Plug and Abandonment Procedures for Onshore Wells and the Utilization of Reserved Abandonment and Site Restoration ASR Funds

Decades of mining in South Korea have resulted in the contamination of large amounts of soil by metals. The most feasible approach to site restoration requires the use of a stabilization agent to reduce metal mobility. This study examined the leaching characteristics of limestone used as a stabilization agent when subjected to solutions of differing pH. In a laboratory-scale column test, solutions with pH values of 3.5, 4.6, and 5.6, representing acidic to nonacidic rainfall, were applied to soil mixed with limestone. Test results indicate that metal components can be released with the addition of acidic solutions, even if the soil is highly alkaline. Cd and Zn, in particular, exhibited abrupt or continuous leaching when exposed to acid solutions, indicating the potential for contamination of water systems as metal-laden soils are exposed to the slightly acidic rainfall typical of South Korea. Treatment using stabilization agents such as limestone may reduce leaching of metals from the contaminated soil. Stabilizing metal-contaminated farmland is an economical and feasible way to reduce pollutants around abandoned metal mines.

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E&P Site Restoration in Sensitive Wetland Environments

10.2118/52711-ms ◽

1999 ◽

Author(s):

M.S. Kudla ◽

B.W. McDole

Keyword(s):

Site Restoration

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Summary of operations and performance of the Murdock site restoration project in June 2005-December 2006.

10.2172/925355 ◽

2007 ◽

Author(s):

L. M. LaFreniere

Keyword(s):

Restoration Project ◽

Site Restoration ◽

And Performance

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Temporal variations in the rooting ability of cuttings of Populusbalsamifera and Salixplanifolia from natural clones–populations of subarctic Quebec

Canadian Journal of Forest Research ◽

10.1139/x93-323 ◽

1993 ◽

Vol 23 (12) ◽

pp. 2603-2608 ◽

Cited By ~ 11

Author(s):

Gilles Houle ◽

Patrice Babeux

Keyword(s):

Root Length ◽

Adventitious Roots ◽

Growing Season ◽

Temporal Variations ◽

Bud Break ◽

Root Number ◽

Rooting Ability ◽

Coefficients Of Variation ◽

Site Restoration ◽

Great Root

Temporal variations in the rooting ability of cuttings from five clones of Populusbalsamifera L. and five populations of Salixplanifolia Pursh from the Great Whale River valley in subarctic Quebec were determined. Cuttings were sampled monthly from May through October and rooted in a greenhouse. Root number and length of the longest root per cutting were determined 35 days after planting. There were significant variations among the six sampling dates in the rooting potential of cuttings of both species. A higher percentage of cuttings formed adventitious roots in May and June before or shortly after bud break than later, during the growing season; root number and length followed a similar trend. There was an increase in the rooting ability of cuttings of both species towards the fall period. Salixplanifolia produced more roots per cutting than P. balsamifera early in the season (i.e., May and June), but later in the season the differences between the two species were not great; root length showed no such trend. Differences among clones–populations in the rooting potential of cuttings were large for both species. Coefficients of variation for root number were lower in spring than later, during the growing season, for both P. balsamifera and S. planifolia. Seasonal trends in coefficients of variation for root length were not as evident as for root number. These results have significant implications for site restoration in the Subarctic. To optimize the rooting ability of cuttings and minimize the differences among clones–populations in rooting potential, cuttings should be sampled early in the season before bud break or shortly thereafter.

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