Blackstone Headwaters Coal. v. Gallo Builders, Inc. ( 2021 )


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  •           United States Court of Appeals
    For the First Circuit
    No. 19-2095
    THE BLACKSTONE HEADWATERS COALITION, INC.,
    Plaintiff, Appellant,
    v.
    GALLO BUILDERS, INC.; ARBORETUM VILLAGE, LLC;
    STEVEN A. GALLO; and ROBERT H. GALLO,
    Defendants, Appellees.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. Timothy S. Hillman, U.S. District Judge]
    Before
    Howard, Chief Judge,
    Barron, Circuit Judge,
    and Katzmann, Judge.*
    James P. Vander Salm, with whom Law Office of James P. Vander
    Salm was on brief, for appellant.
    William D. Jalkut, with whom Fletcher Tilton P.C. was on
    brief, for appellees.
    April 26, 2021
    * Of the United States Court of International Trade, sitting
    by designation.
    BARRON, Circuit Judge.            In May 2016, the Blackstone
    Headwaters    Coalition,      Inc.       ("Blackstone"),      a     non-profit
    environmental organization, sued four defendants (two companies,
    Gallo Builders, Inc. ("Gallo Builders") and Arboretum Village, LLC
    ("Arboretum   Village");     and   two    individuals,    Steven    Gallo   and
    Robert   Gallo)   involved    in   the    development    of   a    residential
    construction site in Worcester, Massachusetts.           Blackstone brought
    the suit in the District of Massachusetts pursuant to the citizen
    suit provision of the Federal Water Pollution Control Act, 
    33 U.S.C. § 1365
    (a), which is better known as the Federal Clean Water
    Act, 
    33 U.S.C. § 1251
     et seq. ("the Federal CWA").
    The suit alleged in Count I of Blackstone's complaint
    that Gallo Builders, Steven Gallo, and Robert Gallo had violated
    the Federal CWA based on a failure by Gallo Builders to obtain
    from the U.S. Environmental Protection Agency ("EPA") what is known
    as a Construction General Permit, which the Federal CWA and certain
    of its implementing regulations allegedly required that company to
    have due to its connection to the work that was being done at the
    construction site in Worcester.          See 
    33 U.S.C. § 1342
    ; 
    40 C.F.R. §§ 122.26
    (b)(14)(x), 122.28;       2012      National   Pollutant    Discharge
    Elimination System General Permit for Discharges from Construction
    - 2 -
    Activities § 1.1.a ("Construction General Permit").1               The suit
    alleged in Count II       of Blackstone's       complaint that all four
    defendants -- Gallo Builders, Arboretum Village, Robert Gallo, and
    Steven Gallo -- had violated the Federal CWA and certain of its
    implementing regulations        by failing to prevent sediment-laden
    stormwater discharges from flowing from that construction site
    into waters that lead to the Blackstone River.
    The   District   Court     granted   summary   judgment   in   the
    defendants' favor as to the first of these two claims.                    The
    District Court ruled that, because Arboretum Village had the
    requisite Construction General Permit, Gallo Builders,               Steven
    Gallo,   and   Robert   Gallo   had   committed   at   most   a   "technical
    violation" of the Federal CWA and its implementing regulations in
    failing to secure such a permit for Gallo Builders and that a
    violation of that kind was not itself actionable via the Federal
    CWA's citizen suit provision.
    The District Court also granted summary judgment to the
    defendants on Blackstone's other claim, which was set forth in
    Count II of the complaint.        The District Court based this ruling
    on section 309(g)(6)(A)(ii) of the Federal CWA, codified at 
    33 U.S.C. § 1319
    (g)(6)(A)(ii).         That provision of the Federal CWA
    1 Available at https://www.epa.gov/sites/production/files/
    2016-09/documents/cgp2012_finalpermitpart1-9-updatedurl.pdf.
    - 3 -
    bars an otherwise permissible citizen suit under that same statute
    from going forward if a state government has already commenced and
    is    diligently      prosecuting      a    sufficiently       related       enforcement
    action under a law comparable to section 309(g) of the Federal
    CWA.       See 
    id.
    The District Court concluded that this preclusion bar in
    the Federal CWA applied here because of a prior enforcement action
    that the Massachusetts Department of Environmental Protection
    ("the MassDEP") had brought against Arboretum Village based on
    alleged sediment-laden stormwater discharges at the construction
    site.        In   that     same   order,     the   District     Court     also     denied
    Blackstone's         cross-motion      for       summary      judgment,       in     which
    Blackstone had sought a ruling that, as a matter of law, the
    MassDEP's prior enforcement action against Arboretum Village did
    not    trigger       the   statutory       preclusion    bar    in    the     case   that
    Blackstone was bringing.
    Blackstone now appeals from these rulings.                  We affirm in
    part and reverse in part.2
    I.
    The     following     facts        are    not    in    dispute.        Since
    approximately         2006,   the    four     defendants       --    Gallo    Builders,
    Arboretum Village, Steven Gallo, and Robert Gallo -- have been
    We acknowledge with appreciation the assistance of the amici
    2
    curiae in this case.
    - 4 -
    collectively     involved    in   constructing     a   large     residential
    development known as Arboretum Village Estates at a site in
    Worcester, Massachusetts. In June 2013, an analyst for the MassDEP
    who was monitoring the site for compliance with Massachusetts state
    environmental laws reported having observed "[d]ischarge(s) of
    silt-laden runoff (measured from 200-645 Nephelometric Turbidity
    Units ('NTUs'))3 from unstable, eroded suspended soils at the Site
    to   an   unnamed,   perennial    stream . . . [that     feeds    into]   the
    Blackstone River."     The MassDEP thereafter issued what is known as
    a Unilateral Administrative Order ("UAO"), which named Arboretum
    Village    as   respondent   on   June   21,   2013;   identified    various
    violations that it had committed at the site; threatened to impose
    civil penalties on the company; and ordered that it undertake a
    number of remedial actions.4
    Construction at the site came to a halt in the wake of
    the UAO.    Arboretum Village thereafter administratively appealed
    the UAO to the MassDEP's Office of Appeals and Dispute Resolution.
    In late 2014, with the administrative appeal of the UAO
    pending, the MassDEP and Arboretum Village executed a settlement
    in the form of       an Administrative Consent Order with Penalty
    3NTUs are a measure of water turbidity taken with                    an
    instrument that gauges the reflectivity of light off water.
    4While the UAO named Arboretum Village as respondent, it was
    mailed to Steven Gallo in his capacity as President of Arboretum
    Village.
    - 5 -
    ("ACOP").   The MassDEP's Commissioner approved the ACOP in a Final
    Decision on December 22, 2014.             The Final Decision explained that,
    under the ACOP, Arboretum Village would be required, among other
    things, to "pay an $8,000.00 civil administrative penalty to the
    Commonwealth," to undertake certain remedial measures at the site,
    and to agree to "pay stipulated penalties and/or be subject to
    additional high level enforcement action from the [MassDEP] if any
    further    discharges      of     turbid    stormwater       runoff    to    wetlands
    resource areas in excess of 150 NTUs occur."
    More than a year later, on May 6, 2016, Blackstone filed
    this suit in the District of Massachusetts under the citizen suit
    provision     of    the    Federal      CWA.     See    
    33 U.S.C. § 1365
    (a).
    Blackstone's "mission is to restore and protect water quality and
    wildlife    habitat        in     the      Blackstone     River . . . and          its
    tributaries."       Its members use and enjoy the Blackstone River and
    adjacent      waters       "for      recreation,        sightseeing,         wildlife
    observation, and other activities," and it claims to "have a
    recreational, aesthetic, historical, and environmental interest"
    in those waters.
    Blackstone alleged in Count I of its complaint that Gallo
    Builders, Robert Gallo, and Steven Gallo had violated 
    33 U.S.C. §§ 1311
    (a),        1342,   and     accompanying     regulations,        
    40 C.F.R. §§ 122.26
    (b)(14)(x), 122.28, by failing to obtain a Construction
    General Permit for Gallo Builders from the EPA for the site at
    - 6 -
    issue,   given     that    Gallo     Builders      was    an    operator    of     the
    construction site and that the site disturbed five or more acres
    of land and discharged pollutants from a point source into waters
    of the United States.            Blackstone alleged in Count II of the
    complaint that Gallo Builders, Arboretum Village, Robert Gallo,
    and   Stephen     Gallo    had   violated     
    33 U.S.C. §§ 1311
    (a),      (e),
    1365(f)(1), (7), and 1342 by failing to comply with numerous
    provisions   of    the    Construction    General        Permit    that    Arboretum
    Village had obtained from the EPA due to "longstanding and habitual
    neglect of erosion and sediment control" at the construction site.
