11. The U-tube is inserted into a vertical or horizontal borehole . 12. A borehole known as the Askam Borehole discharges directly into Nanticoke Creek. 13. A borehole known as the Askam Borehole discharges directly into Nanticoke Creek. 14. In practice the effect on borehole temperature is believed to be generally small. 15. Drilling began with test bores to assess the viability of a deep borehole . 16. Ngoma has a borehole so the water does not need boiling or purifying. 17. The borehole filling material solidifies around the containers to form a perfect seal. 18. The management of borehole data is very different from non-borehole data. 19. The management of borehole data is very different from non-borehole data. 20. A more modern method called bit in a borehole .