조사 대상은 보령과 당진, 서천, 태안 등 4개 시·군 석탄화력 주변 5㎞ 이내 8개 초등학교 1·2학년 학생 125명이다.
The targets for the investigation are 125 1st- and 2nd-grade elementary school students from 8 elementary schools located within 5 km of coal-fired plants in the cities and counties of Boryeong, Dangjin, Seocheon and Taean.