). We have recognized that “Congress intended that the
    term ‘removal action’ be given a broad interpretation.” Geraghty & Miller,
    Inc. v. Conoco Inc., 
    234 F.3d 917
    , 926 (5th Cir. 2000) (quoting Kelley v. E.I.
    DuPont de Nemours & Co., 
    17 F.3d 836
    , 843 (6th Cir. 1994)), abrogated on other
    grounds as recognized by Vine Street LLC v. Borg Warner Corp., 
    776 F.3d 312
    ,
    317 (5th Cir. 2015); see also United States v. Lowe, 
    118 F.3d 399
    , 402 (5th Cir.
    1997) (noting the term is “defined broadly”). The definition of removal
    encompasses more than the “cleanup . . . of released hazardous substances
    from the environment”; it also covers the “monitor[ing], assess[ing], and
    evaluat[ion of] the . . . threat of release of hazardous substances” and the
    catchall “taking of such other actions . . . to prevent, minimize, or mitigate
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    damage . . ., which may otherwise result from a . . . threat of release” of
    hazardous substances. § 9601(23). Accordingly, we have observed that
    removal is “aimed at containing and cleaning up hazardous substance
    releases.” Lowe, 
    118 F.3d at 403
     (emphasis added). And this understanding
    is reflected in the NCP, which lists examples that, “as a general rule,” fall
    within the scope of a removal action, including the “[c]ontainment . . . of
    hazardous materials—where needed to reduce the likelihood of human,
    animal, or food chain exposure.” 
    40 C.F.R. § 300.415
    (e)(8).
    The definition of “removal” action encompasses the City’s ongoing
    obligations under the Consent Decree. The Decree states its objective is to
    task the City with fulfilling certain obligations in order to “protect the
    [EPA’s] remedy on the Site and, thereby, the public health or welfare or the
    environment at the Site.” In parallel language, “removal” broadly includes
    the “taking of such other actions as may be necessary to prevent, minimize,
    or mitigate damage to the public health or welfare or to the environment.”
    
    42 U.S.C. § 9601
    (23).
    The Decree specifically requires the City to “maintain a stable
    vegetative cover.” The vegetative cover prevents erosion of the soil cap and
    geotextile mat. And “failure to maintain the vegetative cover” risks that the
    soil cap and geotextile mat will be “breached or degraded.” The EPA
    installed the soil cap and geotextile mat to protect against “the release or
    threatened release of hazardous substances at the [Site].”          “Because
    contaminants have been left in place beneath the geotextile mat,” and
    “[b]ecause [the] lack of mowing/maintenance . . . is likely to damage the
    subsurface geotextile mat,” “proper operation and maintenance practices
    and institutional controls are required to maintain the integrity of the cap.”
    Accordingly, the City is obligated to mow vegetation “at least twice per year”
    and to “use its available authorities to (a) require that landowners otherwise
    maintain the grass vegetation on their properties, or (b) undertake the
    14
    Case: 21-30294     Document: 00516188120            Page: 15    Date Filed: 02/01/2022
    No. 21-30294
    necessary maintenance directly.” The City was also required to pass an
    ordinance requiring property owners to notify the City if they intend to
    excavate soil beneath the geotextile mat, and to “direct that all of its agencies
    and departments” incorporate the Technical Abstract as standard operating
    procedure within the Site.
    In sum, the City must maintain the vegetative cover, which protects
    the integrity of the geotextile mat, and thereby prevents the contaminants
    underneath from being released. This obligation easily falls within the
    definition of a “removal” action to include “the taking of such [ ] actions as
    may be necessary to prevent, minimize, or mitigate damage . . . , which may
    otherwise result from a release or threat of release.” 
    42 U.S.C. § 9601
    (23).
    Gordon Plaza wholly fails to engage with the statutory text, except to
    point out that the definition of “removal” does not explicitly include the
    terms “operation and maintenance.” Gordon Plaza then points to EPA
    guidance and regulations, terminology in the 2008 Consent Decree and 2018
    Five-Year Review, and dicta in our precedent—all of which Gordon Plaza
    alleges contradicts our reading of the statutory definition of “removal.”
    First, Gordon Plaza cites to language in an EPA regulation defining
    “[o]peration and maintenance” as “measures required to maintain the
    effectiveness of response actions,” and separately defining “[r]espond or
    response” as “remove, removal, remedy, or remedial action, including
    enforcement activities related thereto.” 
    40 C.F.R. § 300.5
    . But neither
    definition informs the definition of “removal” nor whether “removal”
    actions exclude “[o]peration and maintenance.” Similarly, Gordon Plaza’s
    citation to the NCP’s provision that operation and maintenance measures
    “are initiated after the remedy has achieved the remedial action objectives”
    is not helpful because CERCLA separately defines “remedy” and
    “removal.” See 
    40 C.F.R. § 300.435
    (f)(1); 
    42 U.S.C. § 9601
    (23), (24).
