United States v. Transocean Deepwater Drilling, Inc. ( 2014 )


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  •      Case: 13-20243   Document: 00512774082      Page: 1   Date Filed: 09/18/2014
    IN THE UNITED STATES COURT OF APPEALS
    FOR THE FIFTH CIRCUIT
    United States Court of Appeals
    Fifth Circuit
    FILED
    No. 13-20243                      September 18, 2014
    Lyle W. Cayce
    UNITED STATES OF AMERICA,                                                  Clerk
    Plaintiff-Appellee
    v.
    TRANSOCEAN DEEPWATER DRILLING, INCORPORATED,
    Defendant-Appellant
    Appeal from the United States District Court
    for the Southern District of Texas
    Before REAVLEY, JONES, and GRAVES, Circuit Judges.
    REAVLEY, Circuit Judge:
    Transocean Deepwater Drilling, Inc. appeals from the district court’s
    order enforcing administrative subpoenas issued by the Chemical Safety and
    Hazard Investigation Board in connection with an investigation following the
    disaster on the Deepwater Horizon drilling unit in the Gulf of Mexico.
    Transocean contends that the subpoenas should have been quashed because
    the Board lacks authority to investigate the incident. We AFFIRM the district
    court’s judgment.
    I.
    On April 20, 2010, a blowout, explosion, and fire occurred during drilling
    operations at the Macondo lease site in the Gulf of Mexico. The Macondo well
    was being drilled by the Deepwater Horizon, a mobile offshore drilling unit
    Case: 13-20243    Document: 00512774082     Page: 2   Date Filed: 09/18/2014
    No. 13-20243
    (“MODU”) tasked to the job by Transocean. As a result of the incident, eleven
    people were tragically killed, a large volume of flammable gas, oil, and other
    hazardous substances were released into the water and ambient air, and
    substantial property damage occurred.
    Numerous governmental agencies responded to the disaster, including
    the Chemical Safety and Hazard Investigation Board (“CSB” or “the Board”).
    Established by the Clean Air Act Amendments of 1990 and modeled after the
    National Transportation Safety Board (“NTSB”), the CSB serves a public
    safety mission by investigating accidental releases of hazardous substances
    into the ambient air and by reporting to the public its findings and
    recommendations for preventing and minimizing the risk of industrial
    chemical accidents.
    As part of its investigation into the incident at the Macondo well, the
    CSB issued five administrative subpoenas to Transocean.          The subpoenas
    sought answers to interrogatories and the production of relevant records,
    including documents generated by Transocean’s own internal investigation.
    Transocean took the position that the CSB lacked authority to investigate the
    incident, and it therefore failed to comply fully with the CSB’s subpoenas.
    The United States filed a petition on behalf of the CSB to enforce the
    administrative subpoenas, while Transocean moved to quash them and to
    dismiss the petition. Transocean argued that the CSB was not authorized to
    conduct an investigation because, inter alia, the incident was a marine oil spill
    over which the CSB lacks jurisdiction, and the incident did not occur on a
    stationary source.
    The district court denied Transocean’s motion and ordered enforcement
    of the subpoenas. The district court held that the CSB was investigating only
    the release of airborne gases from the blowout and explosion and was not
    investigating the subsequent oil spill from the well.        The court further
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    determined that the CSB would lack authority to investigate an incident
    involving a marine oil spill only if the NTSB was authorized to investigate.
    The court held that the NTSB was not authorized to investigate this incident,
    however, because the incident was located fifty miles off the coast of the United
    States on the Outer Continental Shelf and did not involve a “vessel of the
    United States,” and because the incident was not transportation related. The
    court also concluded that the Deepwater Horizon and its subsea riser comprised
    a drilling installation that satisfied the statutory requirement of a “stationary
    source” from which the accidental release of gases the CSB was authorized to
    investigate. The district court therefore held that the CSB had authority to
    investigate the incident and to issue the administrative subpoenas.
    Transocean now appeals.
    II.
    Administrative subpoenas issued in aid of an investigation will generally
    be enforced judicially if “(1) the subpoena is within the statutory authority of
    the agency; (2) the information sought is reasonably relevant to the inquiry;
    and (3) the demand is not unreasonably broad or burdensome.” See Burlington
    N. R. Co. v. Office of Inspector Gen., R.R. Ret. Bd., 
    983 F.2d 631
    , 638 (5th Cir.
    1993); see also United States v. Powell, 
    379 U.S. 48
    , 57-58, 
    85 S. Ct. 248
    , 255
    (1964) (holding that enforcement of administrative subpoenas requires a
    showing “that the investigation will be conducted pursuant to a legitimate
    purpose, that the inquiry may be relevant to the purpose, that the information
    sought is not already within the [agency’s] possession, and that the
    administrative steps required by [statute] have been followed”).             The
    Government bears the initial burden to show that these criteria have been met,
    although the burden to make a prima facie case is “minimal.” United States v.
    Tex. Heart Inst., 
    755 F.2d 469
    , 474 (5th Cir. 1985), overruled on other grounds
    by United States v. Barrett, 
    837 F.2d 1341
     (5th Cir. 1988) (en banc). Once the
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    Government has made a prima facie case, the burden of going forward shifts
    to the party opposing the subpoenas. 
    Id.
    In this case, Transocean focuses its arguments on appeal on the
    authority of the CSB to issue the subpoenas. We review the district court’s
    factual findings underlying its decision on this issue for clear error and its
    conclusions of law de novo. Burlington, 
    983 F.2d at 638, 641
    .
    III.
    Transocean contends that the CSB had no authority to issue the
    administrative subpoenas because the CSB lacked jurisdiction to investigate
    the incident at the Macondo well. An administrative agency’s authority is
    necessarily derived from the statute it administers and may not be exercised
    in a manner that is inconsistent with the administrative structure that
    Congress has enacted. See FDA v. Brown & Williamson Tobacco Corp., 
    529 U.S. 120
    , 125, 
    120 S. Ct. 1291
    , 1297 (2000); see also Texas v. United States, 
    497 F.3d 491
    , 500-01 (5th Cir. 2007).      Here, as noted above, the CSB is an
    independent federal investigative agency established by the Clean Air Act
    Amendments of 1990. See Pub. L. No. 101-549, Title III, sec. 301, 
    104 Stat. 2399
     (Nov. 15, 1990). The Board is authorized to “investigate (or cause to be
    investigated), determine and report to the public in writing the facts,
    conditions, and circumstances and the cause or probable cause of any
    accidental release resulting in a fatality, serious injury or substantial property
    damages.”    
    42 U.S.C. § 7412
    (r)(6)(C)(i).     An “accidental release” is “an
    unanticipated emission of a regulated substance or other extremely hazardous
    substance into the ambient air from a stationary source.” § 7412(r)(2)(A). A
    “stationary source” is defined as “any buildings, structures, equipment,
    installations or substance emitting stationary activities (i) which belong to the
    same industrial group, (ii) which are located on one or more contiguous
    properties, (iii) which are under the control of the same person (or persons
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    under common control), and (iv) from which an accidental release may occur.”
    § 7412(r)(2)(C).
    A.
