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Long-Term Use of Bioretention for Heavy Metals Removal

Bioretention has been shown to effectively remove heavy metals from stormwater runoff, which makes it a very useful design tool. However, there are two common concerns related to long term use of bioretention for heavy metals removal: (1) When will breakthrough occur, i.e. when will the binding sites be saturated so that dissolved heavy metals… More

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Writing Bullet Proof Resistant Soil Specifications

Writing Bullet Proof Resistant Soil Specifications By Howard Stenn, Stenn Design Soil specifications with unnecessary, contradictory or unverifiable standards are an invitation for plant and drainage problems, project delays, and ensuing conflicts over responsibility. Problematic provisions often accumulate in office specifications—added for a particular project or not removed when a divergent section is added –and… More

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Tree Growth Tested in Silva Cells for 5 Years

Hadlow College/University of Greenwich Case Study At DeepRoot we love to see results. Proven, tested, and validated. A recent study was completed at the University of Greenwich, Hadlow College by Duncan Goodwin. The study planted several trees in different growing conditions and monitored their growth for 5 years. While formal results of the tests will… More

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The Importance of Soil Structure

Soil structure (how soil particles are held together to form larger structures within the soil) is recognized as an important property of a healthy soil. Grading, tilling, soil compaction and screening soils during the soil processing and mixing process damages structure.  To counteract the loss of structure, specifiers then add to it, utilizing a mined… More

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