Articles
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ESFR Sprinkler Protection of Class II Commodity in Cold Storage Warehouses using Propylene Glycol Antifreeze Agent
Currently, the NFPA standard for the installation of sprinkler systems (NFPA 13) requires that early suppression fast response (ESFR) sprinklers be specifically listed for use with antifreeze mixtures due to the concern that antifreeze will contribute to the combustion energy of the fire. The effectiveness of an ESFR sprinkler system in suppressing a fire depends on the antifreeze concentration, ...
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Playing Dirty: Analysis of hazardous chemicals and materials in games consoles
The use of hazardous chemicals and materials in electronic products is widespread. Despite some recent improvements – a result of a combination of legal restrictions in some parts of the world, and voluntary action by companies – many devices still contain a variety of hazardous substances. These include chemicals which fall outside current legislative controls, as highlighted in recent studies ...
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NASA national aviation operations monitoring service advisory
In a memorandum dated Nov. 19, 2007, the NASA administrator directed the chief of the Office of Safety and Mission Assurance to lead an effort to release as much NAOMS survey information as possible by the end of 2007. This effort is referred to as Phase 1 of the NAOMS information release. The tasking was executed on Dec. 31, 2007, with the posting of NAOMS information on the NASA website. Phase ...
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A guide for multi-cultural community groups
No one knows your community better than you do. As a community-based organization, community leader or activist, you are in a unique position to take the lead in raising awareness about resource conservation, good solid waste management, and safeguarding the environment for future generations. Did you know that: Over 230 million tons of garbage are produced annually in the United States—that ...
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Bridging the gap between EH&S and technology
“IT Insight” is a new bimonthly column that will look at the wide world of information technology, with a focus on emerging tools and technologies for managing environmental, health, and safety data. Today’s environmental professional is faced with the challenge of sustaining an efficient and cost-effectiveenvironmental, health, and safety (EH&S) management process in an economy dominated by ...
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Pour plates or streak plates?
The pour plate method of counting bacteria is more precise than the streak plate method, but, on the average, it will give a lower ...
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Influence of shifting positions of ser, thr, and cys residues in prenisin on the efficiency of modification reactions and on the antimicrobial activities of the modified prepeptides
Since the recent discovery that the nisin modification and transport machinery can be used to produce and modify peptides unrelated to nisin, specific questions arose concerning the specificity of the modification enzymes involved and the limits of their promiscuity with respect to the dehydration and cyclization processes. The nisin leader peptide has been postulated to fulfill a recognition and ...
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Hydraulic conductivity of compacted clay liners permeated with inorganic salt solutions
Due to their low permeability, geosynthetic clay liners (GCLs) and compacted clay liners (CCLs) are the main materials used in waste disposal landfills. The hydraulic conductivity of GCLs and CCLs is closely related to the chemistry of the permeant fluid. In this study, the effect on the hydraulic conductivity of clays of five different inorganic salt solutions as permeant fluid was ...
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Using pipeline integrity rule for pipeline inspections
Historically, transportation of oil and gas by pipelines remains the safest and most economical mode compared with other modes. However, pipeline integrity does cause a concern to the public and environment along the pipeline route because it is ever present at the location for its useful life. U.S. pipeline failure incidents in the late ’90s accelerated the process of mandating pipeline ...
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Unit pricing of household garbage in Melbourne: improving welfare, reducing garbage, or neither?
Charging for household garbage collection per unit of waste is becoming more popular. Discussions in the practical literature focus on unit pricing as a way to encourage diversion to recycling and reduction in waste, but the economics literature emphasizes welfare maximization through charging at the marginal social cost. In the present study unit pricing was examined from both perspectives ...
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Door Manufacturer Treatability
Integrated Engineers conducted a treatability test that showed the Floccin K worked extremely well at a dosage of 3 grams/1,000 ml of wastewater (treatment dosage of 25 lbs. of Floccin-K to 1,000 gallons of wastewater) with the addition of 0.5 ml of 20% diluted caustic. The treated pH was 7.0. The floc formed was good and the water clarity is ...
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Publish and be damned
Just as effective environmental and social reporting now enhances corporate performance, greater disclosure on environmental performance also enhances investment appeal. There is a long history of the development of disclosure in financial reporting. As issues arise, financial analysts, regulators, investors and creditors raise a call for greater disclosure, which is eventually heeded by the ...
By AHC Group
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Watching over high tide
Solid provides a reliable and accurate solution for control of sea water level in one of New Zealand's bay reserves. Onehunga Bay Reserve in Auckland, New Zealand, provides its residents with both marine and land facilities. One of them is a recreational sea water pool that serves as a natural pool for swimming and water sports, and a private docking place for small yachts. The Problems ...
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Meeting the carbon reduction commitments
How UK Organizations Can Approach and Meet Carbon Reduction Targets The Climate Reduction Commitment legislation represents significant opportunities for those entities that are proactive and are able to meet or exceed their carbon reduction targets. As it is expected that up to 20,000 firms in the UK will have to submit a CRC information disclosure by the summer of 2010, more education is ...
By Accruent
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Deep, DNAPL remediation Portland, OR
In 1999, the senior managers of TRS Group, Inc (TRS) while working for a former employer, as a subcontractor toAMEC, provided Electrical Resistance Heating (ERH) for VOC-impacted groundwater at a commercial site in Portland,Oregon. The remediation was conducted under the Oregon Department of Environmental Quality (DEQ) Voluntary Cleanup ...
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Economics and gender: issues of environment and valuation
The neoclassical economic approach portends much to the resolution of gender conflict. Within the Pigovian market failure perspective, the focus is on "economic valuation" as a basis of correcting existing prices and establishing the optimum level of economic activity. The thrust of this paper is that the failure of neoclassical application to gender issues is probably irrevocable as a ...
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An ethical analysis of the precautionary principle
The debate over the precautionary principle is intimately linked with values and worldviews. I examine how diverging conceptions of "the good world" affect the conceptualisation of the precautionary principle. Three complementary conceptualisations emerge; 1) a call for a change in attitude, 2) a prescription for formalistic action and 3) guidance for contextual action. I apply these ...
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A case study of critical point identification in the physical and communication layers of a small urban transportation system
Surface transportation is an important critical infrastructure as it provides the essential services that highly impact a nation's economy. It is important to identify and protect the essential components of the transportation system to ensure its survivability. This paper describes critical point identification of a small urban intelligent transportation network. The analysis was conducted for ...
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Removal of hazardous dye reactofix navy blue 2 GFN from industrial effluents using electrochemical technique
Azo dyes continue to be a source of pollution in industrial processes that utilise dyes to colour paper, plastic, food, pharmaceutical products as well as natural and artificial fibre. Effluents containing azo reactive dyes are very difficult to treat in environmental system, owing to the sulphonic group, which makes the dye water soluble and very polar and difficult to treat by conventional ...
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The irruption of new agro-industrial technologies in Uruguay and their environmental impacts on soil, water supply and biodiversity: a review
In recent years, economic growth has produced a global change in the demand for food, fibre and energy supply. This has gone together with the globalisation of the agro-industrial production systems, leading to a qualitative change in land use because of intensive use of technological inputs. Uruguay, just as the other countries of the region, is part of this phenomenon. The massive introduction ...
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