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5.15 WATER RESOURCES <br /> • Maps and cross sections of underground sources of drinking water and geologic <br /> structure of area <br /> • Operating data <br /> • Formation testing program <br /> • Stimulation program <br /> • Injection procedures <br /> • Construction procedures and details <br /> • Plans for well failures <br /> • Monitoring program <br /> • Plugging and abandonment plan,including proof of necessary resources <br /> • Aquifer exemption <br /> • Existing EPA permits <br /> • Description of business <br /> 5.15.2.2.4 Groundwater <br /> The LEC project will use potable water from a new onsite well for eye-wash stations and <br /> sanitary facilities,as needed. This well will be permitted through the San Joaquin <br /> Department of Environmental Health, as required by the City of Lodi Municipal Code, <br /> Chapter 8.08. <br /> The onsite well will draw from the Eastern San Joaquin Subbasin within the highly <br /> productive San Joaquin Valley Groundwater Basin. Well yields in the fresh water-bearing <br /> formation underlying the subbasin range from approximately 650 to 1,500 gallons per <br /> minute (DWR,2006). The onsite well will have sufficient capacity to supply 450 gallons per <br /> day of potable water necessary for the LEC (approximately 450 gallons per day,Monday- <br /> Friday,and 90 gallons per day on Saturday and Sunday). The overall volume of potable <br /> water to be used by the LEC is less than 0.4 acre-feet per year with a maximum pumping <br /> rate of less than 1 gallon per minute. All pumped water will be consumptively used and no <br /> groundwater return flows are expected. <br /> There are two aquifers in the LEC project area. The upper aquifer is perched on top of an <br /> impervious zone and is found at depths of 2 to 14 feet (Lowney-Kaldveer Associates,1975). <br /> The lower aquifer begins at a depth of about 50 feet and is of a higher water quality than the <br /> upper aquifer. For the LEC project,the onsite well will be screened several hundred feet <br /> below the known area of low-quality shallow groundwater. The target aquifer is the Laguna <br /> Formation,which has average irrigation well yields of 900 gallons per minute in the Eastern <br /> San Joaquin Subbasin(DWR,2006).The well will be screened at a sufficient depth to be <br /> unaffected by the existing shallow low-quality groundwater. Additional measures to protect <br /> the water quality of the well include: <br /> • 75 feet of cemented surface casing will be installed. <br /> SAC1371322/082340005(LEC_5.15_WATER_RESOURCES.DOC) 5.15-21 <br />