Genereux v. American Beryllia Corp. ( 2009 )


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  •             United States Court of Appeals
    For the First Circuit
    No. 07-2676
    SUZANNE GENEREUX, Individually and as Parent and Natural
    Guardian to minor children A.G. and K.G.; BARRY
    GENEREUX, Individually and as Parent and Natural
    Guardian to minor children A.G. and K.G.,
    Plaintiffs, Appellants,
    v.
    AMERICAN BERYLLIA CORP.; BRUSH WELLMAN, INC.; HARDRIC
    LABORATORIES, INC.,
    Defendants, Appellees,
    BRUSH WELLMAN CERAMICS, INC.; BRUSH WELLMAN CERAMIC
    PRODUCTS, INC.; KYOCERA AMERICA, INC.; KYOCERA
    INDUSTRIAL CERAMICS CORP.; RAYTHEON COMPANY,
    Defendants.
    APPEAL FROM THE UNITED STATES DISTRICT COURT
    FOR THE DISTRICT OF MASSACHUSETTS
    [Hon. Joseph L. Tauro, U.S. District Judge]
    Before
    Torruella, Baldock*, and Lipez, Circuit Judges.
    Ruben Honik, with whom Stephan Matanovic, Golomb & Honik,
    P.C., Leo V. Boyle, and Meehan, Boyle, Black and Bogdanow, P.C.
    were on brief, for appellants.
    *      Of the Tenth Circuit, sitting by designation.
    William F. Ahern, Jr., with whom Jeremy Y. Weltman and Clark,
    Hunt & Embry were on brief, for appellee American Beryllia Corp.
    Robert M.A. Nadeau, with whom Nadeau Law, LLC was on brief,
    for appellee Hardric Laboratories, Inc.
    Jeffery D. Ubersax, with whom Robert S. Faxon, Jones Day, Alan
    M. Spiro, and Edwards Angell Palmer & Dodge LLP were on brief, for
    appellee Brush Wellman, Inc.
    July 29, 2009
    LIPEZ, Circuit Judge.            Suzanne Genereux, her husband
    Barry Genereux, and their children brought suit against various
    manufacturers of beryllium products, alleging that their products
    caused injury to Suzanne Genereux when she came into contact with
    them at her workplace.     The complaint asserted negligence, breach
    of warranty, failure to warn, violation of Massachusetts General
    Laws chapter 93A, and other claims.            The district court granted
    summary judgment for the defendants on all of the plaintiffs'
    claims, concluding that the common-law claims were time-barred and
    that the defendants were relieved of liability under chapter 93A by
    Massachusetts's "sophisticated user" defense. Plaintiffs appealed.
    After a careful review of the record, we conclude that a
    reasonable jury could find that the plaintiffs' common-law claims
    were timely and that the sophisticated user defense did not relieve
    the defendants of liability.      We therefore vacate and remand.
    I.
    On appeal from summary judgment, we take the facts in the
    light   most   favorable   to   the    non-moving    party   and   draw   all
    reasonable inferences in its favor.          CMI Capital Mkt. Inv., LLC v.
    González-Toro, 
    520 F.3d 58
    , 61 (1st Cir. 2008).
    A. The Raytheon Company and Beryllium
    Suzanne Genereux ("Genereux") worked for Raytheon Company
    ("Raytheon"), a major defense contractor, from 1982 to 1990.              She
    was employed at the company's Waltham, Massachusetts plant, where
    -3-
    its Microwave and Power Tube Division was then headquartered.
    Genereux spent seven years in the plant's Backward Wave Oscillator
    Lab and one year as a quality assurance technician.1                 In the
    Backward Wave Oscillator Lab, Genereux assembled components, known
    as "subassemblies," for incorporation into radar tubes.            She spent
    most of her time working on two subassemblies: the "ARCO window"
    and the "Tall Man."      Both subassemblies contained beryllium.
    Beryllium is a silver-grey non-magnetic metal that is
    exceptionally light, stiff, and able to disperse heat rapidly.
    When alloyed with other metals, such as copper, beryllium tends to
    pass on its properties to the alloy.             This is also true of
    beryllium   oxide   ceramics,    or   "beryllia,"   which    can   withstand
    extreme temperatures and rapidly disperse heat.             These features
    make beryllium ideal for many specialized applications, including
    x-ray windows, transistors, jet brake pads, ceramic jet engine
    blades and rocket covers, nuclear reactors, and nuclear weapons.
    Unfortunately, however, beryllium dust and fumes are hazardous to
    human    health.    In   some   individuals,   inhaling     beryllium   dust
    triggers an immune response, causing inflammation and the formation
    of granulomas in the lung tissue.           This disease is known as
    "chronic beryllium disease," and it gives rise to a number of
    1
    Genereux also     worked in quality assurance at Raytheon's
    Northborough plant, but     only for a short time. She did not work
    with beryllium in this      position.   She also worked briefly as a
    production coil winder,     which did not involve beryllium.
    -4-
    symptoms, such as coughing, shortness of breath, fatigue, weight
    loss, fevers, and night sweats.          The beryllium industry has long
    known of the disease and implemented various hygienic controls to
    prevent it.
    Brush Wellman, Inc. ("Brush"), American Beryllia Corp.
    ("American Beryllia"), and Hardric Laboratories, Inc. ("Hardric")
    manufacture beryllium ceramic and beryllium alloy parts and supply
    these parts for use in some of the applications discussed above.
    Brush is the largest domestic producer of beryllium-containing
    products,     including    beryllium    oxide     ceramics,    and    sometimes
    supplies beryllium to other beryllium manufacturers for further
    processing. Brush is also one of the oldest producers of beryllium
    products; it has been in existence since 1931 (incorporated as
    "Brush Beryllium Company"), and its facilities hosted one of the
    earliest major studies of beryllium exposure and beryllium disease,
    carried out in the late 1940's by the United States Atomic Energy
    Commission.      American Beryllia was incorporated in 2002 after
    purchasing the assets of General Ceramics, which had manufactured
    beryllium products since the 1950's, initially under the name
    National    Beryllia    Corporation.         General   Ceramics,     Brush,   and
    Hardric manufactured beryllium parts that Genereux worked with in
    the Waltham Backward Wave Oscillator Lab.2
    2
    Appellees     dispute   this      point.     See   infra    section
    III(C)(2).
    -5-
    Raytheon   used   both   beryllium    ceramics      and   beryllium
    metals in the Backward Wave Oscillator Lab.              Blueprints used by
    Genereux identified several subassembly parts containing beryllium.
    For example, the ARCO window contained two beryllium parts: a
    beryllium copper sleeve and a cylindrical beryllium oxide ceramic.
    The Tall Man contained a rectangular beryllium oxide ceramic.
    Genereux performed a number of operations on these parts that
    produced respirable dust.         She filed, sanded, smoothed (using a
    Dremel rotary tool), and polished beryllium copper and possibly
    other beryllium metals.3       These processes removed small amounts of
    material from the metal, some of which were so small that they
    would become airborne and remain suspended in the air as respirable
    dust.
    Genereux   also    spent    considerable     time    sandblasting
    various beryllium ceramics -- between two hours a day and eight
    hours a day, towards the end of the month or when a shipping
    deadline approached.4     She used a pencil grit blaster, which worked
    by expelling grit from a nozzle controlled by the operator.                   This
    process     removed   small    amounts    of   ceramic   material      from    the
    3
    Appellees dispute that Genereux             polished      beryllium
    metals.     See infra section III(B)(2).
    4
    Genereux was sometimes asked to sandblast beryllium oxide
    ceramics in addition to those contained in the ARCO window and the
    Tall Man subassemblies.
    -6-
    beryllia.     Although sandblasting took place under a hood,5 the
    ceramic material and some of the grit would become airborne,
    producing white dust that settled on Genereux's clothes and shoes.
    In addition to these activities, Genereux was also designated to
    handle, store, and track all the beryllium parts used in the
    Backward Wave Oscillator Lab.6
    Raytheon took steps to control employees' exposure to
    beryllium dust, and Brush, along with other beryllium producers,
    provided    Raytheon   with   information   about    appropriate   hygienic
    controls and exposure rates.          We discuss aspects of Raytheon's
    industrial hygiene program and Brush's input to it below.
    B. Diagnosis of Chronic Beryllium Disease
    Genereux became ill many times during her employment at
    Raytheon.    Sometime in 1983 or 1984, she developed a cough and
    shortness of breath.     The symptoms were attributed to asthma, and
    physicians prescribed a treatment regimen of steroids and inhalers.
    Sometime    later,   Genereux   was   hospitalized    for   five   days   and
    5
    Genereux described two sandblasting machines. The first
    machine was equipped with a plexiglass shield or sash.          The
    operator would put on protective gloves and lower the sash over the
    gloves, operating the pencil blaster behind the sash. A year after
    Genereux arrived, this machine was replaced. The second machine
    may have been equipped with a complete sandblasting enclosure and
    local exhaust ventilation. It still emitted dust.
    6
    As the district court noted in its Memorandum & Order,
    Genereux also "alleges that she was exposed to airborne beryllium
    dust generated elsewhere in the plant that spread through the
    ambient air."
    -7-
    diagnosed with "recurrent asthma."           Physicians again prescribed
    inhalers, and supplemented them with prednisone. Genereux returned
    to work, but after a period of three to four months she developed
    an upper respiratory infection.        Exacerbation of asthma symptoms
    required Genereux to be hospitalized several times during the year.
    Throughout this period and afterwards, Genereux regularly sought
    emergency   care.    According   to    the   report   of   a   pulmonologist
    treating her, "she has gone to the emergency room approximately
    three times a year for respiratory complaints."
    In November 1990, Genereux took a medical leave of
    absence from Raytheon due to a high-risk pregnancy.               After her
    pregnancy, Genereux developed carpal tunnel syndrome and required
    surgery on both of her hands.           Unable to work, she went on
    "extended sick leave" from Raytheon and ultimately did not return.
    Genereux began to receive long-term disability benefits through
    Raytheon during this time.    However, in 1994 the insurance company
    discontinued benefits on the grounds that Genereux was no longer
    disabled.      Genereux   repeatedly    sought    reinstatement     of   the
    benefits, arguing that she remained completely disabled and was
    entitled to benefits until age sixty-five.
    Meanwhile, Genereux was formally diagnosed in 1997 with
    vascular Parkinson's disease in her right side, where she suffered
    from tremors, pain, and muscle weakness.          In late 2000 or early
    2001, finding that she was unable to pay her expenses, Genereux
    -8-
    wrote United States Senator Jack Reed, seeking his assistance in
    obtaining reinstatement of the long-term disability benefits and
    securing a pension.      In her letter, Genereux stated that she
    suffered from Parkinson's disease and was "totally disabled."
    Genereux then wrote:
    I am told that the causes of Parkinson's
    Disease are still being researched, I am told
    that environment may be a cause, but it may
    not be found out in my lifetime.         While
    working for Raytheon, I worked in rooms with
    asbestos ceilings (which left dust on the
    benches and other items) . . . . I was forced
    to sandblast beryllium ceramics with no masks,
    open   sandblasting   units,   no   protective
    clothing. I also used alot [sic] of acetone
    and other degreasing agents and worked in a
    small room off of a large plating room.
    She did not mention asthma, lung disease, or pulmonary symptoms of
    any kind.
    After receiving a written response to her letter in late
    2001 or early 2001, Genereux called Senator Reed's office.    During
    the ensuing conversation, a staff member asked Genereux "whether
    she had ever been tested for CBD [chronic beryllium disease]."
    According to Genereux, this was the first time she had ever heard
    of chronic beryllium disease.          Senator Reed's office advised
    Genereux to call the Department of Labor.7         Officials at the
    7
    On January 22, 2001, Senator Reed's office mailed
    Genereux a letter that stated, "Pursuant to your request for
    information concerning compensation for Berylium [sic] exposure,
    you should contact 1-877-447-9756 and leave your name and address
    for further information."
    -9-
    Department of Labor told Genereux about National Jewish Medical
    Center ("National Jewish"), a Colorado facility experienced in the
    treatment of chronic beryllium disease, and instructed her to call.
    Genereux contacted National Jewish sometime in early 2001.
    National Jewish recommended to Genereux that she take a
    blood test, known as the BeLPT test, to determine whether she was
    sensitized to beryllium.   National Jewish also provided her with a
    booklet explaining the causes, symptoms and treatment of chronic
    beryllium disease.   As the booklet explained,
    Beryllium   sensitization   often  leads   to
    disease, even in people who are no longer
    working with beryllium.     Most people with
    beryllium sensitization have granuloma scars
    in their lungs, and sometimes in other organs
    also. . . . Once a person has been exposed to
    beryllium, there is a lifelong risk of
    developing the disease.
    The booklet quantified this risk, stating that "[o]nly 1-6% of
    exposed people will develop beryllium disease," but noted that
    "certain work tasks have been associated with disease rates as high
    as 16%."   Those who were sensitized, it said, but did not develop
    the disease, "do not need treatment" but "need to be checked by a
    doctor regularly for signs of disease."
    On June 8, 2001, Genereux met with her primary care
    physician, Dr. David Ashley.   Notes from the meeting indicate that
    Genereux again raised concerns about "[p]otential exposure [to]
    Acetone, Berrilium [sic], Asbestos."   Genereux provided Dr. Ashley
    with the National Jewish booklet on chronic beryllium disease, an
    -10-
    illness previously unfamiliar to him.               According to Dr. Ashley,
    Genereux then connected beryllium exposure to her lung disease:
    Q. And did she suggest that there was some
    kind of problems that she was encountering
    that she thought was related to potential
    Beryllium exposure?
    A. Her breathing problems. I mean, she had
    childhood asthma that basically reoccurred as
    an adult, and she was labeled as an asthmatic,
    and she was wondering whether this, you know,
    could be something other than asthma . . . .
    On June 19, 2001, Genereux again met with Dr. Ashley.
    Notes from the meeting indicate that Dr. Ashley and Genereux
    discussed her exposure to beryllium during her employment at
    Raytheon, as well as the BeLPT test.              Dr. Ashley's office ordered
    a BeLPT test kit from National Jewish.             On June 20, 2001, Genereux
    had blood drawn at the laboratory in Dr. Ashley's office for use in
    a number of tests, including the BeLPT test.                 Dr. Ashley's office
    sent the completed BeLPT test kit to National Jewish in Colorado,
    where it was analyzed on June 23, 2001.                      Test results were
    classified      as   "abnormal."       Genereux    had   a   second    BeLPT   test
    analyzed on February 2, 2002, whose results were also abnormal. In
    late       August   2002,   Genereux   traveled    to    Colorado     for   further
    testing, where she was diagnosed with chronic beryllium disease.8
    8
    When Genereux returned from Colorado, she initially
    sought treatment from a local pulmonologist who had seen her prior
    to the diagnosis.    It seems that questions persisted about the
    diagnosis; the local pulmonologist, Dr. Corrao, was "not convinced"
    that Genereux had chronic beryllium disease. Genereux eventually
    left Dr. Corrao's care.
    -11-
    II.
    On June 22, 2004, Genereux, her husband Barry Genereux,
    and their two children filed suit in Massachusetts Superior Court
    against Brush, several other beryllium manufacturers, and Raytheon.
    On September 7, 2004, plaintiffs amended their complaint, naming
    American Beryllia and Hardric as additional defendants.         In the
    amended complaint, Genereux asserted seven causes of action against
    the defendants: negligence; breach of warranty; failure to warn;
    strict   liability   for   ultrahazardous   or   abnormally   dangerous
    activities; breach of Massachusetts's consumer protection statute,
    Massachusetts General Laws chapter 93A; fraudulent concealment; and
    conspiracy.   Barry Genereux and the Genereux children asserted six
    additional counts, based on liability for medical monitoring, loss
    of consortium, and breach of chapter 93A.
    On October 8, 2004, Brush and another defendant removed
    the case to federal district court, asserting jurisdiction under
    the Federal Officer Removal Statute, 
    28 U.S.C. § 1442
    (a)(1).9
    9
    Under the Federal Officer Removal Statute,
    A civil action . . . commenced in a State court against
    any of the following may be removed by them to the
    district court of the United States for the district and
    division embracing the place wherein it is pending:
    (1) The United States or any agency thereof or any
    officer (or any person acting under that officer) of the
    United States or of any agency thereof, sued in an
    official or individual capacity for any act under color
    of such office or on account of any right, title or
    authority claimed under any Act of Congress for the
    apprehension or punishment of criminals or the collection
    -12-
    Subsequently, the district court dismissed the sole count against
    Raytheon, a claim of liability for medical monitoring.               It also
    dismissed   counts    based   on     theories   of   strict    liability   and
    conspiracy, and all defendants other than Brush, American Beryllia,
    and Hardric.    Nine counts remained: (1) negligence; (2) breach of
    warranty; (3) failure to warn; (4) breach of chapter 93A towards
    Genereux; (5) fraudulent concealment; (6) loss of consortium based
    on negligence; (7) loss of consortium based on breach of warranty;
    (8) loss of consortium based on failure to warn; and (9) breach of
    chapter 93A towards Barry Genereux and the Genereux children.
    After    the   parties     conducted     discovery,   the   three
    remaining defendants moved for summary judgment.              Defendants made
    four arguments in common: (A) that the plaintiffs' claims were
    barred by the statute of limitations; (B) that the plaintiffs'
    claims were barred by the sophisticated user doctrine and the bulk
    supplier doctrine; (C) that Genereux did not work with their
    products; and (D) that the defendants were not the proximate cause
    of the plaintiffs' injuries. American Beryllia also argued that it
    of the revenue.
    
