Northgate Village Development v. Orem City , 427 P.3d 391 ( 2018 )


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    2018 UT App 89
    THE UTAH COURT OF APPEALS
    NORTHGATE VILLAGE DEVELOPMENT LC,
    Appellant,
    v.
    OREM CITY,
    Appellee.
    Opinion
    No. 20160408-CA
    Filed May 17, 2018
    Fourth District Court, Provo Department
    The Honorable Lynn W. Davis
    No. 090401127
    J. Craig Smith, Kathryn J. Steffey, and Clayton H.
    Preece, Attorneys for Appellant
    Jody K. Burnett and Robert C. Keller, Attorneys
    for Appellee
    JUDGE DAVID N. MORTENSEN authored this Opinion, in which
    JUDGES MICHELE M. CHRISTIANSEN and KATE A. TOOMEY
    concurred.
    MORTENSEN, Judge:
    ¶1     Northgate Village Development LC purchased property
    from Orem City containing multiple stockpiles of buried
    garbage, including asphalt and other debris. Although the
    parties anticipated that some cleanup would be necessary, the
    amount of garbage ultimately discovered was significant,
    generating cleanup costs of nearly $3 million. Northgate and the
    City dispute who should pay for the cleanup of what garbage.
    The district court entered orders excluding evidence of any
    garbage unrelated to asphalt and excluding two of Northgate’s
    expert witnesses from testifying. Northgate, on interlocutory
    Northgate Village Development v. Orem City
    appeal, contends that these rulings were in error. We agree and
    reverse.
    BACKGROUND
    ¶2      Northgate agreed to purchase property from the City to
    develop it for mixed use. The City had previously used the
    property for its public works facility. The site had apparently
    also been used to dump “hundreds of thousands of tons of
    debris,” which included removed curb, gutter, sidewalk, asphalt,
    trees, tires, and transformers, among other things.
    ¶3     Before the sale, the parties anticipated the presence of at
    least some of the debris, and the City agreed to “complete any
    environmental clean-up responsibilities specified in the written
    action plan” for the site. As Northgate discovered more and
    more garbage, the parties disputed the meaning of the action
    plan and the specific responsibilities the City was required to
    perform. Northgate filed suit against the City in 2009, 1 asserting
    damages of close to $3 million in compensation for cleaning up
    garbage.
    ¶4     The litigation proceeded through discovery and the
    parties eventually submitted competing motions for summary
    judgment. The district court, in large part, granted the City’s
    motion and denied Northgate’s motion, ruling that the City was
    1. The date of filing is important as it informs what version of the
    discovery rules should be applied to the case. Rule 26 of the
    Utah Rules of Civil Procedure, which governs discovery, was
    amended in 2011, after this case was filed. See Utah R. Civ. P. 26.
    As we more thoroughly explain below, infra ¶ 27, the pre-
    amendment version of the rule applies here because Northgate
    originally filed its petition before the amendment’s effective
    date.
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    Northgate Village Development v. Orem City
    responsible only for reimbursing Northgate for removal and
    disposal of buried electrical transformers. Northgate appealed
    that order, providing this court with its first occasion to review
    this case. This court affirmed in part and reversed in part. See
    Northgate Village Dev. LC v. Orem City (Northgate I), 
    2014 UT App 86
    , ¶ 1, 
    325 P.3d 123
    . Because on remand the district court
    interpreted the holding of Northgate I as limiting the type of
    garbage the City is obligated to clean up, this court’s treatment
    of the term “asphalt” in Northgate I is of particular importance.
    ¶5     In Northgate I, this court affirmed the district court’s
    determination that the sale contract obligated the City to
    perform only those cleanup actions listed on the “Clean-Up List”
    attached to the contract. Id. ¶ 31. However, this court reversed
    the district court’s first interpretation of the Clean-Up List and
    determined that the Clean-Up List “contains ambiguities,”
    specifically noting that it “does not clearly indicate how the City
    must deal with buried asphalt.” Id. ¶¶ 36, 39. This court
    explained,
    [I]n the section of the Clean-Up List describing the
    City’s clean-up responsibilities in the “Soil Borrow
    & Landfill Area,” there are three entries:
    1. Landfilling construction materials with
    pieces of asphalt
    2. Permit required for continued landfilling
    3. Site assessment and application required
    for closure of site
    Northgate and the City ascribe contrary meanings
    to this section of the Clean-Up List. In the City’s
    view, the first and second entries should be read
    together, allowing the City to fulfill its obligation
    to clean up the asphalt by simply applying for and
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    Northgate Village Development v. Orem City
    receiving proper permits. In Northgate’s view, the
    first and second entries impose separate
    requirements: the City must clean up the
    “construction materials with pieces of asphalt” and
    must also apply for and receive permits for any
    continued landfilling.
