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<br />these creeks in order to recharge the glOund,,,lter h...in "hieh tlnderliej the Planning ,\re". 'l1,ese <br /> <br />controlled water releases recharge the local groundwater basin underlying the Planning l\rea. <br /> <br />Groundwater recharge is a vital cOlnponcnt of natural resource production. 'nlC Arroyo dc ]a l...aguna, <br />Mld-Arroyo del Valle and paft of the Chain of Lakes act as groundwater recharge areas. The Land <br />Use Map designates the Chain of Lakes as Water Management and Recreation. partially due to <br />groundwater recharge functions. See additional discussion below. under Water !\[anagement and <br />Recrea tion. <br /> <br />'l1,e arroyos and flood-control channels provide linear nanrral areas that offer oppornll1ities for <br /> <br />incoq>orating trails and other recreational uses. Although development has reduced much of <br /> <br />Pleasanton's nanlfal habitat streams and streambeds provide natural habitat communities. including <br /> <br />freshwater marsh. central coast riparian scrub riparian woodland. alkali meadow. and valley sink scrub. <br /> <br />A special status wildlife species found in Planning Area streams is the California red-legged frog. The <br /> <br />Chain of I.akes and the San Antonio Reservoir provide additional surface water resources. Shadow <br /> <br />Cliffs Regional Recreation Area which is open to the public for active and passive recreation <br /> <br />incoq>orates a former g-ravel quarry as a lake." The San Antonio Reservoir. which provides water to <br /> <br />the Cir:y and Counr:y of San Francisco. is partially located in the Planning Area but is not open to the <br /> <br />public. The Chain of [.akes provides additional surface water resources that could be used for passive <br /> <br />- and. in the future. possibly active - recreation. as well as waterfowl habitat. <br /> <br />[moved hereJ The groundwater basin includes several aquifers "hieh .ne consisting of water-bearing <br /> <br /> <br />Vravel layers separated by impervious clay layers. The greate't amo"nt of groundwater i, fnund <br /> <br />Directly under flat portions of the Planning Area sits the greatest amount of usable groundwater in the <br /> <br />main water basin. Figure VII-2 shows the location of water resources in the Planning Area i.. ,ho"n in <br /> <br />Figtue Vlt 2., including surface water resources and the main vroundwater basin. <br /> <br />See the Public Facilities Element for discussion of water supply. water storage. and water distribution <br />along with related policies and programs. <br /> <br />Water Qualir:y <br /> <br /> <br />Both Zone 7 and the City of Pleasanton have in place extensive water-quality monitorinv programs <br /> <br />that they have continually updated and refined over the last decade. Neither avency has detected any <br /> <br />significant levels of volatile organic compounds or contaminants in the water supply. In addition. <br /> <br />Pleasanton's water qualir:y has complied with all federal and State drinking water-quality standards. <br /> <br />12 Active recreation refers to physical activities including, but not limited to, sports, g.lmes, dancing, exercising, and fishing. <br /> <br />Outdoor passive recreation refers to activities compatible with preserving natural and cultural resources, such as wildlife <br />habitat, arroyos, floodplains, and historic resources. Passive recreation includes - but is not limited to - the following <br />activities when they arc hannonious with the environment: walking, bicycling, horseback riding, nature and cultuml <br />resource study, photography, and picnicking, <br /> <br />Con os Elcrrn:nt, CC 01\2906, n,(llinl' <br /> <br />VII-to <br />