토양위해성평가를 위한 합리적 토양조사방안 연구

정승우,안윤주,Jeong, Seung-Woo,An, Youn-Joo 한국지하수토양환경학회 2007 지하수토양환경 Vol.12 No.1

토양위해성평가를 위한 토양조사방법의 목적은 오염정도와 범위를 파악하여 부지의 대표적인 토양노출농도를 결정해야 하는 것은 물론이고 부지의 물리화학적 특성을 조사하여 노출평가시 사용될 수 있는 주요 정보를 제공하는데 있다. 앞으로 우리나라도 토양위해성평가를 위한 토양조사시 두 가지 점을 고려해야 할 것으로 나타났다. 첫째, 현재 우리나라의 토양조사는 오염정도와 범위 확인을 위한 조사에 국한하고 있으므로 차후 위해성평가를 위해서는 부지의 물리화학적 특성파악을 위한 조사가 추가되어야 한다. 둘째, 국내와 외국의 토양조사방법에 있어 가장 큰 차이는 외국의 현장조사계획에서는 모든 데이터에 대해 통계학적 개념을 반영하여 시료채취 개수 결정 및 오염여부 판단에 신뢰성을 확보하고 있다는 점으로 우리도 이에 대한 보완이 필요할 것으로 판단된다. 본 연구에서는 토양위해성평가를 위한 토양조사방법을 별도로 마련하는 것보다 기존 토양정밀조사지침과 연계하여 토양위해성평가의 목적을 이룰 수 있는 토양조사방안을 제안하였다. The objectives of soil investigation in risk assessment of contaminated sites are to characterize the level and area of contamination, and provide the important physical and chemical properties of contaminated sites for later exposure assessment. This study suggests two soil investigation strategies to be considered in the soil risk assessment in Korea. First, soil investigation for characterizing soil properties is additionally required to the current investigation method that has focused on chemical analysis. Second, application of statistical concepts to soil investigation plan and soil data analysis are required for confidential decison-making on contamination and determining the exposure soil concentration. This study provides a practical soil investigation strategy to involve the current Korean soil analysis guidance with the minimum sample number required for satisfying statistical limits.

선진국 토양오염 기준의 역할과 기준항목 설정방법

정승우,안윤주,김태승,Jeong, Seung-Woo,An, Youn-Joo,Kim, Tae-Seung 한국지하수토양환경학회 2009 지하수토양환경 Vol.14 No.1

Many countries have recently established legal regulations and soil quality standards for soil protection, This study investigated the role of soil quality standards in soil protection policy and methods of selecting standard substances from various types of chemicals. In most countries, soil quality standards act as guidance for further detail surveyor risk assessment from comparing soil concentration with the soil quality standards. Soil quality standards of Switzerland, Demark and Japan were used as enforcement tools. Priority substances for the standards were first selected from frequently detected chemicals in contaminated sites. Those substances were extensively evaluated for toxic effects, exposure potential and availability in chemical analysis. 세계 각국은 토양환경의 효율적인 관리를 위하여 각국의 상황에 적합한 토양오염기준을 운영하고 있다. 본 총설은 각국의 토양환경관리 정책에서 토양오염기준의 역할과 토양오염기준 항목을 설정하는 방법에 대해 체계적으로 분석하여 시사점을 도출하고자 하였다. 대부분의 토양기준은 토양오염여부를 일차적으로 판단하기 위한 Guideling 역할을 수행하고 있었으며, 기준치가 오염여부 판단과 관련 행정명령의 지표인 Standard로 활용하고 있는 나라는 스위스, 덴마크, 일본 등이었다. 네덜란드는 Guideline과 Standard를 혼용하고 있었다. 토양오염기준 물질선정은 현장에서 검출빈도수가 높은 토양오염물질을 중심으로 이루어졌으며 독성, 노출, 분석의 용이성, 독성자료의 가용성 등 다양한 인자를 복합적으로 고려하여 선정되었다. 각 나라는 자국의 토양환경정책 및 기준 설정에 있어 자국의 상황을 고려한 특징을 가지고 있었다.

