Peoples Natural Gas Co., LLC v. PUC ( 2022 )


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  •            IN THE COMMONWEALTH COURT OF PENNSYLVANIA
    Peoples Natural Gas Company, LLC,              :
    :
    Petitioner        :
    :
    v.                            : No. 1024 C.D. 2020
    : Argued: May 13, 2021
    Public Utility Commission,                     :
    :
    Respondent        :
    BEFORE:       HONORABLE ANNE E. COVEY, Judge
    HONORABLE MICHAEL H. WOJCIK, Judge
    HONORABLE ELLEN CEISLER, Judge
    OPINION NOT REPORTED
    MEMORANDUM OPINION
    BY JUDGE WOJCIK                                                   FILED: April 13, 2022
    Peoples Natural Gas Company, LLC (Company) petitions for review of
    the order of the Pennsylvania Public Utility Commission (PUC), which upheld an
    Administrative Law Judge’s (ALJ) recommended decision to approve the joint
    petition for partial settlement without modification, and to deny the Company’s
    request to reject audit findings 1, 2, 3, and 5. The issues on appeal in these audit
    findings involve interest calculations and segregation of certain gas storage costs.1
    After careful review, we affirm.
    The facts and procedural history of this case, as summarized in the
    PUC’s opinion and order dated September 17, 2020, are as follows. Reproduced
    1
    The Energy Association of Pennsylvania, as amicus curiae, also filed a brief seeking to
    reverse the PUC’s decision to approve audit findings 1 and 2.
    Record (R.R.) at 525a-626a. The proceeding before the PUC consolidated two
    separate proceedings for purposes of hearing and recommended decision: the
    Company’s 2020 annual purchased gas cost filing made on April 1, 2020, pursuant
    to Section 1307(f) of the Public Utility Code (Code), 66 Pa. C.S. §1307(f); and the
    Company’s petition for reconsideration and complaint regarding the PUC’s adoption
    of the Bureau of Audits report dated March 13, 2019. The PUC considered the
    Company’s exceptions, and the PUC Bureau of Investigation and Enforcement’s
    (I&E) replies, to the ALJ’s recommended decision issued on July 29, 2020.
    The parties reached a settlement on all issues except for audit findings
    1, 2, 3, and 5. R.R. at 528a-29a. On June 5, 2020, the Company and I&E2 informed
    the ALJ of the partial settlement except for audit findings 1, 2, 3, and 5, and proposed
    to submit all written testimony and exhibits by stipulation. Therefore, the ALJ
    cancelled the hearings and issued a recommended decision dated July 29, 2020. Id.
    at 529a-31a. In her recommended decision, the ALJ approved the parties’ joint
    petition for partial settlement and denied the Company’s request to reject the PUC
    audit findings 1, 2, 3, and 5. The Company filed exceptions to the recommended
    decision and I&E filed replies. Id. at 531a-32a.
    The audit report reviewed the Company’s purchased gas cost rate over-
    /under-collections for three periods: (1) the 4-month period ended January 31, 2016;
    (2) the 8-month period ended September 30, 2015; and (3) the 12-month period
    ended January 31, 2015. These three audit periods occurred after the closing of the
    acquisition and merger of the former Equitable Gas Company, LLC assets by the
    Company in December 2013 (Equitable acquisition). Relevant to the Equitable
    2
    The Office of Consumer Advocate, the Office of Small Business Advocate, and the
    Pennsylvania Independent Oil & Gas Association participated in the PUC proceeding with I&E as
    Joint Petitioners.
    2
    acquisition, the PUC approved the parties’ agreement that the Company would pay
    for service by the Allegheny Valley Connector (AVC) portion of Equitrans’
    interstate pipeline system to store and move gas through the Company’s system and
    to serve priority one (P-1) transportation and non-priority one (NP-1) transportation
    customers.
    During the three audit periods, the Company calculated and applied
    three main purchased gas cost recovery components through its rider, namely the
    commodity charge, the capacity charge, and the AVC capacity charge. The audit
    report explained each charge as follows: the commodity charge was designed to
    recover the costs of natural gas purchased to serve retail customers; the capacity
    charge was designed to recover demand and capacity costs excluding demand and
    capacity costs on the AVC system; and the AVC capacity charge was designed to
    recover the demand and capacity costs incurred on the AVC system.
    On April 26, 2019, the PUC entered an order adopting the six findings
    in the audit report, noting the Company’s disagreement with the findings that interest
    should be included in the refunds owed to customers, and the finding that the
    Company’s failure to do so might have been unjust and unreasonable.                The
    Company’s objections to the audit findings were consolidated with its annual
    Section 1307(f) proceeding. R.R. at 532a-34a.
    The PUC stated that a public utility has the burden of proof to
    demonstrate by a preponderance of the evidence that a proposed rate is just and
    reasonable. The evidence produced by a utility in meeting its burden must be
    substantial. Section 1307(f) of the Code governs recovery of natural gas costs and
    allows natural gas distribution companies, including the Company, to file tariffs
    reflecting actual and projected increases and decreases in their natural gas costs, with
    3
    tariffs being effective six months from the date of filing. Section 1307 of the Code
    provides that the PUC, after a hearing, shall determine the portion of the Company’s
    natural gas distribution costs in the previous 12-month period that meet the standard
    set forth in Section 1318(a) of the Code, 66 Pa. C.S. §1318(a). Section 1318(a) of
    the Code provides that no rates for a natural gas distribution utility, including the
    Company, shall be deemed just and reasonable unless the PUC finds the utility is
    pursuing a least-cost fuel procurement policy, consistent with the Company’s
    obligation to provide safe, adequate, and reliable service to its customers. The
    PUC’s policy is to encourage settlements. Whole or partial settlements benefit not
    only the named parties directly, but all utility customers indirectly. Despite favoring
    settlements, the PUC does not simply rubber stamp settlements without further
    inquiry. The petitioners have the burden of proving the settlement is in the public
    interest. R.R. at 534a-37a. After review, the PUC approved the parties’ partial
    settlement as to audit findings 4 and 6, and conducted further review of the disputed
    audit findings 1, 2, 3, and 5.3
    The PUC further noted that the Company was, and is, the proponent of
    an order authorizing the collection of purchased gas costs recovered from its
    customers. The audit performed in this case is a statutorily imposed check on the
    accuracy of the cost recovery per Sections 315 and 1307(f)(2) of the Code, 66
    Pa. C.S. §§315 and 1307(f)(2). In this case, the Company had the opportunity to
    challenge the disputed audit findings and to prove the reasonableness of the rates it
    charged. R.R. at 563a-67a.
