OPINION
Prоperty owners sued DeSoto Fuels, Inc., alleging that gasoline leaking from tanks at DeSoto’s gas station had contaminated their land and groundwater. The trial court granted summary judgment in favor of DeSoto based on the statute of limitations, and the property owners appeal. We reverse and remand.
I. BACKGROUND
DeSoto owned and operated an Amoco gas station located near property owned by Claude and Mary Jeanne Cook. At some point, a leak allegedly developed in at least one of the three underground storage tanks (“USTs”) that supplied the sta *100 tion with gasoline, resulting in the contaminatiоn of the Cooks’ property.
The Cooks had two wells on their property. One well provided water for the Cooks’ own residence and the other supplied water to a residence that the Cooks rented out to tenants. One of the Cooks’ tenants noticed a strong odor of gasoline and a rainbow sheen in the water and reported this to the Missouri Department of Natural Resources. In July of 1993, the Department tested the well supplying the rental property for contamination. At some point during that year, Claude Cook also noticed that the water had an odor and he became aware that the Department’s tests showed the presence of contaminants.
The Department tested the water in both of the wells in December of 1993. The Department’s Preliminary Report, issued on March 25, 1994, indicated that the water from both of the Cooks’ wells was contaminated with constituents of gasoline. The report identified four nearby gas station sites, including DeSoto’s gas station, as possible sources of the pollution. The Department concluded that additional work was needed to determine which of those four sites was the source of the contamination. Also in March of 1994, the Cooks drilled a new well on the property “as a precaution.” This new well became contaminated within a month, so the Cooks had their residence connected to the city water supply.
On March 8, 1996, the Department issued its Final Report. It described the existence of contamination and again identified the same four potentially responsible parties, including DeSoto, which by then had ceased operating its gas station. The following year, the Department installed two groundwater monitoring wells in an effort to identify the cause and source of the contamination. In September of 1997, the Department issued an addendum to its Final Report, this time identifying DeSo-to’s fоrmer Amoco station as the sole source of the contamination.
The record does not reveal when the Cooks had actual notice of any of the Department’s reports. But in August of 2000, the Cooks entered into a contract to sell their property, and the prospective buyer’s investigation revealed an unacceptable level of contamination. After the contract was cancelled, the Cooks hired counsel, who discovered and reviewed the Department’s files.
The Cooks 1 filed their petition against DeSoto and two other defendants on March 30, 2001, claiming negligence, trespass аnd private nuisance. 2 The Cooks alleged that the defendants “failed to undertake adequate measures to prevent or to detect the releases” that caused the contamination of the Cooks’ property and that the defendants knew or should have known about the releases. The Cooks further alleged that they did not know about the extent of the damage to their property until they attempted to sell it in 2000. The Cooks claimed that the defendants’ conduct resulted in the continuing entry, trespass, or intrusion onto their property and that the defendants continued to unreason *101 ably interfere with the Cooks’ usе and enjoyment of their property by releasing chemicals onto their property.
Amoco, one of the original defendants, moved for summary judgment based on the statute of limitations. DeSoto filed a separate motion, stating that it “affirmatively adopts as its own and joins in” Amoco’s motion for summary judgment. While Amoco’s motion was pending and before it was noticed for hearing, Amoco was dismissed from the lawsuit and withdrew its motion for summary judgment. Subsequently, DeSoto withdrew its motion for summary judgment, but later filed another motion seeking to “readopt and reassert” Amoco’s motion for summary judgment as DeSoto’s own, including the arguments and assertions in Amoco’s supporting memorandum and exhibits. The Cooks filed a motion to strike DeSoto’s motion based on a failure to comply with Rule 74.04, which the trial court denied. The court granted summary judgment in favor of DeSoto based on the five-year statute of limitations in section 516.120 RSMo 2000. 3 The Cooks appeal.
II. DISCUSSION
Whether summary judgment is appropriate is a question of law, and therefore our review is
de novo. ITT Commercial Finance Corp. v. Mid-America Marine Supply Corp.,
DeSoto, as a defending party, may establish a right to judgment аs a matter of law by showing that there is no genuine dispute about each of the facts necessary to support a properly-pled affirmative defense. See id. at 381. If DeSoto made this prima facie showing under Rule 74.04(c), then the Cooks bore the burden of responding with specific facts showing the existence of a genuine issue for trial. See id.
A. Adoption of Another Party’s Motion for Summary Judgment
The Cooks argue that DeSoto’s motion for summary judgment was procedurally deficient in that it did not follow the requirements of Rule 74.04 and contend that the court should not be expected to “sift through” the abandoned motion of a dismissed defendant to determine which facts support DeSoto’s motion.
The Cooks do not cite, and we сannot find, any authority that would have precluded DeSoto from adopting Amoco’s motion for summary judgment as its own. Nor do the Cooks explain how they suffered any prejudice because of this procedure. As the trial court noted, this practice is not uncommon.
