GPS Mapping and Pond Topography
Using GPS tools with tolerances of +/- 1 cm, our highly trained team will clearly map the topography of solids accumulation on pond bottoms.
Measurement overlay on both aerial maps and as built drawings
3D imaging of solids
Identification of compromised liners
Use boats with electric motors to ensure contaminants aren’t introduced to the pond
Samples are collected during mapping
Our technical team has experience with mapping ponds in several industrial sectors including: Oil and Gas, Mining, Municipal Projects and Pulp and Paper.
Further to mapping of the pond, our team can create site diagrams for desired processing lay down area as requested.
Each project is unique and sampling needs vary. Generally, the flow through of the pond will dictate the sampling zones and subsequent number of samples required. Typically, the following samples are collected:
Discrete solids at pond inlet
Discrete solids at pond discharge
Composite of pond solids from center
Water samples for assessment of processing makeup water
All samples are labeled with the date and time as well as unique identifiers for the pond and location within the pond.
Samples can be provided to Client Environmental Team at no additional charge, upon request.
Bone Dry Tonnage (BDT) Determination:
There are several key factors that influence the total cost of a dredging and dewatering project. The total recoverable bone dry tonnage (BDT) of solids is the most significant. The more accurate this value is at the onset of the project, the more accurate development of the bidding process and budget.
Testing of the insitu solids material can realize an accurate (+/- 5%)* final estimation of BDT and subsequent calculations of recoverable solids by dredge.
Further testing may include:
Water quality: salinity, turbidity, hydrocarbon content, etc.
Solids: landfill packages, contaminants of concern, assessment for alternative disposal (coliform counts and toxicity)
Parent material: assessment of solids content along with typical flow rates allows for calculation of estimated lifespan prior to dredging or abandonment.
*Accuracy percentages are dependent on total volume of solids. In some cases, this number may be higher or lower.
Chemical requirements and associated costs can be assessed prior to project startup to facilitate assessment of the best recovery method.
Tighten budgetary numbers for trucking, stabilization and disposal by accurately defining the mass and volume of recoverable solids prior to project onset.
Accurate assessment of recoverable solids allows for better management of the project timeline by offering a calculable percentage of completion throughout the duration of the project.
Estimate Pond Lifetime
Estimate of pond lifetime prior to capping or when the pond will require dredging based on current sludge levels and characteristics of incoming material.