The results of survey of pollution at the base in 2009 showed that the carcinogenic substance beyond the tolerance limit was detected in four of 11 districts covering 160 000 phyong.

In order to conceal the fact, the then Ministry of Foreign Affairs and Trade, the Ministry of Defense and the Ministry of Environment tailored the survey results before announcing that just a small area was polluted in a bid to understate the environmental pollution by the U.S. forces. Moreover, the puppet authorities decided to cover expenses for de-polluting, yielding to the U.S. arbitrary practice.

The recent disclosure of the group's sycophancy toward the U.S. sparked uproar among broad spectrum of people in south Korea. They are becoming vocal demanding a thoroughgoing survey of the pollution at the U.S. military base in Ryongsan, Seoul to be transferred in 2016.