    Transocean argues first that the CSB lacked jurisdiction to investigate
    the incident at the Macondo well because the Deepwater Horizon is not a
    “stationary source” as that term is contemplated by the statute. Transocean
    reasons that because the word “stationary” in the term “stationary source” is
    not defined, the word must be construed as commonly understood, which
    Transocean contends means a fixed and unchanging object rather than
    something that is moveable. Transocean argues that the Deepwater Horizon
    was not only moveable but also was a “vessel in navigation.” It reasons,
    therefore, that the drilling unit could not be a stationary source. We disagree
    with Transocean’s reasoning.
    Transocean is correct that similar mobile offshore drilling units and
    other structures, and even the Deepwater Horizon itself, have been held to be
    vessels under maritime law. See, e.g., Demette v. Falcon Drilling Co., 
    280 F.3d 492
    , 498-99 (5th Cir. 2002), overruled in part on other grounds by Grand Isle
    Shipyard, Inc. v. Seacor Marine, LLC, 
    589 F.3d 778
     (5th Cir. 2009) (en banc).
    For example, in Demette, we noted that “special-purpose moveable drilling rigs,
    including jack-up rigs, are vessels within the meaning of admiralty law.”
    Demette, 280 F.3d at 498 n.18. It is also well-established that “special-purpose
    structures” may remain vessels under the Jones Act while engaged in drilling
    operations. See, e.g., Offshore Co. v. Robison, 
    266 F.2d 769
    , 776 (5th Cir. 1959).
    And under Supreme Court precedent a “watercraft practically capable of
    maritime transportation” is considered to be a “vessel” under the Longshore
    and Harbor Workers’ Compensation Act regardless of its purpose or state of
    transit at a particular moment. Stewart v. Dutra Constr. Co., 
    543 U.S. 481
    ,
    497, 
    125 S. Ct. 1118
    , 1129 (2005). Indeed, the Supreme Court held that a
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    watercraft does not “pass in and out of Jones Act coverage depending on
    whether it was moving at the time of the accident.” 
    Id. at 495-96
    , 
    125 S. Ct. at 1128
    . Based on the foregoing authority, the district court in the multi-district
    litigation spawned from the Macondo well incident held that the Deepwater
    Horizon was a vessel under general maritime law. See In re Oil Spill by the
    Oil Rig “DEEPWATER HORIZON” in the Gulf of Mexico, on April 20, 2010,
    
    808 F. Supp. 2d 943
    , 950 (E.D. La. 2011); see also In re Deepwater Horizon, 
    745 F.3d 157
    , 164 (5th Cir. 2014) (noting the vessel status of the drilling unit).
    Nevertheless, in this case we are not dealing with the application of, or
    definitions under, the Jones Act and general maritime law. The fact that the
    Deepwater Horizon may be a vessel for purposes of maritime law does not
    answer the question whether it meets the specific statutory definition of a
    “stationary source” under the Clean Air Act.
    The phrase “stationary source” is expressly defined by the Clean Air Act.
    When Congress provides a specific definition of a term, we must accept that
    meaning and limit our analysis to the prescribed definition. See Stenberg v.
    Carhart, 
    530 U.S. 914
    , 942, 
    120 S. Ct. 2597
    , 2615 (2000) (“When a statute
    includes an explicit definition, we must follow that definition, even if it varies
    from that term’s ordinary meaning.”); cf. Hamilton v. United Healthcare of La.,
    Inc., 
    310 F.3d 385
    , 391 (5th Cir. 2002) (“A fundamental canon of statutory
    construction instructs that in the absence of a statutory definition, we give
    terms their ordinary meaning.” (emphasis added)); see also United States v.
    Crittenden, 
    372 F.3d 706
    , 711 (5th Cir. 2004) (Dennis, J., concurring in part
    and dissenting in part) (“[W]hen context dictates that a term has a particular
    definition, that definition will apply instead of the plain meaning of the term.”).
    We therefore must apply the definition of “stationary source” provided within
    § 7412(r)(2)(C).
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    We find nothing within the definition of “stationary source” found in
    § 7412(r)(2)(C) that precludes a vessel from satisfying the statutory
    requirements for a stationary source. Indeed, counsel for Transocean conceded
    during oral argument that a vessel could be stationary, but he argued that the
    drilling unit here was in constant motion over the well because of the unit’s
    stabilizing thrusters. The amicus makes the same argument, contending that
    under Coast Guard regulations the Deepwater Horizon was a vessel considered
    to be underway.
    Of course, the whole point of the stabilizing thrusters is to keep the
    drilling unit largely stationary over the well so that it can perform its drilling
    operation, a “stationary activity.” See § 7412r(2)(c). Regardless whether the
    unit is considered to be underway, the Deepwater Horizon was “dynamically-
    positioned” and “employed a satellite global positioning device and complex
    thruster technology to stabilize itself.”     In re Oil Spill by the Oil Rig
    “DEEPWATER HORIZON” in the Gulf of Mexico, on April 20, 2010, 
    808 F. Supp. 2d 943
    , 950 (E.D. La. 2011) (emphasis added). Its eight directional
    thrusters were used to keep the rig in place over the wellhead during drilling.
    National Commission on the BP Deepwater Horizon Oil Spill and Offshore
    Drilling, Macondo: The Gulf Oil Disaster, Chief Counsel’s Report 29 (2011),
    available    at    http://www.eoearth.org/files/164401_164500/164423/full.pdf
    (hereinafter “Chief Counsel’s Report”).
    It is true that the Deepwater Horizon was capable of propulsion.
    However, this propulsion ability is an advancement in drilling technology that
    has allowed these units to arrive and remain at different drilling locations,
    making it easier for the oil and gas industry to drill for oil in deeper water. See
    Chief Counsel’s report at 12. This is because “[i]n water depths greater than
    about 1,000 feet, it is increasingly impractical to conduct production operations
    from structures that are supported by the ocean floor, and floating facilities
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    and subsea production systems dominate.” Id. at 7. This economic advantage
    to the oil and gas industry does not mean, however, that the activity of the
    mobile drilling units cannot come under the CSB’s jurisdiction as a stationary
    source if other statutory conditions are met, even though the drilling unit is
    also a vessel. “Once moved onto location, a [dynamically positioned] rig holds
    itself in place above a drilling location using satellite positioning technology
    and directional thrusters.”        Id. at 12-13; see also id. at 26 (“Dynamically
    positioned MODUs utilize dynamic satellite positioning technology connected
    to powerful directional thrusters to maintain themselves in place over a subsea
    wellhead.”). In this case, the Deepwater Horizon was deployed to the Macondo
    well site in February 2010 and had remained in place at the site for
    approximately two months. 1 See id.
    1  The amicus urges that the Deepwater Horizon could not be a stationary source
    because under Coast Guard regulations it is considered to be a vessel “underway” and not
    “on location.” It posits that if a vessel is not “on location” it cannot also be a “stationary
    source.” In support of this argument the amicus relies on a Coast Guard investigation report
    of the Deepwater Horizon incident that discussed the status of the drilling unit. See U.S.
