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Pump/Recharge Rate Affects Saltwater Intrusion
Untitled Document Many areas of the world use groundwater as their main source of fresh water supply. With the worlds population increasing at alarming rates, the fresh water supply is being continually depleted, increasing the importance of groundwater monitoring. One of the major concerns most commonly found in coastal aquifers, is the induced flow of salt water into fresh water aquifers caused by groundwater development, known as salt water intrusion. In places where groundwater is being pumped...
Down-hole tomography
This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully applied. Click on a section below and you will be shown a full 2D resistivity imaging brochure detailing the case in question. Acknowledgement: These cases have been submitted by satisfied customers whom we thank for permission to publish their data on the web. Each detailed broschure will have a citation for the source of the...
Modelling the Long-term Release of Sulphate from Dump Sediments of an Abandoned Open Pit Lignite ...
The generation of acid drainage from overburden spoil piles at open-pit lignite mines impacts water quality in large parts of the Lusatian mining area in Germany. The Lohsa Mine was exploited until the early 1990s and is to be flooded by 2005. It will then be used as a reservoir basin for the river Spree. Future acidity and sulphate concentrations in the surface water are of great interest because considerable amounts of the bank filtrate of the river are used to supply drinking water to communal water plants...
Dam investigations
This is a collection of various cases where the 2D resistivity imaging method pioneered by Advanced Geosciences Inc have been successfully applied. Click on a section below and you will be shown a full 2D resistivity imaging brochure detailing the case in question. Acknowledgement: These cases have been submitted by satisfied customers whom we thank for permission to publish their data on the web. Each detailed broschure will have a citation for the source of the data. Resistivit...
Development of a Solid-Phase Microextraction-Based Method for Sampling of Persistent Chlorinated ...
Solid-phase microextraction (SPME) has been used as an in situ sampling technique for a wide range of volatile organic chemicals, but SPME field sampling of nonvolatile organic pollutants has not been reported. This paper describes the development of an SPME-based sampling method employing a poly(dimethylsiloxane) (PDMS)-coated (100-ím thickness) fiber as the sorbent phase. The laboratory-calibrated PDMS-coated fibers were used to construct SPME samplers, and field tests were conducted at three coastal...
Performing CALPUFF Analyses with Pseudo-station Data Derived from MM5 Data
The U.S. Environmental Protection Agency (EPA) recommends that CALPUFF be used as the preferred model for long-range transport analyses in the proposed “Guideline on Air Quality Modeling” (April 2000). In practice, CALPUFF has been routinely required by the Federal Land Managers (FLM), EPA, and state regulatory agencies for Class I area analyses for several years. These analyses include regional haze, acid deposition, and Class I increments in support of Prevention of Significant Deterioration (PSD) permit...
In Situ Chemical Oxidation Remediation Pilot Study Of A Karst Bedrock Aquifer Contaminated With ...
ABSTRACT A pilot study to evaluate an innovative in situ treatment technology was implemented at Letterkenny Army Depot, Chambersburg, Pennsylvania, for a limestone bedrock aquifer contaminated with chlorinated solvents. This technology destroys VOCs in groundwater, utilizing a network of injection points to deliver a solution of hydrogen peroxide (50%), catalysts, and surfactants. The chemical reaction generated by this solution creates a hydroxyl radical, which is extremely effective in oxidizing complex...
The Influence of an Integrated Remedial System on Groundwater Hydrology
ABSTRACT This paper summarizes the development of a remedial system designed to hydraulically contain and ultimately reduce a plume consisting of primarily 1,1,2,2-tetrachloroethane (1,1,2,2-TeCA). The system consists of groundwater circulating wells or extraction wells located in the core of the 1,1,2,2-TeCA plume to provide active source control, combined with monitored natural attenuation (MNA) and phytoremediation instituted to further reduce dissolved-phase contaminants. Monitoring of natural attenuation...
Odor Control Advances at Composting Facility
The Rockland County (New York) Cocomposting Facility began operations in February, 1999, processing biosolids from the five publicly owned treatment works (POTWs) in the county. The Rockland County Solid Waste Management Authority (RCSWMA) owns the facility, but contracted with Waste Management of New York to design, build and operate (DBO) the 110 wet tons/day agitated bin composting facility located in Hilburn. From the earliest stages of development, RCSWMA has focused on odor control provisions for the...
Banks and Environment Protection - an Assessment
Only Average Results in the Environmental-Rating of Europe‘s Forty Most Prominent Banks Switzerland is one of the world‘s most important places for banking. That the Swiss banks are also ahead of their competitors in the area of environmental protection is just one of the findings of an international Environmental-Rating survey published today by oekom research. With grades of C+ each, the two major Swiss banks UBS and Credit Suisse came in as the current environmental leaders in the European banking business....
