Step 3 Environmental Systems

assignment

Reduction of influent (or effluent) impacts

• Water from precipitation running overland picks up contaminants, including animal-derived bacteria.
• Stormwater pollution has contributed to closing thousands of acres of productive shellfish growing areas.
• Stormwater runoff can also close swimming beaches and contaminate drinking water supplies.
• Mackworth can assist with evaluation, design, fabrication, deployment and O&M for filter barrier systems to reduce concentrations of sediments, chemicals and/or debris from discrete effluents, e.g., industrial site drainage, construction site drainage, or CSO’s.
• Debris barriers will have much larger mesh and are likely to be designed so that built-up debris can be removed and managed as part of normal operations.
• Coal pile and coal ash pile storage and mining site storm water management pose special challenges.
• Mackworth personnel have direct experience with both and systems can be designed, often with multiple barriers filtering out first large and then finer particles with successive barriers.
• Barriers are a key element in settling pond system design to minimize the amount of space required for the settling ponds/sedimentation basin.
• Mackworth aquatic barrier technologies may also be part of the solution for impacts that are cumulative, from non-specific sources that ultimately discharge via culverts, creeks or streams into a river, pond, lake or harbor.
• In a number of states they have been recognized as a Best Management Practice (BMP) for such control.
• Nutrient loading into a surface water body often contributes to eutrophication leading to algal blooms, profusions of pond weeds and even anoxic conditions.
• No simple barrier system will eliminate such nutrient input, but barrier systems may be used to reduce the bloom-causing pulsation that may seasonally provide the nutrient dose may be key to the development of noxious blooms.
• Mackworth system designers, scientists and engineers understand the factors that are important to design of such a system.
• There are many situations where a barrier can be designed that can be deployed and maintained by volunteers working for a lake association.

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