    With respect to the latter claim, Blackstone alleged
    that "[a]s a result of Defendants' [Federal] CWA violations,
    sediment-laden stormwater runoff from the Site is polluting waters
    of the United States, particularly the Blackstone River, its
    tributaries,      and     wetlands    adjacent      to     those    tributaries."
    Blackstone alleged that sediment-laden discharges had occurred "on
    days including but not limited to October 16, 2015, January 10,
    2016, February 3, 2016, February 16, 2016, February 24, 2016,
    February 25, 2016, March 1, 2016, and April 7, 2016."
    Blackstone       sought    a   declaratory          judgment    that    the
    defendants were in violation of the Federal CWA by both failing to
    obtain Construction General Permit coverage for Gallo Builders and
    by violating the conditions of the Construction General Permit
    held by Arboretum Village.           Blackstone also sought an injunction
    - 7 -
    prohibiting further violations of the Federal CWA, requiring that
    the defendants restore any polluted wetlands and waters, and
    requiring that the defendants report future issues with stormwater
    discharges at the site to the EPA and to Blackstone.        In addition,
    Blackstone sought an assessment of civil penalties under section
    309(d) of the Federal CWA, 
    33 U.S.C. § 1319
    (d), and an award of
    attorneys' fees.
    On August 30, 2016, all four defendants jointly moved to
    dismiss both claims that Blackstone had brought against them in
    its suit on the ground that each of the claims was barred by the
    statutory preclusion provision of the Federal CWA set forth in
    section 309(g)(6)(A)(ii), which bars "civil penalty action[s]"
    brought by either the federal government under section 309(d) or
    by citizens via citizen suits insofar as such actions concern "any
    violation . . . with respect to which a State has commenced and is
    diligently prosecuting an action under a State law comparable this
    subsection."     
    33 U.S.C. § 1319
    (g)(6)(A)(ii).         The motion also
    sought the dismissal of the claim set forth in Count I of the
    complaint, which concerned Construction General Permit coverage,
    on   the   independent   ground   that    Arboretum   Village   alone   had
    operational control over the construction site and thus that only
    it needed to obtain (and had already obtained) a Construction
    General Permit from the EPA for the site.
    - 8 -
    The District Court denied the defendants' motion to
    dismiss Blackstone's two claims but instructed the parties to
    engage in a limited period of discovery concerning whether section
    309(g)(6)(A)(ii) of the Federal CWA precluded them from going
    forward.        At the close of that limited discovery period, the
    defendants then proceeded to move for summary judgment as to both
    of Blackstone's claims.
    The    motion   for     summary     judgment,      which     Blackstone
    opposed, again asserted that section 309(g)(6)(A)(ii) barred both
    of Blackstone's claims.           In addition, Blackstone filed a cross-
    motion requesting "summary judgment that this action is not barred
    by   the        'diligent        prosecution'         provision     of      Section
    309(g)(6)(A)(ii) of the Federal Clean Water Act."
    On September 30, 2018, the District Court issued an order
    that both denied Blackstone's cross-motion for summary judgment
    and partially granted the defendants' summary judgment motion,
    insofar    as    that   motion    concerned     the    claim   in   Count    II   of
    Blackstone's complaint, which alleged unauthorized sediment-laden
    stormwater discharges.       Blackstone Headwaters Coal., Inc. v. Gallo
    Builders, Inc., No. 16-cv-40053-TSH, 
    2018 WL 4696749
    , at *2 (D.
    Mass. Sept. 30, 2018); see Blackstone Headwaters Coal., Inc. v.
    Gallo Builders, Inc., No. 16-cv-40053-TSH, 
    2018 WL 5795832
    , at *1
    (D. Mass. Oct. 31, 2018) (clarifying that the earlier summary
    judgment ruling did not affect the claim concerning Gallo Builders'
    - 9 -
    failure to obtain permit coverage).         The District Court determined
    that the MassDEP had "exercised its enforcement powers with respect
    to the Site" both in issuing the UAO and in executing the ACOP.
    Blackstone, 
    2018 WL 4696749
    , at *2.            The District Court further
    found that the ACOP imposed "a series of enforceable obligations
    on Defendants designed to bring the Site into compliance" and that
    the MassDEP had, after executing that agreement, "monitored the
    Site . . . on an ongoing basis."         
    Id.
        Thus, the District Court
    concluded, "the cumulative actions of the MassDEP form[] the basis
    of a substantial, considered and ongoing response to the violation"
    alleged    in    Blackstone's   complaint   against   all    the    defendants
    concerning stormwater discharges, and the "circumstances of this
    case demonstrate ongoing diligent prosecution."             
    Id.
    The defendants then moved on June 28, 2019, for summary
    judgment as to the remaining claim by Blackstone, which was set
    forth in Count I of the complaint and concerned Construction
    General Permit coverage.        The District Court granted this motion,
    which Blackstone had opposed, on September 30, 2019.               It reasoned
    that the defendants were right that the claim alleged merely a
    "technical violation" of the Federal CWA and its implementing
    regulations and so was not actionable in a citizen suit under that
    statute.        Blackstone Headwaters Coal., Inc. v. Gallo Builders,
    Inc., 
    410 F. Supp. 3d 299
    , 302-03 (D. Mass. 2019).                The District
    Court explained that it regarded the alleged violation as merely
    - 10 -
    "technical" because Arboretum Village did have coverage under an
    EPA-issued Construction General Permit and both Arboretum Village
    and Gallo Builders were controlled by the same individuals --
    namely, "Robert H. Gallo, his wife Janice Gallo and their son
    Steven Gallo."    
    Id.
    The District Court entered judgment for the defendants
    on September 30, 2019, and, on October 29, 2019, Blackstone timely
    appealed.      Blackstone's     Notice    of    Appeal    referenced   (1)   the
    District    Court's     order    granting       summary     judgment   against
    Blackstone as to its claim in Count II, which concerned alleged
    unauthorized sediment-laden stormwater discharges, and denying
    Blackstone's     cross-motion     for     summary     judgment    as   to    the
    applicability    of     the   statutory        preclusion   bar   in   section
    309(g)(6)(A)(ii) of the Federal CWA; (2) the District Court's order
    granting summary judgment against Blackstone as to the claim in
    Count I, which concerned Gallo Builders' alleged failure to obtain
    the required permit coverage; and (3) the judgment of dismissal.
    We have jurisdiction to review both the District Court's
    award of summary judgment to the defendants and its denial of
    summary judgment to Blackstone.           See OneBeacon Am. Ins. Co. v.
    Com. Union Assurance Co. of Can., 
    684 F.3d 237
    , 241 (1st Cir.
    2012); see also Crowley v. Nevada ex rel. Nev. Sec'y of State, 
    678 F.3d 730
    , 734 (9th Cir. 2012) ("When the district court disposes
    of a case on cross-motions for summary judgment, we may review
    - 11 -
    both    the    grant    of     the   prevailing   party's   motion    and   the
    corresponding denial of the opponent's motion."); LM Ins. Corp. v.
    Dubuque Barge & Fleeting Serv. Co., 
    964 F.3d 1247
    , 1249 (8th Cir.
    2020) (similar).             Our review of the District Court's summary
    judgment rulings is de novo.           See Petitti v. New Eng. Tel. & Tel.
    Co., 
    909 F.2d 28
    , 30 (1st Cir. 1990) ("Both denial[s] and grants
    of summary judgment are reviewed de novo.").           "Summary judgment is
    appropriately granted where there is no genuine issue of material
    fact, and the moving party is entitled to judgment as a matter of
    law."   Vives v. Fajardo, 
    472 F.3d 19
    , 21 (1st Cir. 2007) (citing
    Fed. R. Civ. P. 56(c)).
    II.
