Healing the Scars of Progress with
Water Clarity Solutions
When rainwater or runoff flows over disturbed soil at a construction site, it collects fine particles and debris, resulting in turbid, murky water. These particles carry negative electrical charges, which causes them to repel one another and remain suspended in the water. This phenomenon is why it takes a long time for some sediment ponds to settle naturally.
Chemical Treatment
The coagulation and flocculation process is an essential step in water treatment used to remove suspended solids from water. It works by neutralising particle charges and encouraging fine particles to combine into larger flocs, which can then settle out more easily.
Typically, a soil test is required to determine the appropriate coagulant and the correct dosage rate for the soils within the catchment area. This testing informs the development of a Chemical Treatment Management Plan (CTMP).
A CTMP outlines the chemical treatments to be applied, the appropriate dosage rates, and the treatment methodology required to effectively manage runoff and reduce sediment discharge.
Lamella Plate Clarifier (Siltstopper)
Lamella clarifiers consist of a series of inclined plates at a specific angle (lamella plates). These plates create a large surface area for sedimentation while maintaining a compact footprint.
The system operates by allowing chemically treated influent to flow upward through the inclined plates, where suspended solids settle onto the plate surfaces and slide down into a sludge collection zone at the base of the tank. Clarified water then rises to the top and is discharged, enabling efficient solid removal at higher flow rates compared to traditional sedimentation methods.
Sediment Pond Decant Systems
The pond decant system and sediment retention pond design specified in Auckland GD05 provide an effective soluiton for controling and treating stormwater runoff from construction sites.
The pond’s sizing, length-to-width ration, and depth ensure that suspended solids settle out, while the flaoting decant system helps discharge cleaner water. By adhering to these specifications construction projects can effectively manage sediment, protect the enviroment, and comply with local regulations.
Dose Injection Systems (DoseBox)
A chemical injection system, such as a DoseBox, is an efficient solution for injecting treatment chemicals like polyaluminium chloride (PAC) into a pumped dirty water flow.
These systems automate the dosing process, improving the sedimentation and treatment of turbid water. Notably, the DoseBox can be solar-powered and operated using either a flow switch or flow meter, making it both versatile and sustainable for remote or off-grid locations.
The DoseBox is often used in conjunction with other sediment devices such as lamellas and sediment containers which help separate and contain sediment.
FlocBox
Erosion Control’s FlocBox is expertly engineered to replicate the principles of the GD05 rainfall-activated shed, providing a reliable and effective solution for chemically dosing sediment retention ponds.
This innovative system is designed to enhance water clarity and manage sediment, making it an essential tool for construction sites, industrial facilities, and other projects where runoff control is crucial.
Monitoring Construction Water Discharge Systems
In the construction and development industry, effective sediment management is crucial for regulatory compliance and environmental sustainability. With our expert support team doing the monitoring and servicing of you sediment control devices you can focus on your project’s other demands.
Our expert Monitoring and Service Maintenance Service ensures your construction and development sites operate efficiently while meeting GD05 requirements. From routine inspections and water quality testing to system maintenance and emergency response, our team provides comprehensive support to keep your sediment control systems performing at their best.
Why choose
Erosion Control?
We believe we are your best choice for environmental contracting services in the North Island. We offer decades of experience, a range of effective solutions, and a track record of 100% compliance. Our “do it right the first time” philosophy means you get a reliable, professional team working with you.
Providing Creative Solutions
Time and again, we’ve witnessed this fact: Doing the right thing for the environment is the most cost-effective solution in the long run. Known for our consultative approach, we’ll team with project managers early in the planning stages to identify green solutions that meet your project and budget requirements.
Ensuring 100% Compliance
Throughout the design, installation, and maintenance phases, we bring an advanced level of expertise and regulatory knowledge to our clients’ projects. Starting with the planning process, our clients rely on our guidance and expertise throughout the entire construction process.
Offering best-management practices
We implement tried-and-true best-management practices, plus we’re on the forefront of the latest advances. Our clients appreciate that we take time to talk with them, educate them, and help them determine whether new approaches, procedures, or leading-edge technology may suit their site’s needs.
CONTACT US
VISIT AUCKLAND
171 Postman Road
Dairy Flat
Auckland 0794
VISIT HAMILTON
175E Ellis Street
Frankton
Hamilton 3204
HOURS
MON - FRI
7:00AM - 4:00PM
Phone
0800 787 2966
POSTAL
PO Box 130
Silverdale
Auckland