APPROVAL is to be sought for a $10 million consultancy study to move to an outlying island a low-radioactive material storage site from Queen's Road East - a site deemed unsuitable in 1991 for storing such material. A submission to the Legislative Council's public works sub-committee cited the lack of expertise in the Environmental Protection Department to support the funding request. The need for a new site arose in 1991 following a study which said the tunnels in Queen's Road East were not suitable for storing low-level radioactive waste. This was because of ''their structural instability, inadequate drainage, unsealed floors and unlined interior'', according to the report. Most of the materials stored in the tunnel were industrial and medical waste. In February 1991, an appeal was made to the Government to provide a new facility. The Government said in its submission that it had shortlisted Shek Kwu Chau and Siu A Chau.