Peter Adams v. Entergy - Reversed and Rendered Opinion
Summary
The Louisiana Court of Appeal reversed and rendered a trial court judgment against Entergy New Orleans, Inc. The appellate court found Entergy not liable for negligence related to a natural gas leak and personal injuries claimed by plaintiffs. This decision dismisses the plaintiffs' claims with prejudice.
What changed
The Louisiana Court of Appeal, Fourth Circuit, has reversed and rendered a prior judgment that found Entergy New Orleans, Inc. liable for negligence stemming from a natural gas leak on October 10, 2014, and subsequent personal injuries. The appellate court's decision, dated March 10, 2026, dismisses the plaintiffs' claims against Entergy with prejudice, overturning the trial court's findings of liability and damages. The court noted that Entergy had previously identified and repaired a cracked gas line cap on September 16, 2014, prior to the incident that led to the lawsuit.
This ruling has significant implications for the plaintiffs, whose claims for general damages have been dismissed. For regulated entities like Entergy, this represents a successful appeal against a negligence finding. While this specific case is concluded, it underscores the importance of thorough documentation of repairs and leak detection efforts. No specific compliance actions are required for other entities based on this ruling, but it serves as a precedent in negligence cases involving utility companies and their response to identified issues.
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by Judge Nakisha Ervin-Knott](https://www.courtlistener.com/opinion/10806771/peter-adams-v-entergy-new-orleans-inc-entergy-louisiana-llc-and/about:blank#o1)
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March 10, 2026 Get Citation Alerts Download PDF Add Note
Peter Adams v. Entergy New Orleans, Inc. Entergy Louisiana, L.L.C. and Sewerage and Water Board of New Orleans
Louisiana Court of Appeal
- Citations: None known
- Docket Number: 2025-CA-0444
- Judges: Judge Rosemary Ledet; Judge Dale N. Atkins; Judge Nakisha Ervin-Knott
Disposition: Reveresed and Rendered
Disposition
Reveresed and Rendered
Lead Opinion
by Judge Nakisha Ervin-Knott
PETER ADAMS, ET AL * NO. 2025-CA-0444
VERSUS *
COURT OF APPEAL
ENTERGY NEW ORLEANS, *
INC. ENTERGY LOUISIANA, FOURTH CIRCUIT
L.L.C. AND SEWERAGE AND *
WATER BOARD OF NEW STATE OF LOUISIANA
ORLEANS *******
CONSOLIDATED WITH: CONSOLIDATED WITH:
PETER ADAMS, ET AL NO. 2025-CA-0611
VERSUS
ENTERGY NEW ORLEANS, INC.,
ENTERGY LOUISIANA, L.L.C.
AND SEWERAGE AND WATER
BOARD OF NEW ORLEANS
APPEAL FROM
CIVIL DISTRICT COURT, ORLEANS PARISH
NO. 2015-09035, DIVISION “J”
Honorable D. Nicole Sheppard
Judge Nakisha Ervin-Knott
(Court composed of Judge Rosemary Ledet, Judge Dale N. Atkins, Judge Nakisha
Ervin-Knott)
Darleen M. Jacobs
Hunter Harris
Rene D. Lovelace
THE LAW OFFICES OF DARLENE M JACOBS
823 St. Louis Street
New Orleans, LA 70112-3415
COUNSEL FOR PLAINTIFFS/APPELLEES
Kim M. Boyle
Allen C. Miller
Ashley J. Heilprin
Stephanie M. Poucher
PHELPS DUNBAR LLP
365 Canal Street, Suite 2000
New Orleans, LA 70130
COUNSEL FOR DEFENDANT/APPELLANT
REVERSED AND RENDERED
MARCH 10, 2026
NEK Defendant-Appellant, Entergy New Orleans, LLC (“Entergy”), appeals the
RML
trial court’s March 31, 2025 and July 2, 2025 judgments rendered in favor of
DNA
Plaintiffs-Appellees, Peter Adams, et al.1 (collectively, “Plaintiffs”). The trial court
found Entergy liable for negligence following a natural gas leak on October 10,
2014, and awarded general damages for alleged personal injuries. For the reasons
that follow, we reverse the trial court’s judgments in favor of Plaintiffs and render
judgment in favor of Entergy dismissing Plaintiffs’ claims with prejudice.