    Coast Guard, Report of Investigation into the Circumstances Surrounding the Explosion, Fire,
    Sinking, and Loss of Eleven Crew Members Aboard the MOBILE OFFSHORE DRILLING
    UNIT DEEPWATER HORIZON in the Gulf of Mexico April 20–22, 2010, at I-10, available at
    https://www.hsdl.org/?view&did=6700 (hereinafter “Coast Guard Report”). The terms “on
    location” and “underway” have specific statutory definitions, however, that do not affect
    whether the vessel may be a “stationary source” for purposes of the Clean Air Act. For
    example, “on location” means merely that the drilling unit is anchored. See 
    46 C.F.R. § 10.107
    (“On location means that a mobile offshore drilling unit is bottom bearing or moored with
    anchors placed in the drilling configuration.”). Because the Deepwater Horizon was a
    dynamically positioned, anchor-less MODU, it could not satisfy the regulatory definition of
    “on location” and was therefore considered to be “underway.” See Coast Guard Report at I-5.
    The Coast Guard Report notes that whether a vessel is “on location” or “underway”
    determines the navigation rules that the vessel must follow, such as for minimum manning
    and operational requirements. See 
    id.
     at I-5. That status alone does not indicate whether
    the vessel is a “stationary source” because a vessel may be “underway” but not “making way.”
    
    Id.
     at I-5-6. The Coast Guard Report specifically recognizes that even though a vessel does
    not meet the statutory definition for being “on location,” it may nevertheless be “essentially
    maintaining a fixed position” through the use of its dynamic positioning system. 
    Id.
     at I-6.
    That was the case with the Deepwater Horizon.
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    The Government urges, and the district court essentially found, that the
    Macondo drilling installation as a whole was a stationary source. We agree.
    At the time of the blowout and explosion the drilling operations occurred at a
    fixed, specific point in the Gulf of Mexico—the Macondo lease site—and the
    Deepwater Horizon was physically connected (though not anchored) at that site
    and maintained a fixed position. The drilling installation as a whole included
    the drilling unit, along with its casing, wellhead, riser, and related apparatus.
    The blowout preventer alone was more than five stories tall and weighed more
    than 300 tons sitting atop the wellhead on the ocean floor. Chief Counsel’s
    Report at 29-30. The Deepwater Horizon was then connected to the wellhead
    by 5000 feet of drill pipe. See In re Oil Spill by the Oil Rig “DEEPWATER
    HORIZON,” 
    808 F. Supp. 2d at 950
    . As noted above, a stationary source
    includes “any buildings, structures, equipment, installations or substance
    emitting stationary activities.” § 7412(r)(2)(C) (emphasis added). The drilling
    installation here satisfied this definition. 2
    Transocean raises a question in its reply brief about the terms of the
    stationary source definition, namely that the source “belong to the same
    industrial group,” be “located on one or more contiguous properties,” be “under
    the control of the same person,” and be something “from which an accidental
    release may occur.” § 7412(r)(2)(C). Transocean has never, in the district
    court, or its initial brief, raised this argument. Because we do not consider
    arguments raised for the first time in a reply brief, we decline to address this
    issue. See DePree v. Saunders, 
    588 F.3d 282
    , 290 (5th Cir. 2009).
    2 Again, that the drilling unit itself was capable of propulsion and could and did use
    its thrusters to counter-act wave activity in order to remain in place over the well does not
    negate the fact that the drilling operation of the Deepwater Horizon was, at the very least, a
    “stationary activity.” See § 7412(r)(2)(C).
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    B.
    Transocean next argues that the CSB lacked jurisdiction to investigate
    the Macondo well incident because Congress specifically denied the CSB
    authority over this type of incident. Its argument is essentially two-fold: first,
    it contends that the Macondo well incident was a marine oil spill, and the Clean
    Air Act specifically precludes the CSB from investigating all marine oil spills;
    second, it contends that even if the statute does not preclude the CSB from
    investigating all marine oil spills, the CSB could not investigate this incident
    because the NTSB had jurisdiction to investigate.
    Transocean’s argument is based on the following provision of the Clean
    Air Act:
    The Board shall coordinate its activities with investigations and
    studies conducted by other agencies of the United States having a
    responsibility to protect public health and safety. The Board shall
    enter into a memorandum of understanding with the National
    Transportation Safety Board to assure coordination of functions
    and to limit duplication of activities which shall designate the
    National Transportation Safety Board as the lead agency for the
    investigation of releases which are transportation related. The
    Board shall not be authorized to investigate marine oil spills, which
    the National Transportation Safety Board is authorized to
    investigate. The Board shall enter into a memorandum of
    understanding with the Occupational Safety and Health
    Administration so as to limit duplication of activities. In no event
    shall the Board forego an investigation where an accidental release
    causes a fatality or serious injury among the general public, or had
    the potential to cause substantial property damage or a number of
    deaths or injuries among the general public.
    § 7412(r)(6)(E) (emphasis added).
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    Transocean argues that the above italicized language shows that the
    CSB is not authorized to investigate marine oil spills and that, instead, the
    NTSB is authorized to investigate all of those incidents. 3
    The district court held that the marine oil spill exclusion did not apply
    to the CSB’s investigation of the Macondo well incident because the CSB was
    not investigating the marine oil spill associated with the disaster but rather
    was investigating the release of gases and the explosion that preceded the
    release of oil. We agree with the district court’s conclusion. 4
    Although Transocean argues that the primary environmental disaster
    resulting from the Macondo well incident was the massive oil spill, it also
    concedes in its brief that the blowout, explosion, and fire, followed by the
    collapse of the Deepwater Horizon, involved the release of airborne gases. That
    release was the triggering of the CSB’s authority to investigate.                     See
    § 7412(r)(2)(A) (authorizing CSB investigations of accidental releases, which
    are defined as “unanticipated emissions[s] . . . into the ambient air”).
    Transocean argues, however, that because the CSB’s jurisdiction always
    depends on a release of gases, the marine oil spill exclusion (1) necessarily
    3  Transocean refers to the emphasized language as the “marine oil spill exclusion.”
    For ease of reference we use the same terminology. We also refer to the clause beginning
    with the word “which” as the “comma-which” clause.
    4 The Coast Guard Report found as follows:
    As the well control incident unfolded, an uncontrolled volume of gas
    flowed up from the wellhead to the MODU and onto the Drill Floor and Main
    Deck. Gas samples collected by Woods Hole Oceanographic Institute on July
    27, 2010 show that the composition of the uncontrolled gas discharged from
    the well was primarily methane (69.9%), with lesser amounts of ethane (6.9%)
    and propane (4.5%). The remainder of the gas consisted of a mixture of various
    weight hydrocarbons. Several minutes after the start of the release of gas from
    the wellhead, a gas cloud within the flammable range formed over large areas
    on several decks. The explosions likely occurred when gas from this cloud
    encountered one or more ignition sources on the Drill Floor or elsewhere on the
    MODU.
    Coast Guard Report, 5-6.
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    contemplates an accidental release that would otherwise be within the CSB’s
    jurisdiction but is merely incidental to a marine event, and (2) expressly
    excludes that event from CSB’s investigatory authority. A contrary conclusion,
    Transocean argues, would render the marine oil spill exclusion surplusage.
    Transocean’s argument assumes, however, that the CSB may not investigate
    any release of gases associated with a marine oil spill. As we explain, we
    disagree.
