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HDD - Emma - Coggle Diagram
HDD - Emma
Benefits
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dont go deep enough to get into hydrocarbons, so not many contaminants
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Limitations
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if forest area, mixed spray cover (dig sump for waste) 3:1 (3 soils of area and then 1 of waste and sent to lab)
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if other utilities cross paths of HDD machine, new installation may be placed at undesirable depths
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Large costs
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if very deep, HDD can become very expensive