FACTUAL AND PROCEDURAL HISTORY
On September 16, 2014, Entergy was performing a gas leak detection patrol
and identified a potential natural gas leak in the 1700 block of Painters Street, in
New Orleans, Louisiana. An Entergy repair crew was dispatched to the area and
pinpointed a cracked two-inch PE high volume cap on the main natural gas line. The
repair crew replaced the cracked cap that same day.
In a nearby area, on October 3, 2014, a drunk driver collided with an 18-
wheeler loaded with gasoline triggering a fire to erupt in the cab of the 18-wheeler.
According to New Orleans Fire Department Captain Michael Calamari (“Captain
1 There are over 100 individuals listed as Plaintiffs in this lawsuit.
1
Calamari”), the fire melted the 18-wheeler’s aluminum tank trailer causing gasoline
to spill onto the street and into storm drains and grass along the side of the road, and
fumes and smoke from the fire to move into the neighborhood. The tanker explosion
was so severe that the driver of the 18-wheeler succumbed to injuries sustained in
the fire.
On October 10, 2014, exactly one week after the tanker explosion – another
natural gas leak was reported at the intersection of Painters Street and North
Derbigny Street, which is just one block away from the location of the tanker
explosion. Upon investigation, Entergy technicians identified a leak in a plastic gas
main. The failure was subsequently attributed to a failure in the two-inch sidewall T
fusion in the main gas line. Entergy personnel repaired the natural gas leak on the
same day it was reported.
Plaintiffs, who were residents of the neighborhood where the October 10,
2014 gas leak occurred, filed a claim for damages on September 18, 2015, and a first
supplemental and amending petition on September 22, 2015. Entergy New Orleans,
Inc., Entergy Louisiana, L.L.C., and Sewerage and Water Board of New Orleans
were named as Defendants. Plaintiffs alleged that the leaking natural gas caused
them to suffer a variety of symptoms, including headaches, nausea, dizziness, and
aggravation of pre-existing lung, asthma, and sinus conditions. Plaintiffs contended
that Entergy was negligent in its maintenance and inspection of the gas line.
A bench trial was conducted between May 6, 2024, and August 26, 2024. At
trial, seventy-nine Plaintiffs testified regarding their personal experiences during the
October 10, 2014 natural gas leak, specifically describing the smell of natural gas in
the air throughout the neighborhood and the physical symptoms they attributed to
the natural gas exposure. Plaintiffs’ testimony included reports of headaches,
2
congestion, runny noses, abdominal cramping, diarrhea, and asthma (or asthma
exacerbations). Additionally, Plaintiffs’ certified medical records related to their
purported injuries were admitted into evidence. Notably, Plaintiffs did not present
any expert testimony regarding medical causation.
On the other hand, Entergy presented the expert testimony of Dr. Christopher
Spaeth (“Dr. Spaeth”), a toxicologist, to opine on the effects of natural gas exposure
to human health. Additionally, Entergy’s gas engineering superior, Stephen
Mirambell (“Mr. Mirambell”) and Entergy employee, Daniel Murray (“Mr.
Murray”) testified about the September 16, 2014 and October 10, 2014 incidents and
Entergy standard protocol. Entergy work reporting forms and DIMP leak forms from
the September 16, 2014 and October 10, 2014 incidents were also admitted into
evidence.
At the conclusion of trial, the trial court took the matter under advisement. On
March 31, 2025, the trial court rendered judgment in favor of the Plaintiffs finding
“through several hours of the [P]laintiff’s testimony, it is evident that the symptoms
were caused or aggravated by the [n]atural [g]as leak.” The court awarded general
damages to each Plaintiff in various amounts ranging from $0 - $5,000.00.