    Transocean’s argument is textual, and it is primarily based on the
    statutory provision noted above that the CSB “shall not be authorized to
    investigate marine oil spills, which the National Transportation Safety Board
    is authorized to investigate.” See § 7412(r)(6)(E). According to Transocean’s
    reading of that sentence, the statute precludes the CSB from investigating all
    marine oil spills insofar as the NTSB has jurisdiction over those occurrences.
    We agree with the district court, however, that the CSB is not precluded
    from investigating all marine oil spills, but rather only those “spills, which” the
    NTSB may investigate. In other words, the CSB may be precluded from
    investigating those marine-related incidents that the NTSB is authorized to
    investigate. This interpretation of the statute reads “which” to mean “that,”
    and it comports with the statutory scheme as a whole.
    Transocean contends, however, that based on the rules of grammar and
    punctuation the word “which” preceded by a comma creates a nonrestrictive,
    descriptive clause so that the declarative portion of the sentence in
    § 7412(r)(6)(E)—precluding investigation of marine oil spills—is controlling.
    See, e.g., William Strunk, Jr. & E.B. White, The Elements of Style 3-4 (3d ed.
    1979) (hereinafter “Strunk & White”) (explaining that nonrestrictive clauses
    introduced by “which” add nonessential parenthetic information and are set off
    by commas). If we were reading the sentence in isolation we might agree. But
    while the rules of grammar are not irrelevant, we should not “be guided by a
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    single sentence or member of a sentence;” rather, we must “look to the
    provisions of the whole law, and to its object and policy.” U.S. Nat’l Bank of
    Oregon v. Indep. Ins. Agents of Am., Inc., 
    508 U.S. 439
    , 455, 
    113 S. Ct. 2173
    ,
    2182 (1993) (internal quotation marks and citation omitted); cf. United States
    v. Flora, 
    362 U.S. 145
    , 149, 
    80 S. Ct. 630
    , 633 (1960) (noting that a court “does
    not review congressional enactments as a panel of grammarians”).
    We note first that reading the comma-which clause to mean “that” is
    consistent with subsection (E) as a whole and the subsection’s other uses of the
    word “which.” In addition to the comma-which, the statute twice uses the word
    “which” in the previous sentence, reading thusly: “The Board shall enter into
    a memorandum of understanding with the National Transportation Safety
    Board to assure coordination of functions and to limit duplication of activities
    which shall designate the National Transportation Safety Board as the lead
    agency for the investigation of releases which are transportation related.”
    § 7412(r)(6)(E) (emphasis added). The first “which” in this sentence refers to
    the “memorandum of understanding” while the second “which” refers to
    “releases.” It is clear that each “which” in this sentence should be read as
    “that” because the clauses are restrictive, i.e. they give essential meaning
    about the preceding nouns (the “memorandum of understanding” and the
    “releases”). Although Congress is presumed to know the rules of grammar, see
    United States v. Goldenberg, 
    168 U.S. 102
    -03, 
    18 S. Ct. 3
    , 4 (1897), this
    grammatical oversight is understandable, as “[u]sing which for that is perhaps
    the most common blunder with these words.” Bryan A. Garner, Garner’s
    Dictionary of Legal Usage 889 (3d ed. 2011); see also Strunk & White at 59
    (“The use of which for that is common in written and spoken language.”).
    If we read the first two uses of “which” in subsection (E) to mean “that,”
    it would be natural to construe the comma-which to also mean “that.” See
    Powerex Corp. v. Reliant Energy Servs., Inc., 
    551 U.S. 224
    , 232, 
    127 S. Ct. 2411
    ,
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    2417 (2007) (“[I]dentical words and phrases within the same statute should
    normally be given the same meaning.”); see also U.S. Nat’l Bank of Oregon, 
    508 U.S. at 460
    , 
    113 S. Ct. at 2185
    . Of course, the difference between the first two
    uses of the word “which” in subsection (E) and the comma-which clause is the
    presence of the comma, and in isolation the comma could be significant. But
    “a purported plain-meaning analysis based only on punctuation is necessarily
    incomplete and runs the risk of distorting a statute’s true meaning.” 
    Id. at 454
    , 
    113 S. Ct. at 2182
    ; see Costanzo v. Tillinghast, 
    287 U.S. 341
    , 344, 
    53 S. Ct. 152
    , 153 (1932) (“It has often been said that punctuation is not decisive of the
    construction of a statute.”). Construing the words in context, as we must, we
    strive to “interpret the statute ‘as a symmetrical and coherent regulatory
    scheme.’” Brown & Williamson Tobacco Corp., 
    529 U.S. at 133
    , 120 S. Ct. at
    1301 (citation omitted). Here, we must consider the “comma-which” clause
    along with the entire provision as part of “‘a holistic endeavor.’” U.S. Nat’l
    Bank of Oregon, 
    508 U.S. at 455
    , 
    113 S. Ct. at 2182
     (citation omitted). We will
    “‘disregard the punctuation, or repunctuate, if need be, to render the true
    meaning of the statute.’” 
    Id. at 462
    , 
    113 S. Ct. at 2186
     (citation omitted).
    Subsection (E) contemplates that the CSB is not the only government
    agency charged with a public safety mission and may not be the only
    investigating agency; indeed, it expressly directs the CSB to “coordinate its
    activities with investigations and studies by other agencies” with responsibility
    to protect public health and safety. § 7412(r)(6)(E). Even more specifically,
    the statute directs the CSB to “enter into a memorandum of understanding”
    with the NTSB in order to coordinate activities, limit duplication of efforts, and
    designate the NTSB as the lead agency if an accidental release is
    transportation related. Id. We agree with the district court that this provision
    must mean there is a category of marine oil spills that are non-transportation
    related and over which the NTSB lacks exclusive authority. If the comma-
    14
    Case: 13-20243        Document: 00512774082           Page: 15      Date Filed: 09/18/2014
    No. 13-20243
    which clause of the marine oil spill exclusion simply precluded the CSB from
    investigating all marine oil spill incidents there would be no need for the
    requirement that CSB coordinate with the NTSB or other government agencies
    to avoid duplication of efforts.           In context, the structure of the statute,
    including the prior uses of the word “which,” indicates an intent that the
    comma-which clause was not meant to be non-restrictive.
    Moreover, the statute expressly directs the CSB to investigate any time
    an accidental release causes a fatality or serious injury to the general public.
    See id. (“In no event shall the Board forego an investigation where an accidental
    release causes a fatality or serious injury among the general public, or had the
    potential to cause substantial property damage or a number of deaths or
    injuries among the general public.” (emphasis added)). This must mean that
    for especially serious incidents involving either grave injury or the risk of
    injury, including marine oil spills, the CSB could have concurrent investigative
    authority with other agencies. 5 And again, the CSB would be required to
    coordinate its efforts with any other agencies. This provision adds further
    support to the conclusion that the marine oil spill exclusion is not the all-
    encompassing prohibition that Transocean urges.
    We believe that looking at the full text of the statute, rather than one
    isolated clause, along with the statute’s structure and its public safety purpose
    shows that the comma-which clause was not intended to preclude the CSB from
    investigating all incidents involving marine oil spills. See U.S. Nat’l Bank of
    5  Transocean argues that this provision of subsection (E) is inapplicable here because
    the Macondo well incident was incapable of causing death or injury to members of the general
    public insofar as the disaster occurred fifty miles off the coast of the United States. First,
    this argument is inapposite to whether the CSB is precluded from investigating all marine
    oil spills in the first place. Second, the offshore location of the disaster does not preclude the
    potential for injury to persons on shore since it cannot be denied that airborne hazardous
    substances could migrate and cause injury on land.