    28 U.S.C. § 1442
    (a)(1). Here, Brush's removal was based on its
    assertion that it was a "person acting under" an officer of the
    United States, because the beryllium-containing products it
    supplied to Raytheon were used in manufacturing "military
    hardware." See Camacho v. Autoridad de Telefonos de P.R., 
    868 F.2d 482
    , 486-87 (1st Cir. 1989). Removal under this statute does not
    require that all defendants agree to removal. Ely Valley Mines,
    Inc. v. Hartford Acc. & Indemn. Co., 
    644 F.2d 1310
    , 1315 (9th Cir.
    1981).
    -13-
    was entitled to summary judgment because under Massachusetts law,
    it was not subject to successor liability as a purchaser of assets.
    Taking the facts in the light most favorable to Genereux,
    the     district    court    concluded     that   Genereux     had     "performed
    activities     on    products    that     contained      beryllium,"    such    as
    "sandblasting,       welding,     filing,       and     brazing,"    which     had
    "generat[ed] airborne beryllium dust that Genereux inhaled."                   It
    also concluded that the defendants had each supplied Raytheon with
    products containing beryllium, including windows, pins, collectors,
    rectangular    plates,      discs,   rods,     tubes,   and   "beryllium     metal
    emitter rings." The court assumed, without deciding, that American
    Beryllia was subject to successor liability for injuries caused by
    products produced by General Ceramics, noting, "[t]he factual
    record on the issue of successor liability is not sufficiently for
    resolution [sic]."
    The district court then granted the motion for summary
    judgment on all nine remaining counts.                The court held that the
    plaintiffs' common-law claims (remaining counts (1)-(3) and (5)-
    (8)) were time-barred.          It noted that the common-law claims were
    subject to a three-year statute of limitations, but that under
    Massachusetts's "discovery rule," the limitations period only began
    to run when Genereux knew or had sufficient notice that she had
    been harmed, and knew or had sufficient notice of the cause of the
    harm.    After describing Genereux's appointments with Dr. Ashley in
    -14-
    June 2001, the court concluded that by June 19, 2001, at the
    latest, Genereux was aware that she might have chronic beryllium
    disease and that she was exposed to beryllium while at Raytheon.
    Thus, "[b]y June 19, 2001, she was sufficiently aware of the
    possibility that she contracted the disease through exposure to
    beryllium at Raytheon to start the statute of limitations."   Based
    on that start date, the court held that limitations period ended on
    June 19, 2004, three days before Genereux filed suit.
    The court held that the plaintiffs' statutory claims
    under chapter 93A (remaining counts (4) and (9)), which were
    subject to a four-year statute of limitations, were timely filed
    but barred by the sophisticated user doctrine.   Plaintiffs' theory
    of liability under chapter 93A turned on the defendants' failure to
    warn of the dangers of their products.10   The court noted that the
    sophisticated user doctrine relieves a manufacturer of liability
    for failing to warn when the "end user" knows or reasonably should
    know of a product's dangers.   After determining that Raytheon was
    the end user, the court concluded that Raytheon "had substantial
    knowledge of the dangers of beryllium exposure, manifest in three
    10
    In motions to the district court, plaintiffs asserted
    that defendants' failure to warn constituted an "unfair or
    deceptive act" within the meaning of chapter 93A, section 2(a).
    See Mass. Gen. Laws ch. 93A, § 2(a) (declaring unlawful "unfair or
    deceptive acts or practices in the conduct of any trade or
    commerce"); ch. 93A, § 2(c) (granting Massachusetts attorney
    general the authority to make rules and regulations interpreting
    section 2(a)); 
    940 Mass. Code Regs. 3.05
     (defining "general
    misrepresentations").
    -15-
    ways: knowledge held by employees; Raytheon's own policies and
    internal memoranda; and warnings provided to Raytheon by its
    suppliers."   In addition, "Raytheon was a sophisticated company,"
    which "ranked fifty-third in Fortune Magazine's Top 100 List of
    American Companies," and had a "keen appreciation of the dangers of
    beryllium, for which it ordained prophylactic procedures decades
    before Genereux's employment."
    Plaintiffs timely appealed and now ask us to reverse.
    They contend that the district court erred in determining that the
    statute of limitations expired before they filed suit and that the
    sophisticated user doctrine relieves the defendants from liability.
    Defendants argue that the district court properly resolved the
    issues it addressed, and raise as alternative grounds for upholding
    summary judgment the bulk supplier doctrine, plaintiffs' failure to
    show that Genereux was exposed to any products manufactured by the
    defendants, and the fact that defendants were not the proximate
    cause of Genereux's injuries.    American Beryllia also argues that
    it is not subject to successor liability for injuries caused by
    exposure to General Ceramics's products.
    III.
    We review de novo a district court's award of summary
    judgment. Arroyo-Audifred v. Verizon Wireless, Inc., 
    527 F.3d 215
    ,
    217 (1st Cir. 2008).    "Summary judgment is appropriate when 'the
    pleadings, depositions, answers to interrogatories, and admissions
    -16-
    on file, together with the affidavits, if any, show that there is
    no genuine issue as to any material fact and that the moving party
    is entitled to judgment as a matter of law.'"       Mass. Eye & Ear
    Infirmary v. QLT Phototherapeutics, Inc., 
    412 F.3d 215
    , 239 (1st
    Cir. 2005) (quoting Fed. R. Civ. P. 56(c)).         There exists a
    "genuine" issue of fact when "the evidence about the fact is such
    that a reasonable jury could resolve the point in favor of the
    nonmoving party."   S.E.C. v. Ficken, 
    546 F.3d 45
    , 51 (1st Cir.
    2008) (internal quotation marks and citation omitted).
    A. Statute of Limitations
    Under Massachusetts law, "actions of tort" and "actions
    of contract to recover for personal injuries" are subject to a
    three-year statute of limitations.    Mass. Gen. Laws ch. 260, § 2A.
    The counts in the amended complaint of negligence, breach of
    warranty, failure to warn, and fraudulent concealment fall into
    these categories and are all governed by this statute.    Fidler v.
    Eastman Kodak Co., 
    714 F.2d 192
    , 196 (1st Cir. 1983) (failure to
    warn); Olsen v. Bell Tel. Labs., Inc., 
    445 N.E.2d 609
    , 611 (Mass.
    1983) (negligence and breach of warranty); Noble v. Cournoyer, No.
    CA 946043, 
    1996 WL 1329385
    , at *2 (Mass. Super. Ct. Aug. 13, 1996)
    (fraudulent concealment).   Claims for loss of consortium are also
    subject to the three-year limitations period under section 2A.
    Olsen, 445 N.E.2d at 613.   In contrast, claims under chapter 93A
    -17-
    are subject to a four-year statute of limitations. Mass. Gen. Laws
    ch. 260, § 5A.
    1. Negligence, breach of warranty, failure to warn,
    fraudulent concealment
    The limitations period specified in section 2A commences
    "after the cause of action accrues."                  Mass. Gen. Laws ch. 260, §
    2A.   Normally, a cause of action for personal injury will accrue at
    the time of injury.         Koe v. Mercer, 
    876 N.E.2d 831
    , 836 (Mass.
    2007);   Riley   v.    Presnell,        
    565 N.E.2d 780
    ,   784    (Mass.    1991).
    However, under the discovery rule, "a cause of action does not
    accrue until the plaintiffs know or reasonably should have known
    that they were injured as a result of the defendant's conduct."
    Cornell v. E.I. Du Pont de Nemours & Co., 
    841 F.2d 23
    , 24 (1st Cir.
    1988) (citing Olsen, 445 N.E.2d at 611-12).                        Actual knowledge is
    not   the    standard,      but    "what       a    reasonable       person    in     [the
    plaintiff's] position would have known or on inquiry would have
    discovered."     Bowen v. Eli Lilly & Co., 
    557 N.E.2d 739
    , 743 (Mass.
    1990). The Supreme Judicial Court has analyzed this rule as having
    two   components:      "a   plaintiff         [must]        have    (1)   knowledge    or
    sufficient    notice     that     she    was       harmed    and    (2)   knowledge    or
    sufficient notice of what the cause of harm was."                            Bowen, 557
    N.E.2d at 742; see also Fidler, 
    714 F.2d at 198
     ("Such notice [to
    start the statute of limitations] includes not only knowledge that
    one has been injured but knowledge of its cause -- that plaintiff
    -18-
    'has been harmed as a result of the defendant's conduct.'" (quoting
    Olsen, 445 N.E.2d at 611)); Riley, 565 N.E.2d at 784-85.
    Application of the discovery rule ordinarily involves
    questions of fact and therefore "'in most instances will be decided
    by the trier of fact.'"       In re Mass. Diet Drug Litig., 
    338 F. Supp. 2d 198
    , 204 (D. Mass. 2004) (quoting Riley, 565 N.E.2d at 783); see
    also Wolinetz v. Berkshire Life Ins. Co., 
    361 F.3d 44
    , 49 (1st Cir.
    2004) (same).     In particular, application of the discovery rule
    involves determining "what the plaintiff knew or should have
    known[, which] is a factual question that is appropriate for the
    trier of fact."    Koe, 876 N.E.2d at 836; see also Borden v. Paul
    Revere   Life   Ins.   Co.,    
    935 F.2d 370
    ,   376     (1st   Cir.   1991)
    (characterizing the determination of whether the plaintiff should
    have known of an injury as "a fact-dominated enterprise"); Castillo
    v. Mass. Gen. Hosp., 
    649 N.E.2d 788
    , 790 (Mass. App. Ct. 1995).
    Determining when a plaintiff had notice of the likely cause of her
    injury is one example of such a determination.                 See Riley, 565
    N.E.2d at 786 ("A reasonable fact finder . . . could find that
    Riley did not make the causal link . . . .").
    Appellants   argue     that      the   district    court   erred   in
    determining that the limitations period began to run on June 19,
    2001, because Genereux did not know by this date that she had
    chronic beryllium disease, and thus lacked notice that she was
    injured. Appellees counter that under Massachusetts law, a disease
    -19-
    diagnosis is not necessary to trigger the statute of limitations.
    However, this case does not require us to decide whether a disease
    diagnosis is ever necessary for a plaintiff to have notice that she
    has been injured.      Genereux has long exhibited symptoms associated
    with chronic beryllium disease.               Her knowledge "that she had
    sustained substantial physical harm" is not at issue.             See Bowen,
    557 N.E.2d at 741.          Rather, the question is when Genereux had
    sufficient   notice     that    her    lung   disease   was   caused   by    the
    appellees' conduct.
    In Bowen, the Supreme Judicial Court considered for the
    first time the case of a plaintiff who was "well aware that she had
    sustained    substantial       physical    harm,"   but   may   have    lacked
    "sufficient[] . . . notice as to the cause of her physical harm."
    Bowen, 557 N.E.2d at 741.             The plaintiff in Bowen developed a
    malignant tumor and required extensive surgery to remove it.                Many
    years earlier, her mother had taken the drug diethylstilbestrol
    during pregnancy.      Id. at 740.      The question before the court was
    when the plaintiff had sufficient notice that her tumor was caused
    by diethylstilbestrol to trigger the statute of limitations.                Id.
    at 741.   Citing the plaintiff's possession of materials suggesting
    "the   prospect   of    a    significant      causal    connection"    between
    diethylstilbestrol and her "exceedingly rare" condition, the court
    concluded that the plaintiff acquired sufficient notice of the
    cause of her injury outside the limitations period.             Id. at 743.
    -20-
    Construing Massachusetts law, this court has previously
    characterized the level of notice of cause sufficient to trigger
    the statute of limitations as notice of "likely cause."    Fidler,
    
