S.C. Code Ann. § 56-5-2933
(A) It is unlawful for a person to drive a motor vehicle within this State while his alcohol concentration is eight one-hundredths of one percent or more. A person who violates the provisions of this section is guilty of the offense of driving with an unlawful alcohol concentration and, upon conviction, entry of a plea of guilty or of nolo contendere, or forfeiture of bail must be punished as follows:
(I) A person charged for a violation of Section 56-5-2930 may be prosecuted pursuant to this section if the original testing of the person's breath or collection of other bodily fluids was performed within two hours of the time of arrest and reasonable suspicion existed to justify the traffic stop. A person may not be prosecuted for both a violation of Section 56-5-2930 and a violation of this section for the same incident. A person who violates the provisions of this section is entitled to a jury trial and is afforded the right to challenge certain factors including the following:
(4) whether the person consented to taking a test pursuant to Section 56-5-2950, and whether the:
(J) Nothing contained in this section prohibits the introduction of:
(2) any evidence that may corroborate or question the validity of the breath or bodily fluid test result including, but not limited to:
(4) any other evidence of the state of a person's faculties to drive which would call into question the results of a breath or bodily fluid test.
At trial, a person charged with a violation of this section is allowed to present evidence relating to the factors enumerated above and the totality of the evidence produced at trial may be used by the jury to determine guilt or innocence. A person charged with a violation of this section must be given notice of intent to prosecute under the provisions of this section at least thirty calendar days before his trial date.