    15
    Case: 13-20243    Document: 00512774082        Page: 16   Date Filed: 09/18/2014
    No. 13-20243
    Oregon, 
    508 U.S. at 455
    , 
    113 S. Ct. at 2182
     (eschewing isolated words or
    sentences in favor of “a statute’s full text, language as well as punctuation,
    structure, and subject matter”). This reading of the statute best comports with
    the overall regulatory scheme. See Brown & Williamson Tobacco Corp., 
    529 U.S. at 133
    , 120 S. Ct. at 1301; see also U.S. Nat’l Bank of Oregon, 
    508 U.S. at
    461 n.10, 
    113 S. Ct. at
    2186 n.10 (searching for “the best reading of the Act,
    despite the punctuation marks”). We conclude, therefore, that the statute did
    not categorically preclude the CSB from investigating all incidents that happen
    to include a marine oil spill.
    Transocean contends that even if the CSB could otherwise investigate
    the incident at the Macondo well, it was precluded from doing so in this case
    because the NTSB was authorized to investigate. Transocean relies solely on
    
    49 U.S.C. § 1131
    (a)(1)(F), which grants the NTSB authority to investigate,
    inter alia, “catastrophic” accidents that are “related to the transportation of
    individuals or property.”        It asserts that the Macondo well incident was
    catastrophic and that the disaster was related to transportation because the
    Deepwater Horizon was a vessel in navigation.
    However, when the blowout occurred on April 20, 2010, the Deepwater
    Horizon was dynamically positioned and physically attached to the seabed,
    having been on site and engaged in drilling operations for a number of months.
    The district court held that this fact was crucial to the determination that the
    incident was not transportation related.           Transocean cites no contrary
    authority. Merely because a disaster involves a vessel does not mean that the
    disaster was necessarily related to transportation. Although the drilling unit
    may have been capable of transportation, it was not involved in transporting
    either individuals or property at the time of the blowout, explosion, and fire.
    See § 1131(a)(1)(F). In other words, although the Deepwater Horizon possessed
    characteristics associated with transportation, those characteristics played no
    16
    Case: 13-20243    Document: 00512774082     Page: 17   Date Filed: 09/18/2014
    No. 13-20243
    role in the disaster, and the accident was not related to transportation. We
    agree with the district court that § 1131(a)(1)(F) is inapplicable and that the
    NTSB lacked jurisdiction to investigate the incident under that provision,
    meaning that the CSB was authorized to act.
    IV.
    For the reasons stated above, we conclude that the CSB had jurisdiction
    to investigate the incident at the Macondo well and to issue the administrative
    subpoenas.    The district court’s judgment ordering enforcement of the
    subpoenas is therefore AFFIRMED.
    17
    Case: 13-20243         Document: 00512774082         Page: 18     Date Filed: 09/18/2014
    No. 13-20243
    JONES, Circuit Judge, dissenting.
    I respectfully disagree with the majority opinion, which assists the
    United States Chemical Safety Board (“CSB”) in expanding its jurisdiction into
    novel territory disallowed by Congress. This is the first time, in twenty years
    after CSB was ordained, that the agency has sought to investigate in
    connection with an offshore oil spill. 1 The majority’s interpretation of the
    Clean Air Act disregards the plain meaning of words and grammar and the
    most fundamental maritime concept, which is the definition of a vessel. To
    summarize my view: the Mobile Offshore Drilling Unit Deepwater Horizon
    was a vessel, not a “stationary source” pursuant to 
    42 U.S.C. § 7412
    (r)(2)(C),
    and the Macondo Well blowout caused a “marine oil spill,” 
    42 U.S.C. § 7412
    (r)(6)(E), which excluded the blowout from CSB jurisdiction either in toto
    or because the NTSB was empowered to investigate.
    Because the majority opinion aptly describes the background of this
    controversy, only a bit need be repeated here.                     Transocean objects to
    administrative subpoenas served by CSB when the agency instituted an
    investigation following the Deepwater Horizon oil spill disaster. The standard
    for challenging an administrative subpoena is strict: courts may only interfere
    with the process in a limited number of circumstances, one of which arises
    when the agency plainly lacks jurisdiction. See Burlington N. R. Co. v. Office
    of Inspector Gen., R.R. Ret. Bd., 
    983 F.2d 631
    , 638 (5th Cir. 1993); see also
    United States v. Powell, 
    379 U.S. 48
    , 57–58, 
    85 S. Ct. 248
    , 255 (1964). CSB
    was created as a Clean Air Act counterpart to the National Traffic Safety Board
    (“NTSB”) and charged with investigating unanticipated releases of hazardous
    substances into the ambient air from “stationary sources.”                      
    42 U.S.C. § 7412
    (r)(2)(C) (defining the term “accidental release” found in 42 U.S.C.
    1   Inside OSHA, Vol. 17, No. 13, at 6 (June 29, 2010).
    18
    Case: 13-20243      Document: 00512774082     Page: 19   Date Filed: 09/18/2014
    No. 13-20243
    § 7412(r)(6)(C)(i)). The term “stationary sources,” includes “any buildings,
    structures, equipment, installations or substance emitting stationary
    activities. . . ."   
    42 U.S.C. § 7412
    (r)(2)(C).   The Board may follow up an
    investigation by recommending regulatory measures to avert future releases
    into the air. NTSB, in contrast, investigates “transportation-related” aviation,
    highway, rail, marine or pipeline accidents and also makes regulatory
    recommendations to improve safety. 
    49 U.S.C. § 1131
    (a)(1)(F). Not only CSB
    and NTSB, but numerous other agencies either routinely or at special request
    investigate accidents with significant public impact. As a result, the statute
    that created CSB requires this agency to cooperate with or take a second seat
    to such agencies:
    The Board shall coordinate its activities with investigations
    and studies conducted by other agencies of the United States
    having a responsibility to protect public health and safety. The
    Board shall enter into a memorandum of understanding with the
    National Transportation Safety Board to assure coordination of
    functions and to limit duplication of activities which shall
    designate the National Transportation Safety Board as the lead
    agency for the investigation of releases which are transportation
    related. The Board shall not be authorized to investigate marine
    oil spills, which the National Transportation Safety Board is
    authorized to investigate. The Board shall enter into a
    memorandum of understanding with the Occupational Safety and
    Health Administration so as to limit duplication of activities. In no
    event shall the Board forego an investigation where an accidental
    release causes a fatality or serious injury among the general
    public, or had the potential to cause substantial property damage
    or a number of deaths or injuries among the general public.
    
    42 U.S.C. § 7412
    (r)(6)(E).
    Under this provision, if the Deepwater Horizon was not a stationary
    source, CSB lacked the authority to investigate. Likewise, if the disaster was
    a marine oil spill, or by even the majority’s construction a marine oil spill that
    19
    Case: 13-20243     Document: 00512774082     Page: 20   Date Filed: 09/18/2014
    No. 13-20243
    NTSB was authorized to investigate, CSB lacks authority. I will discuss each
    of these limits on CSB’s authority in turn.
