19 MARCH
Two men in blue overalls sit at a control panel monitoring information in the form of digits and colours on a computer screen. They watch as sand is cleared from humus, rinsed, washed, vacuum-sucked, dried, transported and dumped in the right silo via the controllable loading point.. It is clean quartz sand that remains after this process. Antifoam agent is the only thing that is added along the way. That