*1361 MEMORANDUM OPINION
I. INTRODUCTION
This аction originated with a complaint filed by New Castle County (the “County”) seeking a declaratory judgment against twelve insurance companies which had issued comprehensive general liability policies to the County. (Docket Item [“D.I.”] 1.) The County requested a declaration that the insurance companies must defend and indemnify the County in claims relating to pollution emanating from two landfills utilized by the County. The insurance companies filed аnswers denying coverage for the claims and asserting affirmative defenses. (D.I. 6, 7, 10-14, 25, 28, 40.) Several insurers also filed counterclaims. The County ultimately settled its claims against four of the insurers. 1 (D.I. 45,124, 148, 245.)
The remaining eight insurers who did not settle filed motions for summary judgment that they had no duty to defend or indemnify the County for claims resulting from the landfill. 2 (D.I. 110, 215, 217, 219, 222, 224, 225, 227.) Only two of the issues raised in the motions for summary judgment are now before the Court. The first is the meaning of the policies’ pollution exclusion clаuse. Aetna, National Union, U.S. Liability, Home Insurance, and Continental Casualty assert the pollution exclusion clause as a ground for summary judgment. The second issue is the scope of the policies’ provision restricting coverage to “sums which the insured shall become legally obligated to pay as damages.” (D.I.109A at 1.) The insurers argue that this provision precludes coverage for claims involving injunctive relief. Aetna, National Union, Home Insurance, Twin City, INA, U.S. Fire, and Continental Casualty put forth the “injunctive relief” issue as a ground for summary judgment. For reasons set out below, the Court rejects the arguments urged by the insurers on both issues. Consequently, the Court will deny the insurers’ motions for summary judgment on the two issues before the Court.
II. Facts
This litigation involves two landfill sites used by the County. The Llangollen landfill opened in 1960 and reached capacity by the end of 1968. (D.I. 233 at 5.) The County then leased property at Tybouts Comer for use as a landfill. (D.I. 233A at 147.) The lease agreement with the owners provided that the owners would operate the Tybouts Comer landfill. (Id.) The County received a letter from the State Department of Natural Resources and Environmental Control (“DNREC") on May 18, 1972, stating that two wells near the Llangollen landfill were contaminated. (D.I. 109A at 66-67.) DNREC indicated that it thought that leachate from the Llan-gollen landfill was the most likely source of the contamination. (Id. аt 66.) DNREC required the County to take four remedial actions, such as digging a ditch around the Llangollen landfill to intercept the leachate. (Id.)
Five lawsuits relating to the two landfills were subsequently filed against the County. (D.I. 109A at 173-180, 197-205, 273-334.) Two of the lawsuits were filed by Artesian Water Company, a neighboring Company which supplied a substantial amount of the drinking water for New Castle County. (Id. at 173, 273.) In a state court action, Artesian Water Co. v. New Castle County, C.A. No. 5106 (Del. Ch.Ct. filed June 9, 1976) (“Artesian I”), Artesian alleged that groundwater supplies in the Llangollen areа had been contaminated by the escape and migration of polluting leachate from the Llangollen landfill. (Id. at 175-77.) Artesian sought injunctive relief as well as damages. (Id. at 179.) Artesian also filed an action in federal *1362 court seeking reimbursement under section 107 of the Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”), 42 U.S.C. § 9607, for costs incurred by Artesian in responding to the alleged release of hazardous substances from Llangollen. Artesian Water Co. v. New Castle Co., C.A. No. 83-854 (D.Del. filed Dec. 8, 1983) (“Artesian II”). (D.I. 109A at 280-81.) Thе United States also filed an action seeking response costs and injunctive relief under section 107 of CERCLA, as well as alleging the County’s liability under the Resource Conservation and Recovery Act (“RCRA”), 42 U.S.C. § 6973. United States v. New Castle County, C.A. No. 80-489 (D.Del. filed April 6, 1984) (D.I. 109A at 282).
Two individuals also brought actions. In Wagner v. New Castle County, C.A. No. 7008 (Del.Ch.Ct. filed Nov. 10, 1982), plaintiff sought damages and injunctive relief for contamination of the water on plaintiffs land by the County’s Tybout Comer landfill. (D.I. 109A at 202-205.) The final action, Andrews v. New Castle County, C.A. No. 84-124 (D.Del. filed March 2, 1984), sought damages and injunctive relief for injury to the plaintiff allegedly caused by the discharge of pollutants from Tyb-outs Comer landfill into plaintiffs drinking water. (D.I. 109A at 302.) The County then filed this action against its insurers requesting a declaratory judgment that the insurers were obligated to defend and indemnify the County regarding the five above mentioned lawsuits and the remedial measures taken by the County pursuant to the DNREC letter. (D.I. 1.)
