FIELD DOCUMENTS - Laserfiche WebLink

Home Browse Search

Kennedy/Jenl<s Consultants Section 4: Field Activities 4.1 Pre-Field Activities Kennedy/Jenks will perform the following activities prior to commencing fieldwork. • Prepare a site-specific Hazard Appraisal and Recognition Plan (attached as Appendix A). • Obtain well installation permits from San Joaquin County. • Perform a utility clearance check at the proposed boring locations to identify subsurface utilities 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 underground utilities at the proposed drilling locations. • Contract with a C-57 licensed drilling contractor to perform the fieldwork. • Select a state-certified laboratory to analyze the collected samples. 4.2 Groundwater Monitoring Well Installation and Well Development 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. 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 supervision of a California Professional Geologist. Based on a review of available data, the anticipated boring depth is no more than 20 feet bgs and the wells will be completed with a 10-foot long well screen. 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, 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#2/12 or equivalent for 0.010-inch slots). The filter pack will extend upwards from the bottom of the boring to one to two feet above the screened section. The wells will be pre-developed after the filter pack is installed, and prior to the bentonite seal being installed. A Hydrogeologic Investigation and Groundwater Sampling and Analysis Work Plan, Page 13 Sutter Home Lodi Winery, Lodi, California g.,I-roupwmnljobMOB6M.06_sft0mi O90 epa kwer�sll Oyka work plan"xtC