American Waterways Operators v. Wheeler ( 2020 )


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  •                            UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF COLUMBIA
    _________________________________________
    )
    AMERICAN WATERWAYS                        )
    OPERATORS,                                )
    )
    Plaintiff,                  )
    )
    v.                   )                Case No. 18-cv-02933 (APM)
    )
    ANDREW WHEELER, Administrator of the      )
    United States Environmental Protection    )
    Agency, and UNITED STATES                 )
    ENVIRONMENTAL PROTECTION                  )
    AGENCY,                                   )
    )
    Defendants,                 )
    )
    and                                 )
    )
    WASHINGTON ENVIRONMENTAL                  )
    COUNCIL, PUGET SOUNDKEEPER,               )
    FRIENDS OF THE EARTH, AND                 )
    WASHINGTON STATE DEPARTMENT               )
    OF ECOLOGY,                               )
    )
    Intervenor-Defendants.      )
    _________________________________________ )
    MEMORANDUM OPINION AND ORDER
    I.     INTRODUCTION
    On January 19, 2017, the Environmental Protection Agency (“EPA”), acting pursuant to
    Section 312(f)(3) of the Clean Water Act, authorized the State of Washington to declare the Puget
    Sound a “No Discharge Zone” (“NDZ”). That designation cleared the way for the State of
    Washington to prohibit recreational and commercial vessels from discharging sewage into the
    Puget Sound. As a precondition to a state establishing an NDZ, Section 312(f)(3) requires EPA to
    “determine[] that adequate facilities for the safe and sanitary removal and treatment of sewage
    from all vessels are reasonably available” for the waters at issue. 
    33 U.S.C. § 1322
    (f)(3). EPA
    made such a “reasonable availability” finding for the waters of the Puget Sound.
    American Waterways now seeks to overturn the agency’s decision. Moving for summary
    judgment, it argues that EPA’s “reasonable availability” determination was arbitrary and
    capricious and violated Section 312(f)(3) of the Clean Water Act for multiple reasons. EPA does
    not seek to defend its determination. Instead, EPA now confesses legal error on one challenged
    ground, conceding that it erred by authorizing the Puget Sound NDZ without considering the
    financial costs of the action. Instead of opposing summary judgment, EPA asks the court to
    reconsider its earlier denial of the agency’s motion for voluntary remand. Intervenor-Defendants
    Washington Environmental Council, Puget Soundkeeper, Friends of the Earth, and Washington
    State Department of Ecology (collectively, “Intervenors”) have stepped in for the agency. They
    deny that EPA committed any error, defend EPA’s authorization of the Puget Sound NDZ, and
    cross-move for summary judgment.
    For the reasons that follow, the court grants in part and denies in part American Waterways’
    motion for summary judgment, grants in part and denies in part Intervenors’ motion for summary
    judgment, and denies as moot EPA’s motion for reconsideration.
    II.    BACKGROUND
    A.     Legal Background
    This case concerns the State of Washington’s effort to prohibit recreational and commercial
    vessels from discharging sewage into the Puget Sound, an inlet of the Pacific Ocean along
    Washington’s northwestern coast. Under the Clean Water Act, EPA is required to set national
    “standards of performance for marine sanitation devices” that are “designed to prevent the
    2
    discharge of untreated or inadequately treated sewage into or upon the navigable waters.”
    
    33 U.S.C. § 1322
    (b)(1). Once EPA promulgates national standards, the standards serve as a floor,
    and no state is permitted to “adopt or enforce any statute or regulation” regarding marine sanitation
    devices that is less stringent than the national standards. See 
    id.
     § 1322(f)(1).
    In certain circumstances, however, a state may impose greater restrictions on vessel sewage
    discharge in the form of a No Discharge Zone, or NDZ. Under Section 312(f)(3), “if any State
    determines that the protection and enhancement of the quality of some or all of the waters within
    such State require greater environmental protection, such State may completely prohibit the
    discharge from all vessels of any sewage, whether treated or not, into such waters.”
    Id. § 1322(f)(3). There is, of course, a catch. Before a state can create an NDZ, it must obtain
    approval from EPA, which must “determine[] that adequate facilities for the safe and sanitary
    removal and treatment of sewage from all vessels are reasonably available for such water to which
    such prohibition would apply.” Id. After a state applies for permission to designate an NDZ, EPA
    has 90 days to make its determination on the reasonable availability of adequate facilities. Id.
    To facilitate EPA’s decision, agency regulations require that a state’s application to create
    an NDZ include the following:
    (1)     A certification that the protection and enhancement of the
    waters described in the petition require greater
    environmental protection than the applicable Federal
    standard;
    (2)     A map showing the location of commercial and recreational
    pump-out facilities;
    (3)     A description of the location of pump-out facilities within
    waters designated for no discharge;
    (4)     The general schedule of operating hours of the pump-out
    facilities;
    (5)     The draught requirements on vessels that may be excluded
    because of insufficient water depth adjacent to the facility;
    3
    (6)      Information indicating that treatment of wastes from such
    pump-out facilities is in conformance with Federal law; and
    (7)      Information on vessel population and vessel usage of the
    subject waters.
    
    40 C.F.R. § 140.4
    (a). Additionally, EPA has published extensive guidance for state and local
    officials that are interested in establishing NDZs under Section 312(f)(3). See A.R. at 2326–623. 1
    B.      Factual Background
    1.       Application for a Puget Sound NDZ
    Prior to petitioning EPA for an NDZ, the State of Washington, acting through its
    Department of Ecology (“Ecology”), and its partner organizations studied water quality in the
    Puget Sound for four years. See A.R. at 57. These studies led Ecology to conclude that federal
    marine discharge requirements were insufficient to protect the Puget Sound’s water quality,
    primarily because vessels were discharging treated sewage near shellfish beds and swimming
    beaches. See 
    id. at 66
    . The Puget Sound was already facing serious degradation from pollution:
    some of the waters of the Puget Sound were “designated as impaired waters under the Clean Water
    Act” because of poor water quality indicators, including “high concentrations of fecal indicator
    bacteria.” 
    Id. at 67
    . The Washington Department of Health ultimately closed some public
    swimming beaches and shut down 36,000 acres of commercial shellfish harvest beds in the Sound
    due to poor water quality. 
    Id.
     Ecology hoped that securing an NDZ would “complement[] other,
    more substantive investments in sewage treatment, onsite systems, stormwater management,
    industrial treatment, and agricultural runoff control” that would revitalize the Puget Sound. 
    Id. at 66
    .
    1
    Citations to the Administrative Record (“A.R.”) can be found in the four-volume Joint Appendix, see ECF Nos. 61,
    61-1, 61-2, 61-3.
    4
    In July 2016, Ecology requested EPA’s permission to designate the Puget Sound as an
    NDZ, submitting a petition that reflected water quality studies, outreach to vessel operators, and
    an analysis of the costs and benefits of creating an NDZ. 
    Id. at 57, 68
    . Ecology also submitted a
    supplement to its petition in October 2016, after EPA asked for more information on the
    availability of “pumpout” facilities. See 
    id. at 127
    ; 
    id.
     at 128–45 (Ecology’s October 2016
    supplement titled “Commercial Vessel Pumpout Availability in Puget Sound”). As the name
    implies, a pumpout facility removes, or “pumps out,” sewage from a vessel.
    On November 7, 2016, EPA published notice of its preliminary determination that adequate
    facilities for the safe and sanitary removal and treatment of sewage from all vessels were
    reasonably available in the Puget Sound. 
    81 Fed. Reg. 78,141
    -02. The notice sought public
    comment, with the original deadline for comments set for December 7, 2016. 
    Id. at 78,141
    . On
    December 7, after receiving stakeholder requests for additional time, EPA announced that it would
    extend the deadline for comments to December 23, 2016. A.R. at 55541.
    2.      EPA’s Determination
    On January 19, 2017, after receiving more than 40,000 comments on Ecology’s
    application, 
    id. at 33
    , EPA published notice of its final determination. It found that “adequate
    facilities for the safe and sanitary removal and treatment of sewage from all vessels are reasonably
    available” in the Puget Sound, 
    id.
     at 1–31.
    In its determination, EPA considered separately the availability of sewage pumpout
    facilities for recreational and commercial vessels. As to recreational vessels, EPA found that there
    were at most 171 recreational vessels per pumpout facility in the Puget Sound. 
    Id.
     at 5–6. EPA
    concluded that this ratio was well below the minimum ratio of 600 recreational vessels per
    pumpout facility that the Fish and Wildlife Service recommended was reasonable under the Clean
    5
    Vessel Act, 
    id. at 727
    , and therefore determined that adequate pumpout facilities were reasonably
    available in the Puget Sound for recreational vessels. 
    Id. at 6
    .
    As for commercial vessels, EPA estimated that there were 709 such vessels operating in
    the Puget Sound based on a study conducted by the Puget Sound Maritime Air Forum and
    information provided by commenters. 
    Id. at 7
    . In reaching this total, EPA excluded “large,
    oceangoing transient commercial vessels that are only in Puget Sound for a short period of time.”
    