    714 F.2d at 199
    ; see also Cornell, 
    841 F.2d at 24
     ("[T]he level of
    notice required to start the statute running has been defined as
    likely cause." (internal quotation marks and citation omitted)).
    Massachusetts courts, including the Supreme Judicial Court, have
    repeatedly cited this language in their own decisions.   See Bowen,
    557 N.E.2d at 742; see also Demoulas v. Demoulas Super Mkts., Inc.,
    
    677 N.E.2d 159
    , 175 n.27 (Mass. 1997); Krasnow v. Allen, 
    562 N.E.2d 1375
    , 1379 (Mass. App. Ct. 1990); Lear-Heflich v. Schwartz, 
    485 N.E.2d 692
    , 694 (Mass. App. Ct. 1985); Murphy v. Novartis Consumer
    Health, Inc., No. 01-1702-A, 
    2005 WL 2319157
    , at *3 (Mass. Super.
    Ct. Aug. 10, 2005); Locke v. Jones, No. 022579B, 
    2005 WL 1009494
    ,
    at *2 (Mass. Super. Ct. Mar. 23, 2005).
    Appellants argue, as they did below, that Genereux's
    asthma diagnosis is relevant to determining when she had sufficient
    notice that her lung disease was "related" to beryllium exposure.11
    The district court did not mention asthma in its analysis of the
    11
    Appellee Brush contests that appellants made this
    argument below. In appellants' Memorandum of Law in Opposition to
    Brush's Motion for Summary Judgment, they argued: "The facts show
    that Suzanne too [sic] all reasonable steps to diagnose her
    condition, but it was not until 2002, less than three years before
    she commenced this action, that she learned the true cause of her
    lung problems."      Shortly thereafter, appellants discussed
    Genereux's asthma diagnosis.
    -21-
    limitations issue.             Nor have appellees addressed the matter,
    outside a footnote, in their briefing to this court.12                       We agree
    with        the    appellants      that    Genereux's       asthma   diagnosis     is
    significant.           At    the   time   Genereux   first    learned   of    chronic
    beryllium disease, she had long suffered from asthma symptoms.                     In
    fact, Genereux was diagnosed with asthma as a child, years before
    she was exposed to beryllium.                This diagnosis was confirmed on
    repeated occasions when Genereux was an adult. She was treated for
    asthma during her employment at Raytheon and afterwards, at times
    by a specialist.            In light of these facts, we cannot say, as we
    must    to    affirm,       that   no   reasonable   jury    could   conclude    that
    Genereux lacked notice, even after June 19, 2001, that her symptoms
    were "likely caused" not by asthma, but by another disease.                         A
    reasonable jury could conclude that Genereux's common-law claims
    were timely.          Thus there exists a genuine issue of material fact
    about the timeliness of those claims.13
    Close attention to the record supports the view that a
    material issue exists in this case about when Genereux had notice
    that the likely cause of her breathing problems was exposure to
    12
    In the footnote, Brush argues that Genereux's asthma
    diagnosis does not affect the statute of limitations because she
    was never told by a physician that beryllium was unrelated to her
    condition. In fact, the record belies this contention. See supra
    note 9; infra note 15.
    13
    A reasonable jury could also conclude that Genereux's
    common-law claims were untimely.
    -22-
    beryllium.   Sometime before June 8, 2001, National Jewish provided
    Genereux with the booklet on chronic beryllium disease.           According
    to the booklet, only 1-6% of people exposed to beryllium contract
    chronic beryllium disease, and "certain work tasks" are "associated
    with disease rates as high as 16%."         Even if Genereux believed she
    had a 16% chance of having chronic beryllium disease, she had been
    told since she was a child that she had asthma, and might have
    reasonably concluded that while there was a chance her symptoms
    were caused by exposure to beryllium, it was not the likely cause
    of her injury.       This conclusion is fully consistent with Dr.
    Ashley's testimony that during Genereux's June 8 appointment, she
    "was    wondering   whether   [her   condition],    you   know,   could   be
    something other than asthma."14
    Genereux's decision, on June 19, 2001, to take the BeLPT
    test does not compel the conclusion, as the summary judgment
    standard requires, that she then had notice beryllium was the
    likely cause of her injury.      On the contrary, a reasonable juror
    could view the BeLPT test as merely an initial step in exploring
    the possibility of chronic beryllium disease.             It was described
    14
    Moreover, the local pulmonologist who treated Genereux
    was apparently confident enough in the asthma diagnosis that he did
    not believe Genereux had chronic beryllium disease even after she
    was diagnosed at National Jewish in 2002. Physicians at National
    Jewish also expressed uncertainty about which of Genereux's medical
    events were attributable to chronic beryllium disease. They wrote,
    "it is difficult to determine if her hospitalizations for
    respiratory problems were truly due to asthma, or whether she was,
    in fact, suffering symptoms of chronic beryllium disease . . . ."
    -23-
    this way in the National Jewish booklet.           Thus, while we agree with
    the district court that "[a]ctual knowledge" of cause is "not the
    triggering event for the statute of limitations," we disagree that
    Genereux's decision to take the BeLPT test to explore the mere
    possibility that her symptoms were not caused by asthma, but by
    beryllium, shows as a matter of law that she was "sufficiently
    aware of the possibility that she contracted the disease through
    exposure    to    beryllium   at   Raytheon   to    start   the   statute   of
    limitations."
    However, on June 23, 2001, Genereux's BeLPT test was
    analyzed at National Jewish and the results were classified as
    abnormal.        The record does not indicate when National Jewish
    apprised Genereux of the results of her test.           Whatever that date,
    it was arguably at this point that Genereux had notice not simply
    that beryllium might have caused her lung disease, but that it was
    the likely cause.      If the limitations period did begin to run on
    June 23, 2001, then Genereux's common-law claims, filed on June 22,
    2004, were timely filed.
    We need not decide whether the statute of limitations on
    Genereux's common-law claims actually began to run on June 23,
    2001.   Instead, we hold that, on this record, a reasonable juror
    could conclude that Genereux first had sufficient notice of the
    cause of her injury after June 22, 2001.             In light of Genereux's
    asthma diagnosis and the low probability of developing chronic
    -24-
    beryllium disease, deciding when Genereux had notice that her
    symptoms were likely caused by beryllium "involves a decisional
    process fraught with resolution of factual issues," Castillo, 649
    N.E.2d at 790, such as how confident a reasonable person would have
    been during June 2001 of Genereux's previous asthma diagnosis, see
    Bowen, 557 N.E.2d at 743.     Resolution of such factual issues is
    "peculiarly within the province of the trier of fact."15     Castillo,
    649 N.E.2d at 790.   The district court should not have resolved the
    statute of limitations issue against Genereux on this summary
    judgment record.
    Applying the "likely cause" standard, we came to the same
    conclusion in Cambridge Plating Co. v. Napco, Inc., 
    991 F.2d 21
    , 29
    (1st Cir. 1993), where, on facts similar to this case, we reversed
    the district court's entry of summary judgment in favor of the
    defendant.    The    plaintiff,    Cambridge   Plating,   purchased   a
    wastewater treatment system from the defendant, Napco.       Cambridge
    Plating became aware early on that the system did not sufficiently
    15
    Our holding does not excuse plaintiffs previously
    diagnosed with a disease from being "willful[ly] ignoran[t]" of the
    possibility that their condition was caused instead by the
    defendant's conduct.   See In re Mass. Diet Drug Litig., 
    338 F. Supp. 2d at 203-04
    . Willful ignorance does not toll the statute of
    limitations.   
    Id.
       But neither does Massachusetts law require
    plaintiffs to have "the gift of prophecy" or to investigate every
    "speculati[on]" about their health. See Gore v. Daniel O'Connell's
    Sons, Inc., 
    461 N.E.2d 256
    , 259 (Mass. App. Ct. 1984).           We
    acknowledge that it can be difficult to separate willful from
    reasonable ignorance, and speculation from inevitable inference.
    It is for just this reason, we believe, that on this summary
    judgment record this matter should go to the jury.
    -25-
    clean its wastewater to meet regulatory requirements.         However,
    during the initial "debugging" of the system and afterwards,
    analysis of the problem focused on operation and not possible
    defects.    The question before the court was when Cambridge Plating
    had sufficient notice that the system's problems were caused by
    manufacturing defects to trigger the statute of limitations.        We
    reasoned:
    When the problems persisted despite
    Napco's   announcement  that   debugging   was
    complete, two explanations theoretically were
    available. Either the system itself was
    defective,    or   it  was    being   operated
    improperly. At this point, however, the two
    possibilities were not equally weighted.
    Cambridge Plating knew that the system was
    technically complex and required sensitive
    operation. And Napco's only response to
    Cambridge Plating's inquiries was to suggest
    ways to improve operation.
    In these circumstances, we do not
    believe Massachusetts law requires a finding
    that Cambridge Plating was on notice of the
    system's defects. A plaintiff is sufficiently
    aware of her cause of action, and thus should
    have discovered it, once she has received
    "notice of likely cause," Fidler, 
    714 F.2d at 199
     (quoted in Bowen, 408 Mass. at 207-08, 
    557 N.E.2d 739
    ).
    
    Id. at 29
    .    As we then explained, the "likely cause" standard does
    not require knowledge that the defendant is "the culprit," but a
    basis for identifying it as a "suspect."     Where Cambridge Plating
    could not choose between the two possible explanations for the
    system's failure, it lacked such a basis and a material issue
    existed for the jury to resolve.
    -26-
    2. Loss of consortium
    Like claims of negligence, breach of warranty, failure to
    warn, and fraudulent concealment, actions for loss of consortium
    are subject to the three-year statute of limitations under Mass.
    Gen. Laws chapter 260, section 2A.         Olsen, 445 N.E.2d at 613.
    Under Massachusetts law, loss of consortium is independent from the
    underlying claim of negligence brought by the injured spouse.    Id.
    at 612.     For this reason, the date of accrual of a loss of
    consortium claim and the underlying claim "must be determined
    separately."    Id. at 613; see also Lareau v. Page, 
    39 F.3d 384
    , 390
    (1st Cir. 1994); Angelini v. OMD Corp., 
    575 N.E.2d 41
    , 43 n.6
    (Mass. 1991).    While loss of consortium and the underlying claim
    will usually accrue at the same time, this may not always be true.
    Olsen, 445 N.E.2d at 613.    A consortium action may be timely even
    though the spouse's underlying negligence action is time-barred.
    See id.; Fidler v. E.M. Parker Co., 
    476 N.E.2d 595
    , 603-04 (Mass.
    1985) (discussing this possibility).
    In its Memorandum & Order granting summary judgment, the
    district court did not determine separately the date of accrual of
    the loss of consortium claims and the underlying claims brought by
    Genereux.    Rather, it denied all the "common law claims" on the
    basis of one date of accrual.           This was error.   We make no
    determination here about the date of accrual of the loss of
    consortium claims brought by Barry Genereux and the Genereux
    -27-
    children, and leave this matter to be determined in the district
    court.
    B. Sophisticated User Doctrine
    1. Legal principles
    Under Massachusetts law, a manufacturer of a product has
    a duty to warn foreseeable users of dangers in the use of that
    product of which the manufacturer knows or reasonably should know.
    Bavuso v. Caterpillar Indus., Inc., 
    563 N.E.2d 198
    , 201 (Mass.
    1990).     However,    under   the     sophisticated       user   doctrine,    a
    manufacturer   has    no   duty   to     warn   of    a    product's    latent
    characteristics or dangers when the end user knows or reasonably
    should know of those dangers.          See Carrel v. Nat'l Cord & Braid
    Corp., 
    852 N.E.2d 100
    , 108-09 (Mass. 2006); Hoffman v. Houghton
    Chem. Corp., 
    751 N.E.2d 848
    , 854-55 (Mass. 2001); Restatement
    (Second) of Torts § 388, cited in Carrel, 852 N.E.2d at 109.
    "[T]he   relevant    inquiry   turns     on   the    end    user's   level    of
    sophistication."     Hoffman, 751 N.E.2d at 854.
    The sophisticated user doctrine is sometimes explained as
    a corollary of the "open and obvious" doctrine. See, e.g., Carrel,
    852 N.E.2d at 109 (citing Koken v. Black & Veatch Constr., Inc.,
    
    426 F.3d 39
    , 45-46 (1st Cir. 2005) (applying Maine law)).                Under
    the open and obvious doctrine, a manufacturer has no duty to warn
    when the danger presented by a product is obvious.                Bavuso, 563
    N.E.2d at 201.       A warning under those circumstances would not
    -28-
    reduce the likelihood of injury. Id. Similarly, the sophisticated
    user   defense    applies       where   a    warning    is   unlikely    to    have    a
    deterrent effect.     See Hoffman, 751 N.E.2d at 855.                   The end user
    already   perceives       the    danger      because    of   his   sophistication.
    Restatement (Second) Torts § 388 cmt. k (1965) ("[T]he condition
    [is] . . . one which only persons of special experience would
    realize to be dangerous").
    Significantly, Massachusetts recognizes a sophisticated
    user defense when the end user knows or reasonably should know of
    the particular danger posed by the product. For example, in Carrel
    a camper was injured when he pulled on the end of a bungee cord,
    causing a knot in the cord to unwind and the cord to suddenly
    retract, striking him in the eye.                 Carrel, 852 N.E.2d at 103.          At
    trial on the camper's claim for failure to warn, the jury was
    instructed on the sophisticated user defense, and the defendant
    prevailed.    The Supreme Judicial Court upheld the instruction on
    appeal.      It   noted    that    it       was   the   practice   of    the   cord's
    distributor (not the manufacturer) to include in its shipments a
    document warning against using the bungee cord in a zip-line course
    in the precise manner that the camp had used it.                   The court also
    pointed out that a consultant had visited the camp, learned of the
    bungee cord's use, and disapproved, specifically instructing a camp
    employee to use a different kind of knot than the one which later
    unwound, causing the injury. Id. at 111-12. These warnings proved
    -29-
    that the end user knew "of the particular danger to be guarded
    against,   in   which   case   an     additional   warning   [from   the
    manufacturer] would have been superfluous."        Id. at 112.
    Conversely, where there is a lack of proof that the end
    user knew of the particular danger, courts have upheld a jury's
    verdict of liability against a manufacturer for failure to warn
    against a sophisticated user defense.16      Similarly, in Koken, 
    426 F.3d at 39
    , we held that, under Maine law, a welder was not a
    sophisticated user of fire blankets despite his awareness that
    welding created a fire hazard, since a reasonable fact-finder could
    have found that he was unaware of the limitations of the particular
    fire blanket he was using.17 We agreed with the district court that
    16
    See Gillespie v. Sears, Roebuck & Co., 
    386 F.3d 21
    , 29
    (1st Cir. 2004) (applying Massachusetts law) ("Gillespie admitted
    that the still-spinning blade was visible and audible, and that he
    'understood' that blades coasted, as any experienced user would
    assuredly know . . . .       The jury might have concluded from
    Gillespie's further testimony . . . that he was not 'fully aware'
    . . . of the duration of the danger and that a more explicit or
    conspicuous warning would have heightened his awareness and
    prevented the accident." (citations omitted)); Knowlton v. Deseret
    Med., Inc., 
    930 F.2d 116
    , 122 (1st Cir. 1991) (applying
    Massachusetts law) (concluding that a reasonably prudent heart
    surgeon might not have appreciated the danger of puncture posed by
    a particular catheter-threading technique despite understanding the
    need to thread the catheter with "great care" and being warned by
    the manufacturer that the needle could cut the catheter); see also
    Marois v. Paper Converting Mach. Co., 
    539 A.2d 621
    , 624 (Me. 1988)
    ("[T]he jury could have rationally found that, although generally
    aware of the inherent danger of the operation, the specific danger
    of the machine's design and clearing process was not obvious to, or
    known by, the Plaintiff." (emphasis added)).
    17
    See also Gray v. Badger Mining Corp., 
    676 N.W.2d 268
    , 277
    (Minn. 2004) (affirming district court's denial of defendant's
    -30-
    the fire hazard posed by welding was obvious "to both laymen and
    experienced welders."   
    Id. at 45
    .      We disagreed, however, that an
    awareness of the general hazard sufficed to make the welder a
    sophisticated user of the defendants' fire blankets:
    [I]n holding that the duty to warn was
    precluded by the known hazard of fire in torch
    cutting, we think that the district court gave
    too broad a scope to the open and obvious and
    sophisticated user doctrines. The fact that
    the risk of accident is well known does not
    preclude a duty to warn of particular risks,
    different from the general risk, if those
    risks are not open and obvious or known by a
    reasonable sophisticated user. For example,
    the risk of vehicle accidents on the highway
    is well known, and drivers of commercial
    trucks are sophisticated users of their
    equipment. There is no duty to warn of the
    general risk of an accident . . . But there
    may be a duty to warn that loading a
    particular kind of truck in a particular way
    could increase the risk of rollover (if that
    risk is not generally appreciated). In each
    case the analysis must focus on the particular
    risk and whether that risk is open or obvious
    or known to the sophisticated user.
    
