Water Well Standards, San Joaquin County

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Excerpt from Water Well Standards, San Joaquin County: Appendix E Formation TestingIn well 18/6e-3ml the formation tests showed that the top formation, at the 118-120 perforated interval, had poorer quality water than the bottom formation, located at the 165-166 perforated interval. The difference is 260 ppm Cl. The poorer quality water from the top formation apparently intruded the bottom formation and displaced some of its native water, thus creating a Zone of Foreign water of inferior quality. The movement of the upper formation water into the lower formation is caused by a difference in formation head between the two aquifers (in an area of free or semi-confined ground waters the head of the better quality aquifers tends to be lower than the head of the poorer quality aquifers because intensive pumping from.wells located in the good quality water-bearing formations results ina greater draft on the better water). The quality of water obtainable from this well could be improved by sealing the 118-120 perforated interval.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.