Integration of Subsurface Data Management and GIS to Facilitate Model Calibration
Abstract The development of numerical codes, as well as pre- and post-processors to support these codes, has made the discipline of groundwater modelling increasingly more automated and efficient. The value of such modelling is reliant on the site-specific data used to build and calibrate the models. The integration of EarthSoft`s EQuISÒ Geology and any of several popular modelling environments results in a data management and analysis system that is more complete than the modelling system alone. Water level...
Cart-Based Organics Collection. Citizens Drive 65 Percent Diversion System
For better or worse, citizens opposing waste management projects usually end up being labeled as NIMBYs — not in my backyard. This could have been the case in Halifax, Nova Scotia but instead, the citizens took their opposition one step further, basically taking the design for an acceptable waste management system into their own hands. In the process, they laid out the foundation for an integrated strategy for the four municipalities that now make up the Halifax Regional Municipality (HRM) that was adopted and...
Modification of the Hazardous Waste Program: Hazardous Waste Lamps. Final Rule - July 6, 1999
Today`s final rule adds hazardous waste lamps to the federal list of universal wastes regulated under the Resource Conservation and Recovery Act (RCRA). Handlers of universal wastes are subject to less stringent standards for storing, transporting, and collecting these wastes. The Agency has concluded that regulating spent hazardous waste lamps as a universal waste under 40 CFR Part 273 will lead to better management of these lamps and will facilitate compliance with hazardous waste requirements. Today`s final...
Coal Mining and Production Industry - Pollution Prevention Guidelines
Introduction Pollution Prevention Guidelines to provide technical advice and guidance to staff and consultants involved in pollution-related projects. The guidelines represent state-of-the-art thinking on how to reduce pollution emissions from the production process. In many cases, the guidelines provide numerical targets for reducing pollution, as well as maximum emissions levels that are normally achievable through a combination of cleaner production and end-of-pipe treatment. The guidelines are designed to...
Mercury Emissions From The Disposal of Fluorescent Lamps
The Environmental Protection Agency (EPA) is making available to the public a study containing information relating to its Proposed Rule addressing the management of mercury-containing lamps under the Resource Conservation and Recovery Act Subtitle C hazardous waste management system published in the Federal Register on July 27, 1994, 59 FR 39288. The study consists of an electronic model and report that provides an assessment of mercury emissions from the management of mercury-containing lamps under different...
Calculating Accidental Release Flow Rates From Pressurized Gas Systems
When determining the consequences of accidental release flow rates from pressurized gas systems, it is important to select the appropriate type of air pollution dispersion model. For released gases which are lighter than or equal to the ambient air density, Gaussian dispersion models as described in Beychok`s text1 should be used. For released gases which are heavier than air, a dense gas model such as SLAB2 or DEGADIS3 should be used. It is also important to determine realistic flow rates for accidental release...
Field Analytical and Site Characterization Technologies: Summary of Applications
Abstract This report provides information about experiences in the use of field analytical and site characterization technologies at contaminated sites drawn from 204 applications of the technologies listed below. For each technology, information is presented on the reported uses of the technology; including the types of pollutants and media for which the technology was used; reported advantages and limitations of the technology; and cost data for the technology, when available. Information was obtained from...
Common Treatment Technologies for Radionuclides in Soil, Sediment, and Sludge
Unlike organic contaminants (and similar to metals), radionuclides cannot be destroyed or degraded; therefore, remediation technologies applicable to radionuclides involve separation, concentration/volume reduction, and/or immobilization. The most commonly used treatment technology for radionuclides in soil, sediment, and sludge is solidification/stabilization (S/S). This treatment technology is described briefly below. Solidification processes produce monolithic blocks of waste with high structural integrity....
Comparative Risk Assessment
` Comparative risk assessment provides a systematic way to compare environmental problems that pose different types and degrees of health risk. It combines information on the inherent hazards of pollutants, exposure levels and population characteristics to predict the resulting health effects. Using data from available sources, rapid, inexpensive comparative risk assessments can identify the most significant health problems. Together with consideration of costs, technical feasibility and other factors, the...
Ionising Radiation
Introduction The energy level of some types of radiation is high enough so that when they interact with matter they cause the formation of electrically charged particles or ion-pairs and break molecular bonds. These so-called ionising radiations are by their nature potentially harmful to life; at high doses they can be lethal and at lower doses can cause genetic damage. Ionising radiation occurs naturally, and life on Earth has always been exposed to it. Human activities can, however, enhance exposure, and new...
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