    Id.
     The agency did so after finding that such vessels “have large enough holding tanks to hold
    their waste during the time they are in Puget Sound, with some exceptions[,] . . . [and therefore]
    do not have a need to pumpout.” 
    Id.
     EPA then subtracted additional commercial vessels, including
    the fleets of the Washington State Ferries, the U.S. military, and the Victoria Clipper, because they
    have “dedicated pumpout facilities” and would not use other facilities. 
    Id. at 7, 9
    . EPA ultimately
    determined that there were 631 commercial vessels operating in the Puget Sound that would
    require pumpout facilities. 
    Id. at 9
    .
    EPA then found that there were “at least 56 pumpouts available for commercial vessels”
    in the Puget Sound, including both stationary and mobile pumpout facilities. 
    Id.
     Based on the
    estimated 631 vessels, this created a ratio of 11 commercial vessels per pumpout facility. 
    Id.
     In
    addition to this 11:1 ratio, EPA “considered the fact that . . . mobile pumpouts provide service
    throughout Puget Sound, provide sufficient capacity for commercial vessels, and generally do not
    experience dock access issues.” 
    Id.
     EPA also noted that such mobile pumpout services could be
    scheduled by appointment and that service providers had reported that they did not “experience
    seasonal fluctuations” in demand. 
    Id.
     “Given the widespread availability and flexibility of these
    services and the overall ratio of 11:1, EPA determine[d] that adequate pumpout facilities for the
    safe and sanitary removal and treatment of sewage for commercial vessels are reasonably available
    6
    for the waters of Puget Sound.” 
    Id.
     at 9–10. EPA’s final decision was published in the Federal
    Register on February 13, 2017. 
    Id.
     at 45–48.
    With EPA’s sign off in hand, Ecology established an NDZ in the Puget Sound. See 
    Wash. Admin. Code § 173-228-030
    . Ecology established two effective dates for the NDZ. The default
    effective date for “all vessels” was May 10, 2018. See 
    id.
     § 173-228-050. However, for “[t]ug
    boats, commercial fishing vessels, small commercial passenger vessels, and National Oceanic and
    Atmospheric Administration (NOAA) research and survey vessels,” Ecology “delayed
    implementation . . . [for] five years,” meaning an effective date for such vessels of May 10, 2023.
    Id. The members of Plaintiff American Waterways, “a national trade association for the tugboat,
    towboat, and barge industry,” are subject to the five-year delayed implementation. See Pl.’s Mot.
    for Summ. J., ECF No. 46 [hereinafter Pl.’s Mot.], at 4, 12.
    C.      Procedural Background
    In December 2018, American Waterways brought this suit, alleging that EPA’s
    determination was arbitrary and capricious under the Administrative Procedure Act, 
    5 U.S.C. § 706
    , and that EPA was not authorized to issue a determination on Ecology’s purportedly
    defective petition under Section 312(f)(3) of the Clean Water Act, 
    33 U.S.C. § 1322
    (f)(3). Compl.,
    ECF No. 1, ¶¶ 54–57, 61–62.
    Before any substantive motions were filed, EPA moved to remand without vacatur so that
    the agency could consider compliance costs, a factor it had eschewed in its “reasonable
    availability” determination. Mot. to Remand to EPA, ECF No. 25 [hereinafter First Remand Mot.].
    EPA had taken the position that “neither the Clean Water Act nor EPA’s implementing regulations
    contemplate or require that EPA consider the cost of retrofitting vessels, the practical
    considerations related to retrofitting vessels to achieve compliance, or the cost of using pump-out
    7
    facilities.” A.R. at 15. But following American Waterways’ Complaint, EPA explained that it
    “now believes,” based on the Supreme Court’s decision in Michigan v. EPA, 
    576 U.S. 743
     (2015),
    “that it should have considered compliance costs in making the challenged determination.” First
    Remand Mot. at 4.
    The court denied EPA’s motion. The court observed that EPA had “admit[ted] no error,”
    and instead had argued that, although the Clean Water Act did not necessarily require it to weigh
    costs, the Act could not “‘be read to prohibit EPA from doing so.’” Memo. Op. & Order, ECF
    No. 41 [hereinafter Remand Op.], at 5 (quoting Reply in Supp. of EPA’s Remand Mot., ECF
    No. 32, at 3). The court exercised its discretion to deny remand in part because no new
    developments rendered EPA’s determination infirm; rather, Michigan v. EPA, on which EPA
    based its change of heart, “was decided two years before EPA issued its decision,” and commenters
    had raised the issue of costs during the Section 312(f)(3) process. 
    Id.
     at 5–6. The court also
    concluded that granting EPA’s remand request would unduly prejudice Intervenors’ environmental
    interests and create uncertainty for regulated parties. 
    Id.
     at 7–8.
    EPA then tried to shore up its case for remand. On March 26, 2020, EPA issued a formal
    memorandum declaring that it had taken “the legally erroneous position that it was not required
    to, and did not, consider costs” in issuing its “reasonable availability” determination as to the Puget
    Sound NDZ. Cross-Mot. for Recons., ECF No. 49 [hereinafter Mot. for Recons.], Ex. 1, ECF
    No. 49-1 [hereinafter EPA Costs Memo], at 1. Upon further review, the agency concluded, “the
    Supreme Court’s decision in Michigan v. EPA . . . compels EPA to consider costs in determining
    whether such facilities are ‘reasonably available.’” 
    Id.
     (emphasis added). EPA also promised that
    “the Office of Water is developing a tool to calculate the costs on the vessel community associated
    with the reasonable availability of facilities within a proposed no-discharge zone.” 
    Id. at 3
    .
    8
    Meanwhile, this litigation continued to move forward. On January 17, 2020, the court
    issued a scheduling order for briefing on cross-motions for summary judgment. Minute Order,
    Jan. 17, 2020. American Waterways filed its motion for summary judgment, as directed, on
    February 26, 2020. See Pl.’s Mot. That motion challenged the Puget Sound NDZ determination
    on four grounds, all under the APA: (1) EPA failed to determine that there were “adequate”
    facilities for the “treatment” of sewage, as required by Section 312(f)(3); (2) the agency failed to
    consider costs in determining the “reasonable availability” of facilities in the Puget Sound, as
    required under Michigan v. EPA; (3) EPA’s finding that pumpout facilities are “reasonably
    available” was flawed; and (4) the agency improperly disregarded deficiencies in Ecology’s
    Section 312(f)(3) petition. See Pl.’s Mot.
    EPA did not fully respond to American Waterways’ motion; nor did it cross move for
    summary judgment. Instead, the agency filed a consolidated opposition and a “Cross-Motion for
    Reconsideration,” in which the agency conceded error only on the Michigan v. EPA cost issue and
    again asked the court to remand the case in its entirety. See Mot. for Recons. The agency mounted
    no defense to the other three challenges but urged the court not to reach those issues, so that the
    agency “on remand . . . [could] reevaluate the rest of the determination.” 
    Id. at 1
    . Taking up the
    agency’s mantle, Intervenors defended the Puget Sound NDZ determination in full and asked the
    court to reject EPA’s renewed request for remand and enter summary judgment in their favor.
    Def.-Intervenors’ Cross-Mot. for Summ. J., ECF No. 52 [hereinafter Intervenors’ Br.]. The court
    heard oral argument on the parties’ motions on November 13, 2020.
    9
    IV.    DISCUSSION
    The court turns first to EPA’s motion for reconsideration and then takes up the cross-
    motions for summary judgment.
    A.      Motion for Reconsideration of Motion to Remand
    Under Rule 54(b), the court may “reconsider an interlocutory order as justice requires.”
    Capitol Sprinkler Inspection, Inc. v. Guest Servs., Inc., 
    630 F.3d 217
    , 227 (D.C. Cir. 2011) (internal
    quotation marks omitted). “[A]sking ‘what justice requires’ amounts to determining, within the
    Court’s discretion, whether reconsideration is necessary under the relevant circumstances.” Cobell
    v. Norton, 
    224 F.R.D. 266
    , 272 (D.D.C. 2004). The court likewise “has broad discretion to decide
    whether and when to grant an agency’s request for a voluntary remand.” Limnia, Inc. v. U.S. Dep’t
    of Energy, 
    857 F.3d 379
    , 381 (D.C. Cir. 2017). Here, EPA does not claim that the typical triggers
    for remand—the occurrence of events outside the agency’s control or new evidence, Carpenters
    Indus. Council v. Salazar, 
    734 F. Supp. 2d 126
    , 132 (D.D.C. 2010)—support its request for
    reconsideration. Rather, EPA’s request turns on its memo formalizing its new position on the
    impact of the Supreme Court’s 2015 decision in Michigan v. EPA. The memo states that EPA’s
    prior “position that it was not required to . . . consider costs in issuing its determination in 2017”
    was “legally erroneous” under Michigan v. EPA. EPA Costs Memo at 1.
    While EPA has now admitted error, the court is not convinced that justice requires granting
    EPA’s motion for reconsideration, which would have the effect of preempting resolution of the
    pending motions for summary judgment. One of the driving purposes of remanding a matter to an
    agency is to conserve “the courts’ and the parties’ resources.” See Ethyl Corp. v. Browner, 
    989 F.2d 522
    , 524 (D.C. Cir. 1993); see also 
    id.
     at 524 n.3 (collecting cases where remand was granted
    prior to significant events in the development of the case); Carpenters Indus. Council, 
    734 F. Supp. 10
    2d at 132 (noting voluntary remand “preserves scarce judicial resources by allowing agencies to
    cure their own mistakes” (internal quotation marks omitted)). That objective would not be served
    were the court to remand this case in its present posture. The court has before it hundreds of pages
    of briefing on cross-motions for summary judgment. Those motions squarely present issues that
    go beyond EPA’s failure to consider costs. If the court were to remand to EPA for a determination
    of costs, EPA would lack guidance on the validity of American Waterways’ other challenges, and
    the parties potentially could be mired in piecemeal litigation over EPA’s determination for years
    to come. No one benefits from such an approach. The court therefore concludes that it is in the
    parties’ best interests, and that of the public, for the court to resolve the ripe cross-motions for
    summary judgment. As the court reaches the merits of the parties’ dispute, and will remand the
    matter as a remedy, EPA’s motion for reconsideration will be denied as moot.
    B.      Cross-Motions for Summary Judgment
    1.      Legal Standard
    “[S]ummary judgment is the mechanism for deciding whether as a matter of law an agency
    action is supported by the administrative record and is otherwise consistent with the APA standard
    of review.” Louisiana v. Salazar, 
    170 F. Supp. 3d 75
    , 83 (D.D.C. 2016). In reviewing an agency
    action under the APA, “the district judge sits as an appellate tribunal,” and “[t]he entire case on
    review is a question of law.” Am. Bioscience, Inc. v. Thompson, 
    269 F.3d 1077
    , 1083 (D.C.
    Cir. 2001) (internal quotation marks omitted). The court’s analysis must be confined to the
    administrative record and should involve “neither more nor less information than” was before “the
    agency when it made its decision.” CTS Corp. v. EPA, 
    759 F.3d 52
    , 64 (D.C. Cir. 2014) (internal
    quotation marks omitted). The district court’s “review is ‘narrow’ and [it] will ‘not substitute [its]
    judgment for that of the agency.’” U.S. Sugar Corp. v. EPA, 
    830 F.3d 579
    , 605 (D.C. Cir. 2016)
    11
    (alterations omitted) (quoting Motor Vehicle Mfrs. Ass’n v. State Farm Mut. Auto. Ins. (State
    Farm), 
    463 U.S. 29
    , 43 (1983)).
    The APA requires courts to “hold unlawful and set aside agency action, findings, and
    conclusions” that are “arbitrary, capricious, an abuse of discretion, or otherwise not in accordance
    with the law.” 
    5 U.S.C. § 706
    (2)(A). “Although the arbitrary and capricious standard of review
    is deferential, the court will ‘intervene to ensure that the agency has examined the relevant data
    and articulated a satisfactory explanation for its action.’” BellSouth Corp. v. FCC, 
    162 F.3d 1215
    ,
    1221–22 (D.C. Cir. 1999) (alterations omitted) (quoting Petroleum Commc’ns, Inc. v. FCC, 
    22 F.3d 1164
    , 1172 (D.C. Cir. 1994)). An agency’s decision is arbitrary and capricious if the agency
    relies “on factors which Congress has not intended it to consider, entirely fail[s] to consider an
    important aspect of the problem, offer[s] an explanation for its decision that runs counter to the
    evidence before the agency, or is so implausible that it could not be ascribed to a difference in
    view or the product of agency expertise.” State Farm, 
    463 U.S. at 43
    .
    2.      Failure to Consider Costs
    The court first turns to the parties’ dispute regarding whether EPA was required to consider
    compliance costs under Section 312(f)(3) of the Clean Water Act. American Waterways and EPA
    both argue that Michigan v. EPA required the agency to consider the costs of compliance as part
    of the “reasonable availability” determination required under Section 312(f)(3). See Pl.’s Mot.
    at 20–22; Mot. for Recons. at 5–7. Intervenors dispute this, arguing that (1) the logic of Michigan
    does not apply to the statutory scheme at issue here, (2) the text of Section 312(f)(3) is silent as
    to costs, and (3) the statute prioritizes environmental protection over economic considerations.
    Intervenors’ Br. at 19–25.
    12
    Although the parties largely devote their time to parsing Michigan, the Supreme Court’s
    earlier decision in Whitman v. American Trucking Associations, 
    531 U.S. 457
     (2001), is the better
    place to begin. In Whitman, the Court considered whether a provision of the Clean Air Act
    instructing EPA to set ambient air quality standards that were “requisite to protect the public health
    with an adequate margin of safety” required the agency to consider “the economic cost of
    implementing” the proposed standards. 
    531 U.S. at
    465–66 (internal quotation marks omitted).
    The Court concluded that Congress’s instruction for EPA to issue “requisite” standards with an
    “adequate margin of safety” did not constitute a “textual commitment of authority to the EPA to
    consider costs” in setting air quality standards. 
    Id. at 468
    . It was “implausible,” the Court found,
    that by using the “modest words” “requisite” and “adequate,” Congress bestowed on EPA “the
    power to determine whether implementation costs should moderate national air quality standards.”
    