미국 환경법의 Imminent & Substantial Endangerment에 대한 이해 및 사례별 분석

정승우,Jeong, Seung-Woo 한국지하수토양환경학회 2009 지하수토양환경 Vol.14 No.3

미국 환경법에 규정된 Imminent & Substantial Endangerment(ISE) 조항에 대한 정의, 결정 및 적용사례를 분석하였다. ISE는 행정권자가 현재의 환경오염상황이 인체에 급박하고 실질적인 위해를 가할 수 있는 오염으로 판단할 경우 오염책임자에게 대책을 강구하게 하는 환경오염 상황 및 환경법상의 조항으로 정의된다. 이때의 행정권자의 대책 요구는 권고, 행정명령, 민사소송, 형사소송 등 다양하게 이루어지며 모든 행정 집행 과정에 ISE가 언급된다. ISE의 판단을 위해서는 1) a possible ISE 2) because of actual or threatened release 3) of a hazardous substance 4) from a facility, 네 가지 요소에 대한 명확한 증거가 있어야 한다. 그러나 네 가지 요소에 대한 정의는 매우 광범위하며 유연성을 가지고 있어, ISE 판단은 행정권자의 충분한 자료 확보와 주관적인 판단에 따르는 것으로 나타났다. 또한 ISE 판단은 판단 주체에 따라 차이를 보이지만 공통적인 사항은 매우 상세한 현장조사 결과 및 과학적인 정황에 기인하고 있다. 미국내 ISE 행정명령에 대한 기본 문서 형태 및 내용은 규정되어 있지만 ISE 판단에 대한 구체적인 정량적 기준 및 방법은 정의되어 있지 않았다. This study discusses the definition, determination and use of Imminent & Substantial Endangerment (ISE) included in the United States environmental laws. ISE is a contamination situation and statutory authority that state and federal governments issue an administrative order to responsible parties for clean-up. ISE is appeared in all kinds of official government documents such as administrative oders on consent, judicial consent degrees, and unilateral administrative order. In order to invoke ISE authority, the governments should have evidence of each of the following elements; 1) a possible ISE 2) because of actual or threatened release 3) of a hazardous substance 4) from a facility. The determination of ISE relies on detail scientific evidence and documentation in order to demonstrate the existence of conditions that may present an ISE. However, any official protocol or procedure has not been found for determining an ISE, although an ISE order documentation format is suggested by U.S. EPA.

토양측정망 운영 결과 분석 연구

정승우,Jeong, Seung-Woo 한국지하수토양환경학회 2010 지하수토양환경 Vol.15 No.2

Usability of soil quality monitoring network for ascertaining soil quality changes was evaluated by analysing soil quality monitoring results. Tolerance limits of soil quality monitoring results from 1997 to 2007 were calculated and compared with Korean soil quality standards. This study determined that soil quality was changed if the upper 95% tolerance limit value was greater than the soil quality standard. Fluoride most frequently exceeded the soil quality standard and nickel, zinc, arsenic, copper, lead and cadmium were followed. Analysis on land use showed that tolerance limits of industrial land use most frequently exceeded the soil quality standards and residential, road and various land uses then frequently exceeded. Tolerance limits of land uses expecting high contaminant loads frequently exceeded the soil quality standards. This fact imply that the soil quality monitoring network generates reasonable data to represent change in Korean soil quality. This study also suggested that representative sampling from well identified points should be done to improve data reliability and accurately ascertain soil quality changes.

토양측정망 운영목적에 따른 토양측정망 지점 선정 방안 연구

정승우,Jeong, Seung-Woo 한국지하수토양환경학회 2013 지하수토양환경 Vol.18 No.2

This study developed the classification of National Soil Quality Monitoring Network (NSQM) and its site selection criteria to meet the recently established purposes of the NSQM. The NSQM were suggested by this study to classify into the six-purposes site groups from the current classification of land uses. The six purposes site groups were 1) intensive observation sites, 2) contaminant loading sites, 3) human activity sites, 4) background sites, 5) river soil sites, and 6) sites near the groundwater quality monitoring wells. Furthermore, this study developed the site selection criteria of NSQM utilizing the accumulated NSQM data, road traffic data, chemical emission data, census, soil information, and the literature related to soil quality variation due to contaminant loads. For selecting suitable sites for NSQM, this study used road traffic, chemical emission, the distance from the contaminant sources, and population information as specific criteria. The suggested site classification and criteria were appled for the current 100 NSQM sites for evaluation. Forty sites were met to the criteria suggested by this study, but sixty sites were not met to the criteria. However, some of the sixty sites also included the obscure sites that their addresses were not apparent to find them.

토양.지하수오염원 관리우선순위 개략평가기법 개발

정승우,김영주,김재훈,황상일,Jeong, Seung-Woo,Kim, Young-Ju,Kim, Jae-Hoon,Hwang, Sang-Il 한국지하수토양환경학회 2011 지하수토양환경 Vol.16 No.6

This study developed preliminary assessment methodology for priority listing of soil and groundwater contamination sources, considering source characteristics, local environments and risk receptors. Source characteristics were evaluated by scoring relative risk of contamination sources. Local environments were evaluated by scoring annual rainfall, hydraulic conductivity of aquifer, and annual groundwater use. Risk receptors were evaluated by scoring local population, direct distance to surface water, direct distance to drinking-water wells. Scores of each parameter were allocated by analysing distribution of parameter values obtained from government databases. Distributed scores of source characteristics local environments: risk receptors were 12 : 12 : 12. The preliminary assessment scored 0 to 36 for each soil and groundwater sources. Inventory of soil and groundwater sources consisted of 7 categories. This study applied the preliminary assessment methodology to Manan-Gu, Anyang City, Korea. The number of car repair and washing facility was the largest in the contamination source inventory. Petroleum storage facilities showed the highest assessment score. The preliminary assessment methodology also indicated that Anyang-Dong was the priority section among Anyang-Dong, Suksu-Dong, Bakdal-Dong. This study is the first trial for relative ranking soil and groundwater contamination sources by considering source and local characteristics. Therefore, further researches and revision of the preliminary assessment methodology need to be pursued for various applications.

