pm2.5 Articles

  • A practical guide to PM2.5

    By now you’ve likely heard about U.S. EPA’s final rules governing the implementation of the New Source Review (NSR) program for fine particulate matter (i.e., particulate matter with an aerodynamic diameter less than 2.5 microns, or PM2.5). ALL4 published two articles in 2008 addressing specific aspects of the PM2.5 NSR rule. ALL4 has since formally established a PM2.5 Team to ...


    By All4 Inc.

  • PM2.5 Air Quality Modeling Updates

    There has been much activity over the past six (6) months that will impact how air quality modeling analyses will be conducted for Prevention of Significant Deterioration (PSD) permit applications with respect to particulate matter less than 2.5 microns (PM2.5).  As the resident air quality modeling expert at ALL4, I thought it ...


    By All4 Inc.

  • Is it time to upgrade the PM2.5 federal reference method?

    The fine particulate matter (PM2.5) Federal Reference Method (FRM) has in many respects been a great success. When the method was implemented, there was some doubt that the state and local monitoring agencies that routinely provide air quality data would be able to manage a program, which often distinguishes one location from another by just a few μg/m3. As it turns out, data from the FRM ...

  • EPA shifts PM2.5 PSD permitting policies

    On August 12, 2009, EPA created a significant stir in the regulated community when it issued an order that signals a significant shift in how the agency intends particulate matter with a diameter less than 2.5 micrometers (PM2.5) emissions to be regulated under the Prevention of Significant Deterioration (PSD) program. The order specifically applied to petitions filed by environmental groups ...


    By Trinity Consultants

  • Performance characterization of the MiniVol PM2.5 Sampler case study

    Measurements were conducted to assess the MiniVol PM2.5 sampler performance for various particle preseparator configurations including flat and cup impaction stages. Laboratory measurements were conducted to determine the impactor collection efficiency as a function of paricle size. Impactor cut points - the aerodynamic particle diameter exhibiting 50% collection efficiency - were 2.5 um (+- 10%) ...


    By Airmetrics

  • Scavenging of PM2.5 by precipitation and the effects of precipitation pattern changes on health risks related to PM2.5 in Tokyo, Japan

    Fine particulate matter (aerodynamic diameter <2.5 μm; PM2.5) poses risks to human health. While precipitation is the main process for decreasing ambient pollutant concentrations, scavenging of PM2.5 by precipitation remains to be investigated. Here we formulated the processes of PM2.5 scavenging by precipitation from observed PM2.5 concentrations ...


    By IWA Publishing

  • Building Energy Modeling 101: HVAC Design and Operation Use Case

    A great deal of energy use in buildings goes toward heating, ventilation, and air-conditioning (HVAC). In 2015, HVAC consumed 15.5 quads. The first step in reducing HVAC energy use is reducing heating and cooling load—i.e., the amount of heat that needs to be added to or removed from a building—typically by reducing heat from equipment and lighting; minimizing unnecessary ...


    By US Department of Energy

  • 4700 Sampler Industrial Park Wastewater Monitoring - InfraServ Knapsack, Germany - Case Study

    The Model 4700 Automatic Refrigerated Sampler from Teledyne Isco, Inc. is used for water quality monitoring at an industrial park operated by InfraServ Knapsack, Germany InfraServ Knapsack InfraServ GmbH & Co. Knapsack KG is the company that operates the Chemical Industrial Park Knapsack. The site is situated in Huerth, south of Cologne in Germany. The park is divided into ...


    By Teledyne Isco

  • The design and build of a process and wastewater treatment plant - Inlet: 900 mc/h - Case Study

    The client Ferrara Food, part of the S.F.I.R. group, is a company operating in the agro-industrial sector. More specifically Ferrara Food operates within the preserved food industry, specialising in tomato processing, from fresh product to semi-finished and finished products. Semi-finished products can be 200kg containers, or 1200kg bigbags, filled through an ...


    By IDRAFLOT

  • Cyanobacterial Blooms

    Cyanobacterial blooms can lead to a depletion of oxygen in the water, a release of toxins, as well as taste and odour problems. Cyanobacteria, also known as blue-green algae are found in the oldest known fossils, dating back 3.5 billion years. They were the organisms that caused the first mass extinction on earth, but are also the reason for the earth as we know it today. They released the first ...