See, e.g., Hudson v. Riverport Performance Arts Centre,
Point denied.
B. Statute of Limitations
Whether the statute of limitations bars a lawsuit depends on the nature of the cause of action and when the action accrued.
Schwartz v. Mills,
We conclude that the Cooks’ causes of action initially accrued more than five years before they filed this lawsuit bеcause the damage to their property and its cause were capable of ascertainment more than five years prior to this lawsuit. Nevertheless, DeSoto has not established that the Cooks’ claims are totally time-barred because they have asserted claims for a continuing trespass and a temporary nuisance and therefore can recover for those damages that accrued within the statutory period preceding this lawsuit — namely, five years for the trespass claim and ten years for the nuisance claim.
We begin our discussion by noting that, while there are differences betweеn a trespass and a nuisance cause of action, the two are neither mutually exclusive nor inconsistent. Restatement (Second) of ToRts section 821D cmt. e (1979). Thus, where the elements of both actions are fully present, plaintiffs may choose to proceed upon one or both theories.
Id.
While trespass involves interference with the plaintiffs’ possessory rights and requires an intentional act that results in a physical invasion of the plaintiffs’ property, nuisance involves an unreasonable land use that interferes with the plaintiffs’ right of enjoyment and does not require an intentional act.
See Frank v. Environmental Sanitation Management, Inc.,
1. Trespass
The Cooks’ trespass claim is governed by the five-year statute of limitations in section 516.120.
Thomas,
Here, the Cooks had actual knowledge of the fact that their property had been damaged by April of 1994 when their new well became contaminated, if not sooner. But, when viewing the record in a light most favorable to the plaintiffs, it appears that the plaintiffs were not kept informed about the status of the Dеpartment’s investigations and were not immediately made aware that the Department’s reports identified DeSoto as one of four parties potentially responsible for causing the contamination. Although it is not clear from the record when the plaintiffs had actual notice of those reports, actual notice is not required under the “capable of ascertainment” test.
We find that the Cooks were capable of ascertaining DeSoto’s identity as one of four possible tortfeasors by early March in 1996, if not sooner, since by then the Department had finished its second report *104 suggesting that DeSoto may be the source of the contamination, and almost two years had elapsed since the Cooks began using the municipal water supply instead of their own well. Even if the Department failed to keep the Cooks informed about who might have been responsible for the contamination, a reasonable person would have inquired about the status of the investigation by that time.
We note that there is some authority for the proposition that a cause of action does not accrue until both the damages and the cause of those damages are reasonably ascertainable.
See, e.g., Elmore v. Owens-Illinois, Inc.,
The Cooks suggest that the action did not accrue until after the Department released its addendum in 1997 that identified DeSoto as the sole source of the contamination. We disagree. While neither рarty cites any case where the plaintiffs knew
what
caused their injuries but were temporarily unable to ascertain precisely
who
was responsible for the damage, at least one Missouri case has rejected the argument that the plaintiffs inability to discover the identity of the tort-feasor should delay the accrual of the cause of action.
See Frazee v. Partney,
Therefore, with respect to the initial invasion of contaminants, the Cooks’ cause of action accrued before March 30, 1996, more than five years before this lawsuit was filed. Thus, unless the Cooks have also alleged a continuing trespass, their trespass claim would be totally barred by the statute of limitations.
2. Continuing Trespass
In the “peculiar and particular circumstances” where a “continuing or repeated wrong” is involved, an additional layer of analysis is required to determine when the cause of action accrued with respect to each successive trespass under section 516.100:
if the wrong done is of such a character that it may be said that all of the damages, past and future, are capable of ascertainment in a single action so that the entire damage accrues in the first instance, [then] the statute of limitation begins to run from that time. If, on the other hand, the wrong may be said to continue from day to day, and to create a fresh injury from day to day, and the wrоng is capable of being terminated, [then] a right of action exists for the damages suffered within the statutory period immediately preceding suit.
Davis v. Laclede Gas Co.,
A continuing trespass upon real property creates separate causes of action, which are barred only by the running of the statute against the successive trespasses, and not by the running of the statute from the time of the original trespass. So, also, if a trespass is followed by injury constituting a continuing nuisance, the damages for the original trespass must all be recovered in one action, but successive actions may be brought to recover damages for the continuation of the wrongful conditions, and in these the damages are estimated only to the date of the bringing of each suit, and the statute of limitations does not begin to run from the date of the original trespass. In the case of a continuing trespass the statute does not begin to run from the date of the original entry, but recovery may be had for a period of time not exceeding the statutory period immediately prеceding the institution of the action. Thus, in case of a continuous trespass for a series of years, the action is barred as to so much only of the wrong as was committed prior to the term of limitation.