    3
    The Company also argued that I&E, not the Company, should bear the burden of proof
    in this proceeding, citing NRG Energy, Inc. v. Pennsylvania Public Utility Commission, 
    233 A.3d 936
    , 950-51 (Pa. Cmwlth. 2020), appeal denied, 
    244 A.3d 346
     (Pa. 2021). The PUC found that
    the Company had the burden of proof in this proceeding, from which the Company did not appeal.
    Therefore, the burden of proof issue is not before this Court in this appeal.
    4
    The ALJ identified three basic issues in dispute regarding audit finding
    1: (1) whether the Company should refund ratepayers the sum of $1,497,675, plus
    additional interest at the applicable rate, through an adjustment to the E-Factor of its
    next filing; (2) whether the Company should refund interest to compensate for the
    time between the October 1, 2016 filing and the midpoint of the current
    reconciliation period in which the corrective adjustment would be included; and (3)
    whether the Company should have included material adjustments applicable to prior
    periods in the annual Section 1307(f) filing, rather than being embedded in quarterly
    rate adjustment filings. The audit concluded that the Company did not include
    compensation for the use of ratepayer funds within a prior period adjustment
    calculation as a result of the Company’s filing preparation errors. Specifically,
    during the two annual reconciliation periods ending September 30, 2014, and
    September 30, 2015, the audit determined the Company made filing errors resulting
    in an overstatement of Company expenses in the amount of $8,144,121, and an
    overstatement of Company revenue in the amount of $3,122,637. R.R. at 568a-69a.
    After reviewing the position of the Company and I&E, including
    exceptions and replies, and the ALJ’s recommendation, the PUC affirmed the ALJ’s
    ruling on audit finding 1. The PUC noted that audit finding 1 concerns the errors
    the Company made in presented purchased gas costs and revenues for recovery of
    such costs during the stated audit periods. There is no dispute that the errors
    occurred. The only dispute is whether the Company paid the appropriate amount of
    interest to customers for these errors, and if its use of a quarterly adjustment filing
    to do so was appropriate. The PUC noted there is no penal aspect to its ruling.
    Rather, it calls for the Company’s diligence and adherence to statutory requirements
    in its calculation and recovery of gas costs from its customers. R.R. at 586a-87a.
    5
    The PUC found that the ALJ correctly determined that the Company
    did not include compensation for the use of ratepayer funds within a prior period
    adjustment calculation, which resulted in an overstatement of Company revenue and
    expenses. Although the Company included a prior period adjustment in a filing
    effective October 1, 2016, the Company failed to include additional interest for the
    use of ratepayer funds for additional periods, February 1, 2014, through September
    30, 2015. The PUC agreed that the burden to calculate and charge reasonable rates
    falls on the Company. The PUC also agreed that the Company should not benefit
    from its own multiple and material errors, and it should not be permitted to charge
    interest to ratepayers on under-collected amounts resulting from the Company’s
    errors. The PUC agreed with the ALJ that the Company should have included
    $394,351 in interest as recommended by the audit when it calculated annual interest
    for the periods ended September 2014 and September 2015. The refund sum of
    $1,497,675 is intended to compensate ratepayers for over-recovery of gas costs in
    April 2014, July 2014, November 2014, and February 2015. The Company made
    the mistake and failed to timely capture the error. R.R. at 587a-88a.
    The PUC also held that the statutory scheme for gas cost recovery is
    designed to allow for an orderly review of such cost recovery through a detailed and
    careful audit process. Quarterly adjustment filings are not subject to the same
    detailed review, and, therefore, it was not appropriate for the Company to include
    these proposed adjustments in quarterly adjustment filings. R.R. at 588a-89a.
    Audit finding 2 concluded that the Company did not properly reconcile
    the AVC capacity charge E-Factor balance from inception. AVC capacity costs are
    charges to the Company for capacity and delivery on the AVC portion of Equitrans’
    interstate pipeline system. As part of the Equitable acquisition, the Company
    6
    transferred these assets to Equitable as partial payment. One of the terms of the
    Equitable acquisition was that these costs be recovered post-transfer the same way
    the costs were recovered pre-transfer. Therefore, the Equitable acquisition parties
    agreed that the AVC costs would not be included in other gas recovery costs, and
    would be assigned to customer classes in the same way that they were recovered
    under base rates. Per the Company’s approved tariff, the AVC capacity charge is
    calculated and reconciled separately from the traditional capacity charge. The audit
    determined the Company did not prepare annual reconciliations for the AVC
    capacity charge, although it tracked the charge monthly including over-/under-
    collections and on quarterly filings. Based on these findings, the audit recommended
    that the Company recognize the AVC capacity charge E-Factor balance totaling
    $4,153,808 as of September 30, 2015, and reconcile, with applicable interest, all
    subsequent periods as of its next annual filing. R.R. at 589a-90a.
    After reviewing the position of the Company and I&E, including
    exceptions and replies, and the ALJ’s recommendation, the PUC affirmed the ALJ’s
    ruling on audit finding 2. The PUC affirmed audit finding 2, which found that the
    Company’s calculation and reconciliation, without interest, of the over-collection
    amount of the AVC capacity charge for the period between December 2013 and
    September 2014, and between October 2014 and September 2015, was incorrect.