III. ANALYSIS
A. Pollution Exclusion Clause
The County’s policies with five of the insurers 3 contained a provision known as a pollution exclusion clause. (D.I. 109A at 1; D.I. 216 at A-l to A-3; D.I. 218 at A-2; D.I. 220 at 30; D.I. 228A at 2.) The pollution exclusion clause stated that the policy generally did not cover damages caused by pollution. 4 However, the clause stated that the policy did cover pollution where the release, discharge or dispersal was “sudden and accidental.” (D.I. 109A at 1.) The insurers argue that the word “sudden” is unambiguous and has a temporal meaning, such as an event that occurs quickly and not gradually. (D.I. 109 at 19-30.) The insurers assert that the contamination is due to a long term process of leachate migration, and therefore is not the type of sudden pollution which the policy would cover.
The County contends that the word “sudden” as used in the exclusion clause is ambiguous. (D.I. 233 at 31.) Furthermore, the County argues that where terms of an insurance policy are ambiguous, they must be construed in favor of the insured. (Id.)
Under Delaware law, an insurance policy is a contract of adhesion.
Hallowell v. State Farm Mutual Automobile Insurance Company,
The primary dictionary definition of the word “sudden” is “happening without previous notice” or “occurring unexpectedly.” Webster’s Third New International Dictionary, at 2284 (1971);
see
Black’s Law Dic
*1363
tionary, at 1284 (1979). While other definitions indicate that the word has connotations of brevity, this only suggests that the word has more than one reasonable definition. Each of the parties cites case law supporting their respective definition of the word “sudden” in a pollution exclusion clause. Several courts have found the word “sudden” to be unambiguous, and to exclude pollution that occurs gradually.
See, e.g., Great Lakеs Container Corporation v. National Union Fire Insurance,
Both the County and the insurers offer extrinsic evidence in support of their interpretations. The County contends that the development and implementation of the pollution exclusion is proof that it was meant to eliminate coverage only for intentional or expected pollution. (D.I. 233 at 34.) The County puts forth evidence showing the interpretation of the exclusion by the Insurance Rating Board (“IRB”), an insurance industry trade association. The County asserts that the IRB interpreted the pollution exclusion clause as a clarification of the “occurrence” provision, rather than a restriction of coverage. The occurrence clause stipulates that coverage is only provided for accidents resulting in damages that are unexpected and unintended. 5 (D.I. 109A at 2.) The County contends that the IRB consistently presented the pollution exclusiоn clause to state insurance commissioners as merely a clarification.
The insurers respond by citing to comments and memoranda by IRB drafters of the exclusion clause and IRB staff members. (D.I. 301 at 12-19.) The insurers assert that this evidence confirms that the term “sudden” was intended to limit coverage to an abrupt or brief discharge of pollutants. For instance, the insurers quote the comments of a representative of the drafting committee whiсh indicate that the exclusion was not meant to address the state of mind of the polluter. (Id. at 14.)
The drafting and marketing history of the pollution exclusion does not resolve the ambiguity inherent in the meaning of the word “sudden.” If anything, the conflicting evidence cited by the parties supports the conclusion that there exists confusion over how the term should be interpreted. In addition, the materials referred to by the parties are not directly on point, as they do not discuss how the insurers marketed the exclusion specifically to the County or in the State of Delaware generally.
The insurers seek to bolster their argument by referring to other developments in insurance policies. (D.I. 109 at 27.) The insurers point to the development and marketing of “environmental impairment liability” (EIL) policies which provide coverage for non-sudden pollution. (Id. at 27, 28.) The insurers argue that if the word “sudden” meаns the same thing as “occurrence,” there would be no commercial niche for EIL policies to fill. The Court finds that there is a different reason that an EIL policy would have its own niche. As the insurers admit, EIL policies are issued on a “claims made” basis. (Id.) Such policies *1364 provide coverage for only those claims presented during the policy period. The claims may be based on occurrences which predate the policy pеriod. The comprehensive general liability (“CGL”) policies at issue here are different in that claims may be presented at any time. Some of the claims at issue in this case, for instance, were made years after the respective policies lapsed. However, under CGL policies the occurrence triggering the claim must have occurred within the policy period. (D.I. 109A at 1.)
The insurers look to the proceeding before the Delaware Chancery Court in
Artesian I
to support their characterization of the word “sudden.” (D.I. 109 at 21.) In that case, the first of two brought by Artesian Water, the County sought sovereign immunity under a Delaware statute granting immunity from suit for pollution claims that are not the result of a sudden and accidental discharge of a pollutant. 10
Del. C.
§§ 4011-12 (1982 Supp.). The County argued that the contamination of groundwater resulting from its landfills had not been sudden for purposes of thе immunity statute.