    Id. at 45-46
    .    We then observed that "the necessity of . . . a
    particularized   analysis"   makes   it   important   to   "defin[e]   the
    claimed risk and the warning so that the issues of duty to warn and
    causation can be addressed intelligently."       
    Id. at 46
    .
    summary judgment motion and noting, "[plaintiff's] general
    knowledge of the risk was little more than the intuitive sense of
    danger from experiencing dust in the foundry environment. More
    specifically, there is no evidence that he knew that disposable
    respirators were ineffective in preventing silicosis in a foundry
    environment.").
    -31-
    Although these general principles are relevant here, we
    must emphasize a distinctive feature of this case. For the purpose
    of analyzing the sophisticated user defense, the plaintiff Genereux
    is not the end user whose sophistication is at issue.               The district
    court concluded that Raytheon was the end user of appellees'
    products.          Appellants   did   not     challenge    this   determination.
    Although Genereux relies on the duty to warn in her claims against
    the appellees, it follows that Brush, American Beryllia, and
    Hardric had no duty to warn Genereux of the dangers associated with
    using      their    beryllium    products      if   they    prevail      on     their
    sophisticated user defense -- that is, if they establish that
    Raytheon knew or reasonably should have known of those dangers.
    See     Kenneth     M.   Willner,     Note,    Failures     to    Warn    and     the
    Sophisticated User Defense, 
    74 Va. L. Rev. 579
    , 590 (1988) ("Under
    the duty approach [to the sophisticated user defense], a seller has
    no duty to warn an ultimate user when intermediate purchasers are
    knowledgeable.").18
    18
    It appears unsettled under Massachusetts law whether an
    intermediate party, such as Raytheon, is always the end user for
    purposes    of   the   sophisticated   user    defense   in   these
    employer/employee cases. See, e.g., Barbosa v. Hopper Feeds, Inc.,
    