Cacioppo,
In this case, the Cooks have alleged that DeSoto’s negligence has caused an underground flow or migration of contaminants onto their property. But DeSoto’s negligence is not the relevant wrong for purposes of analyzing whether the Cooks have alleged a continuing trespass. Rather, the wrong is the actual physical invasion of the Cooks’ property. Thus, the relevant question is whether the Cooks have аlleged a continuous or repeated invasion of their property. The Cooks claim that DeSoto’s conduct resulted in the “continuing entry, trespass, and intrusion onto Plaintiffs’ property by the petroleum products from the Station without Plaintiffs’ permission.” The petition also refers to “the releases” in the plural form. Although the petition is not very specific, we find that the Cooks have adequately alleged the existence of a continuous, ongoing, intermittent, or repeated flow or migration of contaminants from DeSoto’s property onto their property. In this way, the Cooks have alleged the type of “frеsh injury from day to day” described in
Davis. See
In its brief, DeSoto asserts that this case involves only a single leak of gasoline. We agree that the existence of a single leak or migration of contaminants would not constitute a continuing wrong, even if the contaminants remained present in the ground.
See Modern Tractor,
863 S.W.2d
*106
at 951-54 (unauthorized presence of fill dirt on plaintiffs property did not constitute continuing trespass). The mere presence of contaminants does nоt reveal whether there was one wrong resulting in continuing damage, or whether there were continuous or repeated wrongs that created fresh injuries from day to day and were capable of being terminated.
See Davis,
Therefore, the Cooks have adequately presented a continuing trespass claim, whiсh, if proven, would permit them to recover for those damages that accrued within the five-year period preceding this lawsuit. But under their trespass theory, they are barred from recovering any damages that were capable of ascertainment more than five years before the lawsuit; that is, before March 30,1996.
3. Temporary Nuisance
The parties disagree about how to characterize the Cooks’ nuisance claim. A nuisance can be either permanent or temporary.
Rebel v. Big Tarkio Drainage District of Holt City,
In determining whether a nuisance is permanent or temporary, the character of the source of the injury — not the character of the injury itself — is determinative.
Rebel,
Nuisance claims involving environmental contamination have sometimes been characterized as permanent and other times as temporary.
See, e.g., Frank,
The effect of characterizing a nuisance as permanent is to “give the defendant, because of his wrongful act, the right to continue the wrong; a right equivalent to an easement.”
Schwartz,
The period of limitations as to a temporary nuisancef ] runs anew from the accrual of injury from every successive invasion of interest. The recovery is for the damage actually sustained to the commencement of suit, but not for prospective injury.... The right to a successive action for the continuance of a nuisance rests on the principle that the tort-feasor ... is under [a] legal obligation to remove, change, or repair the structure or thing complained of, and thereby terminate the injury to his neighbor; and, failing so to do, each day’s continuance of the nuisance is a repetition of the original wrong, and a new action will lie therefor.
Rebel,
Claims of permanent nuisance are governed by thе five-year statute of limitations in section 516.120.
Thomas,
Here, the Cooks have alleged that DeSo-to continues to unreasonably interfere with their use and enjoyment of their property by “releasing” chemicals onto it. They claim that the source of their injury is one or more of DeSoto’s leaking USTs and that DeSoto knew or should have known about the releases. These allegations could constitute a nuisance resulting from either negligence or a continuing known invasion.
See Frank,
Point granted.
C. Summary and Disposition
In sum, DeSoto has failed to establish the facts necessary to support its affirmative defense that the Cooks’ claims are barred by the statute of limitations. Therefore, summary judgment was inappropriate.
See ITT,
III. CONCLUSION
The judgment is reversed, and the case is remanded for further proceedings consistent with this opinion.
Notes
. The original plaintiffs were Claude and Mary Jeanne Cook, in their individual capacities and as trustees of their separate inter vivos trusts, and the Cook Limited Partnership. The Cooks have since died, and the Partnership currently owns the property. For ease of reference, we will refer to the plaintiffs collectively as the Cooks.
. The other defendants later settled with the Cooks or were dismissed from the action, leaving DeSoto as the sole remaining defendant. The Cooks' unjust enrichment claim was dismissed, and is not at issue on appeal. Since there is no claim of a public nuisance in this case, any further references to nuisance law pertain to private nuisances.
. All statutory references are to RSMo 2000, unless otherwise noted.
. On аppeal, the Cooks do not challenge the propriety of summary judgment as to their negligence claim.
. In fact, the concept of a temporary nuisance appears to be essentially an application of continuing wrong principles to situations involving nuisances.
. Under section 516.010, "[n]o action for the recovery of any lands, tenements or heredita-ments, or for the recovery of the possession thereof, shall be commenced, had or maintained by any person ... unless it appear that the plaintiff, his ancestor, predecessor, grant- or or other person under whom he claims was seized or possessed of the premises in question, within ten years before the commencement of such action.”