    Both the City’s reading and Northgate’s are
    plausible. Consequently, without reference to parol
    evidence of the parties’ intent, we see no way to
    select one reading of the asphalt provision over the
    other. The Land Sale Contract therefore contains a
    facial ambiguity, and resolving this facial contract
    ambiguity requires evidence of the parties’
    intent. Because the intent of the parties is a
    question of fact to be determined by the jury, the
    district court erred by determining at summary
    judgment that the City could fulfill its asphalt
    clean-up responsibilities by securing the proper
    permits. We therefore vacate the district court’s
    determination on this issue.
    
    Id.
     ¶¶ 37–38 (cleaned up). 2 This court ultimately concluded,
    “Because we recognize facial ambiguities in the Clean-Up List,
    we vacate the district court’s determination that the City
    satisfied its clean-up obligations. We reverse the district court’s
    grant of summary judgment and remand to allow the district
    court to hear evidence regarding the parties’ intent with respect
    to asphalt clean-up[.]” Id. ¶ 55.
    ¶6   After remand, the case proceeded and became focused on
    two points of contention, which we review in detail. We first
    2. Northgate I contains a detailed description of the potential
    environmental hazards of buried asphalt. See 
    2014 UT App 86
    ,
    ¶ 37 n.5, 
    325 P.3d 123
    .
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    Northgate Village Development v. Orem City
    outline the facts pertaining to the City’s pretrial request to
    preclude Northgate from introducing evidence of its
    remediation of certain types of buried debris. In ruling on this
    issue, the district court considered how this court construed the
    term “asphalt” in Northgate I. Second, we review the facts
    surrounding Northgate’s attempt after remand, as required by
    Northgate I, to articulate its damages as limited by the geographic
    areas specified in the Clean-Up List and the district court’s
    eventual exclusion of certain expert testimony.
    Exclusion of Evidence Under Rules 401 and 403
    ¶7      The City moved to exclude evidence of Northgate’s
    removal of garbage other than asphalt from the site, arguing the
    evidence was improper under rule 403 of the Utah Rules of
    Evidence. The City argued that the “[p]resentation of such
    evidence, testimony, or argument will . . . unfairly prejudice the
    City to the extent that it unnecessarily imputes actionable
    conduct to the City, particularly to the extent that it may be
    alleged that the City violated environmental regulations.”
    Northgate countered that the construction debris with asphalt
    was intermingled with the rest of the garbage—including buried
    transformers that the City was required to remove—and that
    “the exclusion from evidence of all references to hazardous
    materials found on the . . . site would be prejudicial error.” The
    district court granted the City’s motion.
    ¶8     Although the City had moved to exclude evidence only
    under rule 403, the district court decided the issue almost
    exclusively under rule 401. 3 The district court excluded under
    rule 401 any “evidence regarding Northgate’s removal of
    3. We note that Northgate does not argue that the district court
    erred by sua sponte deciding the issue under rule 401. Northgate
    argues only the merits of the court’s rule 401 decision, and we
    analyze only the arguments Northgate brings on appeal.
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    construction material not containing asphalt.” It reasoned that
    “the City’s responsibility regarding landfill material not
    containing asphalt is not at question in this case per the Court of
    Appeals’ ruling; the Clean-Up List does not include a provision
    for such landfill material. Therefore, under the Court of Appeals’
    ruling, that material has no bearing in this case.” The district
    court further reasoned that, despite Northgate’s claim that
    removing asphalt without removing other garbage would be
    impossible, “the percentage of urban detritus excavated on the
    property amounted to only 5–10% of the total debris excavated, a
    negligible expense.” The district court also reasoned that any
    dumping fees associated with removing garbage other than
    asphalt would likely be offset by the “saved costs in crushing the
    construction material containing asphalt and refilling the
    excavation site with it.” Upon this analysis, the district court
    concluded that “evidence regarding the other construction
    material aside from the asphalt is not relevant.”
