Daehyun Environment

Environmental Quality Measurement, Analysis: To minimize the environmental impact that may occur during large-scale development projects, we provide reliable results based on skilled technical personnel and state-of-the-art analytical equipment, offering precise measurement and analysis services. In addition to environmental quality measurement, we also provide various services such as waste component analysis throughout the process of environmental impact assessment and post-environmental impact assessment.

Environmental Quality Measurement and Analysis in Five Areas

Air : Parameters for emission gases and ambient air quality according to air pollution test standards

Marine (Marine Water, Seabed Sediments) : Parameters for marine water quality, seabed sediments, marine organisms, and marine waste according to marine environmental test standards

Water Quality (Surface Water, Groundwater, River Sediments) : Parameters including general items, ions, metals, organic substances, volatile organic compounds, and biological sedimentation according to water pollution test standards

Noise and Vibration : Various noise and vibration measurements for daily life, construction, transportation, railways, and aircraft

Odor : Parameters for complex odors and designated odors according to odor test standards

Items of Management Agency Services

Air Measurement Agency (Anyang City/No. 3/1998), Water Quality Measurement Agency (Anyang City/No. 4/1998)

Noise and Vibration Measurement Agency (Anyang City/No. 6/1998), Odor Measurement Agency (Anyang City/No. 3/2005)

Accredited Waste Analysis Institution (National Institute of Environmental Research/No. 10/General, Organic Substances, No. 43/PCBs)

Accreditation for Marine Environmental Measurement and Analysis Capability (Ministry of Oceans and Fisheries/No. 46, No. 55/General Water Quality, Trace Sediments)

Documents Required for Service Utilization

Request for Quotation and Test Request (Company Form)

Copy of Business Registration Certificate of the Client

Attached Survey Location Map and Task Instructions

Other Documents that may be relevant for Environmental Quality Survey and Analysis

Detailed Items of Measurement Agency Services

Evaluation Categories	Measurement Items		Measurement Methods	Measurement standards
Atmospheric Environment Sector	Atmospheric Quality		Air quality standard items including PM-10, PM-2.5, NO₂, SO₂, CO, O₃, Pb, Benzene, etc. Various health impact assessment items such as heavy metals and VOCs in the atmosphere.	Air Pollution Process Test Standards
Atmospheric Environment Sector	Odor		Complex odor Various designated odorants items including ammonia, methyl mercaptan, hydrogen sulfide, toluene, xylene, styrene, etc.	Odor Process Test Standards
Water Quality Environment Sector	Surface Water Quality	Surface Water Quality	pH, BOD, COD, SS, DO, fecal coliforms, T-N, T-P, benzene, ecotoxicity, organic solvents, underwater heavy metals, etc. Water quality evaluation items	Water Quality Pollution Process Test Standards
	Surface Water Quality	River Sediment	Standard items for river and reservoir sediment, including flow rate, COD, TOC, T-N, T-P, heavy metals in sediment, etc.	Water Quality Pollution Process Test Standards - Sediment Part
	Groundwater Quality		Standard items for groundwater quality including, general pollutants, specific hazardous substances, etc. Standard items for drinking water quality assessment including, microorganisms, harmful inorganic substances, harmful organic substances, disinfectants and disinfection by-products, aesthetic contaminants, radioactive substances, etc.	Water Quality Pollution Process Test Standards and KS Standard Test Methods
	Marine Water Quality	Marine Water	Items for marine habitat environmental quality and water quality assessment indices including pH, solvent extractable fractions Protection items for marine ecosystems such as heavy metals. Health protection items such as heavy metals and organic solvents.	Marine Environment Process Test Standards - Seawater Part
	Marine Water Quality	Submarine Sediment	Items related to cautionary and management standards for seabed sediments.	- Items for sediments
Living Environment Sector	Noise and Vibration		Various sources of noise and vibration such as daily life, construction, transportation, railways, and aircraft.	Noise and Vibration Process Test Standards

Major trading companies

Geon Il Co., Ltd, Geon Hwa Co., Ltd, Gyeong Dong ENG, Co., Ltd, Geuk Dong ENG Co., Ltd, Dohwa ENG Co., Ltd, (주)동성ENG, Seo Young ENG Co., Ltd, Dong-A Engineering & Construction Co., Ltd, Sin Seong ENG Co., Ltd, Cheon Il Co., Ltd,, Isan Co., Ltd, (주)이산, Pyeonghwa ENG Co., Ltd, Hanmaek Tech Co., Ltd, Yoosin Co., Ltd, KECC Co., Ltd, and many others.

