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Kennedy/Jenks Consultants <br /> be compiled and reviewed to assess the ambient water quality conditions in the vicinity of the <br /> Facility. <br /> This task will also include additional site reconnaissance to more specifically evaluate potential <br /> locations for completion of CPTs. <br /> 2.2 Task 2 - Onsite and Off-site Groundwater Sampling <br /> Onsite and offsite water supply wells and other existing wells will be sampled to provide data on <br /> the lateral and vertical distribution of COCs. If accessible, existing offsite wells within a 1-mile <br /> radius of the Facility will be sampled to further characterize ambient groundwater quality in the <br /> vicinity of the Facility. <br /> Under this task, we will first canvas all existing agriculture and domestic water supply wells from <br /> records kept in the County and the DWR. Each well will be evaluated for its suitability for <br /> groundwater sampling. This data will augment onsite data and provide a reconnaissance level <br /> delineation of the spatial distribution of CDCs. <br /> 2.3 Task 3 - Proposed Cone Penetrometer and HydropunchTM <br /> Groundwater Investigations <br /> 2.3.1 Upgradient Investigation <br /> This task will facilitate investigation of upgradient ground water, primarily in the areas east of <br /> Facility. The focus of the proposed CPT/HydropunchTM locations (CPT1 through CPT4) will be <br /> on surveying the subsurface stratigraphy by interpretation of CPT data and sampling the <br /> groundwater for chemical analysis using a HydropunchTM or equivalent probe. Kennedy/Jenks <br /> believes that potential offsite source(s) located just east of monitoring wells MW-6 and MW-7 <br /> could have influenced groundwater quality beneath the LAA within the Facility. Three additional <br /> CPT locations (CPT11 through CPT13) are planned on an as-needed basis to assess <br /> upgradient groundwater conditions at further distances from the LAA onsite than provided by <br /> CPT 1 through 4. <br /> 2.3.2 Downgradient Investigation <br /> CPT locations CPT6 though CPT10 will be used to characterize groundwater conditions in the <br /> area downgradient of the Facility. Although CPT6 and CPT7 can be considered to be located <br /> hydraulically crossgradient, their results combined with results from CPT8, CPT9, and CPT10 <br /> will provide an aggregate picture of groundwater quality just west of the Facility. The locations of <br /> CPT9 and CPT10 will provide an assessment of downgradient water quality, in general <br /> comparison to downgradient well MW-5 conditions. These CPT locations are proposed at <br /> sufficient distances away from the LAA within the Facility, and can provide an important <br /> depiction of groundwater quality that may have been influenced by past or recent onsite land <br /> application treatment activities. <br /> Groundwater Investigation Work Plan Page 14 <br /> Barrel Ten Quarter Circle Winery, Escalon, California <br /> g:Vs-groupladminGob1031030118.08_barreltenl0Peportslgw invest wrk pinVeddoc <br />