    The PUC also found that the Company was responsible for $4,153,808 in AVC
    capacity charge E-Factor balances, including interest.       The PUC specifically
    reviewed the applicable tariff document, and concluded that it provided helpful
    background, but was of no consequence to its decision, because the tariff was silent
    on the issue of interest to be applied to AVC capacity charges.
    7
    The PUC first decided that AVC capacity costs are “gas costs” and not
    “capacity costs” as defined under Sections 1307, 1317, and 1318 of the Code. Gas
    costs are subject to interest per the Code. Then, the PUC found the Company’s
    reliance on the word “may” in Section 1307(f)(1) was misplaced. The PUC opined
    that this Section provided discretion to the Company to file a tariff reflecting actual
    and projected gas costs, and to recover these costs under automatic adjustment, but
    not the ability to elect which gas costs will be recovered under Section 1307(f)
    annual rate proceedings, and which gas costs would not. The PUC found this action
    was not retroactive recovery of AVC capacity costs, prohibited by Cheltenham &
    Abington Sewerage Company v. Pennsylvania Public Utility Commission, 
    25 A.2d 334
     (Pa. 1942). The PUC found this adjustment necessary because the Company
    should have applied interest to the over-/under-collection since inception of the AVC
    capacity charge, and it did not do so. R.R. at 601a-05a.
    Audit finding 3 concluded that the Company mishandled a storage
    adjustment resulting from a pipeline retainage error.         Specifically, the audit
    determined that the Company overstated gas costs of $1,611,390 for the period
    between December 2013 and July 2015. Following the Equitable acquisition in
    2013, the Company entered into a contract with Equitrans for transmission and gas
    storage services on the AVC system. The audit determined that Equitrans notified
    the Company on August 31, 2015, that double-counting of volumes on the AVC
    system caused too much gas to be retained per the applicable tariff. To correct this
    error, Equitrans increased the Company’s available gas storage, after which the
    Company made internal adjustments to gas storage records and costs. Based on
    these findings, the audit recommended that the Company refund $144,186, plus
    interest at the applicable rate, through an E-Factor adjustment at its next annual
    8
    filing, and that the Company develop and implement internal controls for preparation
    and review of its annual filings. R.R. at 606a-09a.
    The ALJ explained that although the initial cause of the problem
    requiring the adjustment was out of the Company’s control, the Company did have
    control over how it handled the adjustment. The way that the Company chose to
    deal with the adjustment was to net adjustments to gas storage costs together, which
    decreases transparency and can reduce accurate review of interest calculations, and
    then the Company used funds that should have been credited to ratepayers without
    paying interest. After reviewing the position of the Company and I&E, including
    exceptions and replies, and the ALJ’s recommendation, the PUC affirmed the ALJ’s
    ruling on audit finding 3. The PUC affirmed that the Company was not accused of
    overstating the cost of gas withdrawn or of purchasing additional supply. However,
    the Company overstated gas costs, and during each month of the error, it was
    recovering excess retainer charges from customers. Because a portion of the error
    was relative to a prior period, the Company should have made a prior period
    adjustment with interest amounting to $144,186. The Company’s failure to notice
    the error caused an overstatement of gas costs, which must be corrected with interest.
    R.R. at 610a-14a.
    Audit finding 5 concluded that the Company improperly booked gas
    stored for its retail customers with gas stored for its NP-1 storage program. During
    the Company’s annual filing in 2014, the Company proposed to continue releasing
    storage capacity to NP-1 suppliers by purchasing a predetermined amount of gas to
    inject into storage in the summer based on nominations from NP-1 suppliers. NP-1
    suppliers would then purchase their nominated gas throughout the winter. The
    Company did not separately record storage activity of retail and NP-1 customers.
    9
    Instead, the Company used last-in, first-out (LIFO) to value its gas in storage during
    the audit period.    The audit stated the Company should segregate its NP-1
    transportation activity from its retail customer storage activity to prevent inaccurate
    recovery through the Company’s rates. The audit further stated when the Company
    used LIFO without excluding NP-1 activity, it could improperly impact the creation
    or use of LIFO layers. The ALJ agreed that in order to eliminate the commingling
    of costs for gas stored for NP-1 and retail customers, the Company must segregate
    the accounting of purchased gas in storage for these customer classes. If the
    Company segregated these costs, then the least expensive purchased gas can be
    segregated for future use by retail customers, in support of a least-cost gas
    purchasing strategy required by the Code. R.R. at 615a-16a.
    After reviewing the position of the Company and I&E, including
    exceptions and replies, and the ALJ’s recommendation, the PUC affirmed the ALJ’s
    ruling on audit finding 5. The PUC found that the Company’s internal control to
    segregate storage gas by customer class is to ensure that there is reduced potential
    of cross-subsidization of costs and to ensure that the Company is complying with a
    least-cost gas purchasing strategy. The PUC acknowledged that the NP-1 sales
    program is not a traditional tariffed storage service, and that the Company maintains
    ownership of gas until it is sold. However, the PUC found that the Company’s NP-
    1 program remains a sales service and not a storage service. The PUC found that
    the Company should separate purchases and storage activity for NP-1 customers
    because the specific volume of gas necessary to meet the needs of the NP-1 sales
    10
    program is known ahead of time, prior to the start of the storage injection season.
    R.R. at 622a-24a. The Company then appealed of the PUC’s order to this Court.4
    4
    Our standard of review of a PUC order is limited to determining whether a constitutional
    violation or error in PUC procedure has occurred, the decision is in accordance with the law, and
    the necessary findings of fact are supported by substantial evidence. PECO Energy Company v.
