Big Chemical Encyclopedia

Chemical substances, components, reactions, process design ...

Articles Figures Tables About

Pump-and-treat systems

For practitioners of in situ technologies, note that U.S. EPA has issued a policy statement that reinjection of contaminated groundwater is allowed under Resource Conservation and Recovery Act (RCRA)35 36 as long as certain conditions are met. This policy is intended to apply to remedies involving in situ bioremediation and other forms of in situ treatment. Under this policy, groundwater may be reinjected if it is treated aboveground prior to reinjection. Treatment may be by a pump-and-treat system or by the addition of amendments meant to facilitate subsurface treatment. Also, the treatment must be intended to substantially reduce hazardous constituents in the groundwater (either before or after reinjection) the cleanup must be protective of human health and the environment and the injection must be part of a response action intended to clean up the environment.37... [Pg.999]

A pump-and-treat system consists of an extraction and a treatment component. Groundwater is typically extracted through vertical groundwater recovery wells although, in the last decade or so, horizontal wells and trenches have also been employed. Variables in the design of a typical system include87... [Pg.1030]

Because of the high water solubility of oxygenates, groundwater extraction may be effective in removing a significant mass of these contaminants. Key factors that affect the performance and cost of the extraction component of a pump-and-treat system include... [Pg.1034]

U.S. EPA. Cost Analyses for Selected Groundwater Clean-up Projects Pump-and-Treat Systems and Permeable Reactive Barriers, EPA 542-R-00-013, United States Environmental Protection Agency, Washington, DC, February 2001. [Pg.1053]

Cohen, R.M., Mercer, J.W., and Greenwald, R.M., EPA Groundwater Issue, Design Guidelines for Conventional Pump-and-Treat Systems, EPA 540/S-97/504, September. Available at www.epa.gov/ada/ issue.html, 1998. [Pg.1053]

In addition, cover systems are also used in the remediation of hazardous waste sites. For example, cover systems may be applied to source areas contaminated at or near the ground surface or at abandoned dumps. In such cases, the cover system may be used alone or in conjunction with other technologies to contain the waste (e.g., slurry walls and groundwater pump and treat systems). [Pg.1059]

Abbreviations dichloroethene (DCE) trichloroethylene (TCE) perchloroethylene (PCE) tiichloroethane (TCA) benzene, toluene, ethylbenzene, and xylene (BTEX) polychlorinated biphenyls (PCBs). Pump-and-treat system only. [Pg.338]

Case Study 1. Pump-and-Treat System with a Packed-Tower Air Stripper, McClellan Air Force Base Superfund Site, California, Operable Units B/C, 1987. The costs associated with pump-and-treat system used at the site were estimated in 1994. Costs were approximately 80 per pound of removed volatile organic compounds (VOCs) based on operating costs alone and approximately 150 per pound when capital costs were included (D141286, p. 135). It should be noted that the operation and maintenance costs for the an air stripper could not be separated from the total cost of the project. Capital cost and operating cost information for this project are summarized in Case Study 1. [Pg.339]

TABLE 1 Cost Comparison Between TreeMediation and Pump-and-Treat System... [Pg.357]

At a site in Ilhnois, TreeMediation was coupled with a pump-and-treat system to mitigate an immediate at-risk situation of off-site movement of a contaminated plume containing nitrogen and pesticides. This problem provided an opportunity to compare the costs of the two systems. Costs are estimated in round numbers for a 1-acre site with an aquifer 20 ft deep. Costs common to both approaches, such as meetings with regulators and laboratory analyses, were not included. Results are given in Table 1 (D12674I, p. 350). [Pg.357]

Groundwater recontamination, as might be seen with traditional pump-and-treat systems, does not occur when all phases are treated together. [Pg.395]

The vendor also incorporates other technologies to act in conjunction with biodegradation, such as air sparging, soil vapor extraction, or pump-and-treat systems. This technology is patented and is commercially available from BioRemedial Technologies, Inc. All information contained herein was provided by the vendor and has not been independently verified. [Pg.409]