    We start with Blackstone's challenge to the District
    Court's grant of summary judgment to the defendants on the claim
    that is set forth in Count II of Blackstone's complaint, which is
    the sediment-laden stormwater discharges claim.                  The District
    Court based this ruling on section 309(g)(6)(A)(ii) of the Federal
    CWA, which, as we have noted, bars "a civil penalty action"
    instituted pursuant to the citizen suit provision of the Federal
    CWA (or by the federal government via section 309(d)) to the extent
    that such an action concerns "any violation . . . with respect to
    which a State has commenced and is diligently prosecuting an action
    under   a     State    law    comparable   this   subsection."       
    33 U.S.C. § 1319
    (g)(6)(A)(ii).
    - 12 -
    To address this aspect of Blackstone's appeal, we need
    to assess four distinct questions that the District Court resolved,
    either   implicitly   or   explicitly     --   (1)   whether    the    prior
    enforcement action by the MassDEP was commenced and prosecuted
    "under a State law comparable" to section 309(g) of the Federal
    CWA; (2) whether, insofar as the MassDEP's enforcement action was
    commenced and prosecuted under such a comparable law, it sought to
    enforce the same violation that Blackstone claims in its suit under
    the Federal CWA; (3) whether, if those first two requirements of
    the Federal CWA's preclusion bar are satisfied, the MassDEP was
    "diligently prosecuting" the enforcement action when Blackstone
    filed its complaint; and (4) whether Blackstone's suit is "a civil
    penalty action."    We consider each of these issues in turn.
    A.
    We begin with the "comparable" law issue.           Our focus is
    twofold, as the parties' dispute with respect to the District
    Court's ruling on this issue concerns both which law the MassDEP
    brought the prior enforcement action "under" and whether that
    "law,"   once   identified,   qualifies   as   "comparable"     to    section
    309(g) of the Federal CWA.
    1.
    Massachusetts is one of just three States (the others
    being New Hampshire and New Mexico) that has not sought and
    received authorization under section 402(b) of the Federal CWA, 33
    - 13 -
    U.S.C. § 1342(b), to assume responsibility for administering the
    Federal CWA's National Pollution Discharge Elimination System
    permit program -- which includes Construction General Permits --
    within its borders.      Thus, this is not a case in which the relevant
    state enforcement action -- the one brought by the MassDEP that
    resulted in the UAO and then the ACOP and the Final Decision --
    was brought pursuant to a state law that itself administers the
    Federal CWA.       See, e.g., Paolino v. JF Realty, LLC, 
    830 F.3d 8
    ,
    11-12 (1st Cir. 2016) (discussing enforcement activity by the Rhode
    Island Department of Environmental Management under the state-
    assumed    Rhode    Island    Discharge       Elimination      System   permitting
    program); see also 133 Cong. Rec. 1,264 (1987) (statement of Sen.
    Chafee) ("[I]f a State has received authorization under section
    402 to implement a particular permitting program . . . it [can]
    prosecute a violation of Federal law."); 131 Cong. Rec. 15,635-38
    (1985)    (statement   of     Sen.    Wallop)     (similarly     indicating     that
    "States    with    approved    programs"      "under    the    Clean    Water   Act"
    are "administer[ing]" that Act).
    Nonetheless, in North & South Rivers Watershed Ass'n v.
    Town of Scituate, 
    949 F.2d 552
     (1st Cir. 1991), we held, based on
    the   arguments     presented        there,     that   an     enforcement   action
    undertaken by the MassDEP under the Massachusetts Clean Waters
    Act, 
    Mass. Gen. Laws ch. 21, §§ 26-53
     ("the Massachusetts CWA"),
    amounted to "action [under a state law] comparable to section
    - 14 -
    309(g)" of the Federal CWA, Scituate, 949 F.2d at 554, 556, and
    thus we found the "comparable" law requirement of the Federal CWA's
    preclusion bar satisfied in that case by the MassDEP's action to
    enforce the Massachusetts CWA.5
    Here, the District Court did not expressly identify the
    Massachusetts law "under" which the MassDEP had commenced and
    prosecuted the administrative proceedings that it held triggered
    the Federal CWA's preclusion bar. See Blackstone, 
    2018 WL 4696749
    ,
    at *1-2.       The District Court, however, did invoke our decision in
    Scituate in holding that those proceedings by the MassDEP were
    brought "under a State law comparable to" section 309(g) the
    Federal CWA, Blackstone, 
    2018 WL 4696749
    , at *1 (quoting 
    33 U.S.C. § 1319
    (g)(6)(A)(ii)), which arguably indicated that the District
    Court understood the Massachusetts CWA to have been the law "under"
    which the MassDEP had been operating -- at least in part -- when
    bringing the preclusive prior state enforcement action here.
    Due in part to the ambiguity on that score, however,
    Blackstone moved for clarification following the District Court's
    initial ruling.       In that motion, Blackstone sought to determine
    more       definitively   the   law   "under"   which   the   District   Court
    understood the MassDEP enforcement action to have been brought for
    Scituate cautioned, however, that certain arguments "not
    5
    raised by the parties" were not considered in the course of
    adjudicating that appeal. 949 F.2d at 556 n.8.
    - 15 -
    purposes of the Federal CWA's preclusion bar.           The District Court
    granted the motion to clarify and explained, while again invoking
    Scituate,   that   the     proposition   that   the   Federal   "CWA    has   a
    comparable state law in the Massachusetts Clean Waters Act is well
    established in this District."       Blackstone, 
    2018 WL 5795832
    , at *1
    (first citing 
    Mass. Gen. Laws ch. 21, § 44
    ; then citing Scituate,
    949 F.2d at 555-56).
    We thus proceed on the understanding that the District
    Court    based   its    summary   judgment   decision   in   favor     of   the
    defendants as to the applicability of the preclusion bar on the
    following rationale:       that the MassDEP was proceeding "under," at
    least in part, the Massachusetts CWA; and that the Massachusetts
    CWA is itself "comparable" to section 309(g) of the Federal CWA
    for purposes of the preclusion bar based on the reasoning we set
    forth in Scituate.       It is on this basis, then, that we understand
    the District Court to have held, as a matter of law, that the
    "comparable" law requirement of the Federal CWA's preclusion bar
    had been satisfied.
    Blackstone does not dispute that the Massachusetts CWA
    qualifies as a "comparable" law for purposes of the Federal CWA's
    preclusion bar, as it does not dispute Scituate's holding on that
    point.   But, Blackstone contends, the MassDEP's enforcement action
    was not commenced and prosecuted "under" the Massachusetts CWA,
    even in part.          Instead, Blackstone contends, that enforcement
    - 16 -
    action   was   brought   only    "under"     the   Massachusetts   Wetlands
    Protection Act, 
    Mass. Gen. Laws ch. 131, § 40
     ("the MWPA").              That
    is clear, Blackstone contends, from a review of the relevant
    enforcement documents -- the UAO, the ACOP, and the Final Decision
    -- as Blackstone notes their repeated invocation of the MWPA.
    Moreover, Blackstone asserts that the MWPA does not itself qualify
    as a "comparable" law, even under the reasoning relied on in
    Scituate. For that reason, Blackstone contends, the District Court
    erred in finding the "comparable" law requirement satisfied as a
    matter of law and thus its grant of summary judgment to the
    defendants based on the preclusion bar must be overturned.
    According to the defendants, we need not decide whether
    Blackstone is right that the MassDEP's enforcement action was not
    in   fact   commenced    and    prosecuted    even   in   part   under   the
    Massachusetts CWA and that it was instead commenced and prosecuted
    solely under the MWPA.     The defendants point out that there is no
    dispute that the MassDEP's action was commenced and prosecuted at
    least in part under the MWPA.         Thus, they contend that we need
    only address whether the MWPA is itself a "comparable" law under
    the standard set forth in Scituate and they assert that it is.
    The District Court, as we have explained, did not address
    whether the MWPA is a "comparable" law in granting summary judgment
    based on the preclusion bar to the defendants.            But, the question
    is one of law, and we may affirm the District Court's summary
    - 17 -
    judgment   ruling   on   any   ground    manifest   in   the   record.    See
    Saccoccia v. United States, 
    955 F.3d 171
    , 172 (1st Cir. 2020).