    ¶9    The district court also ruled that the evidence of other
    garbage should be excluded under rule 403. The district court
    provided only one statement on the matter, saying, “[M]oreover,
    it would be more prejudicial than probative.” The court did not
    analyze how or why that evidence would be prejudicial.
    Exclusion of Expert Testimony
    ¶10 On remand, Northgate filed a motion to extend discovery
    to allow its experts to identify and limit its claim for damages to
    the geographic areas outlined in the Clean-Up List in light of the
    decision in Northgate I. The district court granted the motion, and
    Northgate timely filed supplemental disclosures and reports
    from its experts, Expert 1 and Expert 2.
    ¶11 Expert 1’s supplemental disclosure refers to, among other
    things, Greenfield, an excavation company that Northgate hired
    to assist in unearthing and removing garbage. The disclosure
    also refers to a bookkeeping and accounting employee for one of
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    Northgate Village Development v. Orem City
    Northgate’s related entities (Northgate Employee). Expert 1
    reported, “Based on work location designations for each
    Greenfield invoice prepared by or under the direction of
    [Northgate     Employee],       and  associated    underlying
    documentation reviewed by the project supervisor, charges by
    Greenfield to Northgate for site remediation were allocated by
    pit[.]” Expert 2’s report referenced Expert 1’s supplemental
    disclosure and made conclusions “[b]ased on the information
    provided” in Expert 1’s report.
    ¶12 After the close of the extended discovery period, the City
    contested the reliability of these expert reports in a motion to
    exclude Expert 1’s and Expert 2’s testimony, arguing that
    Northgate Employee’s bookkeeping, upon which the experts’
    opinions were based, was unreliable. Northgate Employee had
    testified, in reference to an “apportionment document” that she
    had prepared—which demonstrated an allocation of excavation
    costs to particular areas—that she “[did not] remember how
    [allocating costs by area] was done” or “where [numbers for
    yardage calculations] came from.” The City argued that
    Northgate’s experts were not reliable because they relied on
    Northgate Employee’s report, which itself was unreliable.
    Northgate responded to the motion to exclude with declarations
    from Expert 1 and Expert 2 that they did not rely on Northgate
    Employee’s “apportionment document” in forming their
    opinions.
    ¶13 The district court excluded the testimony of Expert 1 and
    Expert 2. In its ruling, the district court concluded that, based on
    the experts’ declarations, their testimony met the threshold for
    reliability under rule 702(b) of the Utah Rules of Evidence.
    However, while applying the most current version of the Utah
    Rules of Civil Procedure, the district court concluded that the
    declarations were a form of supplementation after the discovery
    deadline and that “[t]he expert reports failed to contain ‘all data
    and other information that will be relied upon by the witness in
    forming those opinions.’” (Quoting Utah R. Civ. P. 26(a)(4)(A).)
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    Northgate Village Development v. Orem City
    Consequently, the district court “exclude[d] the expert testimony
    of [Expert 1] and [Expert 2] under Utah R. Civ. P. 37(f) for failing
    to comply with Rule 26 disclosures.” Northgate appeals.
    ISSUES AND STANDARDS OF REVIEW
    ¶14 Northgate presents three issues for review. First, it
    contends that “the [district] court erred in finding that evidence
    of all buried debris, other than transformers and asphalt, is not
    relevant under Utah Rule of Evidence 401.” “The [district] court
    has broad discretion in determining the relevancy of offered
    evidence, and error will be found only if the [district] court
    abused its discretion.” Chapman v. Uintah County, 
    2003 UT App 383
    , ¶ 7, 
    81 P.3d 761
     (cleaned up). Generally, the abuse-of-
    discretion standard of review includes “review to ensure that no
    mistakes of law affected a lower court’s use of its discretion.”
    State v. Barrett, 
    2005 UT 88
    , ¶ 17, 
    127 P.3d 682
    . A district court’s
    ruling based on a misunderstanding of the rules of evidence is a
    “threshold legal error,” the application of which we owe no
    deference. State v. Richardson, 
    2013 UT 50
    , ¶ 23, 
    308 P.3d 526
    .