Artesian Water Co.,
C.A. No. 5106 at 21. The Chancery Court agreed.
Id.
The County distinguishes
Artesian I
by noting that that case involved interpreting the word “sudden” under a statute, whereas the present proceeding involves interpretation of an insurance contract. (D.I. 233 at 48.) This Court agrees with the County. As noted above, interpretation of an insurance contract under Delaware law involves special rules of construction.
Hallowell,
The insurers also contend that the County previously acknowledged that the pollution exclusion would foreclose coverage. (D.I. 109 at 22.) The insurers offer as evidence the statement by the County’s Risk Manager that he was “certain the suit [ Wagner v. New Castle County ] [was] ‘excluded’ due to the pollution clause.” (D.I. 109B at 206.) However, the Court finds this argument unpersuasive. The Risk Manager is a lay person and in addition he gives no explanation of how he reached his conclusion.
In summary, the Court holds that the plain meaning оf the word “sudden” as used in the pollution exclusion is ambiguous. Resolving the ambiguity in favor of the insured, the Court rules that the term “sudden” means a discharge, dispersal, release or escape of pollutants that is unexpected. 6
The Court notes that United States Liability Insurance Company issued policies to the County with significantly different pollution clauses. The Company’s policies from May 11, 1973 to July 1, 1975, contained the same pollution exclusion сlause discussed above. However, from July 1, 1975 to July 1, 1976, U.S. Liability issued a policy to the County which excluded coverage for all pollution related incidents. (D.I. 218 at A-6.) From July 1, 1976 to July 1, 1978, U.S. Liability’s policy stated that pollution was not covered “whether or not such discharge, dispersal, release or escape is sudden and accidental.” (Id. at A-7) (emphasis added). The County admits that there is no coverage under the clause used from 1976 to 1978. (D.I. 233 at 49.) In construing the clause usеd from 1975 to 1976, the only question is whether the injury alleged in the underlying claims resulted from pollution. As it is undisputed that the alleged injuries resulted from pollution, the Court will grant partial summary judgment in favor of U.S. Liability regarding its liability under policies it issued to the County from July 1, 1975 to July 1, 1978.
B. Coverage For Injunctive Relief Claims
Five of the policies at issue contained a clause stating that the insurer *1365 “will pay on behalf of the insured all sums which the insured shall become legally obligated to pay as damages because of bodily injury or property damage ... caused by an occurrence.” 7 (D.I. 109A at 1; D.I. 220 at 22, 23; D.I. 224 at 3; D.I. 226 at 4; D.I. 228A at 2.) Two of the remaining policies, issued by National Union and Twin City, had language conceded to be substantially similar. (D.I. 216 at 6, A-1; D.I. 223 at 2, A-1.) The second issue before the Court is the scope of the word “damages” in the above provision.
The insurers argue that “damages” do not include claims for injunctive relief or for other equitable relief such as cleanuр costs under CERCLA or RCRA. (D.I. 109 at 36; D.I. 220 at 22-23; D.I. 228 at 31.) Of the six underlying claims for which the County seeks coverage, the insurers argue that four of the claims are not for damages. (D.I. 300 at 20.) These four claims are: Artesian I, Artesian II, United States v. New Castle County, and the DNREC demand for remedial action at Llangollen landfill. 8
To the extent that any of the policies defined the word “damages,” the definitions given in the policies are of little help.
9
(D.I. 109A at A-2; D.I. 223 at 2; D.I. 226 at 2.) The insurers argue that thеre is no coverage when the underlying claim is for equitable relief, as such relief does not constitute damages under the policy.
See Aetna Casualty & Surety Co. v. Hanna,
This Court notes that under Delaware law, language in an insurance policy should be given its “ordinary, usual meaning” when possible.
Johnston v. Tally Ho, Inc.,
This interpretation of the word “damages” finds support in cases that consider cleanup costs due to pollution.
See Continental Ins. v. Northeastern Pharmaceutical & Chemical,
The insurers also contend that a governmеnt suit for response costs under CERC-LA is not covered by the policies because the government did not suffer “property damage.” The insurers cite the Fourth Circuit decision in
Mraz v. Canadian Universal Ins. Co.
for support.
This Court disagrees with the holding and reasoning of Mraz. To trigger coverage under the policies, the Federal Government in United States v. New Castle County need not allege that it suffered property damage. Under the terms of the policy, the underlying claim need only require the insured “to pay damages because of bodily injury or property damage.” (D.I. 109A at 1) (emphasis added). The complaint in United States v. New Castle County clearly states claims for remediаl action to remedy property damage, in this case harm to surface and ground waters. (D.1.109B at 282-99.) The Court finds that all of the underlying lawsuits at issue are included within the policies' definition of damages.
