June 2021 Since the beginning of the 21st century, the rapid development and urbanization in China has resulted in tens or even hundreds of millions of tons of Construction and Demolition (C&D) Waste produced each year. The boom in urban real estate has led to a soaring C&D waste disposal issue. Since 2017, the Chinese … Continue reading
March 2021 During the COVID19 pandemic period, U.S. waste disposal companies have paid more attention to the medical waste disposal market, and seek opportunities to enter new markets outside the U.S. Therefore, U.S.-China Environmental Education Foundation (UCEEF) was invited by the U.S. Department of Commerce’s Commercial Service and the Global Environmental Technologies Team of the … Continue reading
February 2021 Medical waste disposal industry in China started in the 1980s. During the COVID-19 pandemic in 2020, authorities including the National Health Commission issued the Work Plan for Comprehensive Treatment of Waste from Medical institutions. The work plan requires each prefecture-level city (293 prefecture-level cities) to build at least one standardized medical waste disposal … Continue reading
February 2020 China is the country with the large amount of population and solid waste generated in the world. Each year, the total amount of solid waste generated in China is about 10 billion tons which includes nearly 4 billion tons of livestock and poultry waste comprising approximately, 1 billion tons of crop straws, 3.3 … Continue reading
The Interstate Technology & Regulatory Council (ITRC) Green and Sustainable Remediation (GSR) Team has developed the Green and Sustainable Remediation document to assist the remediation industry with the integration of green and sustainable practices into existing site investigation and remediation programs. This document provides an introduction to GSR, including definitions of key terms specific to … Continue reading
Volatile chemicals released from contaminated soil and groundwater can accumulate in soil gas and migrate through unsaturated soils of the vadose zone. This process is known as vapor intrusion (VI). Petroleum vapor intrusion (PVI) is a subset of VI and describes the process by which volatilized hydrocarbons from petroleum-contaminated soils, groundwater, and light nonaqueous phase liquids (LNAPL) diffuse through the vadose zone and into overlying buildings. … Continue reading
Abs: Active soil gas methods consist of the withdrawal and analysis of the soil gas from the subsurface. These methods give concentration data (for example, μg/m3) for COCs, which can be directly compared to risk-based screening levels or used in predictive models… Continue reading
Abs: The site investigation phase starts with implementing a concentration-based evaluation using existing data. If necessary, the next step involves conducting a PVI investigation. Data evaluation is followed to determines whether additional investigation is warranted. Finally, a conclusion on the completeness of the PVI pathway must be made… Continue reading
摘要：场地调查阶段首先需要借助现有的数据进行基于浓度的初步筛查，根据筛查结果进行石油蒸汽侵入调查。调查过程中采集的数据需要进一步评估，从而决定是否需要更细致的场地调查。最后得出关于石油蒸汽侵入途径的一个完整结论。… Continue reading
ABS：This chapter describes a method for PVI screening based on the vertical distance from a petroleum vapor source to a building foundation (vertical separation distance). Application of the method is expected to improve PVI screening and reduce unnecessary data collection at numerous petroleum release sites.
