| Jan. 1992 | Obtained approval for the investment of joint venture with Stolt Tank Containners from the ministry of Finance and treasury. |
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| Sept.1992 | Hyop Woon Stolt Transportation Services Co., Ltd., was founded as a joint venture company between Stolt Tank Containers Ltd., and Hyop Woon Shipping Ltd. for tank container cleaning and repairing with the capital of Won 200 million. |
| Nov. 1992 | Imported cleaning machinery for the tank containers(weidner machine) and commenced business(352-2 Jaesong-dong). |
| Feb. 1999 | Made purchasing agreement for 1,206㎡ in Yang San to build cleaning station for Hyopwoon-Stolt Transportation Services Co.,Ltd., |
| Jan. 2000 | Completed Construction. |
| Feb. 2000 | Moved to Yangsan from Jaesong C.Y in Dong-Bu, Busan. |
| Mar. 2000 | Held openning ceremony and newly commenced it's operation. |
| May. 2005 | Purchased land 2,399m² in Kwanyang |
| Dec. 2008 | Purchased land 5.456m² in Ulsan |
| Nov. 2010 | Commenced Onsan Cleaning station's operation |
| Jan. 2014 | Moved to 12, Sanmakgongdanbuk 8-gil from 35, Sanmakgongdanbuk 8-gil in Yangsan |
| Apr. 2016 | Purchased additional land 7,125.90㎡ in Ulsan |