    Id.
     Rather, the text of the provision at issue, “interpreted in its statutory and historical context and
    with appreciation for its importance to the [Clean Air Act] as a whole, unambiguously bar[red]
    cost considerations from the” standard-setting process. 
    Id. at 471
    ; see also Murray Energy Corp.
    v. EPA, 
    936 F.3d 597
    , 621 (D.C. Cir. 2019) (rejecting “the same argument rejected in Whitman”
    that costs should be considered in setting air quality standards).
    More than a decade later, in Michigan, the Supreme Court considered a different provision
    of the Clean Air Act, this time evaluating a provision that directed EPA to regulate emissions from
    power plants if it concluded that “regulation [wa]s appropriate and necessary.” 576 U.S. at 748.
    There, EPA found that it was “‘appropriate and necessary’” to regulate power-plant emissions, but
    the agency concluded that it was not required “to consider whether the costs of its decision
    outweighed the benefits.” Id. at 749–50. The Michigan Court disagreed, finding that the term
    “‘[a]ppropriate and necessary’” was “a far more comprehensive criterion than ‘requisite to protect
    13
    the public health,’” the phrase at issue in Whitman. Id. at 756 (internal quotation marks omitted).
    The word “‘appropriate,’” the Court reasoned, was “the classic broad and all-encompassing term
    that naturally and traditionally includes consideration of all the relevant factors.” Id. at 752
    (internal quotation marks omitted). Cost was one such relevant factor: “Read naturally in the
    present context, the phrase ‘appropriate and necessary’ requires at least some attention to cost.” Id.
    Read together, Whitman and Michigan stand for the proposition that whether an agency is
    required to consider costs depends on the breadth of the statutory text and the degree to which it
    compels the agency to balance costs and benefits. Since the Supreme Court decided Michigan,
    courts in this Circuit have helpfully fleshed out the Whitman–Michigan dichotomy. For example,
    in Utility Solid Waste Activities Group v. EPA, the D.C. Circuit concluded that EPA was not
    required to consider costs when determining whether a waste site should be classified as an “open
    dump.” 
    901 F.3d 414
    , 448–49 (D.C. Cir. 2018). The statute there directed EPA to determine “if
    there is no reasonable probability of adverse effects on health or the environment from disposal of
    solid waste at such facility.” 
    Id. at 449
     (emphasis omitted) (internal quotation marks omitted).
    The Circuit held that the statute did not contain an “explicit mention of costs,” nor was “there any
    flexible language such as ‘appropriate and necessary’ that might allow the EPA to consider costs
    in rulemaking.” Id.; see also Nicopure Labs, LLC v. FDA, 
    266 F. Supp. 3d 360
    , 401 (D.D.C. 2017)
    (holding statute that said the FDA “shall” regulate products that the Secretary deemed to be
    tobacco products did not permit consideration of costs because “[t]he statute does not limit the
    Secretary’s authority to deem to when he finds it ‘appropriate and necessary’ to do so”). In
    contrast, in Metlife, Inc. v. Financial Stability Oversight Council, the district court determined that
    the Council was required to consider costs when designating Metlife for supervision by the Board
    of Governors of the Federal Reserve System under the Dodd–Frank Act. 
    177 F. Supp. 3d 219
    ,
    14
    224–25, 230 (D.D.C. 2016). The Dodd–Frank Act instructed the Council to consider ten statutory
    criteria in deciding whether to designate a financial institution, as well as “any other risk-related
    factors that [it] deems appropriate.” 
    Id. at 225
     (quoting 
    12 U.S.C. § 5323
    (a)(2)(K)). The statute’s
    use of the word “appropriate,” the court held, required the Council to consider costs in making any
    designation. 
    Id. at 241
    . As in Michigan v. EPA, “‘[a]ppropriate’ is . . . the touchstone of the catch-
    all factor in Dodd–Frank Section 113,” and that “textual hook,” the court held, required the Council
    “to consider the cost of designating a company for enhanced supervision.” 
    Id.
     at 240–41.
    Turning then to the present case, the court begins, as required, with the statutory text.
    Section 312(f)(3) provides, in relevant part, that
    if any State determines that the protection and enhancement of the
    quality of some or all of the waters within such State require greater
    environmental protection, such State may completely prohibit the
    discharge from all vessels of any sewage, whether treated or not,
    into such waters, except that no such prohibition shall apply until
    the Administrator determines that adequate facilities for the safe and
    sanitary removal and treatment of sewage from all vessels are
    reasonably available for such water to which such prohibition
    would apply.
    