On April 17, 2025, Entergy filed a petition for suspensive appeal, and the
order granting the appeal was signed on April 28, 2025. Two Plaintiffs were not
included in the March 31, 2025 judgment; therefore, on July 2, 2025, the trial court
issued a subsequent judgment to include these two Plaintiffs. Again, on July 11,
2025, Entergy filed a petition of suspensive appeal regarding the July 2, 2025
judgment, and the order granting the appeal was signed on July 11, 2025. On October
1, 2025, Entergy filed an unopposed motion to consolidate with this Court, and we
3
issued an order consolidating the two appeals on the next day. This timely
consolidated appeal follows.
STANDARD OF REVIEW
“A trial court’s factual determinations made after a bench trial are reviewed
with the manifest error/clearly wrong standard of review.” Reaver v. Degas House,
LLC, 2022-0464, p. 3 (La. App. 4 Cir. 3/13/23), 359 So. 3d 570, 573 (citing Hall v.
Folger Coffee Co., 2003-1734, p. 9 (La. 4/14/04), 874 So. 2d 90, 98). “This
standard ‘precludes the setting aside of a district court's finding of fact unless that
finding is clearly wrong in light of the record reviewed in its entirety.’” Id.
Conversely, “[l]egal questions are reviewed utilizing the de novo standard of
review.” Id. at p. 3, 359 So. 3d at 574 (quoting Robert v. Robert Mgmt. Co., LLC,
2011-0406, p. 3 (La. App. 4 Cir. 12/7/11), 82 So. 3d 396, 398).
DISCUSSION
On appeal, Entergy asserts three assignments of error – (1) Plaintiffs failed to
establish Entergy’s liability under Civil Code articles 2315, 2317, and 2317.1; (2)
Plaintiffs failed to meet their burden of demonstrating that the October 10, 2014
natural gas leak caused their injuries; and (3) Plaintiffs failed to establish their
entitlement to the general damages the trial court awarded, such that assuming that
Entergy was liable, the damages awarded must be drastically reduced.
4
First, Entergy contends the trial court erred in finding it liable under La. C.C.
arts. 23152, 23173, and 2317.14. Specifically, Entergy asserts that the trial court
manifestly erred in presumably finding that it had actual or constructive knowledge
of the conditions that caused the October 10, 2014 natural gas leak and that it could
have prevented the leak through the exercise of reasonable care.
This Court previously observed:
[T]he Louisiana Supreme Court recently expounded that “[w]hether a
claim arises in negligence under [La. C.C.] art. 2315 or in premises
liability under [La. C.C.] art. 2317.1, the traditional duty/risk analysis
is the same.” Farrell v. Circle K Stores, Inc., [20]22-00849, p. 5 (La.
3/17/23), 359 So. 3d 467, 473. “And now, with [La. C.C.] art. 2317.1’s
requirement of actual or constructive knowledge of a defect, the result
under either should be the same.” Id. “In any event, a claim
under [La. C.C.] art. 2315 typically focuses on whether the defendant's
conduct of allowing an unreasonably dangerous condition to exist on
its premises is negligent, while a [La. C.C.] art. 2317.1 claim focuses
on whether the thing itself is defective; i.e., unreasonably
dangerous.” Id. “But, when the legislature eliminated strict liability for
defective things in one's custody by adding [La. C.C.] art. 2317.1,
a negligence standard replaced it.” Id. “The requirements of actual or
constructive knowledge of the defect and proof that the defendant could
have prevented damage from the defect by exercising reasonable care
evidences this shift.” Id. (citing Malta v. Herbert S. Hiller Corp.,
[20]21-209, p.11 (La. 12/10/21), 333 So. 3d 384, 395).
2 Louisiana Civil Code Article 2315 provides, in pertinent part, “Every act whatever of man that
causes damage to another obliges him by whose fault it happened to repair it.”
3 Louisiana Civil Code Article 2317 provides, “We are responsible, not only for the damage
occasioned by our own act, but for that which is caused by the act of persons for whom we are
answerable, or of the things which we have in our custody. This, however, is to be understood with
the following modifications.”
4 Louisiana Civil Code Article 2317.1 provides:
The owner or custodian of a thing is answerable for damage occasioned by its ruin,
vice, or defect, only upon a showing that he knew or, in the exercise of reasonable
care, should have known of the ruin, vice, or defect which caused the damage, that
the damage could have been prevented by the exercise of reasonable care, and that
he failed to exercise such reasonable care. Nothing in this Article shall preclude the
court from the application of the doctrine of res ipsa loquitur in an appropriate case.