A question remains regarding the funds expended by the County to comply with the actions required by DNREC. As the DNREC letter was prompted by contamination of a neighbor’s well, it appears that there was an injury and an infringement of the neighbor’s legal rights. The additional issue is whether the DNREC letter legally obligated the County to incur costs for remedial actions. While DNREC did not file or threaten to file a legal proceeding, DNREC did “require” the County to take specific actions. (D.I. 109B at 123.) Under DelCode Ann. tit. 7, § 6309 (1986), DNREC had the power to commence a civil action to enforce corrective measures necessary to protect the environment. Since the required remedial actions were ultimately enforcеable in a legal proceeding, they constituted sums that the County was legally obligated to pay as damages. Therefore, the Court holds that the insurers’ duty to indemnify the County for damages includes money expended by the County to comply with the demand in the DNREC letter.
As the Court holds that insofar as" the two issues now before it, the insurers have a duty to indemnify the County for the six underlying claims, the Court also concludes that regarding these two questions of law the insurers аre obligated to defend the County in the five underlying lawsuits. Under Delaware Law an insurer's duty to defend under the policy is broader than its duty to indemnify.
*1367
Charles E. Brohawn & Bros., Inc. v. Employers Commercial Union Insurance Co.,
IV. CONCLUSION
The word “sudden” in the policies’ pollution exclusion clause is ambiguous. Under Delaware law, such an ambiguity in an insurance policy must be construed in favor of the insured. The policies’ provision stating that the insurers will only pay “sums which the insured shall become legally obligated to pay as damages” must be given its ordinary meaning and should not be given a narrow, technical definition. Consequently, claims for injunctive relief, statutory response costs, or other required remedial actions enforceable in a legal proceeding come within that provision. All the insurers’ motions for summary judgment will be denied except for the motion by United States Liability Insurance Company. U.S. Liability will be granted partial summary judgment for the three years (1976-1978) in which its policies included an absolute pollution exclusion.
Judgment will be entered in conformity with this Memorandum Opinion.
Notes
. The four insurers who settlеd were: Zurich Insurance Company, New Hampshire Insurance Company, Continental Insurance Company, and Hartford Accident and Indemnity Company.
. The eight insurers moving for summary judgment are: Aetna Casualty and Surety Company, National Union Fire Insurance Company, United States Liability Insurance Company, Home Insurance Company, Twin City Fire Insurance Company, Insurance Company of North America (“INA”), United States Fire Insurance Company, and Continental Casualty Company.
. Aetna, National Union, U.S. Liability, Home Insurance, and Continental Casualty.
. The pollution exclusion clause stated in full:
It is agreed that the insurance does not apply to bodily injury or property damage arising out of the discharge, dispersal, release or escape of smoke, vapors, soot, fumes, acids, alkalis, toxic chemicals, liquids or gases. waste materials or other irritants, contaminants or pollutants into or upon land, the atmosphere or any watercourse or body of water, but this exclusion does not apply if such discharge, dispersal, release or escape is sudden and accidental.
(D.I. 109A at 1.)
. The policies covered only damages caused by an “occurrence." The policies defined an occurrence as: "an accident, including injurious exposure to conditions, which results, during the policy period, in bodily injury or property damage neither expected nor intended from the standpoint of the insured." (D.1.109A at 2.)
. The County asserts two other arguments with regard to the pollution exclusion. The County contends that the IRB had marketed the exclusion as a clarification, and that the insurers are estopped from now taking a contradictory position. (D.I. 233 at 36.) The County also argues that the exclusion is intended to preclude coverage only for "actual” polluters. (Id. at 37.) As the Court holds for the County on the ambiguity issue, it need not reach these two other arguments.
. The insurers with policies using the above language are Aetna, Home Insurance, INA, U.S. " Fire and Continental Casualty.
. Only Continental Casualty Company argues in its brief that the fifth claim, Andrews v. New Castle County, is an action solely for injunctive relief. The other insurers concede either explicitly or implicitly (by omission) that Andrews involves a claim for damages. (D.I. 220 at 22 n. 67; D.I. 109 at 37; D.I. 334 at 45.) As to the sixth claim, Wagner v. New Castle County, the Home Insurance Company conceded at oral argument that the Wagner claim seeks damages and consequently is not at issue with regard to coverage for injunctive relief. (D.I. 334 at 45.) As the Home was arguing on behalf of all the insurers on this issue, and none of the insurers objected to the Home’s treatment of the Wagner claim, the Court will assume that this is the position of all the insurers.
.A representative definition in one of the policies stated: "‘damages' includes damages for death and for care and loss of services resulting from bodily injury and damages for loss of use of property resulting from property damage." (D.I. 109A at 2.)