    Nevertheless, we cannot affirm the District Court's
    ruling on this ground.         Scituate held that a state law measure
    that "closely parallels" the administrative penalties subsection
    of the Federal CWA, 309(g), could qualify as a "comparable" law,
    949 F.2d at 554, 556, and that the Massachusetts CWA met that
    "closely   parallels"     standard       because    it   "contains   penalty
    assessment provisions comparable to the Federal Act, . . . the
    State is authorized to assess those penalties, and . . . the
    overall scheme of the two acts is aimed at correcting the same
    violations, thereby achieving the same goals," id. at 556.               But,
    Scituate did not address whether the MWPA similarly could meet the
    "closely parallels" standard.           And, even assuming, as we did in
    Scituate, that a state law need not have been "certified by the
    EPA under section 402 of the Federal Clean Water Act," id. at 556
    n.8,6 to qualify as "comparable," the defendants' contention that
    the MWPA qualifies as "comparable" under Scituate is without merit.
    6 Although in Scituate the EPA had raised the argument that
    the state law had to be certified in order to be "comparable" as
    an amicus, the parties themselves had not done so, and thus
    Scituate did not consider it. 949 F.2d at 556 n.8. Similarly
    here, neither party contends that the statutory preclusion bar in
    section 309(g)(6)(A)(ii) of the Federal CWA is applicable only
    when the state law in question has been certified under section
    402(b), 
    33 U.S.C. § 1342
    (b).
    - 18 -
    The primary prohibition in the Federal CWA provides that
    "[e]xcept as in compliance with [the Federal CWA], the discharge
    of any pollutant" into "the waters of the United States" "by any
    person shall be unlawful."       
    33 U.S.C. §§ 1311
    (a), 1362(7), (12);
    see also 
    33 U.S.C. § 1342
    (k) ("Compliance with a permit issued
    pursuant to this section shall be deemed compliance . . . with
    section[] 1311 . . . .").         The   Massachusetts    CWA   similarly
    prohibits the "discharge of any pollutant into waters of the
    commonwealth, except in conformity with a permit," 
    Mass. Gen. Laws ch. 21, § 42
    ; see Entergy Nuclear Generation Co. v. Dep't of Env't
    Prot., 
    944 N.E.2d 1027
    , 1033 (Mass. 2011) ("Like the Federal Act,
    the [Massachusetts CWA] creates a comprehensive permitting program
    to ensure water quality standards are met."), and administrative
    penalties may likewise be assessed against those who violate that
    prohibition, see Scituate, 949 F.2d at 556 (citing Mass. Gen. Laws
    ch. 21A, § 16).
    But,    the   MWPA's   prohibitions   are   both   broader   and
    narrower than the Federal CWA's.          Rather than prohibiting the
    unauthorized discharge of pollutants into water, they regulate
    instead "project[s that] involve[] work in a wetlands area."           Ten
    Loc. Citizen Grp. v. New Eng. Wind, LLC, 
    928 N.E.2d 939
    , 941 (Mass.
    2010); see 
    Mass. Gen. Laws ch. 131, § 40
     (providing that "[n]o
    person shall remove, fill, dredge, or alter" enumerated wetlands
    unless such person files a "notice of intention" to do so with
    - 19 -
    state and local regulators and, if necessary, "receiv[es] and
    compl[ies] with an order of conditions").7          And, to the limited
    extent that the MWPA's implementing regulations do purport to
    direct   that     activity   "shall   not   impair . . .     surface   water
    quality," e.g., 310 C.M.R. §§ 10.54(4), 10.56(4), they apply only
    if the activity in question will "remove, fill, dredge or alter"
    MWPA-protected lands, id. §§ 10.02(2)(a), 10.51, and only if those
    lands    are    also   deemed   significant   to   certain    statutorily-
    enumerated interests, see 
    Mass. Gen. Laws ch. 131, § 40
    ; 310 C.M.R.
    § 10.05(6).
    Thus, even assuming that the "overall scheme" of the
    Massachusetts CWA is "aimed at correcting the same violations" as
    the Federal CWA, Scituate, 949 F.2d at 556, given how "closely"
    the former "parallels" the latter, id. at 554, the same cannot be
    said of the MWPA.      Accordingly, we agree with Blackstone that the
    MWPA, "[a]s its name would suggest . . ., is designed to protect
    wetlands.      It has neither the purpose nor the effect of protecting
    the nation's waters more broadly."
    7 See also, e.g., Miramar Park Ass'n v. Town of Dennis, 
    105 N.E.3d 241
    , 250 (Mass. 2018) ("The [MWPA] requires that projects
    that affect wetlands . . . and that affect interests identified in
    the act, may take place only after receipt of a permit from an
    appropriate issuing body . . . .").
    - 20 -
    2.
    That brings us, then, to the question of whether a
    "reasonable    juror       [necessarily       would]   have   found   in    the
    defendant[s'] favor," Primarque Prods. Co. v. Williams W. & Witts
    Prods. Co., 
    988 F.3d 26
    , 36 (1st Cir. 2021), that the MassDEP's
    enforcement action was "commenced and . . . prosecut[ed]" -- at
    least in part -- "under" the Massachusetts CWA, as we understand
    the District Court to have ruled, see Blackstone, 
    2018 WL 5795832
    ,
    at *1.   For, if that action on any reasonable view of the record
    was prosecuted in part under the Massachusetts CWA, then even
    Blackstone    agrees   that     the    "comparable"     law   requirement    is
    satisfied as matter of law, because, as we have noted above,
    Blackstone does not dispute that the Massachusetts CWA is itself
    a "comparable" law for purposes of the Federal CWA's preclusion
    bar.
    Blackstone acknowledges that the enforcement documents
    -- the UAO, the ACOP, and the Final Decision -- do not exclusively
    reference    the   MWPA.      All     three    documents   also   require   the
    respondent -- Arboretum Village -- to "take every reasonable step
    to prevent further violations of the Wetlands Protection Act and
    - 21 -
    the Massachusetts Surface Water Quality Standards."8              (emphases
    added).
    Notably, those water quality standards are promulgated
    pursuant to authority granted the MassDEP by the Massachusetts
    CWA.       See 
    Mass. Gen. Laws ch. 21, § 27
    (5); 314 C.M.R. § 4.00.
    Moreover, the UAO expressly invokes the MassDEP's authority "to
    issue orders to any person in violation of any law or regulation
    [that the] MassDEP is authorized to enforce," (emphasis added),
    and the ACOP -- which states that the parties entered into it "in
    order      to   finally   resolve    the . . .   adjudicatory   proceeding"
    commenced by the issuance of the UAO -- imposes obligations on the
    defendants to take action to prevent sediment-laden stormwater
    discharges going forward.           The ACOP at no point states that those
    obligations are being imposed solely to ensure compliance with the
    MWPA and not also to ensure compliance with the Massachusetts
    Surface Water Quality Standards, which, as we have observed, are
    promulgated pursuant to the Massachusetts CWA.9
    Blackstone nevertheless contends that the enforcement
    documents do not actually set forth a "charge of any violation of
    Blackstone does not argue that the fact that only Arboretum
    8
    Village was named as a respondent in these documents is
    significant.
    Blackstone makes no argument to the effect that the UAO and
    9
    the ACOP are part of different "actions" that may have been
    commenced and prosecuted under separate laws.
    - 22 -
    the [Massachusetts] CWA or any regulation promulgated thereunder,"
    because the documents imposed only a "prospective requirement"
    that the defendants "prospectively comply with the Massachusetts
    Surface Water Quality Standards."            It therefore asserts that the
    MassDEP's action was not brought "under" a "comparable" law within
    the meaning of section 309(g)(6)(A)(ii).
