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Offsite Well Survey Report
Section 5 - Summary
The scope of this survey was to identify and locate groundwater wells within �-mile of the CSSA facility boundary. These wells were identified as subset of data provided by a geographic information service that canvassed the two state agencies databases for potential targets within one-mile of CSSA. From that database and a subsequent windshield survey, a total of 162 potential well locations have been identified within one mile of CSSA. From that survey, a set of key well locations that included all wells within �-mile of CSSA plus key groundwater users in the vicinity were developed as the basis for this report.
Twenty-one of these locations exist within the CSSA facility, of which seven are plugged and abandoned. Research records for an additional 45 wells were located for private, government, and publicly-held wells within a �-mile radius of CSSA. Eight of these are government-owned wells (Camp Bullis) that are reported to have been plugged, unlocated, or are inactive. That leaves 37 domestic or municipal wells that are currently active around the �-mile periphery of CSSA.
Outside the �-mile area, an additional 56 wells were identified during the public records search that were considered relevant to this study. While these wells are identified in the tables and figures of this report, they are not fully documented in the supporting appendices due to scope constraints. These wells are primarily domestic wells located within the Jackson Woods subdivision, or municipal wells associated with the Fair Oaks water supply. In addition to the Bexar Met MUD, the Jackson Woods and Fair Oaks developments are the largest groundwater users outside of the government-owned lands. Another development to the southeast of CSSA, The Dominion, is also another large consumer of groundwater resources in the vicinity but was not considered since it is outside the one-mile extended survey area.
In the survey area, nearly all wells draw from either the Lower Glen Rose and Cow Creek formational members of the Middle Trinity Aquifer. Many wells are completed across both water-bearing units to maximize their yield. Locally, the Bexar Shale (or the Hensell Sand facies counterpart) does not contribute significant quantities of groundwater to the well bore. In the past, cross-connections between the Lower Glen Rose and the Cow Creek has not been a concern of the general groundwater user since the Bexar Shale has a low collapse potential. The water quality from the Middle Trinity Aquifer is good, but is rather hard from carbonate rock mineralization.