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June 26, 2000 <br /> Mr. Tim O'Brien <br /> Central Valley Regional Water Quality Control Board <br /> 3443 Routier Road <br /> Sacramento, CA 95827-3003 <br /> MONITORING WELL INSTALLATION WORKPLAN <br /> EASTSIDE WINERY,LODI,SAN JOAQUIN CO. <br /> A. General Information <br /> Locations and Rationale <br /> Monitoring wells are being installed at this site to determine to what extent,if any, <br /> wastewater from the winery impacts groundwater. Wastewater from the winery proper is <br /> routed to a network of four contiguous excavated ponds(A 1 through A4) located next to <br /> the Mokelumne River. The ponds are managed to facilitate infiltration and all the water <br /> placed in them does, in fact, infiltrate. Occasionally, wastewater is also generated by a <br /> distillery at the winery site. The distillery wastewater,when it is generated, is routed to a <br /> different infiltration area. The distillery wastewater infiltration area (field B)is <br /> surrounded by a low berm and is situated within a meander of the river. The infiltration <br /> ponds and field are shown on Figure 1. The"A" series ponds are excavated and are <br /> capable of holding about 10 feet of water. Infiltration area`B"is not excavated and the <br /> surrounding berm is only about 1 foot above grade. <br /> The groundwater table at the site is under the influence of the river. During the site visit <br /> in May,the bottom of pond A4 was below the water table. Later in the dry season all of <br /> the ponds can be entered with machinery. The expected relationship between the river <br /> and the water table is that the river,which always flows, maintains a water table sloping <br /> away from the river toward the south or southwest. <br /> On the basis of that conceptual model of the groundwater system it is proposed to place <br /> two monitoring wells,one at the southwest corner of each infiltration area. The proposed <br /> locations of these two monitoring wells are shown on Figure 1. <br /> Survey details <br /> The site is situated in T4N,R7E, southeast quarter section of Section 31. <br /> The site is on the floodplain of the Mokelumne River. It is level at an elevation of about <br /> 10 feet(MSL). <br />