    But, given the features of the enforcement documents
    that we have just described that implicate the Massachusetts CWA
    and not only the MWPA, the documents do not indicate that the
    MassDEP imposed merely a bare requirement to comply in the future
    with the Massachusetts CWA, through the Massachusetts Surface
    Water Quality Standards that were promulgated pursuant to it, such
    that the Massachusetts CWA did not itself form a basis for the
    underlying enforcement action.           Cf. Cal. Sportfishing Prot. All.
    v. Chico Scrap Metal, Inc., 
    728 F.3d 868
    , 876 (9th Cir. 2013)
    (reasoning    that   an   imposed   "condition    [that]   merely   requires
    Defendants to abide by legal obligations [concerning stormwater
    discharges]    other      than   those    that   the   parties   [actually]
    litigated . . .      does not transform . . . actions into ones to
    require compliance with the Clean Water Act"). Nor does Blackstone
    develop any argument that we may look beyond the face of the
    enforcement documents themselves to determine what law the MassDEP
    was acting "under" in its prior enforcement action.              See United
    States v. Zannino, 
    895 F.2d 1
    , 17 (1st Cir. 1990).               And we are
    - 23 -
    reluctant to treat Blackstone as having developed any such argument
    for us to countenance such a searching inquiry into the MassDEP's
    motivations in bringing its prior enforcement action, given the
    complexities that a deep dive into agency motivation of that sort
    would entail and given that Blackstone does not attempt to address
    any   of   those    complexities.     Accordingly,        based   on   what     the
    enforcement documents themselves reveal and the nature of the
    arguments Blackstone makes to us,             we decline to disturb the
    District     Court's      determination      that   the     MassDEP's         prior
    enforcement action was commenced and prosecuted in part "under" a
    "comparable" law -- the Massachusetts CWA -- for purposes of the
    preclusion provision at section 309(g)(A)(6)(ii).10
    B.
    We     next   address   Blackstone's     contention        that    the
    District Court erred in awarding summary judgment to the defendants
    on Blackstone's       sediment-laden stormwater discharges             claim in
    Count II of its complaint on the ground that the claim does not
    allege the same violation as the MassDEP's enforcement action
    targeted.     See 
    33 U.S.C. § 1319
    (g)(A)(6)(ii) (barring "a civil
    penalty action" concerning "any violation . . . with respect to
    which a State has commenced and is diligently prosecuting an
    We stress again that we are not deciding the merits of any
    10
    argument regarding the "comparable" law requirement not raised by
    the parties in this proceeding.    See Scituate, 949 F.2d at 556
    n.8.
    - 24 -
    action" (emphasis added)); Francisco Sánchez v. Esso Standard Oil
    Co., 
    572 F.3d 1
    , 10 (1st Cir. 2009) (reading similar preclusion
    provision to "impl[y] that the government action does not preclude
    a citizen suit against other violations" (quoting Jeffrey G.
    Miller, Theme and Variations in Statutory Preclusions Against
    Successive Environmental Enforcement Actions by EPA and Citizens:
    Part One:   Statutory Bars in Citizen Suit Provisions, 28 Harv.
    Env't L. Rev. 401, 473-74 (2004))); see also H.R. Rep. No. 99-
    1004, at 133 (1986) (Conf. Rep.) ("This limitation applies only to
    an action for civil penalties for the same violations which are
    the subject of the administrative civil penalties proceeding."
    (emphasis added) (discussing Senate bill)); 
    id. at 136
     ("[W]here
    an administrative penalty is being pursued, a citizen suit may not
    be filed for the same violation." (emphasis added) (discussing
    House amendment)).   Blackstone does not suggest in pressing this
    contention that the MassDEP's focus was solely on the MWPA and
    thus not on a violation of the Massachusetts CWA.      Rather, we
    understand Blackstone to be contending only that, even if the
    MassDEP's enforcement action was brought under the Massachusetts
    CWA, that action did not concern the same violation as the one
    that Blackstone is alleging in the claim set forth in Count II of
    its complaint because Blackstone's claim "targets the causes" of
    the defendants' water pollution (such as "the defective design of
    Defendants' stormwater management and erosion and sediment control
    - 25 -
    systems"), and the MassDEP's enforcement action targeted only the
    defendants' "pollution, per se (their silt-laden discharges)."11
    But,    as   the   defendants    point      out,      the    MassDEP's
    enforcement action, no less than Blackstone's claim in Count II of
    its citizen suit, also targeted the causes of the sediment-laden
    stormwater    discharges.        Indeed,      the    descriptions       of   the
    "violations" "observed" at the construction site in both the UAO
    and the ACOP made note of not only "[d]ischarge(s) of silt-laden
    runoff" but also the presence of "unstable, eroded suspended soils
    at the Site."    And, as the ACOP explained, the MassDEP as a result
    of    these      observed        violations         "directed         [Arboretum
    Village] . . . to      prepare      a   comprehensive           erosion      and
    sedimentation plan [and] a slope stabilization plan."12                Moreover,
    the resulting "Erosion Control Plan" -- which the ACOP required
    Arboretum Village to "implement" -- called for, as descriptions of
    it in the record make clear, "slope stabilization" (regrading) at
    one area of the site; planting a "hydroseeded area" to reduce
    stormwater runoff; and erecting "haybales, berms, swales, [and]
    11 We need not address the defendants' contention that
    Blackstone waived this argument by asserting it only in opposition
    to the defendants' motion to dismiss, because the argument does
    not succeed on the merits in any event. See Primarque, 988 F.3d
    at 39 n.11 (1st Cir. 2021) (citing United States v. Leavitt, 
    925 F.2d 516
    , 517 (1st Cir. 1991)).
    12The ACOP also mandated that Arboretum Village take "every
    reasonable step to prevent further violations." (emphasis added).
    - 26 -
    temporary       ponds"   including     "two   sediment       basins."      And,
    correspondence between Robert Gallo and the MassDEP confirms that
    the basic premise of the Erosion Control Plan was to "provide[]
    for a myriad of BMPs"13 to "allow[] for stormwater control during
    construction while the site was being built out until the site
    ha[d] been permanently stabilized."
    Blackstone        separately   argues     that    the    stormwater
    discharge violations that it alleges in the claim set forth in
    Count II of its complaint are not the "same violations" that the
    MassDEP targeted "because they occurred later in time."                     Here
    again, in advancing this argument Blackstone does not appear to be
    disputing that the MassDEP's action was brought under a comparable
    law and thus does not appear to be disputing that it was brought
    under the Massachusetts CWA.         Instead, it appears to be contending
    only    that,    even    on   that   understanding,    the    same    violation
    requirement of the statutory preclusion bar is not satisfied based
    on the timing of the targeted violations.
    Blackstone points out in this regard that the MassDEP in
    its prior enforcement action "alleged violations occurring on
    three days in June 2013," while the count in the complaint setting
    forth the       sediment-laden stormwater discharges claim              "alleged
    BMPs, or "Best Management Practices," are methods used to
    13
    control or prevent stormwater runoff and the discharge of
    pollutants, such as sediments, into waterbodies.
    - 27 -
    violations           occurring        thereafter            and       persisting
    through . . . 2016."           But,   the    MassDEP's      enforcement   action
    culminated in a consent agreement -- the ACOP -- that contained
    forward-looking provisions, such as               those imposing      stipulated
    administrative penalties14 and commanding that Arboretum Village
    implement    the     Erosion     Control    Plan,    that    were   designed     to
    ameliorate future issues at the site no less than its imposition
    of an $8,000 civil administrative penalty was meant to penalize
    the violations observed in June of 2013.
    That is significant because in Scituate the MassDEP had
    "alleged that Scituate owned and operated a sewage treatment
    facility    that    was   [unlawfully]      discharging     pollutants    into    a
    coastal estuary," and, in 1987, the MassDEP "ordered Scituate
    to . . . take all steps necessary to plan, develop and construct
    new wastewater treatment facilities [and to] . . . begin extensive
    upgrading of the facility subject to the [Mass]DEP's review and
    approval    at     interim   stages   of    the     planning,     designing,   and
    construction phases."        949 F.2d at 553-54.15       We then reasoned that
    14 The ACOP provided for "stipulated civil administrative
    penalties to the Commonwealth in the amount of $100.00 per day"
    "if [Arboretum Village] violates any provision of the Consent
    Order," and further reflected that Arboretum Village had agreed to
    be subject to "additional high level enforcement action from [the]
    MassDEP" if "[a]ny further discharges of turbid stormwater runoff
    to wetland resource areas in excess of 150 NTUs" occurred.
    15The MassDEP in 1987 "elected not to assess penalties against
    Scituate at the time of issuing its [o]rder, but did reserve the
    right to do so at a later date." Scituate, 949 F.2d at 554.
