(a) Sample collection and testing for alcohol impairment and drugs under AS 23.10.600 - 23.10.699 shall be performed under reasonable and sanitary conditions. The person collecting samples shall document the sample, including labeling the sample to preclude to the extent reasonable the possibility of misidentification of the person tested in relation to the test result provided, and shall provide the person to be tested with an opportunity to provide medical information that may be relevant to the test, including identifying current or recently used prescription and nonprescription drugs.

(b) Sample collection, storage, and transportation to the place of testing shall be performed in a manner reasonably designed to preclude the possibility of sample contamination, adulteration, or misidentification.

(c) Sample testing must comply with scientifically accepted analytical methods and procedures. Except for on-site testing under AS 23.10.645, drug testing shall be conducted at a laboratory approved or certified by the Substance Abuse and Mental Health Services Administration or the College of American Pathologists, American Association of Clinical Chemists.

(d) Drug testing, including on-site drug testing, must include confirmation of a positive drug test result. The confirmation must be by use of a different analytical process than was used in the initial drug screen. The second or confirmatory drug test shall be a gas chromatography mass spectrometry. An employer may not rely on a positive drug test unless the confirmatory drug test results have been reviewed by a licensed physician or doctor of osteopathy. The physician or osteopath shall

(1) contact the employee within 48 hours and offer an opportunity to discuss the confirming test result;

(2) interpret and evaluate the positive drug test results for legal use; and

(3) report test results that have been caused by prescription medication as negative.

(e) A drug test conducted under this section or in an on-site test under AS 23.10.645 for a drug for which the United States Department of Health and Human Services has established a cutoff level shall be considered to have yielded a positive result if the test establishes the presence of the drug at levels equal to or greater than that cutoff level. For a drug for which the United States Department of Health and Human Services has not established a cutoff level, the employer shall, in the written policy under AS 23.10.620, inform employees of the cutoff level that the employer will use to establish the presence of the drug.