    33 U.S.C. § 1322
    (f)(3) (emphasis added). The question before the court is whether EPA’s mandate
    to determine whether adequate facilities are “reasonably available” is a textual direction from
    Congress to EPA to consider costs. It is.
    Section 312(f)(3) of the Clean Water Act more closely resembles the statutes at issue in
    Michigan and Metlife than those at issue in Whitman and Utility Solid Waste. The term “reasonably
    available” is precisely the type of language that the Michigan Court held “naturally and
    traditionally includes consideration of all the relevant factors.” 576 U.S. at 752 (internal quotation
    marks omitted); see also id. at 755 (considering parenthetically the boundaries of “the expansive
    word ‘reasonable’”). Indeed, the Court said as much in explaining its decision: “reasonable
    15
    regulation ordinarily requires” an agency to consider the “advantages and the disadvantages of
    agency decisions.” Id. at 753 (first emphasis added) (internal quotation marks omitted); see also
    Int’l Union, United Auto., Aerospace & Agr. Implement Workers of Am., UAW v. OSHA, 
    938 F.2d 1310
    , 1319 (D.C. Cir. 1991) (“‘Reasonableness’ has long been associated with the balancing of
    costs and benefits.”). “Reasonable availability” therefore provides the “textual hook,” Metlife,
    177 F. Supp. 3d at 241, that requires EPA to consider costs when approving an NDZ.
    Logic likewise dictates that the agency was required to consider costs. Say, hypothetically,
    that the only pumpout facilities available to commercial vessels were all located in a remote portion
    of the Puget Sound. Even if those pumpout facilities were sufficient in number, no one would
    seriously contend that such facilities were “reasonably available” if they imposed significant costs
    on vessels to reach them. Cf. Michigan, 576 U.S. at 752 (“One would not say that it is even
    rational, never mind ‘appropriate,’ to impose billions of dollars in economic costs in return for a
    few dollars in health or environmental benefits.”). There can be little doubt that Congress intended
    for EPA to consider the costs of accessing adequate facilities in determining whether such facilities
    were “reasonably available.”
    Intervenors launch three primary attacks against the application of Michigan to this case.
    First, Intervenors argue that Section 312(f)(3) requires the states that seek to create an NDZ—not
    EPA—to consider the costs of compliance, and Ecology did so here. Intervenors’ Br. at 20–21.
    Second, Intervenors argue that the relevant statutory scheme fundamentally differs from the
    provision in Michigan because it does not contain an explicit congressional directive to consider
    costs. Id. at 22–23. Third, Intervenors claim that Congress “prioritized environmental protection
    under § 312(f)(3)” to the exclusion of cost considerations. Id. at 23–25. None of these arguments
    is persuasive.
    16
    a.      The statutory scheme
    Intervenors first assert that, because Section 312(f)(3) calls for states, as opposed to EPA,
    to regulate and limits EPA’s role to approving a state’s decision to regulate, the state, rather than
    EPA, should balance the costs and benefits of creating an NDZ. Id. at 21–23. But that contention
    cannot be squared with the plain statutory text. Section 312(f)(3) places an independent obligation
    on EPA to consider costs. It requires “the Administrator” of EPA to “determine[] that adequate
    facilities . . . are reasonably available.” 
    33 U.S.C. § 1322
    (f)(3). Thus, the textual hook that requires
    consideration of all relevant factors—the “reasonable availability” of adequate facilities—is
    delegated directly to EPA, not to states petitioning EPA. The Administrator, having been charged
    with determining whether adequate facilities are reasonably available, must consider “the
    advantages and the disadvantages” of his decision, see Michigan, 576 U.S. at 753, regardless of
    whether the petitioning state also does so.
    b.      Explicit directive
    Intervenors next attempt to distinguish Michigan by arguing that, while the statutory
    scheme in Michigan explicitly called for the considerations of costs, the same is not true here.
    Intervenors’ Br. at 22–23. They also contend that Congress did not intend for EPA to consider
    costs in Section 312(f)(3) because Congress explicitly required EPA to consider costs in making
    different determinations under other subsections of the same section of the Clean Water Act but
    did not specifically do so in Section 312(f)(3). Id. at 22 (citing 
    33 U.S.C. § 1322
    (b)(1) (requiring
    EPA to promulgate regulations for marine sanitation devices “after giving appropriate
    consideration to the economic costs involved”); 
    id.
     § 1322(n)(b)(B)(vii) (requiring consideration
    of “the economic costs of the installation and use of the marine pollution control device” for armed
    service vessels); id. § 1322(o)(B)(vii) (requiring consideration of “the economic costs of the use
    17
    of the management practice” in determining such practices for recreational vessels); id.
    § 1322(p)(6)(C)(ii)(III) (allowing exclusion of installed ballast water management systems if
    “with respect to the use of which[,] the environmental, health, and economic benefits would exceed
    the costs”)). Neither argument meaningfully distinguishes this case from Michigan.
    The provision at issue in Michigan no more expressly required consideration of costs than
    does the statutory text at issue here. Neither statutory provision explicitly mentions costs. Rather,
    both statutes use broad language—“appropriate and necessary” in Michigan, and “reasonably
    available” here—to convey consideration of cost as a factor. To read Michigan as applicable only
    in situations in which the statute explicitly calls for the consideration of costs would ignore the
    Court’s primary reason for requiring the agency to consider costs: that “it is unreasonable to read
    an instruction to an administrative agency to determine whether ‘regulation is appropriate and
    necessary’ as an invitation to ignore cost.” 576 U.S. at 753. The difference in statutory text is not
    a basis on which to distinguish Michigan.
    Moreover, the Michigan Court rejected a challenge similar to Intervenors’ assertion here
    that the express reference to costs in nearby statutory provisions meant that Congress did not intend
    for EPA to consider costs under Section 312(f)(3). In Michigan, EPA “point[ed] out that other
    parts of the Clean Air Act expressly mention cost,” but that the provision at issue did not. Id.
    at 754. The Court responded that “this observation shows only that [the statute’s] broad reference
    to appropriateness encompasses multiple relevant factors (which include but are not limited to
    cost); other provisions’ specific references to cost encompass just cost.” Id. at 755. The Court
    held that it was “unreasonable to infer that, by expressly making cost relevant to other decisions,
    the Act implicitly makes cost irrelevant to” other decisions committed to the agency. Id.; see also
    Metlife, Inc., 177 F. Supp. 3d at 241 (“[The Council] points to adjacent terms in Dodd–Frank that
    18
    expressly mention cost. But the Michigan Court considered and rejected the same argument.”
    (citation omitted)). Similarly here, the fact that other provisions of Section 312 explicitly require
    the consideration of costs does not mean cost is irrelevant to Section 312(f)(3). If anything, the
    emphasis on cost in these other sections, as in Michigan, “reinforces the relevance of cost” as a
    factor to be considered under Section 312(f)(3). 576 U.S. at 753.
    c.      Priority of environmental protection
    Finally, Intervenors urge that Congress intended Section 312(f)(3) to prioritize
    environmental protection over all else and thus EPA was not permitted to consider costs.
    Intervenors’ Br. at 23–25. But the cases that Intervenors marshal in support of this argument are
    inapposite. For example, in Union Electric Co. v. EPA, the disputed provision of the Clean Air
    Act enumerated eight criteria that a state program implementing EPA’s standards needed to satisfy,
    and if the program satisfied the eight criteria, the statute provided that the Administrator “shall”
    approve the state plan. 
    427 U.S. 246
    , 257 (1976). The Court concluded that “[t]he mandatory
    ‘shall’ makes it quite clear that the Administrator is not to be concerned with factors other than
    those specified.” 
    Id.
     Likewise, the statute at issue in Whitman instructed EPA to determine the
    maximum concentration of certain airborne pollutants that “public health can tolerate” and to
    decrease that concentration to “provide an ‘adequate’ margin of safety.” 
    531 U.S. at 465
    . The
    Court found EPA should not consider costs because Congress used “modest words” that limited
    the scope of the agency’s inquiry. See 
    id. at 468
    ; see also Citizens to Preserve Overton Park, Inc.
    v. Volpe, 
    401 U.S. 402
    , 411 (1971) (forbidding Secretary from approving project to use public
    parkland unless there was “no feasible and prudent alternative,” which the Court concluded meant
    that “only the most unusual situations are exempted” (internal quotation marks omitted)). In these
    19
    cases, Congress expressed a “priority” for environmental protection by severely restricting the
    factors the agency could consider and narrowly defining the scope of its review.
    In contrast, Section 312(f)(3)’s requirement that the Administrator determine whether
    adequate facilities are “reasonably available” uses language that traditionally requires
    “consideration of all the relevant factors,” including a balancing of costs and benefits. See
    Michigan, 576 U.S. at 772–73; see also Int’l Union, United Auto., Aerospace & Agr. Implement
    Workers of Am., UAW, 
    938 F.2d at 1319
    ; Mingo Loan Coal Co. v. EPA, 
    829 F.3d 710
    , 735 (D.C.
    Cir. 2016) (Kavanaugh, J., dissenting) (“In order to act reasonably, EPA must consider costs before
    exercising its Section 404(c) authority to veto or revoke a permit.”). Given Section 312(f)(3)’s
    capacious language, no overriding environmental-protection priority is evident in the provision. 2
    *         *        *
    The court holds that EPA was required to consider the costs of compliance in determining
    whether adequate facilities were “reasonably available.”                     EPA specifically disavowed any
    consideration of costs, erroneously concluding that “neither the Clean Water Act nor EPA’s
    implementing regulations contemplate or require that EPA consider the cost” of an NDZ. A.R.
    at 15; see Mot. for Recons. at 1 (“EPA refused to consider costs when determining whether certain
    sewage facilities in Puget Sound are ‘reasonably available.’”). EPA therefore acted arbitrarily and
    capriciously in violation of the APA. The agency will have to consider costs on remand.
    2
    Intervenors also argue that requiring EPA to consider costs permits the agency “to unilaterally consider costs to
    industry, without considering the harm to states.” Intervenors’ Br. at 24–25. The court disagrees. Because the
    touchstone of EPA’s analysis is the “reasonable availability” of facilities, costs are just one factor EPA must consider
    in determining whether adequate facilities are reasonably available. The reasonableness of the costs of a proposed
    NDZ may vary depending on environmental concerns, among other factors.
    20
    3.       Availability of Adequate Treatment Facilities
    American Waterways next argues that EPA acted arbitrarily and capriciously by not
    determining whether adequate facilities for the treatment (as opposed to the removal) of
    wastewater are reasonably available in the Puget Sound. Pl.’s Mot. at 14–20. Intervenors counter
    that EPA satisfied its obligations to verify the existence of adequate treatment facilities by
    requiring Ecology to certify how pumpout companies treat the waste they remove and that, by dint
    of a separate EPA regulatory scheme, the public treatment facilities that accept marine sewage
    meet federal requirements. Intervenors’ Br. at 14–15.
    Section 312(f)(3) requires EPA to determine whether adequate facilities are reasonably
    available for both the “removal and treatment of sewage.” 
    33 U.S.C. § 1322
    (f)(3) (emphasis
    added). 3 EPA therefore must inquire into the reasonable availability of adequate treatment
    facilities and “articulate[] a rational connection” between its factual conclusions and its
    determination that adequate treatment facilities are reasonably available in the Puget Sound. See,
    e.g., Clean Wis. v. EPA, 
    964 F.3d 1145
    , 1161 (D.C. Cir. 2020) (internal quotation marks omitted).
    That is, EPA must “make[] an ‘attempt at explanation or justification’” for its decision that there
    were adequate, reasonably available treatment facilities for marine sewage and provide this court
    “with a ‘way to know [its] methodology.’” Nat’l Wildlife Fed. v. EPA, 
    286 F.3d 554
    , 564 (D.C.
    Cir. 2002) (quoting Engine Mfrs. Ass’n v. EPA, 
    20 F.3d 1177
    , 1182 (D.C. Cir. 1994)); see also
    Chamber of Argentine-Paraguayan Producers of Quebracho Extract v. Holder, 
    332 F. Supp. 2d 43
    , 49 (D.D.C. 2004) (noting agency’s “decisionmaking path” must be “reasonably” discernable
    from the record (internal quotation marks omitted)).
    3
    EPA’s guidance on Section 312(f)(3) applications reflects this construction. It requires applicants to “describe the
    waste disposal process for each pumpout facility and dump station” and “indicate that these practices comply with
    current Federal, state, and local regulations and, in some cases, explain how they comply.” A.R. at 2376.
    21
    EPA failed to meet its obligation. The record is devoid of any explanation for EPA’s
    finding that adequate sewage treatment facilities are reasonably available in the Puget Sound.
    Intervenors suggest that “EPA based [its] determination [as to treatment facilities] on the fact that
    the majority of pumped sewage is sent to wastewater treatment plants, and some is treated at onsite
    septic tanks ‘that meet federal requirements.’”        Def.-Intervenors’ Reply Br., ECF No. 60
    [hereinafter Intervenors’ Reply], at 2. But the portion of the record that Intervenors cite relates to
    only facilities that treat sewage from recreational vessels—it says nothing about treatment of
    sewage from all vessels, or importantly here, treatment of sewage from commercial vessels. See
    A.R. at 43 (discussing pumpout and treatment facilities for “the recreational vessel population”
    and noting “[t]he majority of pumped sewage is sent to wastewater treatment plants; however,
    some is sent to onsite septic tanks that meet federal requirements”); see also Intervenors’ Reply
    at 2 (noting EPA made separate determinations for recreational and commercial vessels in this
    section). Intervenors cannot point to, and the court cannot find, any similar determination by EPA
    with respect to facilities that deal with commercial marine sewage.
    If anything, the record appears to suggest that the agency deliberately avoided making a
    determination regarding the reasonable availability of adequate treatment facilities. In response to
    a comment expressing concern about “sewage facilities accepting septage,” EPA said that its
    “authority under . . . Section 312(f)(3) is limited to evaluating the reasonable availability of
    pumpout facilities” and “[a]ny considerations as to whether an individual wastewater treatment
    facility has the capacity to accept vessel sewage would appropriately lie within the jurisdiction of
    that municipality or utility.” A.R. at 31. That position cannot be squared with the clear statutory
    text. Congress directed EPA to consider the reasonable availability of adequate facilities to remove
    “and” treat sewage. 
    33 U.S.C. § 1322
    (f)(3). While Intervenors suggested at oral argument that
    22
    EPA did not mean that it had eschewed all consideration of treatment facilities, the record contains
    no explanation or further context for this statement or, most importantly, any countervailing
    evidence that EPA did consider the reasonable availability of treatment facilities. On this record,
    the court must conclude that EPA did not make a reasoned determination as to the availability of
    sewage treatment facilities. See Nat’l Mar. Safety Ass’n v. OSHA, 
    649 F.3d 743
    , 753 (D.C. Cir.
    2011) (remanding where record was “almost devoid” of analysis beyond the agency’s “bare
    conclusion”).
    Intervenors’ attempts to fill the gaps in the agency’s reasoning are both impermissible and
    unconvincing. “[C]ourts may not accept . . . counsel’s post hoc rationalizations for agency action.”
    State Farm, 
    463 U.S. at 50
    . “[A]n agency’s action must be upheld, if at all, on the basis articulated
    by the agency itself.” Id.; see also SEC v. Chenery Corp., 
    332 U.S. 194
    , 196 (1947) (“[A]
    reviewing court, in dealing with a determination or judgment which an administrative agency alone
    is authorized to make, must judge the propriety of such action solely by the grounds invoked by
    the agency.”); Clean Wis., 964 F.3d at 1162–63 (rejecting argument because court could not
    “accept counsel’s post hoc rationalizations for agency action” (alteration omitted) (internal
    quotation marks omitted)). Having already discerned that EPA did not conduct any inquiry into
    the availability of treatment facilities in the Puget Sound, Intervenors’ post hoc explanation cannot
    stand in as surrogate for the agency’s own explanation. 4
    4
    In their reply brief, Intervenors also suggest that the issue of the reasonable availability of adequate wastewater
    treatment facilities was not raised before EPA. Intervenors’ Reply at 2, 5. “[A] party will normally forfeit an
    opportunity to challenge an agency [decision] on a ground that was not first presented to the agency for its initial
    consideration.” Advocs. for Highway & Auto Safety v. Fed. Motor Carrier Safety Admin., 
    429 F.3d 1136
    , 1150 (D.C.
    Cir. 2005). Intervenors, however, first raised this argument in their reply brief, so they have forfeited their forfeiture
    argument. See Se. Ala. Med. Ctr. v. Sebelius, 
    572 F.3d 912
    , 920 n.7 (D.C. Cir. 2009) (refusing to consider argument
    that issue that was not raised “with the agency at the appropriate time” was waived because the parties did not raise
    the purported waiver “with th[e] court at the appropriate time”).
    23
    But even if this court were to accept Intervenors’ explanation as EPA’s, the record still
    would be insufficient. Intervenors argue that EPA did verify the availability of treatment facilities
    because Ecology’s petition showed that most sewage “would be treated at publicly owned
    treatment works,” which are “regulated under the Clean Water Act” and must “obtain National
    Pollutant Discharge Elimination System permits.” Intervenors’ Br. at 14. Therefore, Intervenors
    suggest, EPA was certain that “publicly owned treatment works treat sewage in a safe and sanitary
    manner.” 
    Id.
     But the only evidence of such a consideration in the record consists of Ecology’s
    own tables that simply list the name of the “Discharge Location” for pumpout facilities. See A.R.
    at 137–39 tbls. 5&6. Nowhere does the record state that EPA determined, based on Ecology’s list
    of discharge locations, that all sewage facilities were federally regulated and therefore there were
    adequate treatment facilities reasonably available in the Puget Sound. Moreover, even crediting
    Intervenors’ argument that the sewage would be properly treated, the record contains no evidence
    and reveals no consideration by EPA of whether existing treatment plants could accommodate the
    extra sewage that likely would need to be processed if the Puget Sound became an NDZ.
    Intervenors’ statement that “EPA verified that four commercial marine work companies
    can discharge vessel sewage to any publicly owned treatment facility located throughout Puget
    Sound” is likewise without basis.      Intervenors’ Br. at 14.     To substantiate their assertion,
    Intervenors identify four conversations that EPA held with commercial marine work companies.
    