    537 N.E.2d 99
    , 102 (Mass. 1989) (observing, in a case where the
    plaintiff sued the manufacturer of a product purchased by her
    employer, "It is true that a manufacturer has no duty to warn a
    plaintiff who is fully aware of the hazards posed by a product.
    This is not such a case." (internal citations omitted)); Slate, 510
    N.E.2d at 252 (noting that "the plaintiffs failed to present
    evidence that Bethlehem [the defendant supplier] knew of a danger
    that Slate [the plaintiff employee of the purchaser] did not
    appreciate.").
    -32-
    Normally, the existence of a duty of care is a question
    of law decided by a judge, not a jury.   Cottam v. CVS Pharmacy, 
    764 N.E.2d 814
    , 819 (Mass. 2002); W. Page Keeton et al., Prosser &
    Keeton on the Law of Torts 236 (5th ed. 1984) ("[W]hether, upon the
    facts in evidence, such a relation exists between the parties that
    the community will impose a legal obligation upon one for the
    benefit of the other . . . is entirely a question of law, . . . and
    it must be determined only by the court.").    However, in the case
    of the sophisticated user doctrine, as applied in Massachusetts,
    the existence of a duty to a plaintiff such as Genereux depends on
    the sophistication of the intermediary employer, which is a factual
    matter that may be resolved by the jury.    See Hoffman, 751 N.E.2d
    at 855 ("[T]he sophisticated user doctrine allows a fact finder to
    determine that no such duty was owed.").
    In this case, the focus of the sophisticated user defense
    is the knowledge of the intermediary in the three-party situation
    involving Genereux as an employee, Raytheon as an employer, and
    appellees as manufacturers of products for use in Raytheon's
    manufacturing operations.   Generally, an intermediary's knowledge
    may come from many sources.   Sometimes the analysis will focus on
    what the intermediary already knows, and sometimes it will depend
    on what the manufacturer tells the intermediary.    Here, appellees
    have placed the focus on themselves by introducing into the record,
    and relying on, evidence of warnings they provided Raytheon.
    -33-
    Nevertheless, we are not making a determination of whether the
    appellees exercised due care in warning Raytheon about their
    beryllium   products;    the   question     is    what    Raytheon    knew,     or
    reasonably should have known, as a result of the warnings.                     See
    Willner, supra, at 592 ("[T]he defense focuses on the actual
    knowledge   of   a   purchaser   or     user,    rather    than   .   .    .    the
    reasonableness of the sellers' conduct in warning or in failing to
    warn.").
    2. The particular dangers and Raytheon's knowledge of
    those dangers
    Appellees argue that the particular danger to be guarded
    against was chronic beryllium disease.            The record is clear that
    Raytheon knew that exposure to beryllium dust or fumes could cause
    chronic beryllium disease.       However, on the facts of this case,
    that proposition is stated too broadly.              Following Carrel and
    Koken, we must analyze "the particular danger[s] to be guarded
    against" in use of the appellees' beryllium products.             Carrel, 852
    N.E.2d at 112.
    Appellants   argue   that    Raytheon    was    unaware       of   five
    particular dangers:
    (1)   Raytheon   believed   that   beryllium
    operations should be air-sampled19 to ensure
    19
    Air sampling is a method of evaluating the concentration
    of airborne beryllium in a particular area.     There are several
    different methods for air sampling, which produce divergent
    measures of beryllium exposure.    In one method, a "high volume
    sampler" is used to draw air through a filter placed in the
    -34-
    compliance with the Occupational Health and
    Safety Administration's "Permissible Exposure
    Limit" ("PEL") only when they produced visible
    amounts of dust, while in fact all beryllium
    operations should be periodically air-sampled,
    and a workspace may be dangerous to human
    health even though no dust is visible;
    (2) Raytheon believed that local exhaust
    ventilation20 was required only for operations
    that produced visible dust, while in fact
    other beryllium operations should also be
    carried out under local exhaust ventilation;
    (3) Raytheon was unaware that beryllium dust
    can contaminate work clothing, which, if worn
    home, can cause injury to family members;
    (4)Raytheon   was  unaware   that  polishing
    beryllium metals without protective measures
    is unsafe; and
    (5)Raytheon was unaware that occupational
    exposures to an airborne concentration of 2
    µg/m3 of beryllium dust is unsafe.21
    breathing zone of a worker.     The filter is then analyzed for
    beryllium contaminants. Another method is referred to as "personal
    sampling," and aims to determine the amount of beryllium to which
    each individual worker is exposed.
    20
    Local exhaust ventilation is a means of ventilating a
    workspace to remove contaminants. It is sometimes accomplished by
    vacuuming out the dust generated by an operation through a hood
    placed over the workspace. In contrast, "general ventilation" is
    accomplished by an "air handling device" that circulates and
    conditions air in a defined area. General ventilation can enhance
    the risk posed by uncontrolled beryllium dust by circulating it
    throughout the area serviced by the air handling device, thereby
    increasing the number of individuals exposed to the dust.
    21
    In their argument to this court, appellees do not contest
    that any of these practices or standards are in fact dangerous to
    human health.
    -35-
    We     agree    with    the    district     court    that     Raytheon's
    awareness of the dangers posed by the beryllium products it used
    can be gleaned from the knowledge of its employees, its policies as
    evidenced     by    internal       memoranda,    and    warnings       provided    by
    suppliers.       We also agree with the district court that these
    categories of evidence establish that (1) Raytheon was aware that
    beryllium was toxic; (2) Raytheon was aware that exposure to
    beryllium could cause chronic beryllium disease; (3) Raytheon knew
    that exposure to beryllium dust, in particular, was hazardous; and
    (4) because of its concern about beryllium dust, Raytheon created
    safety policies for opening packages containing beryllium and for
    sandblasting       beryllium   oxide       ceramics    (even    if     these   latter
    policies    were    not    followed).       However,     we    disagree    with   the
    district court that this evidence establishes, as a matter of law,
    that Raytheon was a sophisticated user with respect to all of the
    particular dangers identified by the appellants.
    Instead, the record leads us to conclude that Raytheon
    knew, or should have known, of the following particular dangers:
    the need to air-sample all beryllium operations, the need to
    provide local exhaust ventilation for operations besides those that
    produced visible dust, and the risk to family members posed by work
    clothing     contaminated      with    beryllium       dust.      In    each   case,
    undisputed record evidence proves that Raytheon knew or should have
    known of the particular danger, often because it was informed of
    -36-
    the danger by the appellees, principally Brush.22 The sophisticated
    user defense is dispositive for these particular dangers. However,
    we also conclude that there are genuine issues of fact about
    whether   Raytheon    knew    or   should    have   known   of   the   last   two
    particular dangers identified above: (a) polishing beryllium metals
    without protective measures, and (b) exposing workers to airborne
    concentrations of 2 µg/m3 of beryllium dust.
    a. Polishing beryllium metals
    Appellants assert that Genereux polished beryllium metals
    while working in the Waltham plant's Backward Wave Oscillator Lab.
    They further assert that appellees failed to warn Raytheon of the
    need for hygienic controls during polishing, and that this caused
    Genereux injury.
    There are two genuine issues of material fact about
    appellants'   claim    that    make   the    summary   judgment    disposition
    22
    For example, Brush recommended that Raytheon air-sample
    "all operations where beryllium exposures exist" in a letter sent
    June 7, 1984.     This recommendation corroborated "Toxicity of
    Beryllium," a document contained in Raytheon's files, which
    recommended air sampling to determine the need for hygienic
    controls on "any operation."      On the matter of local exhaust
    ventilation, Brush sent several letters to Raytheon during the
    1980s stating that "[t]he preferred method of achieving [the 2
    µg/m3] standard is by local exhaust ventilation." Early Raytheon
    policies required local exhaust ventilation for operations that did
    not produce visible dust, such as opening packages from beryllium
    suppliers. Finally, the record is replete with warnings about the
    danger posed to family members by beryllium-contaminated work
    clothing. Documents containing such warnings include "Toxicity of
    Beryllium," "Beryllium," "Beryllium and its Compounds," and the
    1990 Brush Material Safety Data Sheet.
    -37-
    inappropriate.   The first issue relates to Genereux's exposure to
    beryllium dust generated by polishing. Appellee Brush asserts that
    Genereux "simply made up" the fact that she polished beryllium.
    However, Al Broadbent, Genereux's "direct supervisor" at Raytheon,
    stated in his deposition that his team "would polish" finished
    subassemblies. Whether Genereux herself was involved in this stage
    of the process is ambiguous.      Appellants' expert witness, John
    Martyny, described Genereux's use of a Dremel tool and sandpaper on
    beryllium metal parts as "polish[ing]."     For purposes of summary
    judgment, on this record, a reasonable fact-finder could conclude
    that Genereux polished beryllium metals and was therefore exposed
    to beryllium dust generated by polishing.
    Second, there is a genuine issue of material fact about
    when Raytheon knew or should have known that uncontrolled polishing
    posed a danger to the health of exposed workers.   Only a handful of
    documents in the record expressly discuss polishing.      First, on
    April 19, 1989, Brush provided Raytheon with a report entitled
    "Potential Beryllium Exposure While Processing Beryllia Ceramics
    for Electronic Applications," dated September 1988.      The report
    states that "wet polishing" could possibly result in exposures
    above 2 µg/m3.   Second, Brush included a Material Safety Data Sheet
    ("MSDS") in every shipment of beryllium to Raytheon.       The 1990
    version of the MSDS stated, "[a]irborne exposure to [beryllium] in
    excess of the occupational standards can occur when sintering,
    -38-
    machining,      grinding,   sanding,      polishing,   laser   scribing   and
    trimming, chemical etching, crushing, or otherwise abrading the
    surface of this material in a manner which generates finely divided
    particles."23     (Emphasis added.)
    Brush provided both of these warnings near the end of
    Genereux's employment. It is possible that before April 1989, when
    Brush sent Raytheon the "Potential Beryllium Exposure" report,
    Raytheon was unaware of the danger posed by polishing, and that
    during this time Genereux was exposed to beryllium dust generated
    by polishing.24
    Although the record does not show that Raytheon knew of
    the dangers posed by polishing before April 1989, it is possible
    that it should have known. Descriptions of polishing in the record
    suggest that "polishing" may denote a wider array of operations
    than    the   ordinary   use   of   the   term   suggests.     For   example,
    appellant's expert characterizes operations with sandpaper and a
    Dremel tool as "polishing."         If "polishing" includes sanding and
    the use of a Dremel tool, then arguably there were earlier warnings
    23
    We note that Brush's 1992 MSDS warned that beryllium
    exposure may occur during polishing, and Hardric's 2003 MSDS warned
    of the need for local exhaust ventilation "or other controls
    designed to prevent exposure" for polishing. Both warnings were
    provided after Genereux left Raytheon.
    24
    In fact, since Genereux worked as a quality assurance
    technician during her last year in the Waltham plant, the warnings
    provided in 1990 may have been received when Genereux was no longer
    exposed to beryllium dust produced by uncontrolled polishing
    processes.
    -39-
    about polishing that Raytheon should have understood.           In a letter
    sent August 29, 1983, Brush warned Raytheon that "[a] potential
    health risk can occur when grinding, machining, sanding, drilling,
    brazing, welding, or otherwise abrading or treating the surface in
    such a manner as to generate finely divided airborne particulate."
    (Emphasis added.)
    However,   the   record    is   far   from   clear   about   what
    activities constitute "polishing."         On the record developed thus
    far, a reasonable jury could reject the conclusion that warnings
    about sanding or abrasion were sufficient to warn about polishing
    as well.    Brush's practice was to warn users about specific
    operations that posed a danger: "grinding, machining, sanding,
    drilling, brazing, welding."         Although Brush also warned users
    against "otherwise abrading the surface in a manner which generates
    finely divided particles," it later decided to include polishing in
    the list of specific operations.           We conclude that there is a
    genuine issue of fact about whether Raytheon knew or should have
    known of the dangers posed by uncontrolled polishing, at least
    before April 1989.
    b. Occupational exposure to 2 µg/m3
    Appellants    assert    that    Raytheon     was   unaware   that
    exposures of 2 µg/m3 or less could cause its employees to develop
    chronic beryllium disease.        They assert that appellees knew that
    there might be a danger posed by such exposures to their products,
    -40-
    but that they failed to warn Raytheon.             In response, appellees
    point to evidence that Raytheon already knew of the danger posed by
    exposures at 2 µg/m3.
    There is a genuine issue of material fact as to whether
    Raytheon was aware that exposures of 2 µg/m3 or less could cause
    its employees to develop chronic beryllium disease.              The record
    contains evidence that Raytheon was aware that exposures at the 2
    µg/m3 level were dangerous.         Crucially, however, the record also
    contains evidence that Raytheon distinguished between occupational
    exposures and non-occupational (or "out-plant," or "neighborhood")
    exposures, and believed that only non-occupational exposures at the
    2 µg/m3 level posed a danger of chronic beryllium disease.               Non-
