MEMORANDUM AND JUDGMENT
Petitioner was found guilty of violating the prison disciplinary rule prohibiting the unauthorized use of controlled substances after two urinalysis tests produced positive results for the presence of cannabinoids. Substantial evidence of petitioner's guilt was presented at his disciplinary hearing in the form of the misbehavior report, the positive urinalysis test results with their accompanying documentation and the testimony of a correction officer, certified as a master trainer in the use of SYVA ETS urinalysis equipment (see Matter of Schnittker v. Selsky, 288 A.D.2d 794; Matter of Morales v. Selsky, 281 A.D.2d 658, lv denied 96 N.Y.2d 713). The officer refuted petitioner's contention that the second urinalysis test results were invalid because his urine sample had been frozen for 10 days prior to testing.
We reject petitioner's contention that his due process rights were violated because the correction officers who conducted the urinalysis testing did not testify at his hearing. By failing to request the appearance of these officers as witnesses, petitioner waived his right to present their testimony (see Matter of Harris v. Goord, 273 A.D.2d 599, 600, lv dismissed 95 N.Y.2d 917). The remaining issues raised herein have been reviewed and found to be without merit.
Cardona, P.J., Mercure, Crew III, Peters and Spain, JJ., concur.
ADJUDGED that the determination is confirmed, without costs, and petition dismissed.