Defendant appeals his conviction for driving while-under the influence of intoxicating liquor, 28 V.S.A. § 1201(a)(2). He claims (1) the State did not meet its burden to prove, beyond a reasonable doubt, that he was under the influence of intoxicating liquor; (2) the officer who administered the “breath test” lacked sufficient grounds to request a test; (3) the test-results should not have been admitted because an evidentiary chain of custody was not sufficiently established; and (4) the-breath test results should not have been admitted because they were unfairly prejudicial. We disagree and affirm.
I.
With respect to defendant’s first issue, the evidence, taken in the light most favorable to the State,
State v. Lupien,
Officer LaFountain of the South Burlington Police Department investigated the accident. Because it was cold, he asked the operators of the two cars to sit with him in the police car. At that time he noted that defendant’s speech was slurred, and he detected the odor of alcohol on defendant’s breath. He informed defendant that he could smell intoxicants on defendant’s breath and asked him to step outside. Outside the car, defendant said he had not been drinking at all. When defendant removed his sunglasses, the officer saw that defendant’s eyes were bloodshot and glassy and his pupils dilated. Stepping close to defendant, the officer confirmed the odor of alcohol on ■defendant’s breath. Defendant then said he had consumed no alcohol since the previous night. LaFountain also noted that ■defendant was unsteady on his feet.
Officer LaFountain then told defendant a breath test would he requested, and he radioed for another officer to administer "the test while he continued his accident investigation. Officer Rhodes arrived and took defendant to the nearby South Burlington Police Station, where she administered the test, subsequently wrapping the information sheet and the sample box in ■a rubber band for transfer to the state laboratory. At the lab, the materials were opened and analyzed, yielding a result of .11 ratio of alcohol to body weight, which, when related back to "the time of operation, provided a reading of .12 percent.
On the basis of this evidence, a reasonable jury could •conclude beyond a reasonable doubt that defendant was driving while under the influence.
State
v.
Derouchie,
II.
Although defendant did not move before trial to suppress the test results, he claimed at trial that Officer Rhodes had no “reasonable ground” to administer the test, and therefore vio *506 lated 23 V.S.A. § 1202(a) (Supp. 1984). That statute provides in part:
A sample of breath shall be taken only by a law enforcement officer who has been certified ... to operate the breath testing equipment being employed whenever a state police officer or a law enforcement officer who has been certified by the Vermont criminal justice training council . . . has reasonable grounds to believe that the person was operating, attempting to operate or was in actual physical control of any vehicle while under the influence of intoxicating liquor.
The decision to administer the breath test was reached not by Officer Rhodes, but by Officer LaFountain. Faced with conflicting duties, LaFountain delegated administration of the test to Officer Rhodes, while he concluded his accident investigation.
The purpose of the “reasonable grounds” language in 23 V.S.A. § 1202 (a) is simply to require that a certain amount of evidence exist before an officer may take a breath test. See
McGarry
v.
Costello,
III.
Defendant next argues that the State did not establish a chain of custody of the test sample between the time when the test was taken by Officer Rhodes and the time the sample was analyzed. We disagree. This Court has previously held that “[a]Ithough there is a gap in that recital, . . . [t]he chain need not be perfectly established. 'The circumstances need only establish reasonable assurance of the identity of the sample.’
State
v.
Ross,
IV.
Finally, defendant points out that this was a case under 23 V.S.A. § 1201 (a) (2), based upon “physical manifestations capable of observation . . . ,”
Carmody, supra,
Defendant’s theory, that numerical breath test results are unfairly prejudicial in a § 1201 (a) (2) case, was addressed by this Court in
State
v.
Carter,
Title 23 V.S.A. § 1204(a) (3) provides that, for a person alleged to have been operating, attempting to operate or in actual physical control of a vehicle on a highway,
If there was at that time 0.10 per cent or more by weight of alcohol in the person’s blood or breath, as shown by analysis of the person’s blood or breath, it shall be presumed that the person was under the influence of intoxicating liquor in violation of section 1201(a) (2) ....
*508
In
State
v.
Dacey,
Here, the trial judge instructed the jury that, as a result of the test evidence, it was “permitted to make” or “free to disregard” an inference that defendant was under the influence at the time of operation. The court also stated that defendant could only be convicted if he were proven guilty beyond a reasonable doubt of each element of the offense, and the court properly defined those elements for the jury. Under these circumstances, we conclude that the trial court did not abuse its discretion in admitting the numerical breath test result.
Affirmed.