    15
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    No. 21-30294
    Second, Gordon Plaza points to EPA Superfund guidance separately
    discussing removal actions and “post-removal site controls” (“PRSCs”).
    See EPA, Superfund Removal Procedures: The Removal Response Decision, Site
    Discovery to Response Decision, p. 8 (June 1998). But this guidance is not
    illuminating because the EPA defines PRSCs as “those activities that are
    necessary to sustain the integrity of a [ ] removal action following its
    conclusion” and concludes that a PRSC “may be a removal . . . action under
    CERCLA.” 
    400 C.F.R. § 300.5
    .
    Third, Gordon Plaza argues that the language in the Decree and the
    2018 Five-Year Review Report reflect that the EPA does not consider the
    City’s activities to be “removal” actions but “Post-Removal Activities” and
    “maintenance and protect[ion]” actions. But we have already explained that
    the City’s “maintenance” of the vegetative cover and “protection” of the
    geotextile mat falls within the statutory definition of a “removal” action.
    Finally, Gordon Plaza cites to dicta in our precedent that “a ‘removal’
    is generally understood to be a short-term response.” Lowe, 
    118 F.3d at 402
    .
    This generality arises from caselaw distinguishing the statutory definitions of
    “removal” and “remedial” actions. E.g., Voluntary Purchasing Grps., Inc. v.
    Reilly, 
    889 F.2d 1380
    , 1382 n.4 (5th Cir. 1989). Whether removal actions are
    generally short- or long-term by comparison to remedial actions does not
    determine the specific question before us. Cf. W.R. Grace & Co., 
    429 F.3d at 1244
     (rejecting that removal actions must be short-term); Village of Milford v.
    K-H Holding Corp., 
    390 F.3d 926
    , 934 (6th Cir. 2004) (same).
    In short, Gordon Plaza has failed to point to authority clearly
    interpreting “removal” to exclude operation and maintenance activities. We
    hold that the City’s maintenance obligations under the Decree are
    “removal” actions under CERCLA.
    16
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    No. 21-30294
    C.
    We turn next to Gordon Plaza’s contention that the City was not
    “diligently” conducting a removal action. We hold that Gordon Plaza has
    failed to plausibly plead this allegation.
    At the threshold, we note that the Consent Decree provides a
    framework for ongoing monitoring of the City’s performance of its
    obligations under the Decree. Specifically, the Decree provides for annual
    reporting, EPA oversight and 5-year review inspections, stipulated penalties
    if the City is found in noncompliance with its provisions, and dispute
    resolution culminating in court. We take note of these regular reporting and
    inspection requirements because RCRA’s statutory bar on citizen suits is
    “intended to avert citizen suit interference with state and federal
    enforcement activities.” Chico Serv. Station, Inc. v. Sol P.R. Ltd., 
    633 F.3d 20
    , 28 (1st Cir. 2011). We observed in the context of the Clean Water Act—
    which we have found “requires like interpretation” to the citizen-suit
    provisions of RCRA, Cox v. City of Dallas, 
    256 F.3d 281
    , 308 (5th Cir.
    2001)—that “the citizens’ role in enforcing the Act is ‘interstitial’ and
    should not be ‘intrusive,’” La. Env’t Action Network v. City of Baton Rouge,
    
    677 F.3d 737
    , 740 (5th Cir. 2012) (per curiam) (quoting Gwaltney of
    Smithfield, Ltd. v. Chesapeake Bay Found., Inc., 
    484 U.S. 49
    , 61 (1987)). Here,
    Gordon Plaza’s complaint addresses the same environmental concerns as the
    Consent Decree. Cf. A-C Reorg. Tr. v. E.I. DuPont de Nemours & Co., 
    968 F. Supp. 423
    , 430–31 (E.D. Wis. 1997) (finding RCRA citizen-suit not barred by
    consent order where plaintiff’s claims went beyond consent order).
    The district court found that “[n]othing in the complaint indicates
    that the City fails to comply with the consent decree, or that the City is not
    diligently conducting a removal action in abiding by the consent decree.”
    The complaint does not allege that the City is in violation of the Decree. It
    17
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    No. 21-30294
    alleges that “no responsible party is diligently conducting a removal action”
    without any factual allegations in support. In an attachment to the complaint,
    Gordon Plaza included a photo of a person lifting a tarp on the ground next
    to a fenced off area of vegetation. The photo is dated May 10, 2016, and
    captioned: “Exposed geotextile mat (indicating the interface between fill and
    contaminated soil).” Gordon Plaza also points to a statement from the
    EPA’s 2018 Five-Year Review Report (which was attached to the City’s
    responsive     pleadings):    “The      City      reports    quarterly    grass
    cutting . . ., however, during the site inspection, heavily overgrown
    vegetation . . . was observed.”