    occupational exposures may occur among individuals who live in the
    vicinity of a plant where beryllium is processed.               According to
    "Beryllium     Project,"   a     Raytheon    memorandum,   non-occupational
    exposures could cause disease at lower exposure levels because the
    beryllium particles involved were smaller, and thus possessed
    "greater reactivity."      The same document stated that occupational
    exposures of 2 µg/m3, in contrast, were "considered safe."                Not
    only   did   Raytheon's    own   documents    expressly    distinguish   non-
    occupational    and   occupational     beryllium   exposures,    the   record
    contains multiple letters from Brush stating that no occupational
    cases of chronic beryllium disease had been reported where plants
    observed the 2 µg/m3 standard.              In light of this evidence, a
    -41-
    reasonable jury could conclude that during the time of Genereux's
    employment, Raytheon did not believe that workplace exposures of 2
    µg/m3 or less posed a threat to its employees, such as Genereux.25
    We excerpt the relevant evidence below.             For purposes of
    clarity, we have divided the evidence into two categories: (i)
    internal Raytheon documents, and (ii) information provided by Brush
    to Raytheon concerning hazards posed by beryllium.26
    i. Internal Raytheon documents
    Of   particular    relevance        among    Raytheon's     internal
    documents are those from a file maintained by Walter Hartford,
    McCarthy's predecessor and a Raytheon Safety Manager from 1970-
    1989.        The most important of these documents, "Beryllium Project,"
    a Raytheon memo dated November 16, 1960, expressly states that 2
    µg/m3        exposures   are   safe:   "In   view    of     the   many   unknowns   in
    beryllium pathology, the only possible preventative has been to
    reduce the atmospheric concentrations to within safe limits,"
    25
    Scientists studying chronic beryllium disease have long
    distinguished occupational and non-occupational exposures.     See
    Morgan v. Brush Wellman, Inc., 
    165 F. Supp. 2d 704
    , 710-11 (E.D.
    Tenn. 2001) (discussing the early study of non-occupational
    exposure to beryllium). In this case, appellants' claim is that
    Raytheon was unaware that it was dangerous to expose Genereux to 2
    µg/m3 of beryllium in the work setting.
    26
    Although we focus on materials provided by Brush to
    Raytheon, we have also examined warnings provided by Hardric and
    General Ceramics, which appellants argue is the predecessor of
    appellee American Beryllia. Except for MSDSs, warnings provided by
    Hardric and General Ceramics contain no information that arguably
    informed Raytheon of the particular dangers identified by
    appellants.
    -42-
    namely, "[t]he in-plant atmospheric concentration of beryllium
    should not exceed 2 µg/m3 averaged over an 8 hour day."       (Emphasis
    added.)   The document goes on to distinguish between safe exposure
    levels for "in-plant" and "out-plant" areas.         The basis for the
    distinction is the "greater reactivity" of beryllium dust particles
    in the non-occupational setting.
    The 2 µg/m3 allowed . . . for an average daily
    exposure is considered to be well within the
    concentrations necessary for causing the
    chronic disease. It should be noted that the
    "in-plant" concentration of 2 µg/m3 is
    considered safe whereas 40-50 cases have been
    reported in the neighborhood of beryllium
    processing plants where monitoring indicated
    only .01 µg/m3. One reason proposed for the
    higher    incidence   of   chronic   beryllium
    poisoning     with   these   relatively    low
    concentrations of beryllium is the smaller
    particle size and thus greater reactivity of
    beryllium in the "out-plant" area.
    (Emphasis added.)
    Another   document   in   Raytheon's   files,   "Toxicity   of
    Beryllium," a 1962 report authored by the Air Force, reinforces
    this distinction by stating that chronic beryllium disease has not
    been reported at plants observing the 2 µg/m3 standard: "To date no
    case of either acute or chronic beryllium disease has been reported
    in connection with plant operations at which these standards
    [exposures at 2 µg/m3] have not been exceeded."
    ii. Materials provided by Brush
    Brush provided Raytheon with a considerable number of
    documents about the safety of beryllium products.      These materials
    -43-
    almost   uniformly   corroborate    the   impression   that   occupational
    exposures at the 2 µg/m3 level are safe.       For example:
    C          Brush published MSDSs in 1983, 1985 and 1990, and
    provided   them  to   Raytheon   throughout  Genereux's
    employment. All of the MSDSs identify the beryllium PEL
    or TLV as 2 µg/m3. MSDSs provided by American Beryllia
    also identify the 2 µg/m3 value.
    C          On May 24, 1979, Brush mailed Raytheon a letter, to which
    it attached a paper entitled "Beryllium and Its
    Compounds," authored by the American Industrial Hygiene
    Association, and dated 1964.     The paper identifies a
    "Recommended Maximal Atmospheric Concentration" of 2
    µg/m3.
    C          Letters mailed to Raytheon on June 7, 1984, October 24,
    1984, August 8, 1986, and March 3, 1989, state, "[d]aily
    weighted average exposure over an eight-hour day may not
    exceed 2.0 micrograms beryllium per cubic meter of air."
    In addition, Brush mailed its customers material that
    impugned prior evidence that exposures at the 2 µg/m3 level were
    dangerous and stated that occupational exposures at that level had
    never produced chronic beryllium disease. On April 18, 1989, Brush
    mailed Raytheon a letter, to which it attached several documents
    discussing   beryllium   exposure    levels.     Included     among   those
    documents was its own paper, "Safe Handling of Beryllia Ceramics,"
    dated November 1983.
    C          The paper's introduction explained, "[u]ntil a few years
    ago almost all beryllium oxide production and fabrication
    was performed in a limited number of facilities. . . .
    Because of the integrated nature of early beryllium
    operations, much of the literature concerning the health
    and safety aspects of beryllium is quite general in
    nature and not applicable to simple beryllium operations.
    Accordingly, a good deal of confusion still exists
    concerning the relative hazards of handling beryllia.
    The purpose of this document is to answer the questions
    -44-
    most often posed by those engaged in the handling of
    beryllia   and  thereby   to  summarize  the  health
    considerations involved in this aspect of beryllium
    activity." (Emphasis added.)
    C         The 1983 "Safe Handling" paper included a number of
    questions and answers, such as, "Q. What are the health
    hazards associated with the handling of beryllia? A. The
    only potential problem of any significance associated
    with the handling of beryllia is the inhalation of
    excessive amounts of respirable beryllium. Q. What is an
    excessive amount?    A. . . . The majority of people,
    perhaps as much as 99%, apparently do not seem to react
    adversely to beryllium exposures at any level. A small
    percentage of people do develop an immunological
    response. . . . Opinion varies as to what level of
    exposure is apt to produce a reaction in a hypersensitive
    person but we do know that there has never been an
    illness recorded where exposures were kept at, or below,
    the threshold limit values originally recommended by the
    U.S. Atomic Energy Commission in 1949 and subsequently
    established by the U.S. Occupational Safety and Health
    Administration . . . ." (Emphasis added.)
    C         The 1983 "Safe Handling" paper also explained, "Q. If
    these recommended standards have been so effective in
    controlling beryllium illness, what about the hundreds of
    cases one hears about?      A.   Hygienic controls were
    established in the late 1940s. Prior to that time . . .
    [people] were exposed to massive doses of beryllium under
    completely uncontrolled conditions. In many cases people
    exposed in the early 1940s did not develop symptoms of
    illness until years afterward.      Thus, we still hear
    occasionally of a 'new' beryllium illness due to those
    old exposures. Q. Does this mean that there have been no
    cases of beryllium disease as a result of exposures in
    recent years? A. No. New cases of beryllium disease,
    although relatively infrequent, still occur as a result
    of accidental or negligent exposures in excess of the
    permissible concentration levels." (Emphasis added.)
    The point that occupational exposures at the 2 µg/m3 level pose no
    danger to employees was repeated in subsequent materials from
    Brush.
    -45-
    C         Also attached to Brush's April 18, 1989 letter were two
    versions of a paper entitled, "Potential Beryllium
    Exposure   While   Processing   Beryllia   Ceramics   for
    Electronic Applications." The first version of the paper
    was authored by Martin Powers, a Brush employee, and
    published in 1982.    It states: "There has not been a
    nonoccupational case of beryllium disease as a result of
    exposure since the 1940's and the acute disease, which is
    only found in beryllium producer plants, has not been
    seen in the past decade." (Emphasis in original.)
    C         The second version of "Potential Beryllium Exposure,"
    authored by Marc Kolanz and Richard Davis, and published
    in September 1988, states: "No one is able to define the
    dividing line between safe and unsafe concentration of
    beryllium with any precision.      Therefore, the AEC-
    recommended levels [2 µg/m3], which are now OSHA
    standards, incorporate a margin of safety. Although the
    exact margin of safety is not known, we do know that
    there has never been an occupational case of [chronic
    beryllium disease] when the exposure was at or even near
    the 2 µg/m3 level . . . ." (Emphasis in original.)
    C         In a July 19, 1989 letter sent by Brush to its beryllia
    customers, Brush physician Dr. Thomas Markham states,
    "[t]he fact that no beryllium disease cases have been
    reported where the standard has been met provides
    immutable testimony to its effectiveness."
    Taken together, we think that this evidence establishes
    a genuine issue of material fact about whether Raytheon knew, or
    reasonably should have known, that exposures to beryllium at the 2
    µg/m3 level could cause employees like Genereux to develop chronic
    beryllium disease.    To be sure, the record contains some evidence
    suggesting that Raytheon was aware that exposures at 2 µg/m3 could
    be dangerous.27      However, the "Beryllium Project" memo clearly
    27
    James McCarthy, who became a Raytheon safety engineer in
    1989, testified that he understood in the 1980's that it was
    possible for a person to develop chronic beryllium disease from
    exposures below 2 µg/m3. However, McCarthy described such exposure
    -46-
    distinguishes      between   occupational       exposures    and    "out-plant"
    exposures,       expressly   stating    that    the   2    µg/m3   standard   is
    "considered safe" in the occupational setting.               According to the
    Raytheon memo "Beryllium Project," Raytheon believed that non-
    occupational exposures at or below the 2 µg/m3 level were dangerous
    due   to   the    "greater   reactivity"       of   the   beryllium   particles
    involved.    That occupational exposures at that level were safe
    would have been corroborated by multiple documents, including the
    "Safe Handling" paper, the "Potential Beryllium Exposure" papers,
    and the Markham letter, all of which asserted that no chronic
    beryllium disease had ever been discovered in an occupational
    setting where the 2 µg/m3 standard was observed.              On this basis, a
    reasonable fact-finder could conclude that Raytheon reasonably
    believed workplace exposures of 2 µg/m3 or less posed no danger to
    its employees.
    levels as being "lower than those that are appropriate for general
    manufacturing populations, certainly."     It is unclear whether
    McCarthy believed that such exposures put workers, such as
    Genereux, at risk. (McCarthy also testified that his knowledge of
    Raytheon during the period that Genereux worked in the Backward
    Wave Oscillator Lab was "[n]othing more than anecdotal," and that
    he remembered nothing "specific.")     In addition to McCarthy's
    testimony, an undated memo entitled "Beryllium" surmises that
    "'safe' levels of beryllium may ultimately be set below one
    microgram per cubic meter of air." Brush allegedly provided this
    memo to Raytheon, possibly attached to its April 18, 1989 letter.
    Attached to the same letter was the "Potential Beryllium Exposure"
    report, which stated that there had not been a single
    nonoccupational case of chronic beryllium disease in plants
    observing the 2 µg/m3 limit.    At best, this evidence creates a
    genuine issue of material fact about whether Raytheon was aware of
    the danger posed to workers such as Genereux by 2 µg/m3 exposures.
    -47-
    Moreover, we cannot ignore the evidence of Brush's effort
    to persuade its customers that occupational exposures to beryllium
    at the 2 µg/m3 level do not cause chronic beryllium disease.             In
    light of this evidence, a reasonable jury could conclude that even
    if Raytheon did suspect, at one time, that exposures at the 2 µg/m3
    level were dangerous to their workers, Brush convinced it that this
    suspicion was unreasonable.28       While Raytheon is a sophisticated
    company, the record reveals that Brush is much more sophisticated
    in its understanding of beryllium, the dangers posed by beryllium,
    and how best to implement hygienic controls.         Brush is the leading
    producer of beryllium, has been involved in beryllium research for
    sixty years, was recognized as an expert on beryllium by Raytheon's
    employees, and held itself out to Raytheon as a beryllium expert --
    which it was.
    3. Conclusion
    This    record   does   not   entitle   appellees   to   summary
    judgment on the sophisticated user defense.            There are genuine
    issues of material fact about whether Raytheon knew, or reasonably
    should have known, of the particular dangers posed by polishing
    beryllium metals and by exposing its workers to concentrations of
    beryllium at the 2 µg/m3 level.      Therefore, we cannot conclude, for
    purposes   of     summary   judgment,    that   Genereux's   employer   was
    28
    Evidence in the record supports the conclusion that
    Raytheon would adjust its hygienic controls in light of input from
    Brush. See infra section III(C)(3).
    -48-
    sufficiently knowledgeable of the dangers she faced to relieve the
    appellees of their duty to warn Genereux of those dangers.                  See
    Willner,     supra,   at    590-92   (discussing     this   version    of   the
    sophisticated user defense).
