Laserfiche WebLink
` Kennedy/Jenks Consultants <br /> Following execution of the pre-field activities, Kennedy/Jenks will oversee the licensed drilling <br /> subcontractor to advance subsurface borings for the proposed monitoring wells at the Facility. <br /> 3.3.2 Installation and Development of Monitoring Wells <br /> ` The boreholes will be converted into completed groundwater monitoring wells and the wells will <br /> be installed by a licensed drilling contractor in accordance with the Kennedy/Jenks' SOG for <br /> Well Construction and Development found in the SAP (Appendix C). The design of the two <br /> proposed monitoring wells will be similar in design to the existing monitoring wells. The <br /> monitoring wells will be constructed with 2-inch (or 4-inch) diameter Schedule 40 polyvinyl <br /> chloride (PVC) casing. For the screened interval, 0.020-inch slots or other appropriate slot size <br /> for the lithologies encountered will be selected based upon the lithologic logs from the soil <br /> borings. The remainder of each well above the screened section will consist of flush-threaded, <br /> 2-inch (or 4-inch) diameter, Schedule 40 PVC blank casing. A continuous filter pack will be <br /> placed in the annular space between the screened section and the wall of the boring. The filter <br /> pack will consist of washed packaged sand sized accordingly for the well screen slot size <br /> selected (Lonestar#3 or equivalent for 0.020-inch slots). The filter pack will extend upwards <br /> from the bottom of the boring to one to two feet above the screened section. All wells will be <br /> pre-developed after the filter pack is installed, and prior to the bentonite seal being installed. A <br /> two- to five-foot layer of protective bentonite clay pellets will be placed to minimize downward <br /> migration of the grout seal into the filter pack. A cement/bentonite grout will be placed so as to <br /> extend continuously from the top of the bentonite pellet layer to less than one foot below grade. <br /> It is anticipated that this grout seal will be extended to an approximate depth of 35 feet bgs. In <br /> accordance with local regulations, a San Joaquin County representative will be onsite to <br /> " observe the grouting. <br /> A locking expansion cap and well-housing enclosure will be installed to control access to the <br /> well opening.Wells located in unpaved areas near the land application zones will be completed <br /> above grade and furnished with a protective, locking steel casing. Wells located in paved or <br /> trafficked areas will be completed with a traffic-rated monument. Each well will be completed <br /> 1 to 2 inches above grade and furnished with a sloping concrete apron to facilitate surface <br /> drainage away from the well. A schematic diagram of well construction details is shown on <br /> Figure 15. <br /> After waiting a minimum of 48 hours to allow curing of the grout and concrete, the monitoring <br /> wells will be developed by surging and pumping until the water removed from the wells is <br /> sediment-free or until no further improvement in water quality is observed. The wells will be <br /> allowed to recover for a minimum of 72 hours following well development, prior to monitoring <br /> and sampling. <br /> The locations and well casing elevations of these new monitoring wells will be horizontally and <br /> vertically surveyed by a licensed land surveyor. The ground surface and top of well casing <br /> elevation will be surveyed to the nearest 0.01 foot relative to mean sea level. The ground <br /> surface and casing will be surveyed to the National Geodetic Vertical Datum (NGVD 1983), <br /> relative to nearest benchmark at the Facility. Horizontal locations of the new wells will also be <br /> surveyed relative to the California Coordinate system to 0.1 foot. <br /> Groundwater Protection Work Plan, The Wine Group Page 3-4 <br /> Franzia Winery, Ripon, California <br /> �]� rC 1 .1 avire9rxipN9rep�rrrx4yianlfinalreaLf� <br />