This memorandum documents the updates implemented in EPA’s 2020 Inventory of U.S. Greenhouse Gas Emissions and Sinks (GHGI) for gathering and boosting (G&B) stations. Additional considerations for G&B were previously discussed in memoranda released November 2019 (Inventory of U.S. Greenhouse Gas Emissions and Sinks 1990-2018: Updates Under Consideration for Natural Gas Gathering & Boosting Station Emissions),1 October 2018 (Inventory of U.S. GHG Emissions and Sinks 1990-2017: Updates Under Consideration for Natural Gas Gathering & Boosting Emissions),2 and April 2019 (Inventory of U.S. GHG Emissions and Sinks 1990-2017: Updates to Natural Gas Gathering & Boosting Pipeline Emissions).3

Inventory of U.S. Greenhouse Gas Emissions and Sinks

A review on fly ash characteristics – Towards promoting high volume utilization in developing sustainable concrete

Construction and demolition waste constitutes a large fraction of all the waste generated in Europe. Its specific impact can be considered rather low, but the large generated volume and embodied resource makes this waste stream an important focus of current European policies. The European Commission has proposed new targets and goals for this waste stream in the Circular Economy package, but, given the rather heterogeneous landscape of waste management practice across Member States, new approaches that take into account the entire value chain of the construction sector are urgently required. This paper synthesises core principles and linked best practices for the management of construction and demolition waste across the entire construction value chain. Systematic implementation of these best practices could dramatically improve resource efficiency and reduce environmental impact by: reducing waste generation, minimising transport impacts, maximising re-use and recycling by improving the quality of secondary materials and optimising the environmental performance of treatment methods.

/pdf/construction-and-demolition-waste-best-management-practice-1djobrvkzv.pdf

Construction and demolition waste best management practice in Europe

https://pubs.rsc.org/en/content/articlepdf/2020/gc/d0gc01647k

Review of recent advances in the biodegradability of polyhydroxyalkanoate (PHA) bioplastics and their composites

The fundamentals of pyrolysis, its latest developments, the different conditions of the process and its residues are of great importance in evaluating the applicability of the pyrolysis process within the waste management sector and in waste treatment. In particular the types of residue and their further use or treatment is of extreme interest as they could become the source of secondary raw materials or be used for energy generation in waste treatments. The main area of focus of this paper is the investigation of the link between the pyrolysis conditions, the chemical and mineralogical composition of their products and the benefits of pyrolysis in the waste management sector. More specifically the paper covers the fast, intermediate and slow pyrolysis of organic waste and mixtures of inorganic and organic waste from households. The influence of catalysts during fast pyrolysis on the product yield and composition is not being considered in this review.

/pdf/potential-of-pyrolysis-processes-in-the-waste-management-1zbz34utvp.pdf

Potential of pyrolysis processes in the waste management sector

Describes procedures written based on the assumption that they will be performed by analysts who are formally trained in at least the basic principles of chemical analysis and in the use of the subject technology.

Validated Test Method 1314: Liquid-Solid Partitioning as a Function of Liquid-Solid Ratio for Constituents in Solid Materials Using An Up-Flow Percolation Column Procedure

method that covers the use of SPE discs, solvent extractions, and micro-liquid chromatography coupled with ES-ITMS

Validated Test Method 8323: Determination of Organotins by Micro-Liquid Chromatography-Electrospray Ion Trap Mass Spectrometry

This method describes a closed-system purge-and-trap process for the analysis of volatile organic compounds (VOCs) in solid materials (e.g., soils, sediments, and solid waste).

Validated Test Method 5035A: Closed-System Purge-and-Trap And Extraction For Volatile Organics In Soil And Waste Samples

These documents contain information on the Draft Post-Closure Care (PCC) Guidance and comments received on that draft guidance.

Guidelines for Evaluating and Adjusting the Post-Closure Care Period for Hazardous Waste Disposal Facilities under Subtitle C of the Resource Conservation and Recovery Act (RCRA)

method that describes the extraction of semivolatile organic compounds from samples collected by Method 0010, replacing Sample Preparation section of Method 0010 (SemiVOST)

Orcr

Papers

Validated Test Method 1314: Liquid-Solid Partitioning as a Function of Liquid-Solid Ratio for Constituents in Solid Materials Using An Up-Flow Percolation Column Procedure

Validated Test Method 8323: Determination of Organotins by Micro-Liquid Chromatography-Electrospray Ion Trap Mass Spectrometry

Validated Test Method 5035A: Closed-System Purge-and-Trap And Extraction For Volatile Organics In Soil And Waste Samples

Guidelines for Evaluating and Adjusting the Post-Closure Care Period for Hazardous Waste Disposal Facilities under Subtitle C of the Resource Conservation and Recovery Act (RCRA)

Validated Test Method 3542A: Extraction of Semivolatile Analytes Collected Using Method 0010 (Modified Method 5 Sampling Train)