Business performance

Environmental Impact Assessment : National Industrial Complex Energy Supply Facilities and many others.

Strategic Environmental Impact Assessment : Strategic Environmental Impact Assessment for Road Construction Projects and many others.

Small-scale Environmental Impact Assessment : Small-scale Environmental Impact Assessment for Dam Capacity Enhancement Projects and many others.

Post-Environmental Impact Assessment : Post-Environmental Impact Assessment for Highway Expansion Projects and many others.

Marine Area Utilization Consultation : Marine Area Utilization Consultation for Harbor Access Channel Dredging Projects and many others.

Small Stream Improvement Project : Comprehensive Planning for Local Small Stream Improvement and many others.

Environmental Impact Assessment Target Projects / Post-Environmental Impact Assessment Periods

Target Projects	Survey Period
Urban development projects	Commencement of the project to 3 years after completion (However, for transportation facilities, it's until 5 years after completion, and for distribution facilities, parking facilities, markets, and schools, it's until completion)
Plans for the establishment of industrial complexes and industrial estates	From the commencement of the project to the year after achieving 70% occupancy after completion, and for the following 3 years (However, if 70% occupancy is not achieved within 7 years after completion, only in the 7th year)
Energy development projects	From the commencement of the project to completion of mining, and for 3 years after completion (However, power plants are for 5 years after completion, and overhead transmission lines and outdoor substations are until completion)
Construction projects for harbors	From the commencement of the project to completion of dredging, and for 5 years after completion (However, redevelopment of ports is for 3 years after completion, and other classified port facilities are until completion)
Construction projects for roads	From the commencement of the project to 3 years after completion
Development projects for water resources	From the commencement of the project to 5 years after completion
Construction projects for railways	From the commencement of the project to 3 years after completion
Construction projects for airports	For airport construction, from commencement of the project to 5 years after completion. Runways and airport development projects are until completion.
Utilization and development projects for rivers	From the commencement of the project to 3 years after completion
Reclamation projects for marshlands and shared water surfaces	From the commencement of the project to 5 years after completion
Development projects for tourist resorts	From the commencement of the project to completion (However, tourism projects are for 3 years after completion, and development of tourist sites and tourist complexes, as well as hot spring development projects, are until 5 years after completion)
Development projects for mountainous areas	From the commencement of the project to completion
Development projects for specific regions	Adherence to the post-environmental impact assessment period for general areas (However, for projects such as the construction of the new airport in the metropolitan area, comprehensive regional development projects, U.S. military facility projects, international planned zone development projects, Pyeongtaek city development projects, administrative center complex city construction projects, economic free zone development projects, enterprise city development projects, and waterfront development projects, the post-construction period is 3 years)
Plans and projects for the installation of sports facilities	From the commencement of the project to 3 years after completion (However, for projects such as the establishment of bicycle racing and horse racing facilities, youth training facility installation projects, and youth training zone construction projects, the post-construction period is until completion of construction.)
Installation projects for waste disposal facilities	From the commencement of the project to 5 years after completion (However, for sewage treatment facilities, final treatment facilities with an area of 50,000 square meters or more or a volume of 250,000 cubic meters or more, the post-construction period is until completion of construction)
Installation projects for national defense and military facilities	From the commencement of the project to completion (However, for newly established airports, the post-construction period is up to 5 years after completion of construction)
Extraction projects for soil, sand, gravel, minerals, etc.	From the commencement of the project to 3 years after completion (However, for designated gravel extraction sites, the designation period is until the completion of extraction)
Installation projects for facilities designated by presidential decree as having an impact on the environment	Adherence to the post-impact assessment period for both general and specific areas.