    Pennsylvania Public Utility Commission, 
    791 A.2d 1155
    , 1160 (Pa. 2002). Additionally, this
    Court has observed:
    We recognize that the [PUC’s] “interpretations of the Code
    . . . and its own regulations are entitled to great deference and should
    not be reversed unless clearly erroneous.” Energy Conservation
    Council of Pennsylvania v. Pennsylvania Public Utility
    Commission, 
    995 A.2d 465
    , 478 (Pa. Cmwlth. 2010) (citing
    Popowsky v. Pennsylvania Public Utility Commission, 
    706 A.2d 1197
    , 1203 (Pa. 1997) (Popowsky I)). Our Supreme Court has
    consistently instructed that this Court should not “‘substitute its
    judgment for that of the [PUC] when substantial evidence supports
    the [PUC’s] decision on a matter within the [PUC’s] expertise,’ nor
    should it indulge in the process of weighing evidence and resolving
    conflicting testimony.” Id. at 478 (quoting Popowsky I, 706 A.2d at
    1201). Similarly, because the [PUC] is “the administrative body
    charged with implementing the Competition Act [Electricity
    Generation Consumer Choice and Competition Act (Competition
    Act), 65 Pa. C.S. §§2801-2815], [it] is entitled to substantial
    deference in the performance of its duties, and the [PUC’s]
    interpretation of the Competition Act should not be overturned
    unless it is clear that such construction is erroneous.” George v.
    Pennsylvania Public Utility Commission, 
    735 A.2d 1282
    , 1288 (Pa.
    Cmwlth. 1999).            However, when statutory language is
    unambiguous, we will not give the [PUC] discretion in its
    interpretation. “‘[W]here [the] statutory language is clear, such
    interpretive discretion ends and the [PUC] must abide by the
    statute.’” Dauphin County Industrial Development Authority v.
    Pennsylvania Public Utility Commission, 
    123 A.3d 1124
    , 1133 (Pa.
    Cmwlth. 2015) (quoting Pennsylvania Power Company v.
    Pennsylvania Public Utility Commission, 
    932 A.2d 300
    , 306 (Pa.
    Cmwlth. 2007)).
    (Footnote continued on next page…)
    11
    On appeal, the Company asserts that the PUC erred as a matter of law,
    abused its discretion, or its opinion and order lacks substantial evidence when it
    approved audit findings 1, 2, 3, and 5. We will address each of these claims in turn.
    As to audit finding 1, the Company argues that the PUC erred as a
    matter of law or abused its discretion when it failed to properly calculate interest
    under audit finding 1. The Company offers the following chart with its positions on
    each component of the PUC’s interest calculation.
    Audit Issue                         Amount          Company Position
    Offsetting Interest on PGC                         $635,020       Interest offset for
    [Purchased Gas Cost] Revenue                                      Overstated Revenue
    Reductions Against Gas Cost                                       is Appropriate
    Overstatement
    Credit for Interest Already Provided to            $394,351       Provided to
    Customers by [the Company] from                                   customers beginning
    When The Error Occurred to the                                    in the 10/1/2016
    Midpoint of the Period when Interest                              Quarterly Filing.
    Would Have Been Refunded If There
    Had Not Been an Error
    Nevertheless, when a statutory scheme is technically
    complex, or “[t]he decision at issue[ ] involve[s] complex financial
    determinations and weighing and interpreting statistical and
    economic evidence,” the [PUC’s] expertise in such matters allows
    for “broad discretion” in its interpretations and methods.
    McCloskey v. Pennsylvania Public Utility Commission, 
    225 A.3d 192
    , 202-03 (Pa. Cmwlth. 2020) (internal quotations omitted); see
    also Coalition for Affordable Utility Services & Energy Efficiency
    in Pennsylvania v. Pennsylvania Public Utility Commission, 
    120 A.3d 1087
    , 1095 (Pa. Cmwlth. 2015).
    NRG Energy, Inc., 233 A.3d at 948-49.
    12
    Interest Provided to Customers in            $468,304    Provided to
    October 1, 2019 Filing for Remainder of                  customers beginning
    Interest Due to Compensate Customers                     in the 10/1/2019
    From When the Error Occurred to the                      Quarterly Filing.
    Midpoint (March 2017) of When the
    Corrections Were Placed in the
    Quarterly Filing (October 2016)
    Adjustment Proposed by Audits               $1,497,675
    R.R. at 570a.
    The Company agrees that it made errors in gas cost filings that
    overstated both gas costs and revenues for recovery of gas costs, and that the errors
    were unintentional.    The dispute concerns how to calculate interest on the
    corrections. The Company contends that the PUC’s failure to include interest on
    under-collections contravenes the express language in Section 1307(f)(5) of the
    Code, which states:
    (f) Recovery of natural gas costs.--
    ****
    (5) The [PUC], after hearing, shall determine the portion
    of the company’s natural gas distribution actual natural
    gas costs in the previous 12-month period which meet the
    standards set out in section 1318. The [PUC] shall, by
    order, direct each natural gas distribution company subject
    to this subsection to refund to its customers gas revenues
    collected pursuant to paragraph (2) which exceed the
    amount of actual natural gas costs incurred consistent with
    the standards in section 1318 and to recover from its
    customers any amount by which the actual natural gas
    costs, which have been incurred consistent with the
    standards in section 1318, exceed the revenues collected
    pursuant to paragraph (2). Absent good reason to the
    contrary, the [PUC] shall issue its order within six months
    following the filing of the statement described in
    paragraph (3). Refunds to customers shall be made with
    and recoveries from customers shall include interest at the
    13
    prime rate for commercial borrowing in effect 60 days
    prior to the tariff filing made under paragraph (1) and as
    reported in a publicly available source identified by the
    [PUC] or at an interest rate which may be established by
    the [PUC] by regulation. Nothing under this paragraph
    shall limit the applicability of a defense, principle or
    doctrine which would prohibit the [PUC’s] inquiry into
    matters that were decided finally in the [PUC’s] order
    issued under paragraph (2).