    Further, “[a] district court’s interpretation of case law presents
    an issue of law, which we review for correctness.” Utah Dep’t of
    Transp. v. Boggess-Draper Co., 
    2016 UT App 93
    , ¶ 12, 
    373 P.3d 210
    (cleaned up).
    ¶15 Second, Northgate contends that the district court erred in
    excluding evidence of Northgate’s removal of buried debris not
    containing asphalt under rule 403. “We review a [district] court’s
    decision to admit or exclude evidence under Rule 403 of the
    Utah Rules of Evidence under an abuse of discretion standard,
    and will not overturn a lower court’s determination of
    admissibility unless it is beyond the limits of reasonability.”
    Diversified Holdings L.C. v. Turner, 
    2002 UT 129
    , ¶ 6, 
    63 P.3d 686
    (cleaned up). “[L]egal errors, such as the incorrect interpretation
    of a statute or the application of an improper legal standard, are
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    Northgate Village Development v. Orem City
    usually an abuse of discretion.” Schroeder v. Utah Attorney Gen.’s
    Office, 
    2015 UT 77
    , ¶ 49, 
    358 P.3d 1075
    .
    ¶16 Third, Northgate contends that the district court erred
    when it excluded Northgate’s expert witnesses by applying rule
    26 of the Utah Rules of Civil Procedure as amended after 2011,
    arguing that the court should instead have applied the pre-
    amendment rule. “Generally, the [district] court is granted broad
    latitude in handling discovery matters, and we will not find
    abuse of discretion absent an erroneous conclusion of law or
    where there is no evidentiary basis for the [district] court’s
    rulings.” Thurston v. Workers Comp. Fund of Utah, 
    2003 UT App 438
    , ¶ 11, 
    83 P.3d 391
    . “The proper interpretation of a rule of
    procedure is a question of law, and we review the [district]
    court’s decision for correctness.” State v. White, 
    2016 UT App 241
    ,
    ¶ 10, 
    391 P.3d 311
     (cleaned up). Again, the “application of an
    improper legal standard” usually constitutes “an abuse of
    discretion.” Schroeder, 
    2015 UT 77
    , ¶ 49.
    ANALYSIS
    I. Exclusion of Evidence Under Rule 401
    ¶17 The district court ruled that the evidence of any garbage
    Northgate removed from the site other than asphalt was not
    relevant—and therefore inadmissible—under rule 401 of the
    Utah Rules of Evidence. Northgate contends that this exclusion
    was in error, specifically arguing that “[t]he [district] court’s
    ruling misinterprets and misapplies the Court of Appeals’ ruling
    by improperly limiting the type of buried debris listed on the
    Clean-Up List.” 4 We agree.
    4. The City claims that Northgate failed to preserve this
    argument. However, Northgate specifically argued to the district
    (continued…)
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    Northgate Village Development v. Orem City
    ¶18 Evidence is relevant if (1) “it has any tendency to make a
    fact more or less probable than it would be without the
    evidence” and (2) “the fact is of consequence in determining the
    action.” Utah R. Evid. 401. Based on the district court’s reading
    of this court’s ruling in Northgate I, the district court ruled that
    evidence regarding Northgate’s removal of other construction
    material that was not asphalt was not relevant to decide
    “whether the City was bound under the Agreement to remove
    asphalt from the property.” The district court ruled, “[T]he
    City’s responsibility regarding landfill material not containing
    asphalt is not at question in this case per the Court of Appeals’
    ruling; the Clean-Up List does not include a provision for such
    landfill material. Therefore, under the Court of Appeals’ ruling,
    that material has no bearing in this case.” But, we determine that
    the district court incorrectly interpreted Northgate I and thus
    erroneously excluded evidence as irrelevant.
    ¶19 This court’s decision in Northgate I did not narrow the
    scope of relevant evidence solely to asphalt, as the district court
    determined. Instead, this court specifically ruled (1) that
    Northgate’s interpretation of the contract—that the City must
    clean up “‘construction materials with pieces of asphalt’ and
    must also apply for and receive permits for any continued
    landfilling”—was “plausible,” Northgate I, 
    2014 UT App 86
    ,
    ¶¶ 37–38, 
    325 P.3d 123
    , and (2) that “[t]he Land Sale
    Contract . . . contains a facial ambiguity, and resolving this facial
    (…continued)
    court, “If you look at the Court of Appeals’ opinion . . .
    paragraph 37 states, ‘In Northgate’s view, the first and second
    entries impose separate requirements. The City must clean up
    the, quote, “construction materials with pieces of asphalt,” end
    quote, and must also apply for and receive permits for any
    continued land filling.’ So it’s not just asphalt.” We therefore
    conclude that the City’s preservation argument is meritless.
