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GES <br /> GENESIS ENGINEERING&REDEVELOPMENT <br /> 1.0 INTRODUCTION <br /> This Groundwater Extraction Work Plan ("Work Plan")was developed for the R.F. Land, <br /> Inc. facility located at 932-938 Frontage Road in Ripon, California("Site") (Figures 1 and <br /> 2).. The Work Plan details a proposed plan to extract groundwater beneath the Site and <br /> discharge the water to the City of Ripon Non-Potable Water System ("NPWS"). <br /> 1.1 Site Background <br /> The Site was used for bulk batching and distribution of nitrogen-based fertilizers. The Site <br /> had a wash-rack containment area with two concrete holding ponds, storage buildings, and a <br /> bulk fertilizer preparation area. All fertilizer batching activities at the Site ceased in <br /> November 2008 and the Site is currently inactive. All structures in the former batching areas <br /> of the Site and surface asphalt have been removed. <br /> The Site is located in a mixed industrial/commercial area on the northwest side of Ripon and <br /> is bounded by Highway 99 to the southwest; a truck stop with a truck wash to the north; and <br /> agricultural and commercial uses to the south and east,respectively. The Site and <br /> surrounding areas have been developed with predominantly industrial and agricultural uses <br /> from the 1950s to the present. <br /> 1.1.1 EHC-Carbon Only Injection Pilot Study <br /> A Treatability Study was performed in 2012 and 2013 in which EHC-Carbon Only <br /> ("amendment") was injected into the groundwater to evaluate whether the amendment would <br /> be effective in reducing nitrate concentrations in shallow groundwater(GE&R 2014). After <br /> injecting the amendment in December 2012 and monitoring the effects on groundwater for <br /> approximately one year, the Treatability Study was completed. GE&R(2013) concluded that <br /> while the amendment appeared effective in reducing nitrate concentrations, its distribution in <br /> the treatment zone was uneven. After additional monitoring, GE&R 2014 concluded that the <br /> amendment was not successful in decreasing groundwater nitrate concentrations at the Site <br /> beyond the discrete zones into which the amendment was injected. Full scale <br /> implementation of the injection of EHC®-Carbon Only amendment was not recommended. <br /> 1.2 Local Geology and Hydrogeology <br /> The United States Geological Survey topographic map, 1991 Manteca, places the Site at <br /> about 58 feet above mean sea level. Topography at the Site is relatively flat. The Stanislaus <br /> River is located approximately 1.75 miles southeast of the Site and flows in a southwesterly <br /> direction. <br /> RF.Land Inc. 1 Of 11 <br /> Groundwater Extraction Work Plan <br /> October 2014 <br />