    66 Pa. C.S. §1307(f)(5) (emphasis added).
    The Company asserts that because the conjunctive “and” instead of the
    disjunctive “or” is used in this section, the PUC must apply interest to both refunds
    to and recoveries from customers. In the alternative, the Company admits that if the
    PUC has discretion to determine whether interest should apply to all gas cost
    components under Dominion Retail, Inc. v. Pennsylvania Public Utility Commission,
    
    831 A.2d 810
    , 814 (Pa. Cmwlth. 2003), the PUC abused its discretion when it
    applied interest to over-collections but not under-collections.
    The Company further argues that it provided $394,351 of interest to
    customers beginning October 1, 2016. This interest was calculated based on when
    the Company discovered and corrected the errors. The Company disputes I&E’s
    argument that this interest calculation is unrelated to the over-collection during the
    overstatement of gas cost errors made, and instead is the interest the Company
    should have included had it correctly calculated interest for the annual periods
    ending September 2014 and September 2015.
    Amicus Energy Association of Pennsylvania (Energy Association)
    provides background on the calculation of gas costs and the audit process. Energy
    Association is concerned that the PUC’s asymmetrical approach between interest
    paid to customers and interest collected from customers will have broad and adverse
    impacts on utility members of the Energy Association. Energy Association argues
    14
    that the PUC’s reasoning that the Company “should not benefit from its own
    multiple and material errors” is erroneous and unsupported by substantial evidence.
    R.R. at 587a. Energy Association further argues that the PUC’s action is inconsistent
    with the history and purpose of automatic adjustment clauses, which focus on
    providing customers with timely information about costs and rates.           Energy
    Association also argues that because the development and administration of
    purchased gas rate tariffs and mechanisms is complicated, errors can and do occur.
    Here, Energy Association contends that the Company’s errors were computational
    and unintentional, and therefore the exclusion of interest from under-collections is
    disproportionate to the nature of the Company’s errors. Further, Energy Association
    argues that the PUC made no finding that the Company’s errors were the result of
    failure to exercise reasonable managerial prudence, and therefore are distinguishable
    from the factors in Equitable Gas Company v. Pennsylvania Public Utility
    Commission, 
    526 A.2d 823
     (Pa. Cmwlth. 1987).
    The PUC responds that it properly adopted audit finding 1, which
    concluded the Company owed $1,497,675 in interest to its customers due to over-
    collection of gas costs resulting from multiple errors made by the Company. The
    PUC responds that the Company is not entitled to offset interest that it claims was
    already paid to its customers, because this interest was for issues or time frames
    other than those associated with this audit. Specifically, for the two annual periods
    ending September 2014 and September 2015, the audit determined that the Company
    made several filing preparation errors resulting in an overstatement of expenses
    totaling $8,144,121 refunded to ratepayers, and an overstatement of revenues
    totaling $3,122,637 recovered from ratepayers. As such, the audit calculated that
    the Company must pay $1,497,675 in interest to its customers due to the improper
    15
    use of customer funds through over-collection. That amount should have been
    included with the Company’s October 1, 2016 E-Factor adjustment, but it was not.
    The PUC further responds to the Company’s assertion that Section
    1307(f)(5) of the Code requires interest for over-collections and under-collections.
    The PUC argues that audit finding 1 concerns errors the Company made in
    presenting costs and revenues, whether the Company paid the appropriate amount
    of interest, and whether its use of quarterly adjustment filings to do so was
    appropriate. The PUC argues that it is the Company’s duty to adhere to statutory
    requirements, and to calculate and recover reasonable gas costs from its customers,
    citing Pennsylvania Power Company v. Pennsylvania Public Utility Commission,
    
    561 A.2d 43
     (Pa. Cmwlth. 1989). The PUC argues that substantial evidence supports
    the audit’s finding that the Company failed to include additional interest for the
    period of February 1, 2014, through September 30, 2015, which is what the proposed
    interest charge is intended to address.
    The PUC then addresses the three components that make up the
    $1,497,675 and explains why the Company should not be entitled to offset each
    component. The PUC asserts that the Company is not entitled to offset total interest
    by $635,020 for interest the Company claims it is owed from customers for under-
    collection. Although Section 1307(f)(5) of the Code allows for interest when
    recovery of under-collections is necessary as part of the normal reconciliation
    process, the Company should not be permitted to benefit by collecting interest from
    ratepayers caused by calculation errors made by the Company. The PUC cites the
    testimony of the PUC’s lead auditor, who testified that it would be unethical for a
    utility to benefit from self-inflicted errors, when the motivation behind Section
    1307(f)(5) is to fairly compensate parties for unforeseen changes but not for the
    16
    utility’s erroneous calculations. R.R. at 198a-99a. The PUC further responds that
    the Company has the burden to calculate and charge reasonable rates, as it, and not
    the customer, has the data to calculate reasonable rates. It was incumbent on the
    Company to use accurate data, and it failed to exercise proper care in this calculation.
    The PUC next addresses the Company’s claim that $394,351 should be
    used to offset the total interest owed. The PUC states that the $394,351 represents
    the correction to the interest that the Company miscalculated for the annual periods
    ending September 2014, and September 2015. The PUC asserts that the Company
    made the mistake in its calculations, failed to capture the error in a timely manner,
    and only began its refund to ratepayers beginning in October 2016. The PUC also
    responds to the Company’s argument it is entitled to a credit for $468,304 in interest
    the Company already paid. The PUC cites the testimony of the PUC’s lead auditor
    that it would be reasonable for the Company to take credit for this amount it claims
    to have already included in its rate adjustment effective October 1, 2016, subject to
    review at the next financial audit to verify completion. R.R. at 244a-45a. The PUC
    argues that the Company’s failure to include interest on refunds to customers was
    unjust and unreasonable. Therefore, the PUC argues that requiring the Company to
    apply interest is in the public interest, citing Sections 1307(d) and 1312(a) of the
    Code, 66 Pa. C.S §§1307(d), 1312(a). The PUC contends that this audit position is
    not new. The PUC further contends that the Company’s attempt to include these
    major corrective adjustments in its quarterly filings is improper, can result in
    confusion and an undetected over-recovery of gas costs from customers for extended
    periods. The PUC further argues the Company is not entitled to an offset for interest
    the Company claims its customers owe for under-collection, because such interest
    would unjustly allow the Company to benefit from its own errors.