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    Northgate Village Development v. Orem City
    contract ambiguity requires evidence of the parties’ intent,” id.
    ¶ 38. This court concluded, “Because we recognize facial
    ambiguities in the Clean-Up List, we vacate the district court’s
    determination . . . and remand to allow the district court to hear
    evidence regarding the parties’ intent with respect to asphalt
    clean-up[.]” Id. ¶ 55. Thus, the ultimate holding of Northgate I is
    that the Clean-Up List is ambiguous, meaning that the
    interpretation of the Clean-Up List should be left to the jury. Id.
    ¶¶ 35, 38.
    ¶20 Further demonstrating that Northgate I did not narrow the
    type of relevant evidence, nowhere in the opinion is there any
    analysis of the phrase “construction materials with pieces of
    asphalt.” Although Northgate I referred to the phrase
    “construction materials with pieces of asphalt,” by way of
    shorthand, as “the asphalt provision” or “asphalt clean-up,” it
    never substantively analyzed or limited that term of the contract.
    Id. ¶ 38. Instead, as stated, the Northgate I court (1) concluded the
    Clean-Up List is ambiguous as to what the parties intended to
    include and (2) identified the interpretation and determination
    of the scope of that provision as an issue to be decided by the
    jury, not the court. We therefore reject the district court’s
    conclusion that Northgate I narrowed the type of relevant
    evidence.
    ¶21 The district court’s analysis of the question of relevance
    was based on a misreading of Northgate I. Accordingly, because
    the district court based its determination on an incorrect
    interpretation of the law, we conclude that the court abused its
    discretion by excluding the evidence. See Schroeder v. Utah
    Attorney Gen.’s Office, 
    2015 UT 77
    , ¶ 49, 
    358 P.3d 1075
     (“[L]egal
    errors, such as the incorrect interpretation of a statute or the
    application of an improper legal standard, are usually an abuse
    of discretion.”); State v. Richardson, 
    2013 UT 50
    , ¶ 23, 
    308 P.3d 526
    (reversing the trial court’s rulings under rules 401 and 402 based
    on a “threshold legal error”); State v. Barrett, 
    2005 UT 88
    , ¶ 17,
    
    127 P.3d 682
     (explaining that the abuse-of-discretion standard of
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    Northgate Village Development v. Orem City
    review generally includes “review to ensure that no mistakes of
    law affected a lower court’s use of its discretion”).
    II. Exclusion of Evidence Under Rule 403
    ¶22 While the district court based its decision to exclude
    evidence primarily under rule 401, the court also summarily
    concluded that the evidence should be excluded under rule 403.
    Northgate argues that this ruling should be reversed because the
    district court “appl[ied] the wrong standard in requiring only a
    showing that [such] evidence ‘would be more prejudicial than
    probative’ rather than the correct legal standard that the alleged
    prejudice ‘substantially outweighs the probative value.’” We
    agree.
    ¶23 Relevant evidence may be excluded “if its probative value
    is substantially outweighed by a danger of one or more of the
    following: unfair prejudice, confusing the issues, misleading the
    jury, undue delay, wasting time, or needlessly presenting
    cumulative evidence.” Utah R. Evid. 403. “A district court abuses
    its discretion under rule 403 only where it applies the wrong
    legal standard or its decision is beyond the limits of
    reasonability.” Met v. State, 
    2016 UT 51
    , ¶ 96, 
    388 P.3d 447
    (cleaned up).
    ¶24 Here, the district court applied the incorrect legal
    standard. Its only reference to the issue was its conclusion that
    admitting evidence of all the types of garbage “would be more
    prejudicial than probative.” The court did not explain whether it
    determined the prejudice to be “unfair,” nor did it explain
    whether the probative value was “substantially outweigh[ed]”
    by the danger of any unfair prejudice, as the rule requires. See
    Utah R. Evid. 403. Instead, the court stated only that the
    evidence “would be more prejudicial than probative.” Thus, the
    district court applied the incorrect legal standard by failing to
    determine whether the probative value was substantially
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    Northgate Village Development v. Orem City
    outweighed by the danger of unfair prejudice—mere prejudice is
    not enough.