The Stripperator was used as part of a pump-and-treat system installed at Camp Lejeune in North Carolina. This system, which was used to remove VOCs, had an average cost of 95,000 per pound of contaminant removed. According to the U.S. Navy, 175,000 was spent on the system to remove 3 lb of contaminants, and 325,000 was spent to remove an additional 0.5 lb. The Navy claims that the high cost of treatment at the site resulted from inefficiencies in groundwater extraction methods and was not caused by the use of the Stripperator (D22770N, p. ES-1, ES-3, 3-18-3-28). [Pg.529]

An in situ system operating at a former semiconductor facility in Cahfomia has a net present value (NPV) over a 30-year lifetime of approximately 4.4 million. This represents a 3.4 million savings over the estimated 30-year NPV for the pump-and-treat system that was formerly operating at the site. Both estimates of NPV include capital as well as operations and maintenance costs (D12777P). [Pg.559]

The vendor supplied an unspecified case study that compared the costs of an existing pump-and-treat system with a pump-and-treat system that had been retrofitted to accommodate an FE ACTIVE. The projected life-cycle cost (adjusted for an inflation rate of 4% and a rate of interest of 5%) of the existing pump-and-treat system was calculated to be 3,930,000 (1996 dollars). The life-cycle cost (adjusted for a 4% inflation rate and a 5% interest rate) of the FE ACTIVE retrofit system was calculated at 945,000 (1996 dollars). Both estimates included capital costs, operation and maintenance expenses, and the cost of groundwater monitoring. Similarly, had the FE ACTIVE system been installed initially, its life-cycle cost would be 1,630,000 (1996 doUars). [Pg.591]

Remediates metals up to 10 times faster than pump-and-treat systems. [Pg.718]

Allows existing pump-and-treat systems to be used to operate the technology. [Pg.718]

Treatment conducted at roughly one fourth the cost of a pump-and-treat system. [Pg.781]

A site-specific, cost-benefit analysis is required to determine if an active remediation system or MNA would be the most effective remediation option (D11322U, p. 8). In 1999, the U.S. Army prepared an analysis of the cost of MNA, in situ bioremediation, and pump-and-treat systems for the treatment of explosives-contaminated groundwater at the Louisiana Army Ammunition Plant in Min den, Louisiana (D22026Y). This comparison is summarized in Table 1. [Pg.812]

At the Sierra Army Depot in Herlong, California, groundwater had been contaminated by trinitrotoluene (TNT) and trichloroethylene (TCE). The 28-acre plume of contaminated ground-water was located about 70 ft underground. The U.S. Army evaluated the cost difference between conventional pump-and-treat systems, ultraviolet (UV) oxidation, granular activated carbon (GAC) filters, and MNA. The active treatments were estimated to cost between 6 and 10 million while MNA costs were estimated to be approximately 1 million (D17451Q). [Pg.812]

Advantages of microbial barriers over conventional pump-and-treat systems are that barriers can eliminate the need for additional treatment, and they do not disrupt the namral flow of groundwater. Furthermore, if contaminants can be volatilized or biodegraded throughout the impacted portion of an aquifer, there is no need for surface treatment systems, discharges,... [Pg.1062]

Pump-and-treat systems for groundwater bioremediation serve two purposes. They aim at containment of the contaminant plume and removal of contaminants via biodegradation. [Pg.266]


See other pages where Pump-and-treat systems is mentioned: [Pg.36]    [Pg.599]    [Pg.691]    [Pg.1023]    [Pg.1035]    [Pg.1035]    [Pg.1036]    [Pg.1038]    [Pg.67]    [Pg.339]    [Pg.357]    [Pg.357]    [Pg.591]    [Pg.599]    [Pg.666]    [Pg.1003]    [Pg.1019]    [Pg.169]    [Pg.198]    [Pg.201]    [Pg.210]    [Pg.11]    [Pg.25]    [Pg.42]   


SEARCH



Pump systems

Pump, pumping system

Pumping systems

Pumps and Pumping

© 2024 chempedia.info