5
Williams v. Touro Infirmary, 2023-0180, pp. 9-10 (La. App. 4 Cir. 12/20/23), 382
So. 3d 345, 352-353. A plaintiff seeking to recover damages under La. C.C. arts.
2317 and 2317.1 must prove that:
(1) [T]he thing was in the [owner or] custodian’s custody or control;
(2) it had a vice or defect that presented an unreasonable risk of
harm; (3) the defendant knew or should have known of the
unreasonable risk of harm; and (4) the damage was caused by the
defect.
Fisher v. Villere, 2020-0242, p. 9 (La. App. 4 Cir. 2/24/21), 313 So. 3d 1282, 1289
(citation omitted). “Failure of the plaintiff to prove any one of the above factors is
fatal to the case.” Id.
Constructive notice has been defined as “the existence of facts which infer
actual knowledge.” Russell v. Forest Isle, Inc., 2018-0602, p. 5 (La. App. 4 Cir.
12/5/18), 261 So. 3d 47, 50 (citations omitted). “Constructive notice can be found if
the conditions which caused the injury existed for such a period of time that those
responsible, by the exercise of ordinary care and diligence, must have known of their
existence in general and could have guarded the public from injury.” Id. “The
concept of constructive knowledge imposes a reasonable duty to discover apparent
defects in things under the defendant’s garde.” Lotridge v. Abril, 2007-1401, p. 5
(La. App. 4 Cir. 12/30/08), 3 So. 3d 84, 88 (citation omitted).
In this case, the record is devoid of evidence that Entergy had actual or
constructive notice of the T fusion failure prior to the October 10, 2014 natural gas
leak. During trial, Mr. Mirambell testified about both the September 16, 2014 and
October 10, 2014 natural gas leak incidents and explained how the two incidents
were unrelated. According to Mr. Mirambell, the September 16, 2014 natural gas
leak was caused by a cracked two-inch PE high volume cap. He testified that the
repair crew replaced the leaking cap as soon as it was discovered to be the source of
6
the leak, and the Entergy work reporting form for that day stated “job complete”,
meaning there was no longer a gas leak in that area. Mr. Murray corroborated his
testimony and expounded on the fact that Entergy had repaired the cap issue on
September 16, 2014. Mr. Murray testified that the gas leak was remedied prior to
marking the job as complete. While the September 16, 2014 natural gas leak was
due to a cracked cap, Mr. Mirambell explained that the October 10, 2014 natural gas
leak was caused by a defective T fusion. He further testified that the September 16,
2014 incident had no effect on the October 10, 2014 incident.
Plaintiffs failed to rebut Messrs. Mirambell and Murray’s testimonies,
Entergy work reporting forms, and DIMP leak forms with any evidence
demonstrating that the September 16, 2014 incident should have put Entergy on
notice of the defective T fusion that caused the October 10, 2014 incident. In their
petition, Plaintiffs alleged that Entergy was “notified of repeated gas leaks near the
intersection of Painters and N. Derbigny Streets…but failed to replace pipelines in
that area . . ..” However, the only person who testified to having called Entergy to
report any leak was Plaintiff, Ms. Diane Patterson (“Ms. Patterson”). Significantly,
Ms. Patterson testified that she called Entergy on October 10, 2014. The Entergy
work reporting form and DIMP leak form were dated October 10, 2014, which meant
that Entergy came out to the location and repaired the natural gas leak on October
10, 2014. Ms. Patterson’s testimony, together with the October 10, 2014 work
reporting form and DIMP leak form, establishes that Entergy repaired the leak on
the same day it was reported.
An examination of the record reveals that Plaintiffs did not put forth any
evidence that Entergy had prior notice of the natural gas leak. Due to Plaintiffs’
failure to prove the essential element of actual or constructive notice, the trial court’s
7
determination of negligence was manifestly erroneous. Therefore, Entergy’s first
assignment of error has merit.
