EPA Vial, zvakare inozivikanwa seyakagaridzira kuchengetedza Agency vial, rudzi rwemuenzaniso vial yakagadzirirwa kuongororwa kwezvakatipoteredza, kunyanya mumamiriro emvura uye kuongororwa kwevhu. Iyo EPA yakagadza mamwe manyatari uye mirau yekuedzwa kwezvakatipoteredza, uye EPA vials vakagadzirirwa kuzadzisa izvi zvinodiwa.
EPA vials vanowanzogadzirwa nezvinhu zvisina mwero, senge bolosilrate girazi, kuderedza kuwirirana pakati pemuenzaniso uye vial. Ivo vanowanikwa mune dzakasiyana saizi, kazhinji rinobva pamakore makumi maviri nemana kusvika 40 ml, kuti vagare vakasiyana siyana mumienzaniso.