    Of   course,     the   record    leaves   little   question      that
    Raytheon was, generally speaking, as the district court noted, a
    sophisticated company, and that it knew a considerable amount about
    beryllium.      Still, it would be speculative to infer, on these
    grounds alone, that Raytheon knew or should have known of the
    polishing and two-microgram-level dangers.             There is simply no
    basis in the record from which a reasonable fact-finder could draw
    such an inference.         Cf. Johnson v. Am. Standard, Inc., 
    179 P.3d 905
    , 916-17 (Cal. 2008) (record contained evidence about what
    plaintiff's profession "could reasonably be expected to know");
    Humble Sand & Gravel v. Gomez, 
    146 S.W.3d 170
    , 175 (Tex. 2004)
    (record contained testimony about what one would expect a person in
    the plaintiff's profession to know).          The district court was wrong
    to conclude otherwise.
    C. Appellees' Alternative Grounds for Affirmance
    1. Bulk supplier doctrine
    As the Massachusetts Supreme Judicial Court has made
    clear, the bulk supplier doctrine is a "separate, conceptually
    discrete" defense from the sophisticated user doctrine.               Hoffman,
    751 N.E.2d at 854 (citing Donahue v. Philips Petroleum Co., 866
    -49-
    F.2d   1008,    1012   (8th    Cir.    1989)).   Under   the   bulk   supplier
    doctrine, a supplier of bulk products "discharge[s] its duty to
    warn end users of a product's hazards by reasonable reliance on an
    intermediary" to transmit an appropriate warning. Id. The Supreme
    Judicial Court has stated that "[f]or the bulk supplier doctrine to
    apply, a product must be delivered in bulk to an intermediary
    vendee."   Id.     This requirement reflects two rationales for the
    doctrine: that products delivered in bulk are often reformulated
    and repackaged by an intermediary, making it unlikely that the
    supplier could provide a warning that would reach end users; and
    that bulk supplies are often put to "multitudinous commercial
    uses," making it unduly burdensome to require the supplier to warn
    all foreseeable end users.            Id. at 856-57.
    If    the    bulk   supplier     doctrine   applies,   a   supplier
    discharges its duty to warn only if it has reasonably relied on the
    intermediary     to    transmit   its     warnings.    Id.   at   854.    "The
    reasonableness inquiry is fact intensive," id. at 856, and factors
    that may determine whether reliance was reasonable are:
    (1) the dangerous condition of the product;
    (2) the purpose for which the product is used;
    (3) the form of any warnings given; (4) the
    reliability of the third party as a conduit of
    necessary information about the product; (5)
    the magnitude of the risk involved; and (6)
    the burden imposed on the supplier by
    requiring that he directly warn all users.
    Id.; see also Tilton v. Union Oil Co. of Cal., 
    831 N.E.2d 391
    , 394
    (Mass. App. Ct. 2005).
    -50-
    The district court held that whether the bulk supplier
    doctrine applied to the appellees "raises at least one question of
    material fact."      We agree.     For the bulk supplier doctrine to
    apply,   a   supplier   must    supply   its   products    in     bulk   to    an
    intermediary vendee. In Hoffman, the Supreme Judicial Court stated
    that "[b]ulk products are often delivered in tank trucks, box cars,
    or large industrial drums."      751 N.E.2d at 856.       As explained, the
    characteristics of this method of supply justify permitting a
    supplier to discharge its duty to warn by reasonably relying on an
    intermediary to transmit its warnings.          See id. at 856-57.            The
    record does not show whether appellees supplied their products in
    box cars or by comparable means, and appellees do not argue in
    their briefing to this court that the summary judgment record
    permits a resolution of this question. For that reason alone, this
    alternative ground of decision is not available to the appellees.
    2. Genereux did not work with appellees' products
    Taking the facts in the light most favorable to the
    appellants    and   resolving   all    inferences   in    their    favor,     the
    district court below concluded that appellees had supplied Raytheon
    "with a wide variety of products containing beryllium."             It stated
    that American Beryllia had supplied Raytheon with beryllium oxide
    components, including windows, pins and collectors; that Brush had
    supplied Raytheon with rectangular plates, discs, rods and tubes;
    -51-
    and that Hardric had supplied "beryllium metal emitter rings" made
    from raw materials supplied to Hardric by Brush.
    Appellees argue that we should affirm summary judgment on
    the ground that the appellants have produced no evidence that
    Genereux ever worked with their products.           We disagree.      Taken in
    the appropriate light, the record supports the conclusion that
    Genereux worked with beryllium products manufactured by appellees.
    As to Brush, the record contains invoices showing that Brush
    shipped beryllium oxide components, including "windows" (discs) and
    rectangles, to Raytheon's Waltham plant.          Genereux testified that
    she   worked   with   beryllium   oxide   discs   and    rectangles    in   the
    Backward Wave Oscillator Lab.       The record also contains evidence
    that Brush supplied beryllium to intermediate fabricators, who
    altered the pieces and sold them to Raytheon.            For example, Brush
    supplied Hardric with beryllium metal tubes, which it made into
    "emitter rings" and delivered to the Waltham plant.           Lastly, as to
    American Beryllia, invoices included in the record show that its
    predecessor, General Ceramics, supplied beryllium oxide "windows"
    to Raytheon's Waltham plant throughout the 1980s.
    Taken in the light most favorable to the appellants and
    resolving all inferences in their favor, the record supports the
    conclusion     that    Genereux    worked    with       beryllium     products
    manufactured by appellees.
    -52-
    3. Proximate causation
    Appellees argue that even if they breached their duty to
    warn Genereux, summary judgment should be affirmed because their
    conduct was not the proximate cause of Genereux's injury.             In
    support of this argument, appellees point to record evidence that
    Raytheon removed the warnings that appellees did provide and failed
    to   heed    warnings     about    controlling    beryllium   exposures,
    particularly in connection with the sandblasting of beryllium
    ceramics. These practices, appellees argue, show that Raytheon was
    the proximate cause of Genereux's injury.29
    Under Massachusetts law, a "defendant is liable for the
    foreseeable intervening conduct of a third party whether that
    conduct is negligent or not."      Wilborg v. Denzell, 
    268 N.E.2d 855
    ,
    859 (Mass. 1971) (collecting cases); Jones v. Cincinnati, Inc., 
    589 N.E.2d 335
    ,   338   (Mass.   App.   Ct.   1992).   "'[O]nly   unusual,
    extraordinary negligence of a third party will excuse an original
    tortfeasor's liability.'"       Jones, 
    589 N.E.2d at 338
     (quoting A.L.
    29
    There is a close relationship, in this case, between the
    proximate cause arguments and the sophisticated user defense. Both
    focus on Raytheon, the intermediary between the appellees and
    Genereux.   The thrust of the proximate cause arguments is that
    Raytheon's conduct in removing warnings and failing to heed
    warnings implies that any warnings the appellees did provide would
    have been insufficient to prevent injury to Genereux. In similar
    fashion, the sophisticated user defense argues, in effect, that any
    failure of the appellees to warn did not proximately cause injury
    to Genereux because Raytheon, who controlled her workspace and owed
    her a duty of care as well, knew or should have known of the
    dangers in question but failed to protect her.
    -53-
    v. Commonwealth of Mass., 
    521 N.E.2d 1017
    , 1023 (Mass. 1988)).
    Whether conduct meets this standard depends on the "character [of
    intervening events], and . . . the natural and probable connection
    between the wrong done and the injurious consequence." Solimene v.
    B. Grauel & Co., 
    507 N.E.2d 662
    , 666 (Mass. 1987) (internal
    quotation marks and citation omitted).            Proximate causation is
    normally a jury question.       
    Id. at 665
     ("Generally, questions of
    causation, proximate and intervening, present issues for the jury
    to decide.").
    In this case, the record provides some support for
    appellees' claim that Raytheon did not pass on their warnings to
    employees.30    However, the record also shows that Raytheon created
    warnings of its own to accompany beryllium parts throughout the
    Waltham plant.    These warnings were roughly similar in content to
    appellees' warnings, stating that beryllium was "toxic," and that
    employees should avoid operations that generated dust.          Raytheon's
    practice of issuing its own warnings distinguishes this case from
    the   authority   cited   by   the   appellees,   in   which   an   employer
    transferred a hazardous product from drums, which bore a warning,
    to a small container "with no label or warnings thereon of any
    type."     Whitehead v. Dycho Co., 
    775 S.W.2d 593
    , 595 (Tenn. 1989);
    30
    For example, although appellees included warnings in
    every shipment of beryllium products to Raytheon, Genereux
    testified that she never saw any warnings accompanying beryllium
    parts in the Backward Wave Oscillator Lab.
    -54-
    cf. Cohen v. Steve's Ice Cream, 
    737 F. Supp. 8
    , 8-9 (D. Mass. 1990)
    (similar). In contrast to such a practice, we cannot conclude that
    Raytheon's act of replacing manufacturer warnings with its own
    warnings       was   unforeseeable   intervening   conduct,   or   that    it
    constituted "unusual, extraordinary negligence." Jones, 
    589 N.E.2d at 338
     (internal quotation marks omitted).            A reasonable fact-
    finder could conclude that by issuing its own, roughly similar
    warnings, Raytheon exercised some care in protecting the health and
    safety of its employees.
    Whether Raytheon heeded appellees' warnings presents a
    slightly different issue.       Like most jurisdictions, Massachusetts
    presumes that a user will follow a warning if it is given.
    Knowlton, 
    930 F.2d at 123
    ; Wolfe v. Ford Mtr. Co., 
    376 N.E.2d 143
    ,
    147 (Mass. App. Ct. 1978); Restatement (Second) of Torts § 402A
    cmt. j (1965).          As we explained the presumption in Knowlton,
    "'where no warning is given, or where an inadequate warning is
    given,     a    rebuttable   presumption    arises,   beneficial   to     the
    plaintiff, that the failure to adequately warn was a proximate
    cause of the plaintiff's [injury].'"          Knowlton, 
    930 F.2d at 123
    (quoting Seley v. G.D. Searle & Co., 
    423 N.E.2d 831
    , 838 (Ohio
    1981)); see also Garside v. Osco Drug, Inc., 
    976 F.2d 77
    , 81 (1st
    Cir. 1992).      While no court has yet stated what must be proved to
    defeat this presumption under Massachusetts law, the authority
    discussed in Knowlton held that the defendants had surmounted the
    -55-
    presumption by proving that "an adequate warning would have made no
    difference" in preventing injury to the plaintiff.                 Seley, 423
    N.E.2d at 838.
    In this case, there is indeed record evidence that
    Raytheon    failed   to    implement      and   enforce   hygienic      controls
    necessary    to   maintain     beryllium    exposure    levels   of     2   µg/m3,
    particularly in the context of sandblasting beryllium ceramics.
    However, there is also record evidence that Raytheon had strict
    hygienic controls, including controls of sandblasting operations;
    that Raytheon repeatedly sought out Brush's advice about what
    controls were necessary; and that Raytheon was inclined to adjust
    hygienic    practices     in   response    to   input   from   Brush.       James
    McCarthy, a Raytheon Safety Engineer, testified:
    Brush   Wellman   provided    a   variety   of
    information that Raytheon considered to be
    reliable.   We certainly considered that and
    compared that information against the controls
    that were in place and the configuration of
    those controls, certainly considered it in
    constructing the -- both the allowances and
    the prohibitions that were incorporated into
    the control programs at Raytheon Company
    . . . .
    In light of the conflicting evidence about the hygienic practices
    at Raytheon and Raytheon's reliance on Brush, we cannot conclude,
    for purposes of summary judgment, that a warning about the danger
    posed by polishing or occupational exposures to beryllium at the 2
    µg/m3 level would have gone unheeded.
    -56-
    4. Successor liability as to American Beryllia
    American Beryllia argues that we should affirm summary
    judgment as to it on the grounds that it is not subject to
    successor liability for injury caused by products manufactured by
    General Ceramics.        American Beryllia advances three arguments in
    support    of    this    conclusion:    (1)      that   it    purchased     General
    Ceramics's      assets   at   a   bankruptcy     sale   pursuant      to   an   Asset
    Purchase Agreement that rendered the assets "free and clear of all
    . . . claims and interests of any nature whatsoever"; (2) that the
    July 9, 2001, Bankruptcy Court order confirming the Amended Plan of
    Orderly Liquidation prohibited any distributions to creditors other
    than    distributions     pursuant    to   the    Plan;      and   (3)   that   under
    Massachusetts law, which applies to this case, American Beryllia
    did not assume the liabilities of General Ceramics because it was
    a purchaser of assets.            In response, appellants argue that this
    case is governed by New Jersey law, and that under New Jersey law
    American Beryllia is liable for injuries caused by General Ceramics
    even though it is a purchaser of assets, because it fits under the
    (1) "continuation" and (2) "product line" exceptions to the general
    rule.
    The arguments raised by American Beryllia and appellants
    are of considerable complexity, involving federal bankruptcy law,
    state choice-of-law principles, state law of corporations, and the
    relationships between these doctrines.              The district court below
    -57-
    declined   the   reach   the   matter,    stating   that   the   record   was
    insufficient to resolve it.      The matter should be resolved in the
    first instance by the district court on an appropriate record.
    IV.
    For the foregoing reasons, the judgment of the district
    court granting summary judgment to the defendants is vacated.             We
    remand for further proceedings consistent with this opinion. Costs
    are awarded to appellants.
    So ordered.
    -58-
    