Second, Entergy maintains that Plaintiffs failed to meet their burden of
demonstrating that the October 10, 2014 natural gas leak caused their injuries.
Entergy maintains the position that Plaintiffs were required to show causation – that
the October 10, 2014 natural gas leak caused their purported injuries – and failed to
do so.
“In a personal injury suit, plaintiff bears the burden of proving a causal
relationship between the injury sustained and the accident which caused the injury.”
Maranto v. Goodyear Tire & Rubber Co., 1994-2603, p. 3 (La. 2/20/95), 650 So. 2d
757, 759 (citation omitted). “In toxic tort cases, proof of causation has two
components: general and specific.” Lataxes v. Louisiana Home Specialists, LLC,
2024-129, p. 10 (La. App. 5 Cir. 12/30/24), 409 So. 3d 1010, 1017 (citation
omitted). “‘General causation’ refers to whether a substance is capable of causing a
particular injury or condition in the general population, while ‘specific causation’
refers to whether a substance caused a particular individual’s injury.” Id. (citation
omitted). “A plaintiff cannot sustain his or his burden of proof with general causation
proof alone; the plaintiff must also establish specific causation.” Id. (citation
omitted).
As it relates to expert testimony, “[w]hen a conclusion regarding medical
causation is not one within common knowledge, expert medical testimony is
required in a tort action.” Johnson v. E.I. DuPont deNemours & Co., 2008-628 (La.
App. 5 Cir. 1/13/09), 7 So. 3d 734, 740 (citation omitted). Significantly, “[s]cientific
knowledge of the harmful level of exposure to a chemical, plus knowledge that the
plaintiff was exposed to such quantities, are minimal facts necessary to sustain the
8
plaintiffs’ burden in a toxic tort case.” Allen v. Penn. Eng’g Corp., 102 F.3d 194,
199 (5th Cir. 1996) (citation omitted); see also Smith v. BP Expl. & Prod., Inc., No.
2023-30619, 2024 WL 3842571, at *2 (5th Cir. Aug. 16, 2024) (unpublished)
(citation omitted) (“In toxic tort cases, expert evidence on ‘knowledge of the harmful
level of exposure to a chemical,’ or general causation, is a ‘minimal fact necessary
to sustain the plaintiffs’ burden’”).
In this present matter, Plaintiffs bore the burden of establishing that the
October 10, 2014 natural gas leak caused their alleged injuries. Seventy-nine
Plaintiffs testified regarding their personal experiences during the October 10, 2014
natural gas leak, specifically describing the smell of natural gas in the air throughout
the neighborhood and the physical symptoms they attributed to the natural gas
exposure. Plaintiffs’ testimony included reports of headaches, congestion, runny
noses, abdominal cramping, diarrhea, and asthma (or asthma exacerbations).
However, at trial, Plaintiffs failed to present any expert testimony to establish
medical causation. The lack of expert testimony is fatal to Plaintiffs’ case.
Plaintiffs attempt to circumvent their lack of an expert by relying on
the Housley presumption. However, this reliance is misplaced. “A plaintiff may be
assisted in meeting his burden of proof that an injury is causally related to an accident
by a legal presumption that was articulated by the Louisiana Supreme Court
in Housley v. Cerise, 579 So.2d 973 (La.1991).” Kelly v. AME Janitorial Services
Co., 2009-1167, p. 3 (La. App. 4 Cir. 3/3/10), 33 So. 3d 358, 360. Citing Housley,
this Court explained:
A claimant’s disability is presumed to have resulted from an accident,
if before the accident the injured person was in good health, but
commencing with the accident the symptoms of the disabling condition
appear and continuously manifest themselves afterwards, providing
9
that the medical evidence shows there to be a reasonable possibility of
causal connection between the accident and the disabling condition.
Id. (citation omitted). A plaintiff must establish the following three elements by a
preponderance of the evidence in order to benefit from the Housley presumption:
First, the plaintiff must prove that he was in good health prior to the
accident allegedly causing the plaintiff’s injury. Second, the plaintiff
must show that subsequent to the accident, symptoms of the alleged
injury appeared and continuously manifested themselves after the
accident. Third, the plaintiff must demonstrate through medical
evidence, circumstantial evidence, or common knowledge that there
was a reasonable possibility of causation between the accident and the
alleged injury.