    Id.
     at 14–15 (citing notes from conversations at A.R. 655, 657, 659, and 678). But these
    conversations could hardly have supported EPA’s finding regarding adequate treatment facilities.
    EPA’s notes from three of the conversations contain no discussion of sewage treatment. See A.R.
    at 655, 657, 659. And EPA’s notes from the fourth conversation include a single bullet point
    stating, “The same companies that come to take oil/waste streams can also take sewage waste.
    24
    And then take it to a municipality for disposal.” Id. at 678. This lone bullet point—in the four-
    volume Joint Appendix the parties submitted—reveals nothing about the capacity of the
    municipality to accept more marine sewage, nor does it establish that all commercial marine work
    companies can take marine sewage to a municipality, or that this is a routine practice. It therefore
    cannot save EPA’s determination.
    To receive this court’s deference, EPA must show its work. See Kirwa v. U.S. Dep’t of
    Def., 
    285 F. Supp. 3d 257
    , 269–70 (D.D.C. 2018). EPA did not show that it considered the
    reasonable availability of adequate sewage treatment facilities, and its determination that such
    facilities exist was therefore arbitrary and capricious. On remand, EPA must explain its reasoning
    for its determination as to the existence of adequate, reasonably available treatment facilities in the
    Puget Sound, which may include additional fact finding as necessary. 5
    4.       EPA’s Methodology for Determining the Availability of Pumpout Facilities
    American Waterways next takes issue with EPA’s methodology for determining that
    adequate pumpout facilities are reasonably available. Pl.’s Mot. at 28–39. It argues that EPA’s
    determination was arbitrary and capricious because the agency (1) excluded large oceangoing
    vessels from its estimate when calculating a ratio of commercial vessels to pumpout facilities, 
    id.
    at 28–31; (2) did not appropriately respond to a comment stating that two companies’ fleets were
    excluded from its estimate of vessels, 
    id.
     at 31–32; and (3) did not consider characteristics of
    certain vessels that are relevant to determining whether such vessels can access pumpout facilities,
    
    id.
     at 32–39. Intervenors disagree. They respond that (1) EPA’s estimate of vessels properly
    excluded any vessels that would not require the use of pumpout facilities in the Puget Sound and
    5
    Because the court concludes that EPA did not explain its basis for determining that adequate treatment facilities are
    reasonably available in the Puget Sound, it does not reach American Waterways’ remaining argument on the adequacy
    of sewage treatment at municipalities near the Puget Sound, see Pl.’s Mot. at 18–20.
    25
    (2) even if more vessels should have been included in EPA’s estimate, additional vessels would
    have had little impact on the vessels-to-facilities ratio. Intervenors’ Br. at 25–30. Intervenors also
    argue that (3) EPA directly addressed comments regarding how the characteristics of certain
    vessels might limit access to pumpout facilities and no more was required of the agency. 
    Id.
    at 30–39. The court takes each purported flaw in EPA’s methodology in turn.
    a.      Vessels estimate
    American Waterways’ objections to EPA’s vessels estimate wade into waters where the
    agency is typically afforded the utmost deference. “[W]hen agency decisions involve complex
    judgments about sampling methodology and data analysis that are within the agency’s technical
    expertise, they receive an extreme degree of deference.” Dist. Hosp. Partners, L.P. v. Burwell,
    
    786 F.3d 46
    , 60 (D.C. Cir. 2015) (internal quotation marks omitted). “Although the plaintiff[] may
    disagree with the science or the methodology the [agency] elects to use, absent a statutory mandate
    that requires a particular methodology, the agency’s choice of methodology need only be
    ‘reasonable’ to be upheld.” Colo. River Cutthroat Trout v. Salazar, 
    898 F. Supp. 2d 191
    , 209
    (D.D.C. 2012) (citing Am. Wildlands v. Kempthorne, 
    530 F.3d 991
    , 998–99 (D.C. Cir. 2008)).
    Even if EPA’s vessel count was ultimately “less than perfect, imperfection alone does not amount
    to arbitrary decision-making.” Dist. Hosp., 786 F.3d at 61.
    EPA offered a reasonable explanation for why it excluded large oceangoing vessels from
    its vessels estimate and thus its vessels-to-pumpout-facilities ratio. EPA stated in its Final
    Determination:
    The large, oceangoing transient commercial vessels that are only in
    Puget Sound for a short period of time . . . have large enough holding
    tanks to hold their waste during the time they are in Puget Sound,
    with some exceptions. . . . [T]hese vessels do not have a need to
    26
    pumpout and were not included when assessing the adequacy of
    pumpout facilities.
    A.R. at 7. In support of this conclusion, EPA pointed to information supplied by Ecology,
    including a 2013 survey titled Phase 2 Commercial Vessel Sewage Management and Pumpout:
    Puget Sound No Discharge Zone for Vessel Sewage. Id. at 22–23. 6 American Waterways
    nonetheless presses that EPA must count all vessels—regardless of their need to use pumpout
    facilities—and that some large oceangoing vessels, even those with holding tanks, may ultimately
    need pumpout facilities. Pl.’s Mot. at 28–30. These arguments fall flat.
    EPA’s obligation under Section 312(f)(3) is to determine if removal and treatment facilities
    are “reasonably available” in the Puget Sound. 
    33 U.S.C. § 1322
    (f)(3). It would make no sense
    for EPA to develop a commercial vessels-to-facilities ratio, or otherwise tailor its methodology, to
    account for boats that do not require any pumpout or treatment services. Padding the vessels count
    with such empty numbers would not yield any additional information about the number of facilities
    that are required to adequately remove and treat marine sewage. EPA thoroughly explained its
    logic for reducing its estimate of vessels, and this court finds no fault in EPA’s conclusion.
    The statutory text does not compel a different result. American Waterways emphasizes
    Section 312(f)(3)’s reference to “all vessels,” but, read in context, that reference is to only those
    vessels that actually require disposal and treatment services in the Puget Sound. Before a state can
    completely prohibit vessels from discharging sewage in specific waters, EPA is directed to
    “determine[] that adequate facilities for the safe and sanitary removal and treatment of sewage
    6
    American Waterways argues that it was improper for EPA to rely on this survey, rather than a global survey, in
    reaching its determination. Pl.’s Reply at 18. EPA, however, offered a reasonable explanation for relying on
    Ecology’s 2013 study rather than American Waterways’ proposed global study: There was “no information to suggest
    that the results of the world survey are representative of vessels in Puget Sound.” A.R. at 23. Because EPA has
    offered a reasonable explanation for its choice, that choice is entitled to this court’s deference. See Coal. of Battery
    Recyclers Ass’n v. EPA, 
    604 F.3d 613
    , 619–21 (D.C. Cir. 2010) (concluding that EPA “adequately justified” its choice
    of studies and deferring to that decision).
    27
    from all vessels are reasonably available for such water.” 
    33 U.S.C. § 1322
    (f)(3). The statutory
    focus is thus on the reasonable availability of adequate facilities for vessels that actually require
    “safe and sanitary removal and treatment” services. It would make little sense for “all vessels” to
    include vessels that do not need the very facilities whose reasonable availability EPA is required
    to assess. Section 312(f)(3) therefore did not compel the inclusion of oceangoing vessels in EPA’s
    count. 7
    Nor does the court find any basis to require EPA to develop a model that accommodates
    every contingent circumstance in which vessels that rarely need pumpout services in the Puget
    Sound require emergency service. EPA exercised its discretion in excluding such vessels and
    specifically explained that it had “confirmed that no large cruise ships” had requested authorization
    to directly discharge in the Puget Sound since 2012. A.R. at 27. The court cannot conclude that
    it was unreasonable for EPA to exclude ships that generally do not need to discharge in the Puget
    Sound and in practice had not had an emergency need to do so in the five years preceding the NDZ.
    b.       EPA’s response to comments regarding excluded fleets
    American Waterways next asserts that EPA’s response to a comment stating that EPA had
    failed “to consider at least two companies’ entire fleets” was inadequate. Pl.’s Mot. at 31. The
    law of this Circuit is settled that an agency must “respond to ‘relevant’ and ‘significant’ public
    comments,” but it need not respond to comments that “do not disclose the factual or policy basis
    on which they rest.” Pub. Citizen, Inc. v. FAA, 
    988 F.2d 186
    , 197 (D.C. Cir. 1993) (first quoting
    Home Box Office, Inc. v. FCC, 
    567 F.2d 9
    , 35 & n.58 (D.C. Cir. 1977); then quoting 
    id.
     at 35 n.58);
    see also Nat’l Shooting Sports Found., Inc. v. Jones, 
    716 F.3d 200
    , 215 (D.C. Cir. 2013)
    7
    Notably, EPA also excluded other types of vessels in its count—including Washington State Ferries and U.S. military
    vessels—that have their own dedicated pumpout facilities, see A.R. 7, 9, but American Waterways registers no
    complaint as to these exclusions.
    28
    (“[C]omments which themselves are purely speculative and do not disclose the factual or policy
    basis on which they rest require no response.” (internal quotation marks omitted)). As EPA
    explained in its response to the disputed comment, the commenter did not identify the “number of
    additional existing vessels [that] may have been excluded.” A.R. at 22. The commenter claimed
    two fleets were missing but provided the number of vessels (six) for only one of the missing fleets.
    
