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� 11 Kennedy/Jenks Consultants J Section 4: Field Activities, 4.1 Pre-Field Activities IT Kennedy/Jenks will perform the following activities prior to commencing fieldwork at the Site. • Prepare a site-specific Hazard Appraisal and Recognition Plan (attached as Appendix A). � • Obtain well installation permits from San Joaquin County. • Survey the proposed boring locations to identify subsurface utilities by performing a utility clearance check prior to drilling. Kennedy/Jenks will contact Underground Service Alert for utility clearance at least two working days before the scheduled fieldwork. In addition, a private subsurface utility locating service will be retained to perform a search for it underground utilities at the proposed drilling locations. • Contract with a C-57 licensed drilling contractor to perform the fieldwork. iT • Select a state-certified laboratory to analyze the collected samples. ._ i 4.2 Groundwater Monitoring Well Installation and Well Development --A]- Following completion of the pre-field activities, Kennedy/Jenks will oversee the licensed drilling subcontractor during drilling of the subsurface borings for the proposed monitoring wells at the Site. The boring for each well will be drilled using a hollow-stem auger drilling rig. Soil will be continuously cored using a CME or equivalent system, or continuously cored using a drive sampler. The soils will be logged under the supervision of a California Professional Geologist. t Based on a review of available data, the anticipated boring depth is no more than 20 feet bgs for Wells GW-19, GW-20, GW-21 and GW-22. All four monitoring wells will be completed with 10-foot long well screens. In the vicinity of Well GW-22, a soil boring will be advanced to a depth of approximately 50 feet to allow lithologic logging, after which the boring will be filled with neat cement grout to a depth of approximately 5 feet. z 4.2.1 Well Construction ' The boreholes will be converted into completed groundwater monitoring wells in accordance with Kennedy/Jenks' Standard Operating Guideline (SOG) for Well Construction and Development (Appendix B). The boreholes will be 8 inches in diameter and the monitoring wells will be constructed of 2-inch diameter Schedule 40 polyvinyl chloride (PVC) casing. The screened interval will consist of 10 feet of 0.010-inch slotted casing, or other slot size appropriate for the lithologies encountered based on the lithologic logs from the soil borings, •j with a threaded end cap. Above the screened section, each well will consist of flush-threaded, 2-inch diameter, Schedule 40 PVC blank casing. A continuous filter pack will be placed in the _ annular space between the screened section and the wall of the boring. The filter pack will consist of washed packaged sand sized accordingly for the well screen slot size selected (Lonestar#2112 or equivalent for 0.010-inch slots). The filter pack will extend upwards from the _ Page 10 Monitoring Well Installation Work Plan Sutter Home Winery, Lodi, California p 0- -Pla *WOOBM5.1)sdWha Wg+epMSY iMfu"Va4U �r