| 118 | Air emission facility installation report rental service | Taechang Bio Co., Ltd. | Taechang Bio Co., Ltd. | 2021. 01 |
| 211 | Atmosphere prevention facility installation work | Mido Co., Ltd. | Mido Co., Ltd. | 2022.10 |
| 180 | Air, noise and vibration approval | Baeksan Wood Co., Ltd. | Baeksan Wood Co., Ltd. | 2022.05 |
| 202 | Air and wastewater licensing service/magnetic pump installation | Dio Electronics Co., Ltd. | Dio Electronics Co., Ltd. | 202208 |
| 195 | Air and wastewater change report permit service | Dio Electronics Co., Ltd. | Dio Electronics Co., Ltd. | 2022.07 |
| 194 | In addition to reporting the start of operation of air and wastewater | Yusu Industry Co., Ltd. | Yusu Industry Co., Ltd. | 2022.07 |
| 121 | Chemical piping during dredging and cleaning of Daegu food processing facility | Techcross Environmental Service | Daegu city | 2021.02 |
| 100 | Daegu Sangri food waste treatment plant improvement project | Techcross Environmental Service Co., Ltd. | Daegu Sangni | 2020. 06 |
| 26 | Manufacturing and installation of multi-layer filter | Jeonbuk Innovation City Water Quality Restoration Center | Jeonbuk Innovation City Water Quality Restoration Center | 2015.10 |
| 278 | 다이아프램밸브 교체공사 | (유)상산개발 | Gunsan | 2025.03 |
| 25 | Diaphragm valve replacement | Korea Mold | Korea Mold | 2015.09 |
| 85 | Diaphragm valve | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2020. 02 |
| 101 | Diaphragm pump construction | Minseong Industry | Minseong Industry | 2020. 07 |
| 217 | Concentration tank, dewatering tank piping repair work | Techcross Environmental Services Co., Ltd. | Techcross Environmental Services Co., Ltd. | 2022.11 |
| 89 | Concentration tank silt basin fine dust remover repair contract | Techcross Environmental Service Co., Ltd. | Gunsan Sewage Treatment Plant | 2020. 03 |
| 234 | Concentrate chemical injection facility repair work | Techcross Environmental Service Co., Ltd. | Techcross Environmental Service Co., Ltd. | 2023.05 |
| 72 | Agricultural Life Center restaurant cooling and heating system installation work | National Youth Training Center | National Youth Training Center | 2019. 12 |
| 5 | Nexelon wastewater treatment facility installation work | Econity | Nexelon | 2013. 11 |
| 3 | Nexelon wastewater treatment facility installation work | Econity | Nexelon | 2013. 10 |
| 102 | Mechanical equipment construction | Deokyu Engineering Co., Ltd. | Deokyu Engineering Co., Ltd. | 2020. 07 |
| 161 | Geumam Village Sewage Treatment Plant Repair Work | Techcross Environmental Service Co., Ltd. | Geumam Village Sewage Treatment Plant | 2021.12 |
| 108 | Gunsan Port pollutant storage facility chemical sludge tank replacement work | Gunsan Regional Maritime Affairs and Fisheries Office | Gunsan Port | 2020. 08 |
| 275 | 군산하수종말처리장 최종침전조 비계설치 | 리뉴어스주식회사 | Gunsan | 2025.01 |
| 257 | 군산하수사업소 탈수동 지하 공정수펌프 도출배관 수선 | 리뉴어스주식회사 | 군산시 하수처리장 | 2024.06 |
| 263 | 군산하수사업소 농축조 슬러지 토출배관 보수 | 리뉴어스(주) | Gunsan | 2024.09 |
| 258 | 군산하수사업소 관리동 지하 저수조 교체 | 리뉴어스주식회사 | 군산시 하수처리장 | 2024.06 |
| 213 | Gunsan wastewater treatment plant separation membrane replacement and cleaning work | Gunsan City Waterworks Office | Gunsan Wastewater Treatment Plant | 2022.11 |
| 272 | 군산시 폐기물매립장 세차시설 유수분리조 설치공사 | Gunsan City Hall | Gunsan | 2024.12 |
| 107 | Gunsan Business Office Pond Room 2A Pond Discharge Drain Piping Construction | Korea Marine Environment Corporation Gunsan Branch | Korea Marine Environment Corporation | 2020. 08 |
| 67 | Replacement of fire extinguishing gas desulfurizer at Gunsan office | Techcross Environmental Service Co., Ltd. | Gunsan Sewage Treatment Plant | 2019.11 |
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