Riley, J.
In this case, we are asked to interpret and apply the pollution-exclusion clause found in the comprehensive general liability policy of All[201]*201state Insurance Company.1 The resolution of this issue requires us to answer two questions: (1) is the phrase "sudden and accidental” which appears in the pollution-exclusion clause and which creates an exception to the exclusion, unambiguous, and (2), if unambiguous, what is the proper meaning of the phrase "sudden and accidental.”
We hold that the phrase "sudden and accidental” is unambiguous. Furthermore, we find that the definition of "sudden” includes a temporal element as well as a sense of the unexpected, and that "accidental” means unexpected and unintended.
We, therefore, find that the Court of Appeals erred in holding that the pollution-exclusion clause did not apply under the facts of this case. Accordingly, we reverse the decision of the Court of Appeals and find, as a matter of law, that the pollution-exclusion clause applies and, therefore, plaintiff, The Upjohn Company, is not entitled to coverage under defendant Allstate’s policy.
I. FACTS AND PROCEEDINGS
On August 13, 1982, The Upjohn Manufacturing Company (umc), a Puerto Rico-based division of The Upjohn Company, began its annual production of clindamycin, an antibiotic. Two toxic byproducts were produced in the clindamycin campaign. These chemicals were pumped into an underground storage tank designated fa-129 which had a ten thousand gallon capacity.
[202]*202Each weekday of the year, an Upjohn employee measured the level of by-product in the tank. The employee recorded the measurement on a tank farm inventory sheet and turned the sheet over to his supervisor. Each day’s sheet was reviewed, and compared with previous days’ sheets which were kept on file at the umc facility. This was Upjohn’s standard procedure.
Prior to August 16, 1982, the tank-level measurements remained constant at ten inches or 475 gallons. However, on August 16, 1982, the same day that Upjohn had pumped its first batch of approximately seventeen hundred gallons of the by-product into tank fa-129, the tank-level measurement read three inches or eighty gallons. Despite this discrepancy in the tank-level measurement, Upjohn continued, over the next few weeks, to pump eight more batches of by-product into tank fa-129. Approximately seventeen hundred gallons of by-product were added to tank fa-129 on each of the following days: August 18, 19, 24, 25, 26, 30 and 31, and on September 1, 1982. The daily tank measurement readings continued to show levels which did not coincide with the amount of by-product which was pumped into tank FA-129.2
[203]*203On September 3, 1982, Upjohn completed its monthly audit of the tank-level inventory records. Since the tank-level measurements did not coincide with what was intended to be in tank fa-129, no additional quantities of the by-product were pumped into the tank.
It was determined that tank fa-129 had three holes in it due to corrosion. Upjohn estimated that approximately fifteen thousand gallons of the toxic by-product leaked from the tank since the first batch of by-product was pumped into tank fa-129.
[204]*204On January 11, 1985, Upjohn3 filed suit against defendant Allstate Insurance Company,4 claiming that Upjohn was covered under Allstate’s comprehensive general liability policy for damages and expenses arising out of the leaking underground storage tank fa-129.
On September 24, 1986, Upjohn moved for summary disposition. The court held that there was coverage under the policy and that coverage was not precluded by the pollution-exclusion clause contained in the policy. The Court, therefore, granted Upjohn’s motion for summary disposition.
The Court of Appeals affirmed the trial court’s grant of summary disposition. Relying on the definition of "sudden and accidental” as stated in Jonesville Products, Inc v Transamerica Ins Group, 156 Mich App 508, 512; 402 NW2d 46 (1986), the Court held that "even a continuous discharge of chemicals may be both accidental (i.e., unintended) and sudden (i.e., unexpected) and, therefore, outside the pollution exclusion.” The Court held that the trial court properly concluded that there was no genuine issue of material fact that the leak was "sudden and accidental.” Upjohn Co v New Hampshire Ins Co, 178 Mich App 706, 716; 444 NW2d 813 (1989).
On July 13, 1990, this Court granted Allstate’s leave to appeal and ordered that it be consolidated with Polkow v Citizens Ins Co of America and Protective Nat'l Ins Co of Omaha v City of Woodhaven.