Id. at p. 4, 33 So. 3d at 360.
Plaintiffs have not presented sufficient evidence to establish by a
preponderance of the evidence that their alleged medical issues were more probable
than not caused by their exposure to natural gas during the October 10, 2014
incident. None of Plaintiffs’ certified medical records attributed their illnesses to
natural gas exposure, and their treating physicians did not link their symptoms to
natural gas exposure. Also, while the incident that forms the basis of this case
occurred on October 10, 2014, one Plaintiff began receiving medical treatment on
October 9, 2014 – the day before the October 10, 2014 gas leak – and another
plaintiff did not seek medical care until three months after the October 10, 2014
incident on January 12, 2015.
Moreover, the circumstantial evidence would tend to support a finding that
the October 3, 2014 tanker explosion – not the October 10, 2014 natural gas leak –
caused Plaintiffs’ medical issues, as the certified medical records showed that
seventeen Plaintiffs attributed their symptoms to the October 3, 2014 tanker
explosion and not the October 10, 2014 gas leak. Additionally, Captain Calamari
10
testified about the severity of the October 3, 2014 tanker explosion, specifically
discussing the lingering presence of gasoline in the air and the effects of the fire.
Lastly, Louisiana jurisprudence recognizes that common knowledge is
inapplicable in the toxic tort context. E.I. DuPont deNemours & Co., 2008-628, p.
8, 7 So. 3d at 740 (“[W]hether or not plaintiffs suffered injuries as a result of
chemical exposure…is not a determination based on common knowledge, so the
plaintiffs were required to present expert medical testimony in order to meet their
burden of proving medical causation”). Plaintiffs’ inability to prove by a
preponderance of the evidence the three essential elements does not entitle them to
the Housley presumption.
At trial, Entergy presented unrefuted expert testimony from Dr. Spaeth who
explained that natural gas, and its odorant, methyl mercaptan, are incapable of
causing Plaintiffs’ alleged injuries. Dr. Spaeth testified that in an outdoor, open-air
environment, natural gas dissipates rapidly and does not pose a risk to human health,
and only when a person is exposed to an extremely high concentration of natural gas
can they suffer two possible health risks that natural gas poses – asphyxiation and
hypoxia. Further, Dr. Spaeth opined that even high exposure levels to natural gases
cannot cause the types of medical issues that Plaintiffs experienced, such as nasal
drip, burning eyes, diarrhea, bronchitis, nausea, shortness of breath, headaches, and
asthma. Importantly, Dr. Spaeth provided the following expert testimony:
Q: There was approximately 112,200 cubic feet of gas released into the
air at a rate of 5,000 feet per second as a result of the natural gas leak
on October 10th, 2014; correct?
A: That is correct.
Q: In an open-air environment, is that amount of natural gas toxic?
11
A: No, that amount of natural gas would not be expected to cause any
toxicity.
Q: Okay. Is that enough natural gas [to] decrease the amount of
breathable oxygen?
A: No. That amount of natural gas would not decrease the breathable
oxygen in the area because of how quickly the natural gas disperses and
how light it is compared to ambient air.
….
Q: Okay. Now, is it possible in an open space, as we have in this case,
to have a high enough concentration of natural gas to pose a risk of
hypoxia?
A: So natural gas dissipates almost instantaneously in the open air, so,
no, there’s — you know, there’s no possibility that it would reach these
types of concentrations in open air for somebody to asphyxiate or show
signs of hypoxia.
….
Q: Under any scenario, given the amount of gas that was released in an
open area, under any scenario, could that amount of gas have been
harmful to humans?
A: So since the — since we know that natural gas disperses infinitely
and almost instantaneously in open air, there wouldn’t be enough
natural gas that was released that would cause an injury in open air or
any type of toxicity in open air.
Q: Could enough mercaptan have escaped sufficient to cause any injury
to humans?