    ¶25 We therefore conclude that the district court abused its
    discretion by excluding evidence under rule 403. See Met, 
    2016 UT 51
    , ¶ 96.
    III. Exclusion of Expert Testimony
    ¶26 Northgate contends that the district court erred when it
    excluded the testimony of its experts, Expert 1 and Expert 2.
    Specifically, Northgate argues that the district court applied the
    wrong version of the Utah Rules of Civil Procedure and, in so
    doing, applied an inapplicable, heightened disclosure standard.
    Northgate further argues that, because its disclosures satisfied
    the old rule pertaining to disclosure of expert testimony, the
    district court’s error was not harmless. We agree.
    ¶27 The Utah Rules of Civil Procedure were amended in 2011.
    Among the rules affected by the 2011 amendment was rule 26,
    which generally governs disclosure and discovery. Compare Utah
    R. Civ. P. 26(a)(3)(B) (2009) (requiring the expert report to
    contain “the subject matter on which the expert is expected to
    testify[,] the substance of the facts and opinions to which the
    expert is expected to testify[, and] a summary of the grounds for
    each opinion”), 5 with 
    id.
     R. 26(a)(4)(A) (2018) (requiring the
    expert report to contain “a brief summary of the opinions to
    which the witness is expected to testify[ and] all data and other
    information that will be relied upon by the witness in forming
    those opinions”). The purpose of the 2011 amendments was
    to reduce discovery costs by requiring each party
    to produce, at an early stage in the case, and
    5. Northgate originally filed its petition in 2009. Thus, we cite the
    2009 version of the Utah Rules of Civil Procedure.
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    Northgate Village Development v. Orem City
    without a discovery request, all of the documents
    and physical evidence the party may offer in its
    case-in-chief and the names of witnesses the party
    may call in its case-in-chief, with a description of
    their expected testimony. In this respect, the
    amendments build on the initial disclosure
    requirements of the prior rules.
    
    Id.
     R. 26 advisory committee notes. “Due to the significant
    changes in the discovery rules, the [Utah] Supreme Court order
    adopting the 2011 amendments makes them effective only as to
    cases filed on or after the effective date, November 1, 2011,
    unless otherwise agreed to by the parties or ordered by the
    court.” 
    Id.
     R. 1 advisory committee notes.
    ¶28 Here, the district court excluded the testimony of
    Northgate’s experts after applying the current rule. The district
    court stated, “The expert reports failed to contain ‘all data and
    other information that will be relied upon by the witness in
    forming those opinions.’” (Quoting 
    id.
     R. 26(a)(4)(A).) The
    language that the district court quoted is not found in the old
    rule, but is a direct quote from the current rule. Because this
    matter has been pending since 2009, prior to the 2011
    amendments, the old rule applies, and therefore the district
    court erroneously applied the post-amendment standard. 6
    ¶29 Such an error in the application of the law is an abuse of
    discretion. See Schroeder v. Utah Attorney Gen.’s Office, 
    2015 UT 77
    ,
    ¶ 49, 
    358 P.3d 1075
     (explaining that the “application of an
    improper legal standard” usually constitutes “an abuse of
    discretion”); Thurston v. Workers Comp. Fund of Utah, 
    2003 UT App 438
    , ¶ 11, 
    83 P.3d 391
     (explaining that a district court abuses
    6. We note that the parties refer to no agreement between one
    another, nor any order from the district court, establishing that
    the amended rule should apply.
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    Northgate Village Development v. Orem City
    its discretion in deciding matters of discovery where it makes
    erroneous conclusions of law).
    ¶30 The City argues that any error was harmless because
    Northgate’s disclosures failed even under the old rule. Indeed, if
    Northgate’s disclosures were insufficient under the old rule, the
    district court’s misapplication of the post-amendment standard
    would be harmless. However, we conclude that Northgate’s
    disclosure satisfied the pre-amendment standard. On this basis,
    the district court’s application of the new rule was harmful.