II. ANALYSIS
The Allstate Comprehensive General Liability [205]*205Policy is subject to several exclusions which limit the broad coverage otherwise provided under the policy.6 The policy’s pollution exclusion provides:
[206]*206This policy shall not apply:—
* * *
(f) to bodily injury or property damage arising out of the discharge, dispersal, release or escape of smoke, vapors, soot, fumes, acids, alkalies, toxic chemicals, liquids or gaseous 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.
The pollution exclusion does not apply to releases which are "sudden and accidental.” The question presented in this case is whether the release of the chemical by-product from tank fa-129 was "sudden and accidental,” and, therefore, whether the pollution-exclusion clause applies, thus, precluding coverage under the policy.
"Initially, in determining whether a policy applies, we first must determine whether the policy is clear and unambiguous on its face.” Metropolitan Property & Liability Ins Co v DiCicco, 432 Mich 656, 665; 443 NW2d 734 (1989) (opinion of Riley, C.J.). We cannot create an ambiguity where none exists. Edgar’s Warehouse, Inc v United [207]*207States Fidelity & Guaranty Co, 375 Mich 598; 134 NW2d 746 (1965). Similarly, we reject the temptation to rewrite the plain and unambiguous meaning of the policy under the guise of interpretation. Rather, we enforce the terms of the contract as written. Eghotz v Creech, 365 Mich 527, 530; 113 NW2d 815 (1962). If the language of the° policy is unambiguous, it must be considered "in its plain and easily understood sense.” 432 Mich 710. See Wertman v Michigan Mutual Liability Co, 267 Mich 508, 510; 255 NW 418 (1934).
We find persuasive the recent opinions of the United States Court of Appeals for the Sixth Circuit which find the terms of the pollution exclusion to be unambiguous. United States Fidelity & Guaranty Co v Star Fire Coals, Inc, 856 F2d 31 (CA 6, 1988); United States Fidelity & Guaranty Co v Murray Ohio Mfg Co, 875 F2d 868 (CA 6, 1989); FL Aerospace v Aetna Casualty & Surety Co, 897 F2d 214 (CA 6, 1990).7
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Riley, J.
In this case, we are asked to interpret and apply the pollution-exclusion clause found in the comprehensive general liability policy of All[201]*201state Insurance Company.1 The resolution of this issue requires us to answer two questions: (1) is the phrase "sudden and accidental” which appears in the pollution-exclusion clause and which creates an exception to the exclusion, unambiguous, and (2), if unambiguous, what is the proper meaning of the phrase "sudden and accidental.”
We hold that the phrase "sudden and accidental” is unambiguous. Furthermore, we find that the definition of "sudden” includes a temporal element as well as a sense of the unexpected, and that "accidental” means unexpected and unintended.
We, therefore, find that the Court of Appeals erred in holding that the pollution-exclusion clause did not apply under the facts of this case. Accordingly, we reverse the decision of the Court of Appeals and find, as a matter of law, that the pollution-exclusion clause applies and, therefore, plaintiff, The Upjohn Company, is not entitled to coverage under defendant Allstate’s policy.
I. FACTS AND PROCEEDINGS
On August 13, 1982, The Upjohn Manufacturing Company (umc), a Puerto Rico-based division of The Upjohn Company, began its annual production of clindamycin, an antibiotic. Two toxic byproducts were produced in the clindamycin campaign. These chemicals were pumped into an underground storage tank designated fa-129 which had a ten thousand gallon capacity.
[202]*202Each weekday of the year, an Upjohn employee measured the level of by-product in the tank. The employee recorded the measurement on a tank farm inventory sheet and turned the sheet over to his supervisor. Each day’s sheet was reviewed, and compared with previous days’ sheets which were kept on file at the umc facility. This was Upjohn’s standard procedure.