Document Info

Docket Number: 07-2676

Filed Date: 8/20/2009

Precedential Status: Precedential

Modified Date: 12/21/2014

Authorities (26)

Cohen v. Steve's Ice Cream , 737 F. Supp. 8 ( 1990 )

prod.liab.rep. (Cch) P 13,309 Milissa Garside v. Osco Drug, ... , 976 F.2d 77 ( 1992 )

Gore v. Daniel O'Connell's Sons, Inc. , 17 Mass. App. Ct. 645 ( 1984 )

Koken v. Black & Veatch Construction, Inc. , 426 F.3d 39 ( 2005 )

In Re Massachusetts Diet Drug Litigation , 338 F. Supp. 2d 198 ( 2004 )

Marois v. Paper Converting MacHine Co. , 1988 Me. LEXIS 38 ( 1988 )

prodliabrep-cch-p-14085-gail-a-lareau-and-michael-lareau , 39 F.3d 384 ( 1994 )

Morgan v. Brush Wellman, Inc. , 165 F. Supp. 2d 704 ( 2001 )

Isaac Camacho v. Autoridad De Telefonos De Puerto Rico , 868 F.2d 482 ( 1989 )

Ronald Borden v. The Paul Revere Life Insurance Company, ... , 935 F.2d 370 ( 1991 )

Jones v. Cincinnati, Inc. , 32 Mass. App. Ct. 365 ( 1992 )

Johnson v. American Standard, Inc. , 74 Cal. Rptr. 3d 108 ( 2008 )

Gillespie v. Sears, Roebuck & Co. , 386 F.3d 21 ( 2004 )

Cambridge Plating Co., Inc. v. Napco, Inc. , 991 F.2d 21 ( 1993 )

Whitehead v. Dycho Co., Inc. , 1989 Tenn. LEXIS 391 ( 1989 )

Krasnow v. Allen , 29 Mass. App. Ct. 562 ( 1990 )

Deborah Fidler v. Eastman Kodak Company , 714 F.2d 192 ( 1983 )

Securities & Exchange Commission v. Ficken , 546 F.3d 45 ( 2008 )

Wolinetz v. Berkshire Life Insurance , 361 F.3d 44 ( 2004 )

prod.liab.rep.(cch)p 12,804 Mark T. Knowlton v. Deseret ... , 930 F.2d 116 ( 1991 )

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