    - 28 -
    a citizen suit alleging factually similar but chronologically
    later discharge violations was "duplicative" of the MassDEP's 1987
    order because it sought a remedy for a violation that "[wa]s
    already in the process of being remedied by the [1987] State
    Administrative Order" and that allowing a citizen suit to proceed
    "at a time when remedial measures are all well underway do[es] not
    further   [the   Federal   CWA's]    goal[s]"   but   instead   erects   an
    "impediment[] to environmental remedy efforts."           Id. at 553-58;
    see also Friends of Milwaukee's Rivers v. Milwaukee Metro. Sewerage
    Dist., 
    382 F.3d 743
    , 762-63 (7th Cir. 2004) ("Levying additional
    penalties   on   violators   who    are   undertaking   massive    remedial
    projects will not bring about compliance any faster or cause the
    result to be any more effective -- it will just cause the result
    to be more expensively arrived at.").
    Blackstone does attempt to distinguish Scituate in its
    reply brief by contending that the MassDEP's order in that case
    was "too complex to be complied with immediately," whereas here,
    Blackstone contends, "compliance is not complicated."             But, this
    contention would appear to be at odds with the only contention
    that Blackstone raised in its opening brief -- that the differences
    in the timing of the occurrence of the violations targeted in,
    respectively, the MassDEP's enforcement action and Blackstone's
    own citizen suit under the Federal CWA in and of themselves
    prevented the same violation requirement from being met.                 No
    - 29 -
    suggestion    was   made   in    Blackstone's      opening    brief   that    such
    differential    timing     did    not   in   and   of    itself   prevent     that
    requirement from being satisfied in cases where the state action
    resulted in a remedy that crosses some unspecified threshold of
    complexity not present here.         See Villoldo v. Castro Ruz, 
    821 F.3d 196
    , 206 n.5 (1st Cir. 2016) ("[N]ew arguments may not be raised
    for the first time in a reply brief." (citing Rivera–Muriente v.
    Agosto–Alicea, 
    959 F.2d 349
    , 354 (1st Cir. 1992))). Thus, at least
    on this record, we agree with the defendants that the District
    Court did not err in finding the same violation requirement
    satisfied as a matter of law.
    C.
    We now take up Blackstone's contention that the District
    Court erred in granting summary judgment to the defendants on the
    claim set forth in Count II of Blackstone's complaint based on the
    Federal CWA's preclusion bar, because the record does not show, as
    a matter of law, that the MassDEP was "diligently prosecuting" its
    action   under       the         Massachusetts       CWA.          
    33 U.S.C. § 1319
    (g)(6)(A)(ii).       We disagree.
    The "'great volume of enforcement actions are intended
    to be brought by the State,' [and] citizen suits are proper only
    'if the Federal, State, and local agencies fail to exercise their
    enforcement    responsibility.'"             Scituate,      949   F.2d   at   557
    (alteration omitted) (quoting Gwaltney of Smithfield, Ltd. v.
    - 30 -
    Chesapeake Bay Found., Inc., 
    484 U.S. 49
    , 60 (1987)).                       For that
    reason,     "[c]itizen-plaintiffs          must    meet   a    high    standard    to
    demonstrate          that         [an      agency]        has         failed       to
    prosecute . . . diligently."             Karr v. Hefner, 
    475 F.3d 1192
    , 1198
    (10th Cir. 2007); see also Piney Run Pres. Ass'n v. Cnty. Comm'rs,
    
    523 F.3d 453
    , 459 (4th Cir. 2008) (similar); Scituate, 949 F.2d at
    557 ("Where an agency has specifically addressed the concerns of
    an analogous citizen's suit, deference to the agency's plan of
    attack should be particularly favored.").
    The District Court determined that "[t]he circumstances
    of   this     case     demonstrate         ongoing     diligent       prosecution."
    Blackstone, 
    2018 WL 4696749
    , at *2.                 It observed that the "ACOP
    imposed . . . a series of enforceable obligations on Defendants
    designed    to   bring      the   Site    into    compliance    and    to   maintain
    compliance and promulgated standards to measure compliance," 
    id.,
    while at the same time "reserv[ing] to the MassDEP a full set of
    enforcement vehicles for any instances of future non-compliance,"
    id.; see also Scituate, 949 F.2d at 557; Grp. Against Smog &
    Pollution, Inc. v. Shenango Inc., 
    810 F.3d 116
    , 128 (3rd Cir. 2016)
    ("Courts have concluded, in cases similar to ours, that consent
    decrees     already   entered      into    by     administrative      agencies    and
    - 31 -
    polluting    entities       were    capable    of    constituting    diligent
    prosecutions." (collecting cases)).16
    Moreover, the District Court determined that, after the
    ACOP was approved in December 2014, it was indisputable that the
    MassDEP "monitored the Site and . . . collected data and analysis
    from the Defendants, from Defendants' outside engineers and from
    municipal sources on an ongoing basis."                Blackstone, 
    2018 WL 4696749
    , at *2.       The District Court thus found, as a matter of
    law, that "the cumulative actions of the MassDEP form[] the basis
    of a substantial, considered and ongoing response to" the issues
    that Blackstone is now attempting to pursue via its stormwater
    discharges claim.     
    Id.
    In line with the District Court's assessment, the record
    indisputably shows that between December 22, 2014, when the ACOP
    was finally approved, and May 6, 2016, when Blackstone's suit was
    filed, the MassDEP (1) conducted numerous site visits to sample
    turbidity    levels   and    to    evaluate    the   defendants'    stormwater
    management   practices;      (2)   collected    turbidity   data    and   other
    information about the state of stormwater control measures at the
    site from the defendants on an ongoing basis; (3) sent multiple
    16 The defendants separately contend that the mere existence
    of the UAO and the ACOP necessarily establish diligent prosecution.
    The defendants cite no case law to support that expansive
    proposition, which runs counter to Scituate. See 949 F.2d at 557
    ("The bar against citizen's suits also requires that the State
    diligently enforce its [o]rder[s].").
    - 32 -
    letters   to    the   defendants       and   their    environmental        consultant
    detailing "concerns" with the site, such as "issues with stormwater
    management" that the MassDEP said "must be corrected," and advising
    the defendants to implement a revised Erosion Control Plan as well
    as to "revisit the ACOP . . . [to] insure that the site is in
    compliance     with    the    requirements      therein";     (4)    met    with    the
    defendants on multiple occasions to discuss stormwater control
    issues at the site and the need for an updated Erosion Control
    Plan;   and    (5)    deliberated      internally     about    the   best     way    to
    remediate      ongoing       issues    with     the    site,     which      included
    "investigat[ing] . . . whether or not to exercise [the MassDEP's]
    discretion" to bring a "high-level enforcement action."                     Further,
    as the District Court detailed, see Blackstone, 
    2018 WL 4696749
    ,
    at *2, the MassDEP during this period left "open the possibility
    of imposing penalties upon" the defendants, Scituate, 949 F.2d at
    557.
    We agree with the defendants that the MassDEP's actions
    preceding      Blackstone's     suit    "ampl[y] . . .        demonstrate[]        [the
    agency's] ongoing involvement vis-à-vis" the construction site.
    Paolino, 830 F.3d at 16; see also Scituate, 949 F.2d at 557.                         We
    note, moreover, that there is no trace of the "dilatory, collusive
    or otherwise . . . bad faith" behavior by the agency of the sort
    that has concerned other courts.              E.g., Pitroff v. United States,
    No. 16-cv-522-PB, 
    2017 WL 3614436
    , at *5 (D.N.H. Aug. 22, 2017)
    - 33 -
    (quoting Conn. Fund for the Env't v. Cont. Plating Co., 
    631 F. Supp. 1291
    , 1293 (D. Conn. 1986)).
    Blackstone nevertheless contends that the District Court
    erred in finding that the MassDEP's activity just described was
    diligent as a matter of law because the record supportably shows
    that a "staff shortage" had forced the agency to make fewer visits
    to the site during the year after the ACOP was executed than it
    otherwise might have done and because the record supportably shows
    that the agency "delegated" some of its monitoring activity to a
    consultant hired by the defendants. In pressing these contentions,
    we do not understand Blackstone to be disputing that the MassDEP's
    enforcement activity with respect to the site was undertaken in
    part pursuant to the Massachusetts CWA.     So understood, these
    arguments provide no ground for disturbing the District Court's
    summary judgment ruling with respect to the requirement that the
    MassDEP be "diligently prosecuting."