    Id.
     at 21–22; see 
    id. at 54962
    . EPA’s response demonstrated that small discrepancies in the
    commercial vessel count, which already included more than 600 vessels, were not substantial
    enough to alter its analysis. 
    Id. at 22
    . And without information regarding the size of the other
    missing fleet or information substantiating the commenter’s claim that the “numbers should be
    higher,” 
    id.,
     EPA could not reasonably assess how its model might have fallen short and the degree
    to which its estimates needed to be reconsidered. In such a circumstance, no additional response
    was required.
    Moreover, minor deficiencies in an agency’s data do not provide this court with a basis to
    conclude that the agency acted arbitrarily and capriciously. See Dist. Hosp., 786 F.3d at 61
    (holding that an agency’s reliance on an imperfect dataset “alone does not amount to arbitrary
    decision-making”); Catawba County v. EPA, 
    571 F.3d 20
    , 45 (D.C. Cir. 2009) (“EPA used the
    best information available in making its designations, and that is all our precedent requires.”).
    Thus, any shortcomings in EPA’s response are not grounds for remand. See Nat’l Shooting Sports
    Found., Inc., 716 F.3d at 215 (“[O]nly comments which, . . . if adopted, would require a change in
    an agency’s proposed rule cast doubt on the reasonableness of a position taken by the agency.”
    (internal quotation marks omitted)).
    29
    c.      EPA’s use of a vessels-to-facilities ratio
    Finally, American Waterways offers a broadside attack on EPA’s determination that
    adequate pumpout facilities exist, particularly contesting EPA’s use of a ratio to determine whether
    there were reasonably available facilities for all vessels. American Waterways first identifies
    multiple logistical issues that it claims EPA failed to address properly. See Pl.’s Mot. at 32–38. It
    then argues that EPA failed to explain why a simple ratio was helpful to its determination and why
    a ratio of 11 vessels to 1 pumpout facility meant that pumpout facilities were reasonably available.
    Id. at 38–39.
    First, American Waterways argues that EPA failed to consider the logistical challenges
    commercial vessels would face when attempting to use pumpout facilities, including concerns
    about large boats accessing facilities, mobile facilities gaining security access to certain docks, and
    the time and cost of using pumpout services. Id. at 32–36. American Waterways also argues that
    EPA ignored concerns about seasonal demand for services. See id. at 38. These arguments boil
    down to discontent with EPA’s conclusion that mobile pumpout facilities, which EPA concluded
    resolve many of American Waterways’ complaints, can service commercial vessels that are unable
    to use stationary pumpout facilities. EPA acknowledged the very same logistical challenges that
    American Waterways now raises and concluded that they were not prohibitive:
    EPA has determined that there are numerous mobile pumpout
    facilities with the capacity to serve large commercial vessels and
    that service all of Puget Sound. Among the five pumpout companies
    identified in Ecology’s petition, approximately 52 pumpout trucks
    and two mobile commercial pumpout vessels are available to service
    all of Puget Sound. As such, the geographic location or vessel
    access restrictions at the two stationary pumpout facilities in
    Bellingham are not determinative.
    A.R. at 24. The agency went on to explain precisely how mobile pumpout facilities could solve
    some of the challenges that vessels faced and delineated separate responses regarding the number
    30
    of mobile pumpout companies, services provided, capacity of mobile pumpouts, dock access and
    security concerns, and seasonal demand. Id. at 25–26. American Waterways may disagree with
    the conclusions EPA reached during notice and comment, but that does not convert EPA’s
    reasoned response to the type of non-response that “demonstrates that the agency’s decision was
    not ‘based on a consideration of the relevant factors.’” Thompson v. Clark, 
    741 F.2d 401
    , 409
    (D.C. Cir. 1984) (quoting Overton Park, 
    401 U.S. at 416
    ). This court will not substitute its
    judgment for EPA’s.
    Second, American Waterways claims that EPA was “dismissive” of a comment from
    American Cruise Lines relaying concerns about pumping sewage from the American Spirit, a small
    cruise ship. Pl.’s Mot. at 37–38; A.R. at 54928–40. But American Waterways’ argument is based
    on a selective excerpt of EPA’s thorough response to American Cruise Lines. EPA’s response
    explained, for example, why American Cruise Lines’ concerns about pumpout times were
    unfounded based on its research and further explained that, while the American Spirit might need
    to adjust its itinerary or operations to accommodate the time needed to pump out, this did not
    render pumpout facilities unavailable. See A.R. at 27. There is thus no truth to American
    Waterways’ claim that EPA “dismiss[ed] rather than address[ed]” the issues American Cruise
    Lines raised. Pl.’s Mot. at 38. EPA’s response satisfies the court that the agency “examine[d] the
    relevant data and articulate[d] a satisfactory explanation for its action.” State Farm, 
    463 U.S. at 43
    .
    Third, American Waterways argues that, particularly considering the aforementioned
    logistical challenges, EPA acted arbitrarily and capriciously (1) by basing its determination that
    facilities were reasonably available on a ratio of commercial vessels to pumpout facilities and
    (2) by failing to explain the relevance of that ratio. Pl.’s Mot. at 34–38. Intervenors counter that
    31
    EPA properly responded to these logistical concerns and that EPA considered a ratio of
    commercial vessels to pumpout facilities as but one factor of several in determining that adequate
    pumpout facilities are reasonably available in the Puget Sound. Intervenors’ Br. at 30–32, 37–39.
    In reviewing an agency’s use of a given model, “judicial deference . . . cannot be utterly
    boundless.” Chemical Mfrs. Ass’n v. EPA, 
    28 F.3d 1259
    , 1265 (D.C. Cir. 1994). This court will
    find EPA’s model “arbitrary and capricious if there is simply no rational relationship between the
    model and . . . [the situation] to which it is applied.” Greater Yellowstone Coal. v. Kempthorne,
    
    577 F. Supp. 2d 183
    , 198 (D.D.C. 2008) (internal quotation marks omitted). “Generally, the court
    defers the determination of fit between the facts and the model to the EPA, so that the agency
    rather than the court may balance marginal losses in accuracy against marginal gains in
    administrative efficiency and timeliness of decision making.” Chemical Mfrs. Ass’n, 
    28 F.3d at 1265
    .
    The record before the court reveals that EPA did not simply compute a ratio and call it
    quits. Rather, EPA reached out to multiple pumpout providers to ascertain any restrictions on
    vessel size, capacity, time to pump out, dock access, and seasonality. A.R. at 24–27; 
    id.
     at 655–60,
    668–70, 672–74, 676–79 (records of conversations with pumpout facilities). EPA explicitly stated
    that its determination was based, in part, on information gleaned from these conversations, which
    satisfied the agency that (1) “mobile pumpouts provide service throughout Puget Sound, provide
    sufficient capacity for commercial vessels, and generally do not experience dock access issues”;
    and (2) “services can be scheduled by appointment to accommodate vessel needs and itineraries,
    and are sufficiently diversified such that they do not experience seasonal fluctuations.” 
    Id.
     at 8–9.
    Thus, without deciding whether a ratio by itself is a permissible methodology for determining
    whether facilities are reasonably available, EPA’s decision here was more nuanced than the simple
    32
    calculation of a ratio that American Waterways suggests. See Pub. Emps. for Env’t Resp. v. U.S.
    Dep’t of Interior, 
    832 F. Supp. 2d 5
    , 24, 26 (D.D.C. 2011) (rejecting argument that agency did not
    show that its “observations [we]re systematic, comprehensive, or scientific” because the court was
    required to “defer to the agency’s chosen methodology so long as it bears a rational relationship
    between the method and that to which it applied” (alterations omitted) (internal quotation marks
    omitted)).
    American Waterways’ second attack on EPA’s reliance on a ratio—that EPA failed to
    adequately explain the relative significance of its ratio—has more teeth. See Pl.’s Mot. at 38–39.
    “[T]he process by which an agency reaches its decreed result must be logical and rational.”
    Natural Res. Def. Council, Inc. v. Rauch, 
    244 F. Supp. 3d 66
    , 86 (D.D.C. 2017) (alterations
    omitted) (quoting Allentown Mack Sales & Serv., Inc. v. NLRB, 
    522 U.S. 359
    , 374 (1998)). To
    demonstrate that its process was logical and rational, EPA must, “at a minimum, provide[] an
    explanation for adopting” a given metric. See U.S. Sugar Corp., 830 F.3d at 652. EPA, however,
    did not provide any explanation for how an 11:1 ratio of commercial vessels to pumpout facilities
    supported the conclusion that pumpout facilities were reasonably available. See A.R. at 7–10.
    EPA did not, for example, explain whether there was a maximum permissible ratio for approving
    an NDZ or even if the 11:1 ratio fell into a given range of permissible ratios for commercial vessels.
    By contrast, with respect to recreational vessels, EPA explained that its ratio of 171 recreational
    vessels to one pumpout facility was appropriate by referring to the Clean Vessel Act’s guidance
    that there should be “one pumpout station for every 300-600 boats.” Id. at 4–6. EPA’s lack of
    explanation with respect to commercial vessels stands out in comparison.
    Intervenors attempt to make up for this shortcoming by noting that “[p]ast affirmative
    determinations shed some light” on why EPA found the 11:1 ratio reasonable, but Intervenors fail
    33
    to identify a single page in the record in which EPA itself looked to past determinations. See
    Intervenors’ Br. at 38. Without an explanation for why a ratio of 11 commercial vessels to one
    pumpout facility is reasonable, EPA has not shown that its reliance on this ratio was rational and
    logical. On remand, EPA will have the opportunity to explain why the 11:1 ratio supports a
    “reasonable availability” determination.
    5.       Scrutiny of Ecology’s Petition
    a.        Exclusion of key data
    American Waterways also argues that this court should vacate and remand EPA’s
    determination because Ecology’s petition for an NDZ did not include a map, operating hours, or
    draught restrictions for all facilities. American Waterways suggests that these omissions required
    EPA to reject Ecology’s petition. 8 Pl.’s Mot. at 39–44. Intervenors, naturally, have a different
    view. They argue that an appendix to Ecology’s petition provided most of the information
    American Waterways claims is missing and that EPA properly did not require a map of mobile
    pumpout facilities because they are, by definition, not fixed to a location. Intervenors’ Br.
    at 39–40.
    As a “general principle,” “it is always within the discretion of . . . an administrative agency
    to relax or modify its procedural rules adopted for the orderly transaction of business before it
    when in a given case the ends of justice require it.” Am. Farm Lines v. Black Ball Freight Serv.,
    
