Health & Safety Articles

  • Indoor Cats Improve Quality of Exhaust Emissions

    For over two decades, the automotive industry has struggled to keep up with emission standards by installing emission control systems that are increasingly more sophisticated and expensive.  In the meantime, emission control for materials handling equipment has not been a major concern. Without having to meet stringent ...


    By DCL International Inc.

  • The Asbestos Management and Maintenance Program

    STEP ONE: ASSESSMENT AND SURVEYThe first step of the Asbestos Management Program is to do an asbestos survey to assess the location, identify the type of asbestos, the condition of the asbestos and identify a maintenance record. This asbestos inventory or assessment is usually carried out by an independent consulting firm. This assessment or survey will include: Identification and location of the ...


  • Two Case Histories of Industrial Water Reuse Via Membrane Technology

    Abstract This paper describes two successful applications of ultrafiltration (UF) and reverse osmosis (RO) membrane technology used to reclaim water, reduce waste water discharge costs. The first case history covers oily waste water treatment at a major aluminum beverage can manufacturing plant. The second case describes treatment of waste water from a multi-plating bath section of a major ...


  • In Situ Remediation Technology Status Report: Hydraulic & Pneumatic Fracturing

    The purpose of this document is to describe recent field demonstrations, commercial applications, and research on technologies that either treat soil and ground water in place or increase the solubility and mobility of contaminants to improve their removal by pump-and-treat remediation. It is hoped that this information will allow more regular consideration of new, less costly, and more effective ...


  • Application of Membrane Technology for the Recovery and Reuse of Water

    Abstract As water and sewer costs are expected to increase over the next decade, membrane technology will continue to be a viable and economical option in the recovery and reuse of water. This paper describes the mechanism of membrane effected separation (specifically reverse osmosis, ultrafiltration and microfiltration), membranes commercially available, membrane element configurations, and how ...


  • Nonaqueous Phase Liquids Compatibility with Materials Used in Well Construction, Sampling, and Remediation

    The EPA Regional Ground Water Forum is a group of EPA professionals representing Regional Superfund and Resource Conservation and Recovery Act Offices (RCRA), committed to the identification and resolution of ground-water issues impacting the remediation of Superfund and RCRA sites. The Forum is supported by and advises the Superfund Technical Support Project. The compatibility of remediation, ...


    By QED Environmental Systems

  • Product Redesign of Chemical Standards Improves Atrazine and Simazine Stability - Verified by GC

    Supelco routinely monitors its chemical standard products to determine shelf-life quality.  Atrazine and simazine, two triazine herbicides included in US EPA Methods 505 and 525, are unstable in methanol.  This application note describes the Supelco reformulation of four chemical standards containing these analytes, each originally prepared in methanol.  Accelerated stability ...


    By Sigma-Aldrich Co., LLC

  • Geo-Environmental Assessment of a Micaceous Soil for Its Potential Use as an Engineered Clay Barrier

    The ability of the fine fraction of a natural micaceous soil in the Stanleyville area near Perth, Ontario, to retard an acidic waste leachate is examined. Batch and leaching column tests were used to investigate the retention capcity of the natural soil. To investigate the effect of ion competition on adsorption/desorption capacity of the soil, single and multi-components of Pb2+ and Zn2+ were ...


    By ASTM International

  • Design and Evaluation of a Flow Pump System for Column Testing

    The design of the equipment components of a flow pump system for the measurement of solute (effluent) breakthrough curves from soil columns is described. In addition, the performance of the system in terms of the effects of equipment components and temperature on measured differential pressure fluctuations across soil specimens is illustrated. The flow pump for the system provides continuous flow ...


    By ASTM International

  • Cutting hazardous waste costs and liability case study

    The AH-64A Apache Combat helicopter, a prominent fixture in Operation Desert Storm, is manufactured by McDonnell Douglas Helicopter Systems of Mesa, Arizona, using the latest and most technologically advanced methods and techniques. However, outdated technology and equipment were being used in the management and minimization of the company's hazardous waste. The manufacturing processes at the ...


