fl We are asked to identify the unit of prosecution for the crime of possessing “a stolen access device” in violation of RCW 9A.56.160(l)(c). In addition, we are asked whether respondent Shelly Ose’s exceptional sentence violated the sixth amendment to the United States Constitution as interpreted in Blakely v. Washington,
¶2 On January 30, 2002, after a series of car prowlings and use of stolen credit cards, Ms. Ose pleaded guilty to 25 counts of possessing “a stolen access device”
¶3 On June 24, 2004, while Ms. Ose’s appeal was pending, the United States Supreme Court held that the Sixth Amendment requires any fact used to increase a defendant’s sentence beyond the standard sentencing range (excluding prior convictions) be proved beyond a reasonable doubt to a jury or admitted by the defendant. Blakely,
¶4 The State petitioned this court for review, which we granted on July 12, 2005. State v. Ose, noted at
ISSUES
¶5 (1) What is the unit of prosecution for possessing “a stolen access device” in violation of RCW 9A.56.160(l)(c)?
ANALYSIS
¶7 Standard of Review. This court reviews de novo whether the lower court correctly identified the unit of prosecution in a statute. State v. Graham,
¶8 Unit of Prosecution. The United States Constitution provides that no person shall “be subject for the same offense to be twice put in jeopardy of life or limb.” U.S. Const, amend. V. Similarly, the Washington State Constitution provides that “[n]o person shall be . . . twice put in jeopardy for the same offense.” Wash. Const, art. I, § 9. These two clauses provide identical protection. State v. Tvedt,
¶9 While a unit of prosecution issue “is one of constitutional magnitude on double jeopardy grounds, the issue ultimately revolves around a question of statutory interpretation and legislative intent.” State v. Adel,
¶10 Here, Ms. Ose pleaded guilty to 25 violations of subsection (c) of the following statute:
*145 A person is guilty of possessing stolen property in the second degree if:
(a) He or she possesses stolen property other than a firearm as defined in RCW 9.41.010 which exceeds two hundred fifty dollars in value but does not exceed one thousand five hundred dollars in value; or
(b) He or she possesses a stolen public record, writing or instrument kept, filed, or deposited according to law; or
(c) He or she possesses a stolen access device; or
(d) He or she possesses a stolen motor vehicle of a value less than one thousand five hundred dollars.
RCW 9A.56.160(1). In interpreting the above statute, Division Three, relying on State v. McReynolds,
¶11 The State argues that Division Three’s reliance on McReynolds was misplaced and that this court should adopt Division Two’s reasoning in State v. Douglas,
¶12 We agree with the Douglas court that the legislature unambiguously defined the unit of prosecution in RCW 9A.56.160(l)(c) as one count per access device by using the indefinite article “a” in the clause “a stolen access device.” Webster’s provides the following definition for “a”:
1 — used as a function word before most singular nouns other than proper and mass nouns when the individual in question is undetermined, unidentified, or unspecified. . . ; used with a plural noun only if few, very few, good many, or great many is interposed.
Webster’s Third New International Dictionary 1 (2002). Thus, because the word “a” is used only to precede singular nouns except when a plural modifier is interposed, the legislature’s use of the word “a” before “stolen access device” unambiguously gives RCW 9A.56.160(l)(c) the plain meaning that possession of each stolen access device is a separate violation of the statute.
¶13 Ms. Ose’s attempt to read ambiguity into the statute is unpersuasive. Relying on an older dictionary, Ms. Ose defines “a” as “not any particular or certain one of a class or group: a maw, a chemical', a house.” Resp’t’s Suppl. Br. at 11 (citing Webster’s Encyclopedic Unabridged Dictionary of the English Language (1996)). Applying this definition, Ms. Ose argues that “a stolen access device” should be read as “any stolen access device” and, from here, “one could logically argue that any number of stolen access devices would constitute only one unit of prosecution.” Id. at 11-12.
¶14 Perhaps “one could logically argue” that “a” means “any number”; however, a statute is “not ambiguous merely because different interpretations are conceivable.” Id.', State v. Tili,
¶15 Moreover, this court has consistently interpreted the legislature’s use of the word “a” in criminal statutes as authorizing punishment for each individual instance of criminal conduct, even if multiple instances of such conduct occurred simultaneously. For example, in Westling, we considered the second degree arson statute and the difference between the word “a” and the word “any.” The statute at issue in Westling provided that “[a] person is guilty of arson in the second degree if he knowingly and maliciously causes a fire or explosion which damages a building, or any . . . automobile.” RCW 9A.48.030(1) (emphasis added). The Westling court held that because the legislature used the words “a fire,” the unit of prosecution for the arson statute was per fire caused by the defendant.
f 16 Similarly, in State v. Root,
f 17 Likewise, in State v. DeSantiago,
¶18 Most recently, in Graham, we considered the unit of prosecution for the reckless endangerment statute, which
¶19 When this court engages in statutory construction, we presume that the legislature is aware of our prior interpretations of its enactments. Tili,
¶20 Exceptional Sentence. In 2004, while Ms. Ose’s appeal was pending, the United States Supreme Court ruled that the Sixth Amendment requires any fact used to increase a defendant’s sentence beyond the standard sentencing range (excluding prior convictions) to be proved beyond a reasonable doubt to a jury or admitted by the defendant. Blakely,
CONCLUSION
¶22 We reverse the Court of Appeals and hold that the legislature unambiguously defined the unit of prosecution for violations of RCW 9A.56.160(l)(c) as possession of each access device. Therefore, Ms. Ose’s multiple convictions for possession of multiple access devices did not violate the double jeopardy prohibition.
¶23 However, we vacate Ms. Ose’s sentence and remand for resentencing within the standard sentencing range. The sentencing court’s imposition of an exceptional sentence violated Blakely because the facts used in justifying the exceptional sentence were neither proved to a jury nor admitted by Ms. Ose.
Alexander, C.J., and C. Johnson, Madsen, Sanders, Bridge, Chambers, Fairhurst, and J.M. Johnson, JJ., concur.
Notes
An “ ‘[ajccess device’ ” is defined as “any card, plate, code, account number, or other means of account access that can be used alone or in conjunction with another access device to obtain money, goods, services, or anything else of value, or that can be used to initiate a transfer of funds, other than a transfer originated solely by paper instrument.” RCW 9A.56.010(1).
