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Kennedy/Jenks Consultants <br /> 2.3.3 Onsite Investigation <br /> Currently, only two onsite CPT/HydropunchTM locations are planned (CPT14 and CPT15). <br /> Groundwater quality samples from these locations can supplement existing groundwater <br /> monitoring data and help to assess whether additional monitoring wells are needed for long- <br /> term monitoring and evaluation. <br /> 2.4 Task 4 - Installation and Development of Monitoring Wells <br /> Additional monitoring wells may be constructed, based on the findings of the <br /> CPT/HydropunchTM program. Monitoring well installation subtasks are detailed as follows. <br /> 2.4.1 Pre-Field Activities <br /> Kennedy/Jenks will perform the following pre-field activities prior to commencing fieldwork at the <br /> Facility. <br /> 1. Prepare a site-specific Health and Safety Plan. <br /> 2. Obtain well installation permits from the San Joaquin County. <br /> 3. Survey the proposed boring locations for potential location conflicts with subsurface <br /> utilities by performing a utility clearance check prior to drilling. The survey will be done <br /> by contacting USA Alert for utility clearance two working days before the scheduled <br /> fieldwork. In addition, a private subsurface utility locating service will perform a search <br /> for underground utilities at the proposed drilling locations. <br /> 4. Contract with a C-57 licensed drilling contractor to perform field work. <br /> 5. Select a state-certified laboratory to conduct laboratory analytical services. <br /> 2.4.2 Drilling, Groundwater Monitoring Well Installation and Well <br /> Development <br /> Following execution of the pre-field activities, Kennedy/Jenks will oversee the licensed drilling <br /> subcontractor to advance subsurface boring(s) for the proposed monitoring wells at the Facility. <br /> The boring for each well will be drilled using a hollow-stem auger drilling rig. Soil will be <br /> continuously cored and logged under supervision of a California Professional Geologist. Based <br /> on our previous experience at the Facility, we anticipate that borings to be drilled to a total depth <br /> of 70 feet bgs, with a 15-foot long well screen. <br /> The boreholes will be converted into completed groundwater monitoring wells in accordance <br /> with the Kennedy/Jenks' SOG for Well Construction and Development(Appendix A). The <br /> monitoring wells will be constructed with 4-inch diameter Schedule 40 polyvinyl chloride (PVC) <br /> casing. For the screened interval, 0.010-inch slots or other appropriate slot size for the <br /> lithologies encountered will be selected based upon the lithologic logs from the soil borings. The <br /> remainder of each well above the.screened section will consist of flush-threaded, 4-inch <br /> diameter, Schedule 40 PVC blank casing. A continuous filter pack will be placed in the annular <br /> space between the screened section and the wall of the boring. The filter pack will consist of <br /> Groundwater Investigation Work Plan Page 15 <br /> Barrel Ten Quarter Circle Winery, Escalon, California <br /> g:Gs-groupladminGob1031030118.08_barrelten\Cg-reportslgw invest wrk pinitexldoc <br />