    The record establishes -- as Blackstone acknowledges --
    that, once third-party complaints were received in late 2015 or
    early 2016 concerning possible stormwater control issues at the
    site, the MassDEP   did dispatch its own analysts on numerous
    occasions to investigate potential ACOP violations.      That the
    MassDEP -- from the time the ACOP was executed through the moment
    that Blackstone's suit was filed -- also requested and received
    data about stormwater discharges from the defendants' consultant
    - 34 -
    on a periodic basis does not suggest that the MassDEP's enforcement
    activities themselves were not diligent.                  See Scituate, 949 F.2d
    at 557 (finding diligent prosecution in part because the defendant
    was submitting "test results" about "discharges" in compliance
    with a MassDEP directive).
    To be sure, Blackstone contends that the defendants'
    consultant was often sampling for turbidity "well after a storm
    ha[d] ended," as part of a practice calculated to achieve seemingly
    compliant turbidity levels in reports generated and sent to the
    MassDEP.   But, the evidence in the record showing as much provides
    no support for the contention that the MassDEP's own efforts were
    not diligent.
    Blackstone     also    contends       that    the    MassDEP      was   not
    diligent in its enforcement activity because, during a period of
    "increased [MassDEP] involvement" at the construction site from
    January    2016    to    May    2016,    the     agency    was    "assuring     the[]
    [defendants]      that   they    were    complying       with    the   ACOP   despite
    overwhelming evidence to the contrary."               Blackstone's argument on
    this front focuses on a telephone conversation between a MassDEP
    official and Robert Gallo that took place on March 9, 2016.
    The record reveals, however, that no such assurances
    were given during that conversation.               In fact, an email from the
    relevant MassDEP official on the date in question reflects that
    when Robert "Gallo called . . . want[ing] me to write an email
    - 35 -
    saying he was in compliance," "I told him I couldn't do that."
    Robert Gallo testified to the same effect in his deposition,
    acknowledging that the MassDEP official told him "I can't send you
    that email."    And, the email that the MassDEP official ultimately
    did send to Robert Gallo expressly avoids "venturing an opinion
    about conditions in the field."17
    Blackstone   more    generally   asserts   that   the   MassDEP
    "ignored overwhelming evidence of . . . ACOP violations" presented
    by third parties and the agency's own analysts in early 2016.           But,
    insofar as Blackstone here accepts that diligent enforcement of
    the   ACOP   would   constitute    diligent   enforcement   activity    with
    potentially preclusive effect, the problem with this contention is
    that, as the District Court explained, "[t]he State is entitled to
    make its own informed decisions about the best possible remedial
    measures"; merely "because the State may not be taking the precise
    action the plaintiff wants it to or moving with the alacrity the
    plaintiff desires does not entitle the plaintiff to relief."
    Blackstone, 
    2018 WL 4696749
    , at *1 (alterations omitted) (quoting
    Scituate, 949 F.2d at 558).
    17Blackstone also makes much of the fact that, around March
    23, the same MassDEP official removed a reference to "violations"
    from a letter later sent to the defendants. But, the result, once
    again, was a letter that simply avoided taking a position on
    whether there were ACOP violations (but which did reference
    "challenges in dealing with stormwater and erosion control"); not
    a document that "assured" the defendants that there were no such
    violations.
    - 36 -
    Blackstone also argues that the MassDEP's enforcement
    activity was not diligent in light of the deposition testimony of
    the MassDEP's Wetlands Section Chief that during Spring 2016 she
    was "not highly focused on whether the [defendants] ever had a
    [turbidity] reading of over" 150 NTUs but was instead focused more
    on whether "there's an impact to the wetland resource areas."
    Blackstone contends that this testimony amounts to a deficient
    attempt to "justify [the MassDEP's] failure to take enforcement
    action" during that period, notwithstanding that the agency had
    "tools for prosecuting pollution of streams of rivers" even without
    an impact "on wetlands," including, Blackstone contends, in the
    ACOP.
    Blackstone is correct that the ACOP stated -- as one
    condition among many -- that "[a]ny further discharges of turbid
    stormwater runoff to wetland resource areas in excess of 150 NTUs
    will be grounds for stipulated penalties and/or additional high
    level enforcement action from [the] MassDEP."   But, it was within
    the realm of the MassDEP's discretion to decide whether to pursue
    possible violations of that provision alone as opposed to reserving
    such action for instances in which there were not only readings
    over 150 NTUs but also observed impacts on nearby wetlands.    See
    Karr, 
    475 F.3d at 1197
     ("[A]n agency's prosecutorial strategy [need
    not] coincide with that of the citizen-plaintiff."); Ellis v.
    Gallatin Steel Co., 
    390 F.3d 461
    , 477 (6th Cir. 2004) (similar);
    - 37 -
    cf. United States v. Metro. Water Reclamation Dist., 
    792 F.3d 821
    ,
    825 (7th Cir. 2015) ("Even the most diligent litigator may conclude
    that settlement is the best option -- if only because it frees up
    enforcement resources for use elsewhere           -- and to achieve a
    settlement a litigant must accept something less than the most
    favorable outcome.").
    Finally, we reject Blackstone's suggestion that it was
    hampered in its effort to build its case that the MassDEP was not
    engaged in diligent enforcement activity because the District
    Court erroneously refused to allow it to conduct plenary "discovery
    regarding the Defendants' conduct at the Site."       As the defendants
    note, the record itself contains the fruits of "extensive discovery
    regarding . . . what was happening at the Site," and Blackstone
    does not state with any particularity what additional information
    concerning the site it was unable to seek because of the District
    Court's discovery rulings, let alone explain how those rulings
    thereby    resulted     in   a        "manifest      injustice,   that
    is, . . . substantial prejudice."      Mack v. Great Atl. & Pac. Tea
    Co., 
    871 F.2d 179
    , 186-87 (1st Cir. 1989); see Martinez ex rel.
    Martinez v. Garcia, 
    187 F.3d 622
    , 
    1998 WL 1085816
    , at *1 (1st Cir.
    1998) (unpublished) (citing Zannino, 
    895 F.2d at 17
    ).
    D.
    Blackstone's last argument in support of its contention
    that the District Court erred in granting summary judgment to the
    - 38 -
    defendants as to Count II of the complaint is that the statutory
    preclusion provision in the Federal CWA cannot apply to the extent
    that Blackstone seeks declaratory and injunctive relief on its
    stormwater discharges claim.           That is so, Blackstone contends,
    because the provision's plain language restricts requests for
    "civil    penalt[ies]"    but    not    requests   for       declaratory   and
    injunctive relief.     Compare 
    33 U.S.C. § 1319
    (g)(6)(A)(ii) ("[A]ny
    violation . . . with respect to which a State has commenced and is
    diligently prosecuting an action under a State law comparable to
    this subsection . . . shall not be the subject of a civil penalty
    action" by the federal government under section 309(d) or by a
    citizen-plaintiff    (emphasis    added)),    with     
    id.
        § 1365(a),   (b)
    ("[A]ny citizen may commence a civil action on his own behalf"
    except "[n]o action may be commenced . . . if the Administrator or
    State has commenced and is diligently prosecuting a civil or
    criminal action in a court of the United States . . . to require
    compliance   with   the   standard,      limitation,     or    order . . . ."
    (emphasis added)).18
    Blackstone and amici also maintain that the legislative
    history supports this understanding.        See S. Rep. No. 99-50, at 28
    18  See also 
    33 U.S.C. § 1319
    (b) (authorizing the EPA "to
    commence a civil action for appropriate relief, including a
    permanent or temporary injunction . . . in the district court[s]
    of   the   United  States"  (emphases   added));  
    id.
      § 1319(g)
    (authorizing the EPA to administratively "assess a . . . civil
    penalty" of up to $125,000 (emphasis added)).