Prior to August 16, 1982, the tank-level measurements remained constant at ten inches or 475 gallons. However, on August 16, 1982, the same day that Upjohn had pumped its first batch of approximately seventeen hundred gallons of the by-product into tank fa-129, the tank-level measurement read three inches or eighty gallons. Despite this discrepancy in the tank-level measurement, Upjohn continued, over the next few weeks, to pump eight more batches of by-product into tank fa-129. Approximately seventeen hundred gallons of by-product were added to tank fa-129 on each of the following days: August 18, 19, 24, 25, 26, 30 and 31, and on September 1, 1982. The daily tank measurement readings continued to show levels which did not coincide with the amount of by-product which was pumped into tank FA-129.2
[203]*203On September 3, 1982, Upjohn completed its monthly audit of the tank-level inventory records. Since the tank-level measurements did not coincide with what was intended to be in tank fa-129, no additional quantities of the by-product were pumped into the tank.
It was determined that tank fa-129 had three holes in it due to corrosion. Upjohn estimated that approximately fifteen thousand gallons of the toxic by-product leaked from the tank since the first batch of by-product was pumped into tank fa-129.
[204]*204On January 11, 1985, Upjohn3 filed suit against defendant Allstate Insurance Company,4 claiming that Upjohn was covered under Allstate’s comprehensive general liability policy for damages and expenses arising out of the leaking underground storage tank fa-129.
On September 24, 1986, Upjohn moved for summary disposition. The court held that there was coverage under the policy and that coverage was not precluded by the pollution-exclusion clause contained in the policy. The Court, therefore, granted Upjohn’s motion for summary disposition.
The Court of Appeals affirmed the trial court’s grant of summary disposition. Relying on the definition of "sudden and accidental” as stated in Jonesville Products, Inc v Transamerica Ins Group, 156 Mich App 508, 512; 402 NW2d 46 (1986), the Court held that "even a continuous discharge of chemicals may be both accidental (i.e., unintended) and sudden (i.e., unexpected) and, therefore, outside the pollution exclusion.” The Court held that the trial court properly concluded that there was no genuine issue of material fact that the leak was "sudden and accidental.” Upjohn Co v New Hampshire Ins Co, 178 Mich App 706, 716; 444 NW2d 813 (1989).
On July 13, 1990, this Court granted Allstate’s leave to appeal and ordered that it be consolidated with Polkow v Citizens Ins Co of America and Protective Nat'l Ins Co of Omaha v City of Woodhaven.
II. ANALYSIS
The Allstate Comprehensive General Liability [205]*205Policy is subject to several exclusions which limit the broad coverage otherwise provided under the policy.6 The policy’s pollution exclusion provides:
[206]*206This policy shall not apply:—
* * *
(f) to bodily injury or property damage arising out of the discharge, dispersal, release or escape of smoke, vapors, soot, fumes, acids, alkalies, toxic chemicals, liquids or gaseous 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.
The pollution exclusion does not apply to releases which are "sudden and accidental.” The question presented in this case is whether the release of the chemical by-product from tank fa-129 was "sudden and accidental,” and, therefore, whether the pollution-exclusion clause applies, thus, precluding coverage under the policy.
"Initially, in determining whether a policy applies, we first must determine whether the policy is clear and unambiguous on its face.” Metropolitan Property & Liability Ins Co v DiCicco, 432 Mich 656, 665; 443 NW2d 734 (1989) (opinion of Riley, C.J.). We cannot create an ambiguity where none exists. Edgar’s Warehouse, Inc v United [207]*207States Fidelity & Guaranty Co, 375 Mich 598; 134 NW2d 746 (1965). Similarly, we reject the temptation to rewrite the plain and unambiguous meaning of the policy under the guise of interpretation. Rather, we enforce the terms of the contract as written. Eghotz v Creech, 365 Mich 527, 530; 113 NW2d 815 (1962). If the language of the° policy is unambiguous, it must be considered "in its plain and easily understood sense.” 432 Mich 710. See Wertman v Michigan Mutual Liability Co, 267 Mich 508, 510; 255 NW 418 (1934).
