Final answer:
The Installation RSO must survey each radioactive waste disposal storage site semiannually to ensure proper maintenance and security.
Step-by-step explanation:
Chemistry: Radioactive Waste Disposal
In order to ensure that radioactive waste disposal storage sites are being maintained properly and properly secured, the Installation RSO must survey each site semiannually.
Semiannual surveys are conducted twice a year and provide regular assessments of the condition and security of the storage sites. This frequency helps to ensure the safety and compliance of the sites with regulations regarding radioactive waste.