이동통신 중계기용 아이솔레이터의 설계 및 제작

정승우,정윤환,박노준,강영진,최우성,Jung, Seung-Woo,Jeong, Yun-Hwan,Park, Noh-Joon,Kang, Young-Jin,Choi, U-Sung 한국정보통신학회 2007 한국정보통신학회논문지 Vol.11 No.9

본 논문에서는 온도보상 자기회로를 갖는 집중정수형 아이솔레이터를 설계하고 전자계 시뮬레이션을 통한 최적 파라미터를 이용하여 각각 K-PCS, GSM1900, W-CDMA, WiBro 대역의 이동통신 중계기용 아이솔레이터를 제작하였으며 IMD 특성을 평가하였다. 결과로서 K-PCS 대역의 경우에 Insertion loss와 Return loss는 각각 0.2dB 이하, 25dB이상, Isolation 23dB에서 대역폭은 30MHz이었고 GSM1900의 경우에는 각각 0.25dB, 23dB, Isolation 30 dB에서 대역폭은 60 MHz이었으며 W-CDMA의 경우에는 각각 0.15dB, 25dB, Isolation 24.8 dB테서 대역폭은 60 MHz이었다. 또한 WiBro 대역의 경우에는 각각 0.25dB, 23dB 이상, Isolation 22.1dB에서 대역폭은 100MHz이었고 IMD측정 결과는 $76.4dBc{\sim}80.1dBc$이었으며 기존의 제품에 비하여 우수한 특성을 가지고 있음을 확인하였다. The lumped element isolators with temperature compensation magnetic circuits were designed in this paper. Isolators for mobile repeater at each band of K-PCS, GSM1900, W-CDMA, WiBro were fabricated by using optimum parameters of EM simulation, Form the results of this study, first of all, insertion loss at K-PCS band was below 0.2 dB and return loss was over 25dB. The bandwidth in isolation 23dB was found 30 MHz. Secondly, the figures of both losses at GSM1900 were 0.25dB and 23dB, respectively. The measured bandwidth in isolation 30dB was 60MHz. Thirdly, the losses at W-CDMA band were 0.15dB and 25dB. The bandwidth in isolation 24.8dB was found 60Mhz. Finally, the figures of both losses at Wibro band were 0.25dB and 23dB, respectively. The measured bandwidth in isolation 22.1dB was 100Mhz. In addition, the results of measured IMD were shown from 76.4dBc to 80.1dBc.

초등 예비교사들의 공간적 사고를 고려한 천문 분야 교수·학습 자료 개발 양상

김종욱 한국초등과학교육학회 2022 한국초등과학교육학회 학술대회 Vol.81 No.-

Green BIM기반 초기설계 단계에서 타입별 아트리움의 규모산정에 관한 연구

정승우(Seung-Woo Jeong),이권형(Kweon-Hyoung Lee),김인한(In-Han Kim),추승연(Seung-Yeon Choo) (사)한국CDE학회 2013 한국CDE학회 논문집 Vol.18 No.1

This study for establishing specific standards of atrium design aims to discuss design of atrium to consider energy performance atrium in office buildings. In order to evaluate a type and a scale of atrium at the early design stage, modeling details of mass design were set as standards of conceptual design. In the experiment, Project Vasari was used to analyze modeling and energy consumption, based on the LOD 100-step suggested by AIA, because there is no guideline to specify a level of modeling details at each design process. From this analysis, the correlation among a simple- typed atrium and scale and energy load was considered. The result of this research is as follows: First, the single-sided atrium reduced energy the most, and it was followed by three-sided, two-sided, four-sided and continuous-typed ones. On the whole, they could decrease energy by up to about 15%. Also, the atrium with a wide facade facing in the south was more favorable to reduce energy. Second, planning the atrium within 10~30% of the whole building area was more energy efficient. Third, rather than the depth, adjusting the length in designing an atrium could reduce cooling and heating loads by 1.5% per 1m. As explained above, energy performance evaluation considering types and planning elements of atrium helps to assess alternatives in a reasonable way. In particular, considering the use of building needs to be preceded to select a type of atrium, although it is also important to consider its planning elements.

환경영향평가 토양환경분야 현황분석과 합리적인 평가방안 연구

정승우(Seung Woo Jeong) 大韓環境工學會 2004 대한환경공학회지 Vol.26 No.7