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<br /> -3- <br />3. i~a ter Table ~1a p <br /> The water levels in wells around San Marcos will be measured to better <br /> define the flow paths of ground water to the springs. The water level in <br /> ten wells I'd 11 be monitored and compared to past measurements to determine <br /> the effect of the drought on 1oca1 water tab1e conditions. <br />4. Location Map of Sinkholes, Caves, and Other Recharge Points. <br /> A detailed field investigation will be made to locate the position <br /> of sinkholes, caves, open fractures, and minor and major stream pathways <br /> that may act as recharge points. <br />5. Thickness Map of Edwards Aquifer Cover <br /> Using drillers' well logs and geologic information, a map will be made <br /> showing the general thickness of rocks overlying the Edwards Aquifer. <br />6. Geology Map <br /> A map combining the existing geologic information will be compiled and drawn <br /> at a scale to match the other proposed maps. <br />7. Map of First-Order Basins for the Purgatory and Sink Creek Basins. <br /> A map outlining the drainage area of the first-order basins feeding into <br /> Purgatory and Sink Creek basins will be made from topographic maps to show <br /> avenues of storm water runoff that gink in enviromentally sensitive areas <br /> around San Marcos. <br />Sur~~~ARY <br /> G~owth is an important asset to the development and betterment of a city. <br />But; San Marcos is underlain and surrounded by cavernous limestones that are <br />very susceptible to groundwater contamination and this requires extra protection. <br />To ensure the integrity of San Marcos'water supply, it is essential that <br />planning be done now. By producing the series of overlaying maps suggested <br />in this proposal, better decision making can be made to guarantee the good water <br />qua1ity of our w~11s and springs for years to come. <br />