Step 3 - Determining the yield of the borehole /Test pumping. The accurate yield of a borehole can only be determined by means of an aquifer test. This test involves installing a test pump and pumping the borehole for a period of time at a given rate, while recording the lowering of water level in the borehole. The maximum yield of a borehole is achieved by increasing the abstraction rate to a yield, resulting in the maximum drawdown of water in the pumping borehole.
Step 4 - Potable water test/Lab analyses A water sample is taken at the end of the aquifer testing for delivery to a credible laboratory. This will give you a breakdown of the chemical and bacterial parameters within the water, from this any additional water treatment equipment, if necessary can be recommended
Step 5 - Reports Submission Once construction is complete, the driller will issue a Borehole Completion Report with the Test Pumping Record and Water Quality Analysis. Then further application is made to WRMA to transform the Groundwater Authorisation into Groundwater Abstraction License (at a fee).The license is valid for 4 years.
- Groundwater Abstraction License
In accordance with the Groundwater Abstraction License, it is necessary to pay to WRMA Water Abstraction fees, due on a quarterly basis. This is according to scale of fees for that area and rate of abstraction, against the self-reading of the mandatory production water meter at the beginning / end of each quarter for self-assessment. Typically this figure is multiplied by say 0.5/-(50Cts), per unit (1000ltrs). These funds are to be paid into designated WRMA bank account against the license number with receipt filed and kept safely by the user for WRMA bailiff audit as/if required.
Step 6 - System Design/Sizing of Pump
We will design a complete system catering for all your needs based on the information provided along with the yield and water test results.
Step 7 - Installation of pump, water supply equipment and controls (may be delegated, depending on contract)
The final stage of borehole drilling requires the pumping and piping of water from the successful borehole. The end use of the water will largely determine the type of pumping and reticulation system that will be installed. With too many variations on the nature and type of pump installations to go into detail here, we discuss the most appropriate options with our client in person and are able to offer a 1-year warranty on the equipment installed into a fresh borehole.
Maintenance and risk assessments Once installed and commissioned your borehole system should provide many years of trouble free service, if maintained properly. As a minimum, annual checks should be made to the pumping equipment, pipe work and any treatment equipment. We would be happy to help in the production of your private water risk assessment if required. We offer a comprehensive service and maintenance scheme so you can be sure your borehole is operating efficiently.
This is the set-up of a typical borehole which is constructed in a place where the well head fittings are left above the ground.
There are set-ups that require that the well head fittings be below the ground; secured in a manhole.