| 151 | Air dryer installation work | Woosuk Engineering Co., Ltd. | Woosuk Engineering Co., Ltd. | 2021.09 |
| 152 | Chemical tank installation work | Dio Electronics Co., Ltd. | Dio Electronics Co., Ltd. | 2021.09 |
| 153 | Blower balancing & bearing and belt replacement | 3AC Co., Ltd. | 3AC Co., Ltd. | 2021.10 |
| 154 | Exempt facility measurement tool installation work | Dongwoo Farm to Table Co., Ltd. | Dongwoo Farm to Table Co., Ltd. | 2021.11 |
| 155 | Cullet sorting plant dust collector installation work (1800CMM) | Korea Glass Industry Co., Ltd. | Korea Glass Industry Co., Ltd. | 2021.11 |
| 156 | Cullet sorting plant dust collector installation work (700CMM) | Korea Glass Industry Co., Ltd. | Korea Glass Industry Co., Ltd. | 2021.11 |
| 157 | Steel pipe cleaning line dust collector relocation/installation of post-treatment duct inspection port Delivery of mobile fume dust collector | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2021.11 |
| 158 | Repair of bioreactor alum input equipment | Techcross Environmental Service Co., Ltd. | Techcross Environmental Service Co., Ltd. | 2021.11 |
| 159 | Donggunsan Industrial Complex public wastewater treatment facility improvement project | Shinyoung Tech Co., Ltd. | East gunsan Industrial Complex | 2021.12 |
| 160 | Okgon Village Sewage Treatment Plant Repair Work | Techcross Environmental Service Co., Ltd. | Okgon Village Sewage Treatment Plant | 2021.12 |
| 161 | Geumam Village Sewage Treatment Plant Repair Work | Techcross Environmental Service Co., Ltd. | Geumam Village Sewage Treatment Plant | 2021.12 |
| 162 | Nowun reservoir residential water outflow valve room repair work | Gunsan City Waterworks Office | Naun Bae Suzy | 2021. 12 |
| 163 | Dust collector fan balancing work | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.01 |
| 164 | Scrava repair work | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.01 |
| 165 | Other than waiting permit rental service | Wooshin Pigment Co., Ltd. Iksan Branch | Wooshin Pigment Co., Ltd. Iksan Branch | 2022.01 |
| 166 | Waiting permit rental service (Plant 1, Factory 2) | K-Net Co., Ltd. | K-Net Co., Ltd. | 2022.01 |
| 167 | Centrifugal force dust collector installation work | Sunil Agricultural Corporation Co., Ltd. | Sunil Agricultural Corporation Co., Ltd. | 2022.02 |
| 168 | Public wastewater treatment plant pressurized flotation filter media replacement work | Changjin Co., Ltd. | public wastewater treatment plant | 2022.02 |
| 169 | Other than waiting permit services | Dasan Wood | Dasan Wood | 2022.02 |
| 170 | Other than waiting permit services | Namyang Wood Co., Ltd. | Namyang Wood Co., Ltd. | 2022.02 |
| 171 | Waiting permit service | SA Tech Co., Ltd. | SA Tech Co., Ltd. | 2022.02 |
| 172 | Duct installation work | 3AC Jeongeup Factory | 3AC Jeongeup Factory | 2022.03 |
| 173 | Gyeongsan Industrial Complex Environmental Management Center Integrated Environmental Permit | Gyeongsan City Hall | Gyeongsan Industrial Complex | 2022.04 |
| 174 | Car wash wastewater discharge facility repair work | Seocheon Fire Station | Seocheon Fire Station | 2022.04 |
| 175 | Post-treatment dust collector filter replacement | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.04 |
| 176 | Post-processing dust collector damper replacement balancing | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.04 |
| 177 | Post-processing dust collector impeller replacement | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.04 |
| 178 | Mpm dust collector demister polling replacement | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.04 |
| 179 | Filtered water supply pump joint work | Techcross Environmental Service Co., Ltd. | Techcross Environmental Service Co., Ltd. | 2022.04 |
| 180 | Air, noise and vibration approval | Baeksan Wood Co., Ltd. | Baeksan Wood Co., Ltd. | 2022.05 |
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