    - 39 -
    (1985) ("The potential for overlap between citizen enforcement
    suits     and       administrative      civil         penalties     is     specifically
    addressed. . . .           [But,] this limitation would not apply to[] an
    action    seeking       relief     other     than     civil     penalties    (e.g.,    an
    injunction      or     declaratory      judgment) . . . .            The    Agency    can
    prevent    duplicate         proceedings       by    intervening     in    the    ongoing
    citizen enforcement suit or by bringing its own judicial action
    before a citizen suit is filed."); H.R. Rep. No. 99-1004, at 133
    (1986) (Conf. Rep.) (similar).               Further, they point out, the Tenth
    Circuit has read section 309(g)(6)(A)(ii) in the manner they
    advocate.       See Paper, Allied-Indus., Chem. & Energy Workers Int'l
    Union v. Cont'l Carbon Co., 
    428 F.3d 1285
    , 1300 (10th Cir. 2005)
    ("The governing principle behind [section 309(g)(6)(A)(ii)] is to
    avoid      duplicative            monetary          penalties      for      the      same
    violation . . . [but that provision] does not apply to equitable
    relief."); cf. also Citizens for a Better Env't-Cal. v. Union Oil
    Co. of Cal., 
    83 F.3d 1111
    , 1118 (9th Cir. 1996) ("[T]here [i]s no
    evidence       in    the    legislative      history . . .         suggest[ing]      that
    Congress intended to extend th[is] bar on citizen suits to a
    context beyond administrative penalty actions." (citing Wash. Pub.
    Int. Rsch. Grp. (WashPIRG) v. Pendleton Woolen Mills, 
    11 F.3d 883
    ,
    885-86 (9th Cir. 1993))).           But see Ark. Wildlife Fed'n v. ICI Ams.,
    Inc.,     
    29 F.3d 376
    ,   383   (8th        Cir.   1994)   (reading       section
    309(g)(6)(A)(ii) to bar injunctive relief "in spite of the plain
    - 40 -
    language   of    the    statute"    because   the   alternative       would   be
    "unreasonable").
    But, Blackstone acknowledges, Scituate rejected the very
    argument that it now advances. See 949 F.2d at 557-58 (concluding,
    "[b]ased     on . . .      policy   considerations       regarding     civilian
    actions" and the fact that the text of 
    33 U.S.C. § 1365
    (a) "does
    not authorize [citizens to seek] civil penalties separately from
    injunctive      relief,"     that     the   preclusion     bar   in     section
    309(g)(6)(A)(ii) "extends to civil penalty actions . . . [and to]
    injunctive      and     declaratory     relief"     (quotation       omitted)).
    Blackstone makes no timely argument that Scituate is not law of
    the circuit.     As a panel, we are bound by Scituate on this score.
    See United States v. Lewko, 
    269 F.3d 64
    , 66 (1st Cir. 2001).
    E.
    For the foregoing reasons, we decline to reverse the
    District Court's award of summary judgment to the defendants on
    the applicability of         section 309(g)(6)(A)(ii) to Blackstone's
    sediment-laden stormwater discharges claim.              And, because we so
    conclude, we must also reject Blackstone's contention that the
    District Court erred in denying its cross-motion for summary
    judgment on this same issue.          See Littlefield v. Acadia Ins. Co.,
    
    392 F.3d 1
    , 6 (1st Cir. 2004) ("Cross motions simply require us to
    determine whether either of the parties deserves judgment as a
    - 41 -
    matter of law on facts that are not disputed." (quoting Barnes v.
    Fleet Nat'l Bank, N.A., 
    370 F.3d 164
    , 170 (1st Cir. 2004))).
    III.
    There remains Blackstone's challenge to the District
    Court's summary judgment ruling concerning Count I of Blackstone's
    complaint, concerning the failure of Gallo Builders to obtain
    coverage under a Construction General Permit from the EPA.19   The
    District Court granted the defendants' motion for summary judgment
    on the ground that Blackstone here alleged only a nonactionable
    "technical violation" of the Federal CWA, Blackstone, 410 F. Supp.
    3d at 302-03, particularly given that, the District Court found,
    "[d]uring all relevant times in this case, Robert H. Gallo, his
    wife Janice Gallo and their son Steven Gallo served as the only
    officers, directors and shareholders of [Gallo Builders] . . . [as
    well as] the only members of Arboretum Village," id. at 301.
    The defendants contend that the District Court was right
    to rule in their favor given our decision in Paolino v. JF Realty,
    LLC, 830 F.3d at 16-17, on which the District Court relied, see
    Blackstone, 410 F. Supp. 3d at 302-03. There, a plaintiff bringing
    a citizen suit under the Federal CWA asserted a number of claims
    against the defendant, one of which alleged that the defendant had
    19The defendants do not contend on appeal that the District
    Court erred in applying the statutory preclusion bar only to Count
    II of the complaint.
    - 42 -
    violated      a   condition          in    a     state-issued          National    Pollution
    Discharge Elimination System permit, which required the defendant
    to "notify [the issuing state agency] of a transfer of ownership"
    of the underlying property.                 Paolino, 830 F.3d at 16.
    Paolino     noted          that,    in    that     case,    "the    transferor
    [entity] and the recipient [entity] were controlled by the same
    person, Ferreira" and that Ferreira's identity as the current owner
    of the property in question was known to the state agency charged
    with overseeing compliance with the state-issued NDPES permit.
    Id.    at    16-17.      Paolino          explained      that     it     is   "important   to
    distinguish . . . substantive violations" of permit conditions --
    such    as     "failing        to        maintain      best      management       practices,
    violating . . . water quality standards, and ignoring monitoring
    and    reporting       requirements"             --    from     the     notification-based
    condition that the plaintiff claimed that the defendants were
    violating in that case.                  Id. at 16 (quotation omitted); see id.
    ("These substantive violations are hardly equivalent to a failure
    to     properly       notify        [a     state       agency]     of     a    transfer    of
    ownership . . . ."). The Paolino Court then proceeded on the basis
    of that distinction to find that the alleged permit violation at
    issue concerned only notification regarding property ownership and
    that there was no merit to the plaintiffs' contention that the
    Federal CWA "authorizes citizen suits for the enforcement of all
    - 43 -
    conditions of a permit." Id. (alteration omitted) (emphasis added)
    (quotation omitted).
    But, here, the Federal CWA claim set forth in Count I of
    Blackstone's complaint does not allege simply the violation of a
    permit condition by the permit holder.             The complaint with respect
    to that claim instead alleges that Gallo Builders is an unpermitted
    "operator   of   a    construction       project    that . . .     discharges   a
    pollutant from a point source to waters of the United States" in
    violation of 
    33 U.S.C. §§ 1311
    (a), 1342.                    It thus alleges a
    violation of the statutory requirement to obtain the permit in
    question in the event of such discharges, see 
    id.,
     and not merely,
    like the violation alleged in Paolino, a violation of a condition
    set forth in a permit that had been obtained but that required
    "notif[ication] of a transfer of ownership," Paolino, 830 F.3d at
    16.   Moreover, precisely because the Federal CWA claim set forth
    in Count I of Blackstone's complaint is alleging a violation of a
    statutory prohibition against discharging pollutants into U.S.
    waters   without     an    authorizing    permit,    that   alleged      violation
    certainly is of a kind with the violations of a permit that Paolino
    itself   described        as   "substantive."      Id.   (giving    as   examples
    "failing to maintain best management practices, violating . . .
    water quality standards, and ignoring monitoring and reporting
    requirements" (quotation omitted)).
    - 44 -
    Thus, Paolino does not support the grant of summary
    judgment to the defendants here.   The defendants identify no other
    authority -- and we are aware of none -- that supports their
    position that a citizen suit under the Federal CWA cannot be
    brought against an entity that is alleged to be an operator of a
    construction site that is discharging pollutants into U.S. waters
    in violation of 
    33 U.S.C. §§ 1311
    (a), 1342, so long as another
    entity ultimately controlled by the same individuals has such
    permit coverage.20   Accordingly, we reverse the District Court's
    ruling on this score.
    IV.
    We affirm the District Court's grant of summary judgment
    to the defendants as well as its denial of Blackstone's cross-
    motion for summary judgment on the applicability of the statutory
    preclusion bar found at section 309(g)(6)(A)(ii) of the Federal
    CWA with respect to Count II of Blackstone's complaint; reverse
    the District Court's grant of summary judgment to the defendants
    on Count I of that complaint; and remand for further proceedings
    consistent with this opinion.
    The parties shall bear their own costs.
    20We note that the defendants have made no contention during
    these proceedings that the lack of Gallo Builders' permit coverage
    was the result of a scrivener's error.
    - 45 -