A: No. Based on the toxicology studies on mercaptan and how much
mercaptan was added to the line, we know that the mercaptan that
escaped would not have been causal with any injuries as a result.
Dr. Spaeth’s testimony was clear – Plaintiffs were not exposed to sufficiently high
concentrations of natural gas on October 10, 2014, to cause asphyxiation, hypoxia,
or any of their alleged illnesses.
In an attempt to produce evidence of medical causation, Plaintiffs isolate a
portion of Dr. Spaeth’s testimony on cross-examination regarding methyl mercaptan
to advance the argument that their illnesses were caused by exposure to mercaptan:
12
Q: Your report states that gas would not remain in the area once the
leak stopped. However, you also state that residual odor may remain in
the area where the leak occurred; is that correct?
A: That is correct. Yes
Q: Can you tell us how long the residual odor lasted in the area where
the leak occurred?
A: So to — I’m unable to tell you that as a result of — now, we haven't
— there’s a number of different factors that would affect dispersion of
a gas that’s heavier than ambient air. So methyl mercaptan is heavier
than ambient air and would exhibit different dispersion properties than
natural gas, which would quickly disperse. However, mercaptan would
settle down onto the street level and could be around for quite a while.
And I’d also like to point out that the odor threshold for mercaptan is
incredibly low. So it’s super easy to smell, even at low concentrations.
So —
Q: Isn’t it a —
A: — the duration of time that it was — I’m sorry. I’m sorry. I’m
getting there. The duration of time that it would be there could have
been a while given the buildings and the other things that were around,
but it didn’t necessarily indicate natural gas at that point.
Q: Doesn’t mercaptan have side effects?
A: So absolutely. There is a toxicological assessment that’s been
performed on methyl mercaptan, and there are definite known toxic
effects from methyl mercaptan exposure.
Q:And if mercaptan was in the area because it odorized the gas and
someone breathed it, they could be affected; is that correct?
A: So that is incorrect. And what you’re — what you're doing is what’s
called a hazard assessment. So, yes, the mercaptan can cause some
injuries; however, it’s also dependent upon the dose and the exposure.
We know, based on data and the U.S. Code of Federal Regulations, that
a certain amount of mercaptan was added to that line. And we know
that it’s 8 ppm. That level is sufficiently below the safety threshold that
even in a leak like this, the mercaptan would never achieve a high
enough concentration to produce toxicity. And that is done on purpose
to prevent methyl mercaptan toxicity.
13
Dr. Spaeth’s testimony concedes that there are known toxic effects from mercaptan
exposure. However, he unequivocally opines that, given the nature of the October
10, 2014 gas leak, the mercaptan levels in the gas line were far too low to cause any
illness. Therefore, while Plaintiffs may seek to use Dr. Spaeth’s testimony to bolster
their causation argument, his testimony actually supports Entergy’s position that
there is no causal relationship between the October 10, 2014 incident and Plaintiffs’
alleged injuries.
It is evident from the record that Plaintiffs failed to present any expert
testimony necessary to prove that natural gas exposure causes the particular injuries
Plaintiffs purportedly suffered. Without this necessary evidence, Plaintiffs were
unable to establish general causation. Ultimately, Plaintiffs’ inability to establish
general causation rendered them incapable of proving causation, an essential
element of any negligence case. The trial court clearly erred in its determination that
the October 10, 2014 natural gas leak was the cause of Plaintiffs’ alleged injuries.
Accordingly, because Plaintiffs have failed to prove causation in this matter,
Entergy’s second assignment of error also has merit. Given the fact the Plaintiffs
failed prove the requisite elements of actual or constructive notice and causation,
reversal of the trial court’s liability determination is required.
Given our above-referenced analysis regarding Entergy’s first two
assignments of error and finding that Entergy is not liable to Plaintiffs for their
alleged injuries, we pretermit our discussion of the last assignment of error
concerning the damage awards as this issue is moot.
14
DECREE
For the foregoing reasons, we reverse the trial court’s March 31, 2025 and
July 2, 2025 judgments in favor of Plaintiffs and render judgment in favor of Entergy
dismissing Plaintiffs’ claims with prejudice.
REVERSED AND RENDERED
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