We find persuasive the recent opinions of the United States Court of Appeals for the Sixth Circuit which find the terms of the pollution exclusion to be unambiguous. United States Fidelity & Guaranty Co v Star Fire Coals, Inc, 856 F2d 31 (CA 6, 1988); United States Fidelity & Guaranty Co v Murray Ohio Mfg Co, 875 F2d 868 (CA 6, 1989); FL Aerospace v Aetna Casualty & Surety Co, 897 F2d 214 (CA 6, 1990).7
We conclude that when considered in its plain and easily understood sense, "sudden” is defined with a "temporal element that joins together conceptually the immediate and the unexpected.” Star Fire Coals, supra at 34. The common, everyday understanding of the term "sudden” is " 'happening, coming, made or done quickly, without warning or unexpectedly; abrupt.’ ” FL Aerospace, supra at 219. "Accidental” means "[o]ccur-ring unexpectedly and unintentionally; by [208]*208chance.” The American Heritage Dictionary: Second College Edition, p 72. We, therefore, reject the definition of "sudden and accidental” as set forth by the Michigan Court of Appeals in Jonesville. Thus, we find that the terms "sudden” and "accidental” used in the pollution-exclusion clause are unambiguous.8
[209]*209Having concluded that the phrase "sudden and accidental” is not ambiguous, we now turn to the proper application of the pollution-exclusion clause.
Under the facts of this case, we conclude that the release of material from tank fa-129 could not possibly be considered "sudden” because the release of by-product from tank fa-129 was not unexpected by Upjohn.9
[210]*210Each weekday of the year, tank-level measurements were taken by an Upjohn employee for all the tanks in the tank farm. The employee used a calibrated stick to measure the level of material in each tank. The employee then recorded the measurement of each tank on the tank farm inventory sheet for that day. This sheet was then turned into the employee’s supervisor. Each day’s sheet was reviewed and compared with previous days’ sheets which were kept on file at the umc facility. Umc has record retention schedules on all such information. These tank-level measurements were taken to determine what the level of material was in each tank and, thus, when each tank was full and needed to be emptied for disposal purposes. Such information indicated when a tank was too full to allow another batch of material to be pumped into it.
Prior to August 16, 1982, the daily tank-level measurements for tank pa-129 remained constant at ten inches or 475 gallons. This is consistent with the fact that when tank fa-129 was not being [211]*211actively used, as was the case before August 16, 1982, there is an accumulation of ten inches of material or 475 gallons in the tank because that is about all that is capable of being pumped out of the tank. On August 16, 1982, the same day that the first batch of seventeen hundred gallons of byproduct was received, the tank-level measurement was three inches or eighty gallons. Despite this discrepancy, Upjohn continued its production of clindamycin and added eight more batches, approximately 13,600 gallons, of the by-product to the ten thousand gallon tank. The tank level measurements taken from August 16, 1982, until early September 1982, when tank fa-129 was removed from active use, reflected that there was an unaccounted loss of the by-product.
In early September 1982, after a monthly audit of tank levels by Upjohn indicated that there was a leak in tank fa-129, no additional quantities of the by-product were pumped into the tank. It was later determined that the discrepancies in the tank-level readings were due to several holes in tank fa-129 which caused the tank to continuously leak chemicals into the ground from August 16, 1982, through September 7, 1982. Upjohn states that anywhere from twelve thousand gallons to eighteen thousand gallons of by-product leaked from tank fa-129 during the period.
Upjohn claims that although the tank level measurements for tank fa-129 were unusually low on August 16, 1982, and although a large discrepancy continued to exist in the measurements that were taken, recorded, and reviewed by Upjohn employees, Upjohn did not have enough information to expect that the chemical by-product that was in the tank and was continuously being added to the tank was escaping from a leak in the tank. Upjohn claims that they did not expect that there [212]*212was a release of the by-product from tank fa-129 until a monthly audit of tank levels that was completed in early September 1982 indicated a leak. During this audit all the previously recorded and reviewed tank farm inventory sheets were reviewed by Upjohn’s accounting people. It is Upjohn’s contention that only after all relevant figures were compared, that umc could even have expected that by-product was missing from Upjohn’s production and storage system. Upjohn claims that the unusually low tank-level measurement for tank fa-129 taken on August 16, 1982, did not lead them to expect that chemical byproduct was escaping from the tank because reduced tank levels did not themselves indicate a leak in the tank. Upjohn claims that the byproduct could have been accidentally or intentionally diverted to other tanks, production could have been interrupted, or materials could have been intentionally removed from the tank for disposal.
