Water Well Rehabilitation and Reconstruction (ISBN 0071486518)

Great overview:
I work at a large waterworkfacility in Denmark. In Denmark drinkingwater is produced solely from groundwater extracted from deep wells (range from 30 -150 meters below surface). We encounter encrustations,clogging or other difficulties. Using a videocamera downhole we can actually see some of the problems. We therefore need to mobilize efforts to rehabilitate the borehole. This book gives a great view of different technics, what works and methods to document that there has been an improvement. One extra bennefit in this book is the chapter on the economic issues involved. When and how much to implement compared to drill a new hole. Based on many real investigations on data from a large amount of German and US boreholes this gives a thorough base on which you can base a strategy on your own boreholes. It is clear that in making a borhole, you should already from the beginning be aware that you have to recharge and rehabilitate a new borehole more thoroghly than is common practice, at least in Denmark. So putting some effort in cleaning a well from the start and at regular interval inspect and remidiate problems early you can make a well last much longer and be economical in the daily expenses in operation. Great book with good data and illustrations. Great value for money.