    1. Can a vessel be a “stationary source”?
    This question seems to answer itself. A “vessel,” as defined in federal
    law, is a device capable of providing transportation on water. 
    1 U.S.C. § 3
    ;
    Stewart v. Dutra Construction Co., 
    543 U.S. 481
    , 495, 
    125 S. Ct. 1118
    , 1128
    (2005). “Stationary” means “fixed in a station, course or mode; unchanging,
    stable, static.” Webster's Third New International Dictionary 2229 (1986). Not
    only does “stationary” modify all of the following terms, but the following
    illustrations of “stationary sources” are inherently fixed and immobile
    (“buildings, structures, equipment, installations . . .”). A vessel capable of
    transportation is not comparable to these illustrated sources and cannot be a
    stationary source of emissions.     To so conclude erases the line between
    stationary and mobile sources.
    But the majority determines otherwise. First, the majority opinion
    acknowledges that the Deepwater Horizon is a vessel according to Coast Guard
    regulations, Supreme Court authority, longstanding case law in this circuit,
    and multiple decisions relating to this oil spill disaster. However, the majority
    contends, what is good law for maritime purposes does not govern the Clean
    Air Act’s statutory definition. Alternatively, the majority holds, the Deepwater
    Horizon was in fact “stationary” when the blowout and oil spill occurred,
    because its dynamic positioning devices kept the unit essentially in place
    without anchors securing it to the ocean floor while it engaged in drilling
    operations. Finally, the majority posits that the “Macondo drilling installation
    as a whole,” allegedly encompassing the drill string, riser, blowout preventer,
    wellhead and casing, all of which stretch over a mile down and into the Outer
    Continental Shelf seabed, maintained a stationary position.
    20
    Case: 13-20243       Document: 00512774082          Page: 21     Date Filed: 09/18/2014
    No. 13-20243
    The majority’s fundamental error lies in distorting “stationary” from its
    ordinary meaning, as required by the tools of statutory interpretation, Castro
    v. Collecto, Inc., 
    634 F.3d 779
    , 786 (5th Cir. 2011). The Deepwater Horizon
    was a “vessel” from a common sense standpoint.                     Technically, it was a
    “dynamically-positioned semi-submersible drilling vessel” that was afloat and
    under movement at the time of the blowout. See In re Oil Spill by the Oil Rig
    Deepwater Horizon in the Gulf of Mexico, on April 20, 2010, 
    808 F. Supp. 2d 943
    , 950 (E.D. La. 2011), aff'd sub nom. In re Deepwater Horizon, 
    745 F.3d 157
    (5th Cir. 2014).      It navigated, transported personnel and equipment, and
    continued navigating in order to hold its position in the sea against currents
    and waves. That it was able to employ advanced technology to accomplish its
    purpose, rather than sails or rudders, does not detract from its status as a
    vessel; hence, its status as a “mobile” offshore drilling unit. At all times, it had
    a navigational crew in addition to a drilling crew. The issue here is not so
    much whether the Clean Air Act definition must slavishly follow the course of
    maritime law, but also whether calling this “mobile” offshore drilling a “vessel”
    conflicts with the ordinary meaning of a “stationary source.”
    Virtually every opinion of this court relating to the Deepwater Horizon
    oil spill disaster has referred to the MODU as a “vessel,” 2 and in so doing we
    have followed a path charted in this court for decades. See, e.g., Trico Marine
    Operators, Inc. v. Falcon Drilling Co., 
    116 F.3d 159
    , 161 (5th Cir. 1997);
    Dougherty v. Santa Fe Marine, Inc., 
    698 F.2d 232
    , 234 (5th Cir. 1983); Offshore
    Co. v. Robison, 
    266 F.2d 769
    , 779 (5th Cir. 1959). Our decisions reflect how
    2See, e.g., In re Deepwater Horizon, 
    753 F.3d 570
    , 571 (5th Cir. 2014); In re Deepwater
    Horizon, 
    745 F.3d 157
    , 164 (5th Cir. 2014); In re Deepwater Horizon, 
    739 F.3d 790
    , 796 (5th
    Cir. 2014) (labeling the MODU as a vessel).
    21
    Case: 13-20243     Document: 00512774082      Page: 22   Date Filed: 09/18/2014
    No. 13-20243
    maritime activities have evolved in the last fifty years to include new and ever-
    more-sophisticated watercraft. The Supreme Court has also defined “vessels”
    expansively as “any watercraft practically capable of maritime transportation.”
    Stewart v. Dutra Constr. Co., 
    543 U.S. 481
    , 497, 
    125 S. Ct. 1118
    , 1128 (2005).
    Also compelling is the Coast Guard’s responsibility for regulating mobile
    offshore drilling units, which recently led it to conclude that if anything, their
    status as vessels should be fortified. Memorandum from S.D. Poulin, U.S.
    Coast Guard, to CG-5, Potential Legal Issues Associated With Vessels
    Employing Dynamic Positioning Systems 10 (Feb. 11, 2011). Why, in the face
    of ordinary meaning and this body of consistent authority, should a court be
    able to hold that the Deepwater Horizon, although a “vessel,” was a “stationary
    source”? This is like holding a pig is a pony. The language of the statute is
    broad but it isn’t limitless. Either “stationary” means something related to
    immobility, or judges are making up a new meaning.
    The majority’s other reasons for holding that the Deepwater Horizon was
    a “stationary source” also defy common sense. The majority’s description of
    the sophisticated dynamic positioning system used by Mobile Offshore Drilling
    Units like the Deepwater Horizon is flawed and, worse, leads to the possibility
    that CSB jurisdiction will turn on fact-specific determinations of “stationary”
    versus “mobile” sources.    Factually, it is true that the thrusters operated by
    the MODU’s navigational crew kept the unit positioned substantially over the
    wellhead, but the unit continues at all times to move with the wave motions.
    Essentially, the thrusters permit the unit to tread water. Anyone treading
    water, however, is constantly in motion, and so was the Deepwater Horizon.
    Likewise, a helicopter may hover in place over the ground, but it is always in
    motion, and I suppose even CSB would not contend it is a “stationary source.”
    Even more unfortunate is the resort to fact-specific reasoning to
    determine that this vessel is a “stationary source.” Since the statute draws a
    22
    Case: 13-20243       Document: 00512774082        Page: 23     Date Filed: 09/18/2014
    No. 13-20243
    dichotomy between the CSB’s responsibility for “stationary source” accidental
    air releases and NTSB’s jurisdiction over “transportation-related” disasters,
    the CSB’s aggressive attempt to blur the dichotomy is at odds with the statute
    itself. (As will be seen, CSB is horning into the primary jurisdiction of NTSB
    by urging this court to narrow NTSB’s scope as well.) Of course, the statute
    contemplates splitting duties between NTSB and CSB in appropriate cases,
    and in such cases requiring CSB to yield to NTSB, but one can easily envision
    overlaps without CSB’s having to mutilate the definition of “stationary.” For
    instance, if a chemical tank exploded at a rail yard and emitted hazardous
    fumes, there could be a question whether the cause was transportation-related
    or due to a stationary source nearby. Similarly, toxic substances or fuel used
    in connection with aircraft and aircraft maintenance might ignite at an
    aviation center, emitting hazardous air pollutants.                The cause of either
    accident could be “stationary” or “transportation-related.” In the Deepwater
    Horizon disaster, however, CSB contends that the vessel itself was the
    “stationary source” because it was dynamically positioned.               Henceforth, the
    same argument could result in fully overlapping CSB/NTSB authority
    whenever a vehicle, aircraft, or vessel happens to be temporarily moored at the
    time of an unanticipated toxic air emission.