    By Waste Control Systems Inc

  • Torsional Motion Monitoring System for Small-Strain (10−5 to 10−3%) Soil Testing

    For accurate measurements of stress-strain hysteresis loops at strains below 10-3%, a torsional motion monitoring system was modified to incorporate micro-proximitors. A micro-proximitor system with enlarged target arms resulted in about 50 times higher resolution in motion monitoring than previously possible. The four proximitor signals (instead of two) were measured, compared, and averaged to ...


    By ASTM International

  • The Waste Minimation National Plan

    Executive Summary The U.S. Environmental Protection Agency (EPA) is committed to making pollution prevention the guiding principle of the Agency's environmental efforts. The 1984 Amendments to the Resource Conservation and Recovery Act and the 1990 Pollution Prevention Act set in policy the preference for source reduction over waste management. EPA is reaffirming this commitment. With the release ...


  • General Air Sampling Guidelines (PDF)

    This Standard Operating Procedure (SOP) provides guidance in developing and implementing sampling plans to assess the impact of hazardous waste sites on ambient air. It presents the United States Environmental Protection Agency/Environmental Response Team's (U.S. EPA/ERT's) approach to air sampling and monitoring and identifies equipment requirements. It is not within the scope of this SOP to ...

  • A New Approach to Measuring Dilatancy in Saturated Sands

    The determination of in situ properties of sand has proven to be a difficult objective, especially when it includes assessing volume change characteristics like dilatancy. Difficulty in obtaining representative undisturbed specimens as well as problems with extrapolating laboratory test results to the field has caused many to place increased reliance on in situ testing. One such test that is ...


    By ASTM International

  • Ammonia Emergency Plan Calls on Packed Tower to Scrub Released Chemicals,

    A few years ago Union Camp turned a corner.  Management decided that advance planning would take the place of reacting after the fact to an emergency or regulatory agency demands.  At Union Camp’s Dover, OH. facility, byproducts of the paper industry are converted into usable specialty chemicals for cosmetics, adhesives and other industries. Crystallization is a process used intensively ...


  • Emphasis Shifting to Toxicity Reduction

    Untitled Document Under the Clean Water Act (CWA), the U.S. Environmental Protection Agency (EPA) established the National Pollutant ...


    By Calgon Carbon Corporation

  • High technology comes to Hazardous waste disposal – Case Study

    Skyrocketing hazardous waste disposal costs for the USC/ Division, of C.R. Bard, Inc., Billerica, Massachusetts led them to a high technology solution. USC/, a medical products manufacturer that develops and produces angioplasty catheters, had seen its solid hazardous waste disposal costs rise to almost $500 per 55- ga/lon drum, excluding costs associated with inplant storage, handling, and ...


    By Waste Control Systems Inc

  • Dry/Wet Scrubbers for Clean Air Compliance

    Forthcoming requirements of Ihe Clean Air Act Amendments of 1990 will inventory many more specific chemicais considered hazardous. From acetaldehyde lo xylenes, the list regulated under the air toxics program includes 189 hazardous air pollutants (HAPs). That number may grow. The Environmental Protection Agency (EPA) intends to add another 100 of more chemicais under the “prevention of accidental ...


  • The Thermal Probe—Measurement of the Thermal Conductivity and Drying Rate of Soil in the Field

    The thermal probe is a metal rod with an internal heating element and temperature sensor. In the field it is pushed into a predrilled hole in otherwise undisturbed soil, and the thermal properties of the soil are estimated from the temperatures recorded at intervals after a constant power is supplied to the heating element. The following are discussed in this paper: the theory behind the methods ...


    By ASTM International

  • A New Apparatus for the Evaluation of Electro-Kinetic Processes in Hazardous Waste Management

    Possible uses of electro-kinetics for hazardous waste site remediation are being investigated. This paper describes a new apparatus which has been specifically designed, fabricated, and assembled to evaluate the viability, feasibility, practicality, and potential costs of these conceivable techniques experimentally. Results of studies on the existence of electro-osmotic flow in compacted clay and ...


    By ASTM International

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