    397 U.S. 532
    , 539 (1970) (internal quotation marks omitted). For a court to undo an agency’s
    action due to the agency’s deviation from its procedures, the complaining party must make a
    8
    American Waterways also argues that EPA should have rejected Ecology’s petition because it did not include a
    statement that the treatment facilities in the petition complied with federal standards. See Pl.’s Mot. at 43–44. Because
    this court has already concluded that EPA’s analysis of wastewater treatment was insufficient and requires remand, it
    need not determine whether Ecology’s failure to include a certification of compliance with respect to treatment
    facilities renders EPA’s decision arbitrary and capricious.
    34
    “showing of substantial prejudice.” Associated Press v. FCC, 
    448 F.2d 1095
    , 1104 (D.C. Cir.
    1971) (internal quotation marks omitted).
    American Waterways contends that the American Farm Lines rule does not apply here
    because EPA’s procedures “confer important procedural benefits upon individuals,” 
    id.
     (internal
    quotation marks omitted), and “affect individuals’ rights,” see Chiron Corp. v. Nat’l Transp. Safety
    Bd., 
    198 F.3d 935
    , 944 (D.C. Cir. 1999). Pl.’s Mot. at 40–42. In such situations, American
    Waterways argues, courts have limited an agency’s ability to deviate from its procedures. 
    Id.
     But
    this comparison is inapt, and the court need look no further than American Waterways’ own case
    law to demonstrate why. American Waterways relies on Morton v. Ruiz, where the Supreme Court
    found that an agency distributing a federal assistance program for impoverished Native Americans
    needed to adhere to strict internal procedures to determine whether an applicant was entitled to
    benefits.   
    415 U.S. 199
    , 231–32, 235 (1974).         There, the “rights of individuals”—that is,
    individuals’ rights to federal benefits—were being adjudicated. 
    Id. at 235
    . In such a situation, the
    Supreme Court concluded that it was “incumbent upon” the agency “to follow [its] own
    procedures.” Id.; see also Mass. Fair Share v. Law Enf’t Assistance Admin., 
    758 F.2d 708
    , 711–12
    (D.C. Cir. 1985) (reaching a similar conclusion with respect to procedural requirements for
    finalizing grants to successful applicants). Here, by contrast, EPA did not adjudicate the individual
    rights of American Waterways’ members when it approved the Puget Sound NDZ—it merely
    determined that Washington may create an NDZ for those waters. Chiron Corp., 
    198 F.3d at 944
    (“Because an NTSB investigation does not itself determine the rights of the parties . . . the
    Guidance cannot be viewed as a binding rule on these terms.”). The American Farm Lines rule,
    and not a stricter one, therefore applies.
    35
    Following that rule, American Waterways fails to make a “showing of substantial
    prejudice,” even if EPA did deviate from its own procedure. Associated Press, 
    448 F.2d at 1104
    (internal quotation marks omitted). Although American Waterways vaguely claims that the lack
    of information made it difficult for the regulated community to access “the information necessary
    to meaningfully participate,” Pl.’s Mot. at 42–43, it offers no credible reason to believe that any
    person’s right to participate was impaired. First, American Waterways overstates the amount of
    information missing from Ecology’s petition. The petition contained a map of stationary pumpout
    facilities and identified where mobile pumpout facilities were based, although it did not depict the
    range of the mobile pumpout companies. A.R. at 111. An appendix to the petition titled “Pumpout
    Facility Information” further provided the hours of operation for the vast majority of pumpout
    facilities. See 
    id.
     at 119–24. The same appendix provided the “Min Depth at Low Tide” for each
    of the stationary facilities, although it did not do so for mobile pumpout facilities. 
    Id.
     As Ecology
    explained, such draught requirements would vary for mobile pumpout companies, depending on
    where they were providing services. See id. at 145.
    Second, with respect to the information that Ecology did omit from its petition, the record
    reveals that EPA received and responded to comments about each of the omitted issues—including
    the range of mobile pumpout facilities, access to such facilities, and their hours of operation. Id.
    at 25–26 (concluding marine work companies “will travel to the customer so that the distribution
    of services covers all of Puget Sound”; providing information on hours of operation in section
    titled “service provided”; explaining why “access to docks has not been an issue” for mobile
    pumpout facilities); id. at 23 (noting additional comment on lack of access to mobile facilities).
    American Waterways fails to identify what further comments it would have liked to offer or to
    36
    meaningfully address how EPA’s responses to the existing comments were insufficient to protect
    its interests.
    Moreover, EPA explained why the omissions in Ecology’s petition did not hamper its
    reasoned decisionmaking. It would not yield useful information, EPA explained, to require
    Ecology’s petition to comply with certain requirements for mobile pumpout facilities and pumper
    trucks because of the variable places and docks these facilities use. Id. at 18–19; see also id. at 145
    (Ecology noting that “[d]ue to the nature of pumper trucks[’] geographic mobility, and ability to
    operate in many different locations, mapping the companies or providing size of draught limits is
    not practical”). EPA also concluded that, given mobile pumpout companies’ ability to travel
    throughout the entire Puget Sound region, “mapping the specific locations of these companies
    would not add to EPA’s analysis or provide any further information for the regulated community.”
    Id. at 19.       EPA therefore concluded that, in this instance, strict adherence to the petition
    requirements would not be helpful in reaching its determination and therefore was unnecessary.
    On this record, the court concludes that it was not arbitrary or capricious for EPA to relax its
    requirements for Ecology’s Petition.
    b.     Certificate of Need
    Finally, American Waterways challenges EPA’s NDZ determination on the basis that EPA
    accepted without scrutiny Ecology’s Certificate of Need, which stated that the Puget Sound
    required protection from marine discharges that exceeded federal standards. Pl.’s. Mot. at 44. Not
    so, Intervenors contend. They argue that Congress gave the states, not EPA, the authority to
    determine whether certain waters require greater environmental protection and that second-
    guessing the Certificate of Need would have exceeded EPA’s authority. Intervenors’ Br. at 40–42.
    Intervenors also argue that American Waterways waived this argument by previously arguing to
    37
    the Washington Pollution Control Hearings Board that EPA lacked authority to review Ecology’s
    Certificate of Need. See id. at 40, 42.
    Turning first to Intervenors’ argument that American Waterways adopted a contrary
    position prior to this litigation, “[i]t is settled law that a party that presents a winning opinion
    before the agency cannot reverse its position before this court.” S. Coast Air Quality Mgmt. Dist.
    v. EPA, 
    472 F.3d 882
    , 891 (D.C. Cir. 2006); see also Del. Dep’t of Nat. Res. & Env’t Ctrl. v. EPA,
    