    The majority’s final rationale for calling this mobile offshore drilling unit
    a “stationary source” is to embed it in an “installation as a whole”
    encompassing the Macondo well and the well’s casing 3 and wellhead, 4 which
    3  Casing, SCHLUMBERGER OILFIELD GLOSSARY, (last visited Sept. 16, 2014),
    http://www.glossary.oilfield.slb.com/en/Terms/c/casing.aspx (“Large-diameter pipe lowered
    into an openhole and cemented in place.”).
    4 Wellhead, SCHLUMBERGER OILFIELD GLOSSARY, (last visited Sept. 16, 2014),
    http://www.glossary.oilfield.slb.com/en/Terms/w/wellhead.aspx (“The system of spools, valves
    and assorted adapters that provide pressure control of a production well.”).
    23
    Case: 13-20243       Document: 00512774082         Page: 24     Date Filed: 09/18/2014
    No. 13-20243
    are located underneath or at the level of the seabed. This bottom-up logic is
    erroneous for two reasons.
    First, common sense tells us that the five thousand feet of drill string,
    plus riser and blowout preventer leading from the MODU to the well hardly
    created a stationary island 50 miles off the United States coast in the Gulf of
    Mexico. The MODU Deepwater Horizon and its appurtenances are connected
    to the seabed. 5 But it is quite inconsistent to say that the “installation” is
    stationary when the only reason for its being stationary is that the vessel uses
    dynamic positioning thrusters and is constantly in motion to maintain stability
    over the wellhead.       Broadening the term “installation” to denominate the
    Macondo well and the Deepwater Horizon a “stationary source” is nothing
    more than rhetorical legerdemain designed to obfuscate the limits on CSB’s
    jurisdiction.
    Second, both statutory law and well settled case law have distinguished
    between fixed and mobile drilling platforms and offshore devices for decades.
    The Outer Continental Shelf Lands Act distinguishes between “artificial
    islands” and vessels in order to demarcate between the application of federal
    or state law and admiralty law.            See 
    43 U.S.C. § 1333
    (1) (distinguishing
    between artificial islands subject to the choice of law provisions of
    43 § 1333(2)(A) and vessels not subject to such provisions); see also Herb's
    Welding, Inc. v. Gray, 
    470 U.S. 414
    , 421–23, 
    105 S. Ct. 1421
    , 1426–27 (1985)
    (outlining the division between artificial islands subject to “borrowed state
    5 The majority’s bottom-up logic is hard to square with a recent opinion of this Court
    that referred to the blowout preventer and riser as “appurtenances” of the vessel Deepwater
    Horizon, and the vessel and its appurtenances as separate from the well. In re Deepwater
    Horizon, 
    753 F.3d 570
    , 571 (5th Cir. 2014); Jerome B. Grubart, Inc. v. Great Lakes Dredge &
    Dock Co., 
    513 U.S. 527
    , 535, 
    115 S. Ct. 1043
    , 1049 (1995) ([M]aritime law … ordinarily treats
    an “appurtenance” attached to a vessel in navigable waters as part of the vessel itself.”).
    24
    Case: 13-20243     Document: 00512774082     Page: 25   Date Filed: 09/18/2014
    No. 13-20243
    law” and other areas subject to maritime law). Artificial islands are drilling or
    production platforms attached to the seabed in some way and thus fully
    immobile, while other special purpose structures “such as jack-up rigs,
    submersible drilling barges, derrick barges, spud barges, and others are
    vessels as a matter of law.”    Manuel v. P.A.W. Drilling & Well Service, Inc.,
    
    135 F.3d 344
    , 347 (5th Cir. 1998).      It is bedrock that “[w]e assume that
    Congress is aware of existing law when it passes legislation.” Miles v. Apex
    Marine Corp., 
    498 U.S. 19
    , 32 (1990); see also Goodyear Atomic Corp. v. Miller,
    
    486 U.S. 174
    , 184–85, 
    108 S. Ct. 1704
    , 1712 (1988) (“We generally presume
    that Congress is knowledgeable about existing law pertinent to the legislation
    it enacts."). Setting aside the “marine oil spill exclusion” discussed next, the
    CSB’s jurisdiction over artificial islands as “stationary” sources fits
    comfortably within the OCSLA dichotomy and background law.                Just as
    clearly, characterizing the MODU Deepwater Horizon with or without the
    Macondo well as “stationary” does not.           The majority’s deviation from
    background law violates the ordinary interpretive presumption as well as the
    facts.
    2. Can the "marine oil spill exclusion" be excluded?
    It is unnecessary to wade into the parties’ “comma, which” dispute to
    reach a sensible interpretation of 
    42 U.S.C. § 7412
    (r)(6)(C)(i), which excludes
    marine oil spills from CSB’s investigative authority. This provision as a whole
    expresses Congress’s recognition that other agencies have regulatory
    jurisdiction over hazardous releases into the ambient air. Consequently, CSB
    has to cooperate and coordinate with such agencies in furtherance of public
    health and safety. Foreseeing significant potential overlaps, Congress paid
    particular attention to the interrelation of CSB with two agencies: the OSHA
    and NTSB. NTSB, relevant here, is deemed the lead agency for releases
    “which” are “transportation related.” We know from the Supreme Court that
    25
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    “related-to” language is enabling in the broadest sense. Ingersoll-Rand Co. v.
    McClendon, 
    498 U.S. 133
    , 138–39, 
    111 S. Ct. 478
    , 482–83 (1990) (discussing
    the breadth of the “related-to” pre-emption language in § 514(a) of ERISA).
    The CSB, moreover, “shall not be authorized to investigate marine oil spills,
    which the National Transportation Safety Board is authorized to investigate.”
    Nevertheless, “[i]n no event shall the [CSB] forego an investigation where an
    accidental release causes a fatality or serious injury among the general public
    or had the potential to cause substantial property damage or a number of
    deaths or injuries among the general public.” I part company with the majority
    on the applicability of the “marine oil spill exclusion” and their interpretation
    of the “danger to the public” catchall language.
    Taking the “marine oil spill exclusion” first, even if this language is read
    holistically and narrowly to exclude CSB from only those marine oil spills
    “that” the NTSB may investigate, this marine oil spill was “related to”
    transportation through the movement of hydrocarbons from the well through
    the drill string to the Deepwater Horizon 6 and by virtue of the vessel’s constant
    movement. On the face of the provision, where NTSB was authorized to
    investigate, CSB must recede. Curiously, however, to expand CSB jurisdiction,
    at the expense of the NTSB, the majority accepted two of CSB’s propositions:
    this oil spill disaster, the largest in American history, was not within the
    “marine oil spill exclusion,” and even if it was, NTSB lacked jurisdiction. These
    arguments are wrong. The first one would eviscerate the “marine oil spill
    exclusion” completely. The second erroneously limits NTSB’s authority.
