Dec.2004 Soil pollution purification project of Busan rolling stock workshop
Jul.2002 Improvement facilities work of the common wastewater treatment plant of Jangrim Leather Cooperative, Sinpyeong-dong, Busan, Bio-Center installation work
Sep.2001 Installation work of livestock wastewater reuse pilot plant
May.2001 Construction of high filtration facilities of Deoksan filtration plant (granular activated carbon) at Deoksan, Korea
May.2000 Construction of high filtration facilities of Deoksan filtration plant (connection control reservoir) at Deoksan, Korea
Feb.2000 Architectural work of public waste treatment plant in Changwon, Korea