    895 F.3d 90
    , 96 (D.C. Cir. 2018) (“A petitioner may not take a position in this court opposite from
    that which it took below, particularly when its position has prevailed before the agency.” (internal
    quotation marks omitted)). In order to advance an argument on a petition for review, the party
    must have given “adequate notification of the general substance of the complaint” to the agency.
    S. Coast Air Quality Mgmt. Dist., 472 F.3d at 891.
    The record reveals that American Waterways’ position on EPA’s authority to review
    Ecology’s Certificate of Need has been inconsistent, but not fatally so. Before the Washington
    Pollution Control Hearings Board, American Waterways argued that the Board should stay
    Ecology’s Certificate until the Board could review it precisely because “EPA is only authorized to
    determine if adequate pump out facilities exist and will provide no substantive review of the
    Certificate of Need.” A.R. at 2806; see also id. at 2818 (arguing that concerns regarding the
    Certificate of Need “are not subject to EPA review”). During the notice-and-comment period,
    however, American Waterways nudged EPA to at least review Ecology’s Certificate of Need.
    American Waterways outlined its concerns regarding the Certificate of Need and argued, “EPA
    must play a role in evaluating the integrity of that certification, and should not render a final
    determination on adequacy of pump-out capacity since Ecology’s ‘certification’ is not based in
    fact.” Id. at 55273. While stopping short of asserting that EPA had an obligation to independently
    38
    verify the Certificate of Need, American Waterways suggested that its concerns about the
    Certificate “should inform EPA’s review of Ecology’s petition.” Id. at 55275. In the same
    paragraph, American Waterways nonetheless implied that EPA’s review was limited to
    determining “Ecology’s assertion that ‘the current number and location of pump-outs are
    sufficient’” to support an NDZ. Id.
    American Waterways’ position on this issue has certainly morphed depending on the
    audience, but its comments to EPA are not irreconcilably at odds with its position here. The court
    thus cannot conclude that American Waterways is precluded from challenging the Certificate of
    Need. See Del. Dep’t of Natural Resources & Env’t Ctrl., 895 F.3d at 96 (requiring a “clear
    contradiction” with a party’s position before the agency in order to foreclose judicial review).
    Accordingly, this court will consider whether EPA was obligated to review Ecology’s Certificate
    of Need.
    Starting, as it must, with the text of the statute, Lamie v. U.S. Tr., 
    540 U.S. 526
    , 534 (2004),
    the court concludes that Congress was clear that the petitioning state—not EPA—is entrusted with
    determining whether enhanced protection against marine sewage discharge is necessary. Section
    312(f)(3) delineates separate roles for the petitioning state and EPA. The state is entrusted with
    determining whether “the protection and enhancement of the quality of some or all of the waters
    within such State require greater environmental protection.” 
    33 U.S.C. § 1322
    (f)(3). Following
    that determination, EPA’s Administrator is tasked with determining whether “adequate facilities
    for the safe and sanitary removal and treatment of sewage from all vessels are reasonably
    available.” 
    Id.
     By design, the state and EPA work in separate spheres: the state identifies a need
    for greater protection from marine discharge, and EPA determines whether prohibition of marine
    39
    discharge will be feasible. The text of the statute therefore suggests EPA does not enjoy plenary
    review of the state’s Certificate of Need.
    This interpretation is consistent with the regulatory scheme Section 312(f) creates. See
    Nat’l Ass’n of Home Builders v. Defs. of Wildlife, 
    551 U.S. 644
    , 666 (2007) (“It is a fundamental
    canon of statutory construction that the words of a statute must be read in their context and with a
    view to their place in the overall statutory scheme.” (internal quotation marks omitted)). In
    contrast to Section 312(f)(3), which creates a path for a state to regulate an NDZ with EPA’s
    approval, Section 312(f)(4) calls for the Administrator to determine whether greater regulation of
    marine sewage is necessary. Under Section 312(f)(4), “[i]f the Administrator determines upon
    application by a State that the protection and enhancement of the quality of specified waters within
    such State requires such a prohibition,” EPA must then regulate to prohibit discharge in such
    waters. 
    33 U.S.C. § 1322
    (f)(4)(A) (emphasis added). Section 312(f)(4) therefore provides a useful
    comparison to Section 312(f)(3): Section 312(f)(4) explicitly directs the Administrator to assess
    the need for the protection and enhancement of water quality, and the Administrator is thereafter
    responsible for regulating to “prohibit the discharge from a vessel of any sewage (whether treated
    or not) into such waters.” 
    Id.
     In contrast, under Section 312(f)(3), where the state takes primary
    responsibility for regulating, the Administrator’s role is limited to ensuring that “adequate facilities
    for the safe and sanitary removal and treatment of sewage” are available. 
    Id.
     § 1322(f)(3).
    Based on the text of Section 312(f)(3) and its statutory context, the court concludes that
    EPA did not have a duty to independently verify Ecology’s Certificate of Need under
    Section 312(f)(3) and did not arbitrarily or capriciously accept the Certificate.
    40
    C.      Remedy
    The only remaining question before the court is whether to remand with vacatur, which
    would have the effect of undoing the Puget Sound NDZ, or remand without vacatur, which would
    allow the NDZ to continue while EPA acts on remand. American Waterways requests vacatur of
    EPA’s determination in its entirety or “partial vacatur as to certain affected vessel classes.” See
    Pl.’s Suppl. Mem. of Law, ECF No. 65 [hereinafter Pl.’s Suppl. Br.], at 3. EPA and Intervenors,
    meanwhile, principally argue that any remand should be without vacatur. See Mot. for Recons.
    at 9–10; Intervenors’ Reply at 15–17. Following supplemental briefing, Intervenors restated their
    position that this court, if it must remand, should remand without vacatur, but requested that if the
    court does vacate EPA’s determination, it vacate the determination solely with respect to American
    Waterways’ members. Def.-Intervenors’ Suppl. Br. Opposing Vacatur, ECF No. 64, at 3–4.
    “While unsupported agency action normally warrants vacatur,” whether to remand a rule
    with or without vacatur is committed to the district court’s discretion. See Advocs. for Highway
    & Auto Safety v. Fed. Motor Carrier Safety Admin., 
    429 F.3d 1136
    , 1151 (D.C. Cir. 2005) (noting
    “this court is not without discretion” in determining whether to vacate an agency decision); see
    also Heartland Reg’l Med. Ctr. v. Sebelius, 
    566 F.3d 193
    , 198 (D.C. Cir. 2009) (“[T]he terms
    ‘invalid’ and ‘vacated’ are not synonyms.”). “The decision whether to vacate depends on [1] the
    seriousness of the order’s deficiencies (and thus the extent of doubt whether the agency chose
    correctly) and [2] the disruptive consequences of an interim change that may itself be changed.”
    Allied-Signal v. U.S. Nuclear Regul. Comm’n, 
    988 F.2d 146
    , 150–51 (D.C. Cir. 1993) (internal
    quotation marks omitted).
    41
    1.      Seriousness of the Determination’s Deficiencies
    Here, the court has identified at least two sizeable flaws in EPA’s decisionmaking—its
    failure to consider the costs of compliance and its failure to determine whether adequate facilities
    for the treatment of marine sewage are reasonably available. In determining whether such flaws
    counsel in favor of vacating, the court considers whether “there is at least a serious possibility that
    the [agency] will be able to substantiate its decision on remand.” See Allied-Signal, Inc., 988 F.2d
    at 151; see also Williston Basin Interstate Pipeline Co. v. FERC, 
    519 F.3d 497
    , 504 (D.C.
    Cir. 2008) (remanding without vacatur after finding there was “a significant possibility that the
    [agency] may find an adequate explanation for its actions”).
    The court finds that there is a serious possibility that EPA will be able to substantiate its
    determination on remand. As to the likelihood that correcting EPA’s first flaw will alter the
    agency’s decision, there is no dispute that Ecology considered costs to the industry and presented
    EPA with an estimate of those costs in its petition. See Intervenors’ Br. at 20–21; Pl.’s Mot. at 22
    n.14. Thus, at least one regulatory body, Ecology, has already concluded that the costs of the
    regulation do not outweigh its benefits. See A.R. at 68 (explaining Ecology’s “multifaceted effort”
    to determine whether an NDZ was appropriate included “evaluating impact costs and benefits,”
    among numerous other considerations); id. at 71 (noting one consequence of considering costs was
    five-year implementation delay). EPA therefore is not starting from scratch. And although the
    agency ultimately disregarded costs, its responses to comments reveal some awareness of the issue.
    See id. at 15 (noting Ecology had created a five-year delayed implementation for some vessels to
    ease costs and providing examples of helpful cost information for commenters to gather). There
    is therefore a serious possibility that EPA will reissue the same determination after fully
    considering costs.
    42
    Likewise, there is a possibility that, after EPA considers the reasonable availability of
    adequate treatment facilities for marine sewage, it will again green light the NDZ. Nearly all the
    treatment facilities that Ecology has thus far identified are public treatment facilities. See id.
    at 137–39. And while American Waterways makes much of the fact that two public treatment
    facilities operate under consent decrees, Pl.’s Mot. at 17, EPA’s guidance on this issue suggests
    that “[d]ischarge to a public wastewater collection system and treatment facility” is one of two
    “preferable” disposal methods, A.R. at 2376. EPA’s guidance and the predominance of public
    treatment facilities in the record suggest there is at least a “non-trivial likelihood that” EPA will
    again permit Ecology to designate the Puget Sound as an NDZ, supporting remand without vacatur.
    See WorldCom, Inc. v. FCC, 
    288 F.3d 429
    , 434 (D.C. Cir. 2002).
    2.      Disruptive Consequences of an Interim Change
    Regarding the second Allied-Signal factor, the potential disruptiveness of vacatur, the court
    is concerned that vacating EPA’s determination at this juncture would have a negative impact on
    environmental conditions in the Puget Sound. As the D.C. Circuit has held, even where a court
    finds “more than several fatal flaws” in an agency action, it is nonetheless “appropriate to remand
    without vacatur in particular occasions where vacatur ‘would at least temporarily defeat . . . the
    enhanced protection of the environmental values covered by [the agency action at issue].’” North
    Carolina v. EPA, 
    550 F.3d 1176
    , 1178 (D.C. Cir. 2008) (per curiam) (quoting Env’t Def. Fund,
    Inc. v. Adm’r of the U.S. EPA, 
    898 F.2d 183
    , 190 (D.C. Cir. 1990)); see also Ctr. for Biological
    Diversity v. EPA, 
    861 F.3d 174
    , 189 (D.C. Cir. 2017) (per curiam) (remanding without vacatur
    because “vacating would at least temporarily defeat . . . the enhanced protection of the
    environmental values covered by [the action at issue].”). As this court stated in denying EPA’s
    motion for remand, the Puget Sound NDZ is a significant piece of a years-long initiative in the
    43
    State of Washington to improve the quality of the waters of the Puget Sound. Remand Op. at 7–8.
    Establishing the NDZ prompted the state’s Department of Health to reopen nearly 700 acres of
    commercial shellfish beds, which could close again if the NDZ is vacated. Id.; Intervenors’ Reply
    at 16–17. Additionally, vacating the NDZ would permit new recreational boaters to discharge
    partially treated sewage into the Puget Sound. Intervenors’ Reply at 15–16. The court therefore
    concludes that enhanced protection of the environmental integrity of the Puget Sound favors
    remand without vacatur.
    The court also finds that environmental-protection concerns outweigh the potential costs
    to commercial vessels of keeping the determination in place during remand. Washington’s NDZ
    regulations mitigate such costs. Ecology has delayed implementation of the new discharge
    requirements for “tug boats, commercial fishing vessels, small commercial passenger vessels, and
    National Oceanic and Atmospheric Administration (NOAA) research and survey vessels” until
    May 10, 2023. A.R. at 70–71 (footnote omitted). Accordingly, such vessels have another two-
    and-a-half years to take whatever steps are required to prepare to comply with the NDZ. See Dep’t
    of Ecology, State of Wash., Puget Sound Is Now a No-Discharge Zone for Vessel Sewage,
    https://ecology.wa.gov/Water-Shorelines/Puget-Sound/No-discharge-zone (last visited Nov.
    29, 2020).   This implementation delay provides regulated parties with a buffer while EPA
    reconsiders its determination.
    American Waterways nonetheless urges the court to vacate the NDZ on the ground that its
    continuation even while on remand will require its members “to expend significant resources” to
    retrofit their vessels by May 2023. See Pl.’s Reply Mem. of Law, ECF No. 56, at 24–27. American
    Waterways relies on the July 30, 2019 Declaration of Timothy Stewart, a Senior Director of Fleet
    Engineering and Shipyards at Foss Maritime Company (“Foss”), to substantiate its position. Pl.’s
    44
    Reply in Further Supp. of Cross-Mot. for Remand with Vacatur, ECF No. 39, Decl. of Timothy
    Stewart, ECF No. 39-1 [hereinafter Stewart Decl.], ¶ 1. Stewart avers that the vessels at Foss
    typically undergo maintenance twice every five years—once in the third year since the last full
    maintenance and once in the fifth year—and that off-schedule maintenance and work is “extremely
    costly.” 
    Id. ¶ 16
    . According to Stewart, two ships in Foss’s fleet were scheduled to be dry docked
    in March and April 2020 and not again until after the effective date of the NDZ. See 
    id. ¶ 22
    .
    Stewart’s Declaration suggests that these vessels were scheduled for retrofitting of new tanks
    during those months. See 
    id.
     Foss will continue to incur the expense of retrofitting other vessels
    in its fleet, at an average cost of $140,000. See 
    id.
    Though the court recognizes that companies like Foss may continue to incur costs during
    the remand period, Stewart’s Declaration alone does little to establish what the overall cost is likely
    to be. Stewart represents only one company, and the court has before it no evidence that other
    companies are likely to incur retrofitting costs in the near term or how much those costs might be.
    Even as to Foss, because the declaration is now over a year old, it remains unclear how much
    additional cost Foss is likely to incur in the coming months.           In short, though American
    Waterways’ members may face some costs of compliance during the remand period, those costs
    do not outweigh the potential environmental harm that would befall the Puget Sound were the
    court to vacate the NDZ.
    3.      Partial Vacatur
    American Waterways argues that, even if full vacatur is inappropriate, the court should at
    least grant partial vacatur of the determination “as to certain affected vessel classes.” Pl.’s Suppl.
    Br. at 3. In other words, American Waterways wants its members to be exempt from the NDZ
    until a final determination is made on remand. The court declines that invitation.
    45
    “Severance and affirmance of a portion of an administrative regulation is improper if there
    is ‘substantial doubt’ that the agency would have adopted the severed portion on its own.” North
    Carolina v. EPA, 
    531 F.3d 896
    , 929 (D.C. Cir. 2008) (internal quotation marks omitted). Section
    312(f)(3) of the Clean Water Act requires EPA to make a single determination as to “all vessels.”
    
    33 U.S.C. § 1322
    (f)(3) (emphasis added). The statute therefore gives EPA no authority to make
    piecemeal determinations that would affect some vessels but not others, and the court cannot
    conclude that EPA’s determination is segregable.
    The cases on which American Waterways primarily relies in requesting partial vacatur do
    not compel a different result. The courts in those cases ordered partial vacatur of regulations that
    were plainly divisible. For instance, in American Iron & Steel Institute v. OSHA, OSHA was
    required to investigate the feasibility of lead-exposure standards as to each specific industry to
    which the standard applied, and when the court found the standard was not feasible in certain
    industries, vacatur as to only those industries was the proper course. See 
    939 F.2d 975
    , 979–80,
    1010 (D.C. Cir. 1991). Likewise, in Petroleum Communications, Inc. v. FCC, the court vacated
    FCC’s cellular service regulation only as to licensees that provide coverage in the Gulf of Mexico.
    
    22 F.3d at 1173
    . The FCC regulatory scheme at issue already divided licensees into geographic
    regions. 
    Id. at 1166
    . And Petroleum Communications involved a special situation in which FCC
    had previously exempted Gulf of Mexico licensees from regulations because of the unique fact
    that they, unlike licensees anywhere else in the country, used towers that were attached to mobile
    oil and gas platforms floating in the ocean. 
    Id.
     at 1167–68. Here, by contrast, Congress did not
    instruct EPA to make specific determinations with respect to classes of vessels. Rather, Congress
    commanded EPA to make a single determination taking account of “all” vessels. 
    33 U.S.C. § 1322
    (f)(3). Partial vacatur therefore would not be appropriate.
    46
    *      *       *
    There remains the open question of how long EPA will be given to address deficiencies on
    remand. By statute, EPA must make its “determination within 90 days of the date of” a state’s
    application. 
    33 U.S.C. § 1322
    (f)(3). EPA’s review should therefore be prompt. On the other
    hand, EPA has yet to finalize its guidance on how the agency should consider costs in making a
    determination under Section 321(f)(3). Mot. for Recons. at 4 (noting that “[t]he agency is now
    developing cost-consideration guidance”); EPA Costs Memo at 3 (noting additional guidance is
    forthcoming).   But the lack of formal guidance should not prohibit EPA from proceeding
    expeditiously on remand.     Congress wanted EPA to act quickly, and so does this court.
    Accordingly, the court will order this matter remanded without vacatur for a period of 90 days.
    Any request for more time must be made by motion and based on a showing of good cause for an
    extension.
    V.     CONCLUSION AND ORDER
    For the foregoing reasons, the court (1) grants in part and denies in part Plaintiff’s Motion
    for Summary Judgment, ECF No. 46; (2) grants in part and denies in part Intervenors’ Cross-
    Motion for Summary Judgment, ECF No. 52; and (3) denies as moot EPA’s Motion for
    Reconsideration of Remand, ECF No. 49.
    The court remands the record to EPA for a period of 90 days for further consideration of
    the following issues, including any additional fact-gathering the agency deems necessary: (1) the
    costs of creating an NDZ in the Puget Sound; (2) the reasonable availability of adequate sewage
    treatment facilities in the Puget Sound; and (3) an explanation of EPA’s use of a ratio of
    commercial vessels to pumpout facilities to determine whether adequate treatment and removal
    47
    facilities are reasonably available in the Puget Sound. EPA’s determination is not vacated pending
    remand.
    Dated: November 30, 2020                                   Amit P. Mehta
    United States District Court Judge
    48