    17
    As to audit finding 2, the Company argues that the PUC erred as a
    matter of law when it adopted audit finding 2, and concluded, contrary to the
    Company’s approved tariff, that it should be required to retroactively pay interest on
    over-and under-collections of AVC costs. The Company summarized the history of
    the AVC charge, which resulted from the Equitable acquisition in 2013. The parties
    to the Equitable acquisition agreed to a number of special ratemaking conventions
    applicable to AVC assets, including that these costs be recovered through a separate
    charge that would be reconciled without interest. The Company points to certain
    defined terms in the approved tariff, the “DOU” and the “AVCOU,”5 especially to a
    footnote that clearly delineates that interest be applied only to DOU demand or
    capacity over-/under-collections, which excludes AVC charges. The Company
    argues that the AVC capacity charge is a different charge that is not part of the DOU.
    As such, it is included in the definition of AVCOU, which does not specifically
    reference interest. The Company also argues that no interest is owed because the
    parties failed to raise interest on AVC charges in six prior annual filing proceedings
    since the Equitable acquisition in 2013. The Company further argues that the PUC
    unlawfully ordered the retroactive application of interest on AVC capacity charges.
    The Company argues that the PUC unlawfully revised the Company’s tariff to allow
    interest on AVC capacity charges, which were excluded from interest in the tariff.
    The Company argues utility tariffs have the force and effect of law binding on all
    parties, citing Cheltenham & Abington Sewerage Company, 25 A.2d at 336-39.
    5
    In the tariff, “DOU” is defined as experienced net over-collection or under-collection of
    demand or capacity cost (excluding the AVC capacity charges) or purchased gas. Footnote 1 to
    the DOU definition provides that interest will be applied in accordance with applicable law.
    “AVCOU” is defined as experienced net over-collection or under-collection of AVC capacity
    costs, and there is no footnote delineating interest on AVCOU costs. See R.R. at 285a-86a, 596a-
    97a.
    18
    Amicus Energy Association also argues the PUC unlawfully ignored the
    plain language of the tariff when it imposed interest on AVC capacity charges.
    Energy Association provided background on the use of tariffs, and argued that it is
    well established that tariffs have the force and effect of law, citing Brockway Glass
    v. Pennsylvania Public Utility Commission, 
    437 A.2d 1067
     (Pa. Cmwlth. 1982).
    Energy Association disagrees with the PUC finding that AVC capacity charge was
    a gas cost, and, as such, over-collections received from ratepayers must be
    reconciled with interest under Section 1307(f) of the Code. Energy Association
    argues that in doing so, the PUC ignored the plain language of the tariff. Energy
    Association also disagrees with the PUC finding that the tariff was useful for
    background information but was of no consequence in the current proceeding.
    Energy Association argues that the tariff helps provide a nuanced understanding of
    the AVC capacity charge and how it should be treated.
    The PUC responds that its decision to adopt audit finding 2 was in
    accordance with the law and supported by substantial evidence.            The PUC
    summarizes how the AVC capacity charge originated with the Equitable acquisition.
    The PUC agrees that the Equitable parties agreed that the AVC capacity charges
    would not be included with traditional capacity charges, as indicated in the tariff.
    However, the PUC argues that because the charge is ultimately subject to review as
    a gas cost under Section 1307(f)(5), it must include interest. The PUC points to the
    testimony of its lead auditor, who stated that the Company’s reconciliation was
    flawed because it did not include these charges in its annual reconciliations, but
    tracked them monthly, and included the charges on its quarterly reconciliations. The
    audit found that the Company owed $4,153,808 in interest as of September 2015.
    The PUC relies on Sections 1307, 1317 and 1318 of the Code to support its position
    19
    that AVC capacity charges are gas costs under the Code. Capacity costs are typically
    included in gas costs for recovery under Section 1307(f) of the Code, because
    capacity costs are a category of direct costs the Company pays for the purchase and
    delivery of natural gas to its customers. The Company acknowledges that the AVC
    capacity costs are capacity costs, therefore the PUC found that they are clearly gas
    costs. The fact that the tariff permits the AVC capacity charge to be calculated and
    reconciled differently does not change the nature of these costs. As a gas cost, the
    AVC capacity charge is subject to Section 1307(f) of the Code, which requires
    interest to be applied.
    The PUC agrees with the Company that the PUC has discretion to
    determine which charges will be considered gas costs, which is what it did in this
    proceeding. The PUC argues that the Company’s reliance on Dominion Retail, Inc.,
    
    831 A.2d at 814
    , and National Fuel Gas Distribution Corporation v. Pennsylvania
    Public Utility Commission, 
    587 A.2d 54
    , 61-62 (Pa. Cmwlth. 1991), is misplaced.
    In these cases, the Court upheld the PUC’s analysis that certain costs were not gas
    costs, and, thus, were not subject to reconciliation and interest under Section
    1307(f)(5) of the Code. The PUC argues that because the AVC capacity charge is a
    gas cost subject to reconciliation and interest under Section 1307(f)(5), the language
    of the tariff is irrelevant. Alternatively, the PUC argues the tariff itself does not
    expressly include or exclude interest in AVC capacity charges. The PUC argues that
    the tariff’s silence on the issue is not sufficient to demonstrate the AVC capacity
    charge should exclude interest, especially when such interest is required by statute.
    The PUC also contends that the inclusion of this interest is not impermissible
    retroactive application. As found in the audit, the Company’s failure to include
    interest to the over-/under-collection on AVC capacity charges dates back to its
    20
    inception. This finding corrects the Company’s mistake back to when the Company
    began making it.
