| 137 | Painting booth and adsorption tower installation work (400㎥/min) | Wooseok Engineering (Tata Daewoo primary vendor) | Wooseok Engineering | 2021.06 |
| 265 | 동군산산업단지 공공폐수시설 탈수설비 유량계 신설 공사 | Gunsan City Hall | Gunsan | 2024.10 |
| 159 | Donggunsan Industrial Complex public wastewater treatment facility improvement project | Shinyoung Tech Co., Ltd. | East gunsan Industrial Complex | 2021.12 |
| 245 | East gunsan Industrial Complex public wastewater treatment facility reaction tank internal return pump installation work | Gunsan City Hall | East gunsan Industrial Complex | 2024.02 |
| 38 | Drum screen installation work | HiNTech Co., Ltd. | Hyocheon Sewage Treatment Plant | 2018.07 |
| 23 | Village sewage treatment facility expansion construction | Econity | Yeongdong-gun | 2015. 09 |
| 21 | Micro filter piping repair work | Securit Co., Ltd. Gunsan | Securit Co., Ltd. | 2015. 07 |
| 62 | Micro filter housing installation work | Baekje Country Club Co., Ltd. | Baekje Country Club | 2019.09 |
| 260 | 매일유업 아산공장 대기배출시설 설치신고 대관용역 | ㈜신영이엔지 | 충남 아산 | 2024.07 |
| 154 | Exempt facility measurement tool installation work | Dongwoo Farm to Table Co., Ltd. | Dongwoo Farm to Table Co., Ltd. | 2021.11 |
| 113 | Fine dust filtration BOOTH production and installation | KoreaTBM | KoreaTBM | 2020.10 |
| 87 | Plumbing construction | Segi E.N.G. | Korea Securit | 2020. 03 |
| 90 | Plumbing work, pump installation | Segi E.N.G. | SeAH Besteel | 2020. 03 |
| 93 | Piping installation work | Segi E.N.G. | SeAH Besteel | 2020. 04 |
| 4 | Exhaust facility installation work | Security Gunsan Co., Ltd. | Security Co., Ltd. | 2013. 11 |
| 109 | Production and delivery of discharge device frame to Munyeodo Small Sewage Treatment Plant | Sangwon E&C Co., Ltd. | Shaman Island | 2020. 08 |
| 256 | White filter replacement work | 주식회사 한국몰드김제 | 주식회사 한국몰드김제 | 2024.06 |
| 241 | White filter replacement work | Korea Mold Gimje Co., Ltd. | Korea Mold Gimje Co., Ltd. | 2023.12 |
| 226 | White filter and diaphragm valve replacement work | Dabok Metal Co., Ltd. | Dabok Metal Co., Ltd. | 2023.02 |
| 27 | Bag filter and short equipment repair work | Korea TV | Korea TV | 2015.12 |
| 54 | Bag filter installation work | Lucky Environment Co., Ltd. | Lucky Wood | 2019.04 |
| 52 | Bag filter installation work | Lucky Wood Co., Ltd. | Lucky Wood | 2019.02 |
| 250 | 백필터 설치공사 (200CMM*2SET) | LX 글라스 | LX 글라스 | 2024.04 |
| 227 | White filter installation work (1200㎥/min*2set, 650㎥/min*4set) | Korea Glass Industry Co., Ltd. | Korea Glass Industry Co., Ltd. | 2023.03 |
| 193 | bag filter dust collector | Jeongdo Industry | Jeongdo Industry | 2022.06 |
| 214 | Borax dust collector duct repair and cleaning work | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.11 |
| 279 | 부안사업소 부안공공하수처리시설 슬러지 이송.처리용 신규배관 설치 | 리뉴어스주식회사 | 부안 | 2025.03 |
| 268 | 부안하수슬러지처리시설 악취개선사업 | 부안군청 | 부안 | 2024.11 |
| 190 | Sewage treatment plant odor reduction facility repair work | Gunsan City Waterworks Office | Gunsan City Waterworks Office | 2022.06 |
| 143 | Production and installation of local ventilation facilities for the grinding process | Sangwon IML Co., Ltd. | Sangwon IML Co., Ltd. | 2021.07 |
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