    ¶31 The pre-amendment rule required that a written report
    from retained experts contain
    the subject matter on which the expert is expected
    to testify; the substance of the facts and opinions to
    which the expert is expected to testify; a summary of
    the grounds for each opinion; the qualifications of the
    witness, including a list of all publications
    authored by the witness within the preceding ten
    years; the compensation to be paid for the study
    and testimony; and a listing of any other cases in
    which the witness has testified as an expert at trial
    or by deposition within the preceding four years.
    Utah R. Civ. P. 26(a)(3)(B) (2009) (emphasis added). Thus, while
    the district court excluded the experts’ testimony based on
    insufficient disclosure of complete “data and other information,”
    the applicable rule requires only the disclosure of “a summary of
    the grounds for each opinion.” 
    Id.
     Accordingly, the substantive
    change in the rule altered the quantum and quality of the
    disclosure requirement.
    ¶32 Northgate’s expert disclosure states, “Based on work
    location designations for each Greenfield invoice prepared by or
    under the direction of [Northgate Employee], and associated
    underlying documentation reviewed by the project supervisor,
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    Northgate Village Development v. Orem City
    charges by Greenfield to Northgate for site remediation were
    allocated by pit[.]” The disclosure explains that Expert 1
    “reviewed relevant documents contained in [his] files, met with
    consulting engineers regarding boundaries for [the areas
    outlined in the Clean-Up List] along with associated surface area
    including required excavation ‘angles of repose.’” The disclosure
    then explains how Expert 1 used both “[a] document prepared
    by Greenfield . . . show[ing] a designation for each site
    remediation cost invoice by ‘pit’” and “[a] second allocation
    factor corresponding to surface areas from which material
    volumes were moved.” These are not “cursory” or “vague”
    descriptions as the City argues. See Dahl v. Dahl, 
    2015 UT 79
    ,
    ¶¶ 80–81 (affirming the trial court’s order limiting expert
    testimony where, as grounds for his opinion, the expert cited his
    “education, knowledge, training, and experience”). Instead,
    Expert 1 explained that he used invoices, documents from the
    excavation company, and a surface-area-allocation method to
    calculate costs. It is wholly plausible from a plain reading of the
    report that Expert 1, in forming his opinion, did not rely on the
    “apportionment document” prepared by Northgate Employee—
    the subject of the City’s principle objection. We therefore reject
    the City’s argument and conclude that Expert 1’s report
    sufficiently stated a summary of the grounds Expert 1 applied to
    arrive at his conclusions. 7
    ¶33 Similarly, we conclude that Expert 2’s report also satisfied
    the pre-amendment disclosure standard. The district court
    excluded Expert 2’s testimony based on its incorporation of
    7. The district court also ruled that the experts’ declarations in
    response to the City’s motion to exclude were a form of untimely
    supplementation to the initial disclosures. We need not address
    this because we conclude that the initial disclosures complied
    with the rule. Therefore, no supplementation was necessary
    under the 2009 rule to bring the disclosures into compliance.
    20160408-CA                    16                
    2018 UT App 89
    Northgate Village Development v. Orem City
    Expert 1’s report, which the court had determined was flawed.
    Because we have determined that Expert 1’s disclosure satisfied
    the pre-amendment disclosure standard, Expert 2’s reliance on
    Expert 1’s report does not render Expert 2’s report inadmissible.
    Consequently, we reverse the district court’s ruling excluding
    Expert 2’s testimony.
    ¶34 We conclude that the district court abused its discretion
    by erroneously applying the post-amendment disclosure
    standard. Further, we hold that Northgate’s disclosures satisfied
    the pre-amendment standard.
    CONCLUSION
    ¶35 The district court abused its discretion by basing its
    decision to exclude evidence under rule 401 on a
    misinterpretation of this court’s prior decision in Northgate I. We
    therefore reverse its rule 401 ruling. We also reverse the district
    court’s rule 403 ruling because it applied the incorrect standard.
    Finally, the district court abused its discretion by erroneously
    applying the post-amendment disclosure rules when it excluded
    the testimony of Northgate’s experts. Because Northgate’s
    disclosures were sufficient under the pre-amendment rules, the
    district court’s misapplication of the disclosure standard was not
    harmless. Consequently, we reverse the court’s order excluding
    the testimony of Northgate’s experts.
    ¶36   Reversed and remanded.
    20160408-CA                    17                
    2018 UT App 89