    By LG Sonic

  • Controlling Fugitive Emissions, Part 1: Close Capture Hooding

    Fugitive emissions, in their simplest form, are the uncontrolled release of gases to the atmosphere. Each one of us may contribute fugitive emissions when we fill our automobile gas tanks. The displacement of air inside the gas tank causes gasoline vapor emissions (hydrocarbons) to exit out the fill spout (un-controlled) to ...

  • 99% of Interceptor contamination remediated - Case study

    What is an Interceptor Tank? An interceptor tank is a trap used to filter out hydrocarbon pollutants from rainwater runoff. It is typically used in road construction and on petrol station forecourts to prevent fuel contamination of the water table via runoff. Petrol interceptors work on the premise that some hydrocarbons such as petrol and diesel float on the ...


    By Slick Solutions

  • Can You Avoid Workplace Injuries? What You Need to Know.

    Perfection is an admirable goal but an unattainable standard. While you can’t completely eliminate workplace injuries, you can effectively reduce risk by following these safety tips that apply to any business or industry. 1. Maintain a Clean Workplace ...


    By DJProducts, Inc.

  • Emergency Planning & ADA

    A year ago, Laura, an SCM Team member, fell and fractured her knee cap.  Following surgery, for the next few months, she was non-ambulatory.  She could not walk with that knee.  She became very aware of the difficulties faced by people with special challenges and impairments.  Her experiences bring to mind that whether permanent or temporary, there are times where additional ...

  • Maintaining a pressure reducing valve: 5 things to check

    Like your car, your body and nearly every appliance you own, control valves require regular maintenance to continue working efficiently. However, due to budget and time constraints, we don’t always give our valves the TLC they need to perform at their best. Unfortunately, ignoring pressure reducing valves can mean serious ...


    By Singer Valve Inc.

  • Tire Shredders: An Introduction

    How Does a Tire Shredding Machine Work? Tire shredding is a very common way of preparing scrap tires for disposal or recycle. In order to dispose of tires in a landfill, they must be shredded to various sized chips. The size required depends on the state or area you live in. Tire shredding is also used for recycling tires; crumb tire or tire mulch can be reused to create surfaces on ...


    By ECO Green Equipment

  • How a Specialized Automatic Control Valve Solved Flooding

    The Colombian area of Antioquia creates much of its clean power from hydropower plants along the Guadalupe River. The Guadalupe IV hydroelectric plant generates power with three vertical axis turbines that discharge water below the river level. To prevent flooding, however, the plant needed a solution that ensured the ejector ...


    By Singer Valve Inc.

  • Hurricane MK cyclone system for PM emission reduction on a 2.5MWth biomass boiler at Britton Timbers. (8 760m3/h at 328°C) - Case Study

    Foreword Advanced Cyclone Systems, S.A. (ACS) designed and supplied a Hurricane Cyclone System type MK for particulate matter reduction from the flue gas of a biomass boiler in Australia. The boiler was installed at Britton Timbers, a diversified company with interests in timber harvesting, sawmilling, international timber import and export, and distribution. From humble ...

  • Fine Particulate Series: PM2.5 nonattainment — What you need to know

    In the March 2009 4 The Record article “A Practical Guide to PM2.5,” ALL4’s PM2.5 Team discussed the technical basics of PM2.5 and the specific steps that you can take to assess your position with regard to the challenging regulatory landscape that lies ahead. This month’s article aims to fill in a few technical details regarding PM2.5 nonattainment areas, including a ...


    By All4 Inc.

  • Characteristics of PM2.5 in rural areas of southern Jiangsu Province, China

    To understand pollution level and possible sources ofatmospheric fine particulates in rural areas of southern Jiangsu Province of China, samples of PM2.5 were collected and analyzed in Xueyan Town and Taihu Lake Station over three seasons from July 2002 to January 2003. The mass concentrations of PM2.5 and 14 principal component elements were obtained. The results showed that pollution of PM2.5 ...


    By IOS Press

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