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21 June 2019 AdvancedGeo <br /> AGE Project No. 19-4745 Environmental <br /> Page 9 of 14 <br /> described as somewhat poorly drained. Clays and loams in Jacktone-Urban complex <br /> typically have the same chemical properties between surface grade and 60 inches bsg. <br /> 7.2. MASS TRANSPORT PROPERTIES OF UNDERLYING SITE SOILS <br /> This shallow somewhat poorly drained rich soil has a high available water-holding <br /> capacity. The existing septic system contains four, 25-foot deep seepage pits installed <br /> along and at the ends of the leach field lines. The natural fertility of this soil lends it very <br /> well to sustainable farming practices. Permeability is slow and available water capacity is <br /> high. <br /> 8.0. GROUNDWATER ANALYSIS <br /> The property is supplied with potable water by the California Water Service Company., <br /> The water supply was not sampled as part of this study. <br /> 8.1. DESCRIPTION OF LOCAL GROUNDWATER <br /> The San Joaquin County Flood Control and Water Conservation District's Lines of Equal <br /> Depth to Groundwater Fall 2018 indicates the depth to groundwater in the vicinity of the <br /> site is approximately 40 feet bsg. Groundwater flow direction locally appears to be <br /> northeast to southeast. <br /> 8.2. EXISTING OR POTENTIAL GROUNDWATER CONTAMINATION <br /> The immediately adjacent and outlying land use for the parcel is commercial, agricultural <br /> and residential. A review of the California DTSC EnviroStor Database and the Geotracker <br /> Web site revealed several closed LUST sites within a half-mile radius of the site. One <br /> spills, leaks, investigation and cleanup (SLIC) site (Marley Cooling Tower Company) is <br /> located 0.75-miles from the site. The SLIC site is currently open and in the process of <br /> remediating chromium and hexavalent chromium in groundwater. Based on the <br /> information reviewed, there is no existing or known groundwater contamination at the site <br /> and the potential for groundwater contamination is de minimis. <br /> 8.3. CURRENT AND FUTURE USE OF GROUNDWATER AT THE SITE <br /> There are no immediate plans to use groundwater at the site. Potable water is currently <br /> supplied to the site by the California Water Service Company. <br />