    Gordon Plaza argues that it has thus plausibly alleged “deficient
    performance [ ] not adher[ing] to the actions ordered by the Decree.” We
    disagree. The photo attached to Gordon Plaza’s complaint is dated to 2016.
    Gordon Plaza concedes that the EPA has since reviewed the Site—in 2018—
    and found the City in compliance with the Consent Decree. Specifically, that
    the “soil barrier that covers the entire site is in place and expected to remain
    in place over time, restricting exposure to the remaining subsurface
    contaminants associated with the site.” And that the City was mowing the
    vegetation more frequently than required. The EPA did not record exposed
    geotextile mat. The note of “overgrown vegetation” did not prevent the
    EPA’s finding the City in compliance with the Decree.
    “Factual allegations must be enough to raise a right to relief above the
    speculative level.” Gonzalez v. Kay, 
    577 F.3d 600
    , 603 (5th Cir. 2009)
    (quoting Twombly, 
    550 U.S. at 555
    ). “[W]here the well-pleaded facts do not
    permit the court to infer more than the mere possibility of misconduct, the
    complaint has alleged—but it has not ‘show[n]’—that the pleader is entitled
    to relief.” Iqbal, 
    556 U.S. at 679
     (quoting Fed. R. Civ. P. 8(a)(2)). Here,
    the complaint relies on a single conclusory statement and a photo predating
    the EPA’s conclusion that the City is in compliance with the Consent
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    No. 21-30294
    Decree. We hold that Gordon Plaza has failed to plausibly allege that the City
    is not diligently performing a removal action. 3
    IV.
    Finally, Gordon Plaza contends the lower court improperly dismissed
    the complaint without leave to amend. We disagree.
    “Whether leave to amend should be granted is entrusted to the sound
    discretion of the district court, and that court’s ruling is reversible only for
    an abuse of discretion.” Heinze v. Tesco Corp., 
    971 F.3d 475
    , 485 (5th Cir.
    2020) (quoting Pervasive Software Inc. v. Lexware GmbH, 
    688 F.3d 214
    , 232
    (5th Cir. 2012)). But a district court may only deny leave “for a substantial
    reason, such as undue delay, repeated failures to cure deficiencies, undue
    prejudice, or futility.” Stevens v. St. Tammany Par. Gov’t, 
    17 F.4th 563
    , 575
    (5th Cir. 2021) (quoting U.S. ex rel. Spicer v. Westbrook, 
    751 F.3d 354
    , 367 (5th
    Cir. 2014)). Absent such factors, leave to amend should be “freely given.”
    Fed. R. Civ. P. 15(a).
    The district court denied Gordon Plaza’s second attempt to plead its
    claims based on its findings of undue delay, bad faith or dilatory motive,
    repeated failures to cure deficiencies, and undue prejudice to the City. The
    3
    Gordon Plaza also argues that the issue of “diligence” is a question of fact that
    cannot be determined at the motion to dismiss stage. We disagree. We have explicitly
    declined to determine whether “diligence” is “a fact-intensive question that can only be
    answered after the proper development of a record.” See La. Env’t Action Network, 
    677 F.3d at 750
     (considering the diligent-prosecution bar on citizen-suits under the Clean
    Water Act, 
    33 U.S.C. § 1365
    (b)(1)(B)). Gordon Plaza points to our holding in Tanglewood
    East Homeowners v. Charles-Thomas, Inc., where we found that “diligence” under
    § 6972(b)(2)(B) “is a fact issue [ ] that the complainants cannot be expected to prove[] at
    the pleading stage.” 
    849 F.2d 1568
    , 1574 (5th Cir. 1988). But Tanglewood did not involve
    a consent decree binding the responsible party’s conduct, government oversight, reporting
    requirements, and site examinations; nor did it provide for penalties and dispute resolution
    in the case of a violation of the consent decree. We find those differences persuasive here.
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    Case: 21-30294     Document: 00516188120              Page: 20   Date Filed: 02/01/2022
    No. 21-30294
    court explained that the 2018 Litigation and the City’s responsive pleading
    in the instant suit placed Gordon Plaza on notice of the materiality of the issue
    whether the City was diligently engaged in a removal action and the statutory
    bar under § 6972(b)(2)(B)(iv). Thus the court found the request for leave to
    amend unduly delayed and in bad faith.
    As discussed, the City properly raised its defense under RCRA’s
    statutory bar in both its responsive pleading and in the 2018 Litigation. Yet,
    Gordon Plaza failed to timely amend its pleadings and further failed to
    indicate with any particularity the factual allegations with which it proposes
    to amend its complaint. Indeed, Gordon Plaza implied in its briefing before
    us that it cannot provide more detailed allegations “without the benefit of
    discovery.” Based on Gordon Plaza’s repeated failure to cure its pleadings
    and lack of diligence to present any indication of the factual allegations with
    which it seeks to amend its complaint, we hold that the district court did not
    abuse its discretion in denying leave to amend.
    *        *         *
    We AFFIRM.
    20