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Preliminary report on the groundwater isotope study in the Brentwood Region

机译：布伦特伍德地区地下水同位素研究初报

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Under contract with the City of Brentwood and auxiliary support by the East Contra Costa Irrigation District (ECCID), a preliminary research assessment of the groundwater resources beneath the Brentwood region is complete. The research was performed by an isotope geochemistry approach rather than traditional hydrogeological methods. The isotope approach has been used here mostly as a tracer that details the source, migration paths, and migration rates of existing groundwater supplies. In addition, the isotope results provide a quantitative framework in which to answer questions important to Brentwood including: (1) What is the long-term and short-term sustainability of the groundwater resources relative to current urban growth projections; (2) How can the good water quality be maximized in groundwater wells under short and long-term groundwater use schemes; and (3) What underground areas exist within the Brentwood region that indicate untapped groundwater supplies that may provide plentiful, good quality water. This preliminary report focuses only on the first question. The second and third questions will be addressed in the final report to be completed by January 1, 1995.

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