    As to audit finding 3, the Company argues that the PUC abused its
    discretion when it adopted audit finding 3 and found that the Company must pay
    $144,186, plus applicable interest, to customers due to an error made by Equitrans,
    not the Company. The Company summarizes audit finding 3 as related to a refund
    made by Equitrans to the Company for double-charging retainage for gas transported
    by the Company on Equitrans facilities. Because the Company must pay for retained
    gas, its cost is recovered in charges to customers. Equitrans double-charged the
    Company for 20 months. When it discovered the error, Equitrans corrected it by
    reducing an adjustment it was also making for storage losses. On receiving the
    adjusted balance, the Company reduced its gas costs when it received the offset from
    Equitrans.
    The Company objects to the PUC’s finding that it should go back to
    each month a retainage error was charged to the Company and recalculate the interest
    owed on over-/under-collections. The Company rejects the PUC’s finding that it
    failed to notice Equitrans’ error and therefore must pay interest when the errors
    occurred, because the Company did not have use of any customer funds related to
    the error during the error period. The Company argues that this finding unfairly
    punishes the Company for the error of a third party. In addition, the Company
    reduced customer costs immediately upon receipt of the correction.
    The PUC responds that it properly adopted audit finding 3 due to the
    Company’s failure to detect and properly adjust for Equitrans’ errors. Specifically,
    the Company overstated gas costs of $1,611,390 over the 20-month period from
    December 2013 to July 2015. On August 31, 2015, Equitrans notified the Company
    21
    that double-counting of volumes on both the AVC transmission system and the AVC
    storage system caused too much gas to be retained per Equitrans’ tariff. To correct
    this error, Equitrans increased the Company’s available gas storage, and the
    Company made internal adjusting entries to its gas in storage and reported gas costs.
    The audit found reported gas costs were handled incorrectly. The first adjustment
    was a netted adjustment that included a refund to ratepayers of $1,272,989 and a
    recovery of $664,755, resulting in a reduction of gas costs in August 2015 of
    $608,234. The second adjustment was a refund to ratepayers of $338,393 to correct
    pipeline retainer errors for the remaining seven-month period from January 2015 to
    July 2015. The Company included the full refund to ratepayers of $1,611,390 to
    correct for the 20-month retainage error within the 2-month period of July 2015 to
    September 2015, which falls within the 12-month reconciliation period of October
    2014 to September 2015. The Company’s full refund was incorrect because the
    portion of the total retainage error for the 10-month period between December 2013
    to September 2014 should have been an adjustment to a prior period.
    The PUC argues that at the time it made the adjustment, the Company
    had the opportunity to correct the monthly activity within the current reconciliation
    period from October 2014 to September 2015, prior to applying interest to the over-
    /under-collection. Upon receiving the net adjustment from Equitrans, the Company
    reduced its gas costs charged to customers in an effort to reflect the correction of the
    retainage errors previously charged to customers. The PUC argues, however, that
    the Company must go back to each month in which the retainage error was charged
    to customers, restate the gas costs, and recalculate over-/under-collections and
    interest.   Accordingly, the PUC asserts the Company must pay its customers
    additional interest of $144,186.
    22
    The PUC responds to the Company’s argument that it should not be
    punished for Equitrans’ error, and that the Company did not have use of customer
    funds triggering interest. The PUC affirms that it did not accuse the Company of
    overstating the cost of gas withdrawn or of purchasing additional supply. Instead,
    gas costs were overstated because in each of the twenty months during the error,
    excess retainage charges were being recovered from customers.               Therefore,
    adjustments to the prior period from December 2013 to September 2014, including
    appropriate interest, should have been made, but were not. The PUC rejected the
    Company’s method of making adjustments, which was to net the adjustments
    together, which decreased transparency and potentially reduced the accuracy of
    interest calculations. The Company then used funds that should have been credited
    to ratepayers without paying interest on those funds. The PUC asserts that the
    Company’s failure to notice and fix the error in a timely manner caused a monthly
    overstatement of gas costs, which must be corrected with interest.
    As to audit finding 5, the Company argues that the PUC erred as a
    matter of law when it adopted audit finding 5 and concluded, contrary to the
    approved tariff, that the Company should develop accounting procedures to account
    for NP-1 transportation gas separately from sales gas, and to make a refund to sales
    customers based on a retroactive adjustment. The Company pointed to its tariff
    under which its tariffed sales program for NP-1 suppliers requires the Company to
    purchase gas at a certain time of the year and then sell it to NP-1 suppliers at a price
    set forth in the tariff. The costs and revenues for this service are included in the
    Company’s Section 1307(f) reconciliation. As part of this reconciliation, the audit
    recommended that the Company segregate gas purchased for NP-1 suppliers from
    gas purchased for sales customers. The audit found that the least-cost purchased gas
    23
    should be segregated for sales customers under Section 1307(f) reconciliation, and
    that costs for purchased gas for NP-1 customers should not be included for recovery
    in Section 1307(f) rates. The audit recommended that the Company go back and
    separately calculate any effect on retail sales gas pricing if the NP-1 gas was
    segregated, and determine whether a refund and interest should be provided to
    Section 1307(f) sales customers.
    The Company argues that the PUC erred when it issued this directive
    because the tariff provides no basis to segregate the lowest cost gas for Section
    1307(f) sales customers or for awarding refunds with interest. The Company points
    out that no parties alleged that the Company failed to follow the express terms of its
    tariff. The Company argues that the adoption of audit finding 5 retroactively revises
    the terms of the NP-1 tariff program, and, thus, is an error of law.
    The PUC responds that its adoption of audit finding 5 was appropriate
    to ensure least-cost gas procurement required by the Code. The PUC provides
    background on the Company’s 2010 base rate case, where the Company released
    storage capacity to NP-1 suppliers through its tariff. After the Equitable acquisition
    in 2013, the Company no longer owned the storage services that it used to offer this
    service. During the Company’s Section 1307(f) proceeding in 2014, the Company
    proposed to offer this benefit to NP-1 suppliers, but in a different manner. Under
    the new program, the Company purchased a predetermined amount of gas to inject
    into storage in the summer months based on nomination forms from NP-1 suppliers.