    Holding that the “marine oil spill exclusion” does not apply if hazardous
    substances were incidentally released into the air during a “marine oil spill”
    6   Recall that NTSB is also charged to investigate pipeline disasters.
    26
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    turns the exclusion on its head and renders it a nullity. 7 Virtually any offshore
    crude oil spill involves the emission of fumes, because petroleum produced from
    wells is “oil,” more technically, "[a] complex mixture of naturally hydrocarbon
    compounds found in rock. . . . [T]he term is generally used to refer to liquid
    crude oil. Impurities, such as sulfur, oxygen and nitrogen are common in
    petroleum.”      Petroleum, SCHLUMBERGER OILFIELD GLOSSARY, (last visited
    Sept. 16, 2014), www.glossary.oilfield.slb.com/en/Terms/p/petroleum.aspx.
    The lighter hydrocarbons and impurities in crude oil readily evaporate into the
    air; as we all know, there is no smoking at gas pumps because of the volatility
    of hydrocarbons in “oil.” CSB’s attempt to separate these mixed hydrocarbons
    temporally from the oil spill disaster, by purporting to focus its investigation
    on the emission of fumes that ignited and exploded at the platform, is
    unrealistic. How unrealistic is confirmed by the scope of the agency’s subpoena
    at issue here: CSB called for all of the documents that Transocean turned over
    to all of the other investigating agencies concerning the blowout, explosion and
    oil spill. Why? Because the liquid and gaseous hydrocarbons all spewed from
    the well due to the same errors during the drilling process. The investigation
    cannot be limited to ambient air releases apart from the events that triggered
    the marine oil spill. This position is factually unsupportable.
    Equally untenable is the holding that NTSB lacked authority to
    investigate this disaster.        NTSB has jurisdiction over “any other accident
    related to the transportation of individuals or property when the [NTSB]
    decides--
    (i) the accident is catastrophic;
    (ii) the accident involves problems of a recurring
    7 It is an established principle of statutory interpretation that “[w]here possible, every
    word in a statute should be given meaning.” G.M. Trading Corp. v. C.I.R., 
    121 F.3d 977
    , 981
    (5th Cir. 1997).
    27
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    character; or
    (iii) the investigation of the accident would carry
    out this chapter.
    
    49 U.S.C. § 1131
    (a)(1)(F). The majority fall back on their faulty conclusion that
    the oil spill disaster was not “transportation related.” 8              Remarkably, the
    majority must conclude that “[m]erely because a disaster involves a vessel does
    not mean that the disaster was necessarily related to transportation.” I have
    already explained why the MODU’s status as a vessel is dispositive of the
    “stationary source” argument; the factual and legal points made there apply
    even more clearly to this argument. The logical implication of the majority’s
    interpretation forbids NTSB to operate in its area of expertise when certain
    catastrophic disasters involve a temporarily immobile vehicle, airplane, train,
    vessel or pipeline activity. The settled legal interpretation of "related" forbids
    this artificial constraint.
    Finally, the majority erroneously relies on CSB’s catchall investigative
    power over fatalities, serious injuries or property damages to “the general
    public.”   
    42 U.S.C. § 7412
    (r)(6)(E).          The Deepwater Horizon’s crew were
    specialized oilfield or marine employees covered by OSHA, not “the general
    public.”    To be sure, this catchall is an empowering provision, just as
    Section 1131(a)(1)(F) is empowering to the NTSB. Unlike the NTSB provision,
    which empowers transportation “related” investigations, CSB’s provision
    covers actual or potential injuries, fatalities or property damage to “the general
    public.” On the facts of this case, the provision is clearly inapplicable.             CSB
    posits its jurisdiction only over the explosion on the MODU Deepwater Horizon
    8The present case involves an accident on the Outer Continental Shelf and is therefore
    unlike NTSB v. Carnival Cruise Lines, Inc., 
    723 F. Supp. 1488
    , 1493 (S.D. Fla. 1989), which
    dealt with an “extraterritorial investigation” outside of U.S. territory. Since 
    43 U.S.C. § 1331
    (a) makes clear that the Outer Continental Shelf is under U.S. law, any investigation
    would not be extraterritorial.
    28
    Case: 13-20243     Document: 00512774082       Page: 29    Date Filed: 09/18/2014
    No. 13-20243
    that was occasioned by the release of volatile hydrocarbons from the well. The
    Macondo well was located 50 miles offshore of Louisiana. No one has ever
    claimed that injury occurred to “the general public” onshore from releases into
    the ambient air. The term “public” is defined to mean “of, relating to, or
    affecting the people as an organized community.”             Webster’s Third New
    International Dictionary 1836 (1986); see also Black’s Law Dictionary 1264
    (8th ed. 1999) (defining public as “[r]elating or belonging to an entire
    community”).    The workers who tragically lost their lives in the vessel’s
    explosion are not, under this definition, “the general public.” Congress could
    have easily described CSB’s catchall jurisdiction by referring to “individuals”
    or “any person,” but it chose a different term.
    Conclusion
    This case strictly and properly concerns an agency’s statutory authority
    to issue subpoenas and conduct an investigation.              The much broader
    ramifications of the decision should not, however, be overlooked. First, when
    Congress has delineated agency authority against clear background principles
    and with easily defined terms, the agency itself should not play havoc with the
    statute to expand its authority; an agency has a duty to follow its mandate but
    go no further. For the sake of maintaining limited government under the rule
    of law, courts must be vigilant to sanction improper administrative overreach.
    See, e.g., Util. Air Regulatory Grp. v. E.P.A., 
    134 S. Ct. 2427
    , 2449 (2014)
    (holding that the EPA exceeded its statutory authority). Second, contrary to
    some fears expressed about the consequences of holding CSB unable to
    investigate the Deepwater Horizon disaster, there were at least seventeen
    investigations, including major reports by a Presidential Commission and the
    Coast Guard. See Exec. Order No. 13,543, 
    75 Fed. Reg. 29,397
     (May 21, 2010)
    (establishing the National Commission on the BP Deepwater Horizon Oil Spill
    and Offshore Drilling). The Coast Guard, in fact, was required to “make an
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    Case: 13-20243     Document: 00512774082     Page: 30   Date Filed: 09/18/2014
    No. 13-20243
    investigation and public report on each major fire and each major oil spillage
    occurring as a result of” exploration, development and production of minerals
    from the OCS.       
    43 U.S.C. § 1348
    (d)(1).     There is no dearth of proper
    investigation to protect public safety. Third, as a result of being deemed by
    this opinion “stationary sources,” nearly all non-standard offshore vessels
    involved in oil and gas production on the OCS will become subject to Clean Air
    Act regulation and reports in addition to “all of the regulatory requirements of
    ‘traditional’ vessels” imposed by the Coast Guard.             See 
    42 U.S.C. § 7412
    (r)(7)(B)(iii); Memorandum from S.D. Poulin, U.S. Coast Guard, to CG-
    5, Potential Legal Issues Associated With Vessels Employing Dynamic
    Positioning Systems 10 (Feb. 11, 2011).
    For all these reasons, I respectfully dissent.
    30