| 165 | Other than waiting permit rental service | Wooshin Pigment Co., Ltd. Iksan Branch | Wooshin Pigment Co., Ltd. Iksan Branch | 2022.01 |
| 164 | Scrava repair work | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.01 |
| 163 | Dust collector fan balancing work | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2022.01 |
| 162 | Nowun reservoir residential water outflow valve room repair work | Gunsan City Waterworks Office | Naun Bae Suzy | 2021. 12 |
| 161 | Geumam Village Sewage Treatment Plant Repair Work | Techcross Environmental Service Co., Ltd. | Geumam Village Sewage Treatment Plant | 2021.12 |
| 160 | Okgon Village Sewage Treatment Plant Repair Work | Techcross Environmental Service Co., Ltd. | Okgon Village Sewage Treatment Plant | 2021.12 |
| 159 | Donggunsan Industrial Complex public wastewater treatment facility improvement project | Shinyoung Tech Co., Ltd. | East gunsan Industrial Complex | 2021.12 |
| 158 | Repair of bioreactor alum input equipment | Techcross Environmental Service Co., Ltd. | Techcross Environmental Service 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 |
| 156 | Cullet sorting plant dust collector installation work (700CMM) | Korea Glass Industry Co., Ltd. | Korea Glass Industry 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 |
| 154 | Exempt facility measurement tool installation work | Dongwoo Farm to Table Co., Ltd. | Dongwoo Farm to Table Co., Ltd. | 2021.11 |
| 153 | Blower balancing & bearing and belt replacement | 3AC Co., Ltd. | 3AC Co., Ltd. | 2021.10 |
| 152 | Chemical tank installation work | Dio Electronics Co., Ltd. | Dio Electronics Co., Ltd. | 2021.09 |
| 151 | Air dryer installation work | Woosuk Engineering Co., Ltd. | Woosuk Engineering Co., Ltd. | 2021.09 |
| 150 | Wastewater treatment plant installation work (150 tons/day) | Daewoo Engineering & Construction | Iljuk Sewage Treatment Plant | 2021.09 |
| 149 | Environmental approval and permit rental services, etc. | Daeseung Industrial Co., Ltd. | Daeseung Industrial Co., Ltd. | 2021.08 |
| 148 | Wastewater treatment plant repair work | Dio Electronics Co., Ltd. | Dio Electronics Co., Ltd. | 2021.08 |
| 147 | Post-treatment duct chamber cleaning and duct installation work | Iljin Steel Co., Ltd. | Iljin Steel Co., Ltd. | 2021.08 |
| 146 | Digester B series concentrated sludge supply pipe replacement | Techcross Environmental Service Co., Ltd. | Techcross Environmental Service Co., Ltd. | 2021.08 |
| 145 | Pen Balancing and Bearing Replacement | Korea TV Co., Ltd. | Korea TV Co., Ltd. | 2021.07 |
| 144 | Expanded separation membrane pretreatment equipment screw canvas air reduction shaft repair and piping improvement repair | Environmental Facility Management Co., Ltd. | Environmental Facility Management Co., Ltd. | 2021.07 |
| 143 | Production and installation of local ventilation facilities for the grinding process | Sangwon IML Co., Ltd. | Sangwon IML Co., Ltd. | 2021.07 |
| 142 | Delivery and installation of filters, dehydrators, chemical pumps, etc. | Farmers Food Co., Ltd. | Farmers Food Co., Ltd. | 2021.07 |
| 141 | Glass shop wastewater treatment equipment | Seawell Optician | Seawell Optician | 2021.06 |
| 140 | Glass shop wastewater treatment equipment | Gwangyeoldang | Gwangyeoldang | 2021.06 |
| 139 | Wastewater discharge facility reporting rental service | Dongwoo Farm to Table Co., Ltd. | Dongwoo Farm to Table Co., Ltd. | 2021.06 |
| 138 | Digestion tank transfer pipe repair work | Gunsan Sewage Treatment Plant | Gunsan Sewage Treatment Plant | 2021.06 |
| 137 | Painting booth and adsorption tower installation work (400㎥/min) | Wooseok Engineering (Tata Daewoo primary vendor) | Wooseok Engineering | 2021.06 |
| 136 | Filtration dust collection facility installation work (400㎥/min) | Gunjang recycling cycle | Gunjang recycling cycle | 2021.05 |
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