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High Hopes for Cattails
As other areas of wastewater treatment go high tech, man-made wetlands are treating wastewater from small towns and coal mines. Plants are grown in about 1 ft of water. Suspended solids...

Risk Analysis and Management of Natural and Man-Made Hazards
The third Engineering Foundation Conference on Risk-Based Decisionmaking titled Risk Analysis and Management of Natural and Man-Made Hazards was held in Santa Barbara, California on November...

Coastal Barrier Island Management in Florida
Coastal barriers in Florida have experienced the brunt of the state's rapid population growth. Excessive development of these environmentally sensitive areas has destroyed...

Ponds and Lagoons of Gulf Islands National Seashore
A physical and natural resource survey was conducted of the ponds and lagoons on Horn and Petit Bois Islands, Gulf Islands National Seashore, Mississippi. Petit Bois Island contains 17...

Incremental Risk Analysis in Teaching Institutions
Institutions engaged in research and teaching in the natural sciences, constitute a diffuse source of chemical emissions. As many institutions embark on ambitious building programs, communities...

Environmental Risk Assessment at a Gas Utility
Over the past 10 years, Southern California Gas Company (SoCalGas) has developed an environmental risk management program to mitigate or eliminate the potential health risks to employees,...

Monte Carlo Simulations of Uncertainties in Risk Assessments of Superfund Sites Using Crystal Ball?
Most health risk assessments for Superfund sites combine a series of worst case assumptions to derive a 'point estimate' of risk that is 'conservative,'...

Hazardous Waste Disposal: An Attitudinal Affront
Modern disposal facilities are thorough and conscientious in their methods. Environmentally sound practices are essential to protect the company and its clients from liability. The average...

Challenges Posed by Large-Scale Asbestos Abatement Projects in Occupied High-Rise Buildings
The challenges posed by a large-scale asbestos abatement project are great: providing a safe indoor environment for building tenants and property that is liability-free for the building...

Study of Direct Potable Reuse of Reclaimed Wastewater: Preliminary Results
The study includes a comprehensive attempt to measure as many as possible of the parameters which may effect the public health risk associated with reuse of municipal wastewater, after...

The Application of Risk Assessment at Hazardous Waste Sites
This paper discusses some of the recent innovative uses of risk assessment at hazardous waste sites. Important developments in both methodology and application are as follows: quantitative...

Risk Assessment for the Multiple Threat from Dioxin Analysis
In this paper, the author focuses on the integrated method of estimating the risks and the evaluation of the risk acceptability based on a systematic classification of all risks involved...

A Practical Approach for Evaluating Environmental Risk
Risk management and assessment techniques are increasingly being used to project public health risks at hazardous wastes sites. Few studies have quantitatively evaluated the environmental...

Risk Assessment for TCE and Related Chemicals Based on Multi-Component, Multi-Media Transport Models
Trichloroethylene (TCE) is known to undergo anaerobic transformation and produces daughter products including dichloroethene, and vinyl chloride which have been known as possible carcinogenic...

Instrumentation of Landfill Cover Liners: Moisture Transport Studies
Accurate estimation of the amount of water leaking through the cover liner, into the landfill, is vital for estimating the possible amount of leachate that can be generated into a landfill...

Closure of Hazardous Surface Impoundments and Creation of an On-site Permanent Disposal Facility?A Case History
Remington Arms Co. is currently undertaking a RCRA closure program for nine surface impoundments in Lonoke, Arkansas. The impoundments contain a variety of listed hazardous wastes from...

Hazardous Waste Impacts on the Highway Planning and Property Acquisition Process
Since the advent of increased public awareness concerning hazardous waste and the enactment of statutes governing these wastes, hazardous waste has become an important component impacting...

Toxicity Reduction in Soil-Based Treatment System
With the introduction of environmental; regulations such as RCRA, HSWA, CERCLA and SARA, the treatment of hazardous wastes in soil-based systems is required to be protective of human health...

Fate and Effect of Carbon Tetrochloride and O-Xylene on Anaerobic Systems with Sulfate Reducing Bacteria
The fate and effects of o-xylene and carbon tetrachloride on methanogens and sulfate reducing bacteria were investigated using serum bottles. Up to 750 mg/1 of o-xylene did not cause any...

Simulation of Oxygen Dynamics in the Vadose Zone
A microcomputer model VIP (Vadose Zone Interactive Processes) was developed as an extension of the RITZ model to provide a mathematical description of land treatment systems for the disposal...

 

 

 

 

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