    NP-1 suppliers were then obligated to purchase the nominated gas through the winter
    withdrawal season. The PUC recommended that the Company segregate its NP-1
    transportation storage activity from the retail sales customers’ storage activity for
    accounting purposes, and to prevent inaccurate recovery through its rates. The
    24
    Company was using LIFO to value its gas in storage during this audit period. The
    PUC contends that when the Company used LIFO to value the gas in storage without
    excluding NP-1 storage activity first, it could improperly impact the creation or use
    of LIFO layers. The PUC recommended segregation of the gas storage costs for
    these two different classes of customers, after which the Company should calculate
    the effect on retail gas storage pricing, and any refund owed should include interest.
    The PUC also responds to the Company’s argument that such
    segregation is not included in its tariff, and that the segregation of gas costs will
    require the terms of the tariff to be changed. The PUC denies that segregation will
    cause the terms of the tariff to be changed and notes that the PUC did not conclude
    that the Company was in violation of its tariff. The PUC explains the purpose of
    this change to internal control is to ensure that there is reduced potential for cross-
    subsidization of costs or possible inflation of the average cost of purchased gas.
    Segregation of costs is necessary to ensure that storage costs associated with NP-1
    sales are not inadvertently recovered through the Company’s regular rates, and also
    to ensure that the Company is complying with a least-cost gas purchasing strategy.
    Specifically, if the inclusion of gas purchased to store for the NP-1 program created
    a higher LIFO layer, which would then be used for sales customers, that could
    inappropriately increase costs for ratepayers. The PUC further responds that audit
    finding 5 is not an impermissible retroactive adjustment to the Company’s tariff.
    The PUC contends that during an audit, if potential for cross-subsidization of costs
    or possible inflation of average gas costs is discovered, the PUC can properly request
    the Company to look back over the audit period to determine whether these things
    occurred.
    25
    With the applicable standard of review in mind, which requires this
    Court to give “great deference” to the PUC’s interpretation of the Code regulations,
    we will overturn the PUC’s interpretation only if it is “clearly erroneous.” NRG
    Energy, Inc., 233 A.3d at 948-49. After careful review of audit findings 1, 2, 3, and
    5, we discern no error in the PUC’s interpretation of Sections 1307 and 1318 of the
    Code as applied to these audit findings. The adjustments made under the Section
    1307 reconciliation process are subject to review under Section 1318, by the plain
    language of Section 1307(f)(5), so that the PUC may determine whether those
    adjustments are “just and reasonable” for ratepayers.
    As our Court explained in Dominion Retail, Inc., 
    831 A.2d at 813
    ,
    “Section 1307(f) [of the Code] provides for the automatic adjustment of rates
    associated with natural gas costs incurred.” After approval of the utility’s estimate
    in its Section 1307(f) adjustment, the PUC performs an annual “audit of the
    experienced costs compared to the amount collected over the past 12 months.” 
    Id.
    This annual audit “permits experienced over- or under-collections attributable to the
    automatic rate adjustment mechanism to be reconciled by the utility and its
    customers.” 
    Id. at 813-14
    . Our Court further explained that through the Section
    1307(f) reconciliation process “the PUC insures that a utility is made whole while
    protecting the ratepayer from overcharges resulting from the inaccuracies of the
    utility’s estimates.” 
    Id. at 814
    . We recognized that the PUC “is afforded broad
    discretion in determining which costs are natural gas costs for purposes of recovery
    under Section 1307(f).” 
    Id.
     We have held that a utility has no basis for appellate
    relief because the PUC did not accept the utility’s excuses for its accounting
    decisions. Equitable Gas Company, 
    526 A.2d at 828
    . We may not substitute our
    judgment for the PUC’s or reweigh evidence. 
    Id.
    26
    As to audit finding 1, the PUC did not err in requiring the Company to
    refund $1,497,675, plus applicable interest, through an adjustment to the E-factor at
    the Company’s next filing, when the adjustment was necessitated by the Company’s
    admitted filing errors. We agree with the PUC that this adjustment is not punitive,
    but is meant to make the Company accountable for accurate filings to ensure just
    and reasonable rates under Section 1318 of the Code. We further find no errors in
    the additional adjustments ordered by the PUC in audit finding 1.
    As to audit finding 2, the PUC did not err in requiring the Company to
    adjust its AVC capacity charge, plus applicable interest, which was caused by the
    Company’s failure to reconcile its AVC capacity charge annually, as required by its
    tariff. The PUC did not err when it determined the AVC capacity charge was subject
    to adjustment as a gas cost, as defined by Sections 1307, 1317, and 1318 of the Code,
    and, thus, subject to interest.
    As to audit finding 3, the PUC did not err in requiring the Company to
    adjust its gas costs of $1,611,390 for the period between December 2013 and July
    2015, thus requiring the Company to pay interest in the amount of $144,186.
    Although the gas retainage cost adjustment was initially caused by a third party,
    Equitrans, the Company failed to properly account for these charges.
    As to audit finding 5, the PUC did not err in requiring the Company to
    properly account for gas sales in its NP-1 program, to ensure that NP-1 customers
    received reasonable and just rates under the Company’s “least[-]cost fuel
    procurement policy” as required by Section 1318(a) of the Code.
    27
    For all these reasons, we affirm the PUC’s order.
    MICHAEL H. WOJCIK, Judge
    Judge Fizzano Cannon did not participate in the decision of this case.
    28
    IN THE COMMONWEALTH COURT OF PENNSYLVANIA
    Peoples Natural Gas Company, LLC,       :
    :
    Petitioner      :
    :
    v.                        : No. 1024 C.D. 2020
    :
    Public Utility Commission,              :
    :
    Respondent      :
    ORDER
    AND NOW, this 13th day of April, 2022, the order of the Pennsylvania
    Public Utility Commission dated September 17, 2020, is AFFIRMED.
    __________________________________
    MICHAEL H. WOJCIK, Judge