Upjohn’s claims cannot be reasonably supported by the record in this case. Although reduced tank levels may not themselves indicate a leak in tank fa-129, the fact that the tank level on August 16, 1982, measured three inches or eighty gallons precludes this Court from finding anything other than that Upjohn must have expected a leak in tank fa-129. Thus, we find, as a matter of law, that the Upjohn Company had sufficient information available to it on August 16, 1982, to expect that a chemical by-product was escaping from a leak in tank fa-129.10 Furthermore, we find that Upjohn [213]*213had sufficient information available to it to expect that such release of the by-product was occurring and would continue to occur until they stopped using the tank.11
In determining the knowledge attributable to a company, the court in United States v TIME-DC, Inc, 381 F Supp 730, 738 (WD Va, 1974), held:
A corporation can only act through its employees and, consequently, the acts of its employees, within the scope of their employment, constitute the acts of the corporation. Likewise, knowledge acquired by employees within the scope of their employment is imputed to the corporation. In consequence, a corporation cannot plead innocence by asserting that the information obtained by several employees was not acquired by any one individual employee who then would have comprehended its full import. Rather, the corporation is considered to have acquired the collective knowl[214]*214edge of its employees and is held responsible for their failure to act accordingly.
The Michigan Court of Appeals adopted this reasoning in People v American Medical Centers of Michigan, Ltd, 118 Mich App 135; 324 NW2d 782 (1982).
In Gordon Sel-Way, Inc v Spence Bros, Inc, 177 Mich App 116, 124; 440 NW2d 907 (1989),12 the Court recognized that "the combined knowledge of employees may be imputed to a corporation” and stated:
We agree with this rule and adopt the standard for imputed collective knowledge set forth in Copeman Laboratories Co v General Motors Corp, 36 F Supp 755, 762 (ED Mich, 1941):
"When a person representing a corporation is doing a thing which is in connection with and pertinent to that part of the corporation business which he is employed, or authorized or selected to do, then that which is learned or done by that person pursuant thereto is in the knowledge of the corporation. The knowledge possessed by a corporation about a particular thing is the sum total of all the knowledge which its officers and agents, who are authorized and charged with the doing of the particular thing acquire, while acting under and within the scope of their authority.” [Id. at 124-125.]
We adopt this reasoning and apply it in this case. This Court concludes that the Upjohn Company had sufficient information available to it, through its” various employees and through its records kept at the umc facility, to allow us to find, as a matter of law, that the release of chemi[215]*215cal by-product from tank fa-129 was expected by the Upjohn Company.13
III. CONCLUSION
In summary, under the imputed-collective-knowledge standard the Upjohn Company cannot claim that it did not expect on August 16, 1982, and every day thereafter, the release of by-product from tank fa-129. Furthermore, we reject Upjohn’s assertion that the information obtained by several of its employees was not acquired by any individual employee who then would have comprehended its full import, and that only after a monthly audit of the same information could it have expected the release.14 Rather, the Upjohn Company is consid[216]*216ered to have acquired the collective knowledge of its employees, the same collective knowledge which the monthly audit revealed was available to Upjohn as early as August 16, 1982. Therefore, Upjohn must be held to have expected the release of by-product from tank fa-129 as early as August 16, 1982.
Since the release of chemical by-product was not unexpected, as a matter of law it cannot be "sudden and accidental.”15 Therefore, the pollution-[217]*217exclusion clause does apply, and the Upjohn Company is not entitled to coverage under the Allstate Insurance Company policy. Accordingly, we reverse the decision of the Court of Appeals.
Boyle, Griffin, and Mallett, JJ., concurred with Riley, J.
First Distillate Received