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Appendix I - Proposed Additional CDCR Extraction Well Construction Diagram <br />Well Installation and Interim Remedial Action Report <br />California Department of Corrections and Rehabilitation <br />Stockton, California <br /> <br /> <br />J-plug <br />Project CDCR Property Wells CDCR-EW-X <br />LAND SURFACE Town/City Stockton <br />County San Joaquin County State California <br />3 ft Permit No. TBD <br />Land-Surface Elevation and Datum: <br />Neat Portland cement up to 3 ft below surface ft Surveyed <br />or approved bentonite cement mix <br /> Estimated <br />Installation Date(s) TBD <br />Drilling Method TBD <br />Blank riser <br />6-inch diameter, Drilling Contractor TBD <br />Schedule 80 PVC <br />Remarks: <br />Borehole <br />Minimum 10-inch diameter <br />TBD ft <br />Hydrated bentonite chip seal <br />5 ft <br />TBD ft <br />Washed silica sand filter pack to match screen slot size <br />Centralizer <br />Screen 6-inch stainless-steel wire wrap, slot size determined <br /> by sieve data from pilot hole (anticipated as 0.02 slot and 20-40 ft in length) <br />Up to 130 ft total well depth (anticipated) <br />5-ft stainless-steel blank sump and end cap <br />DRAWING IS NOT TO SCALE <br />Notes: <br />CDCR = California Department of Corrections and Rehabilitation <br />ft = feet <br />2. Soil logged in accordance with ASTM designation D2488. PVC = polyvinyl chloride <br />3. Centralizers to be placed at bottom and top of screen and near surface. TBD = To be determined <br />4. Grout placed with tremie pipe and positive displacement. <br />5. Anticipated depth to water 60 ft below ground surface. <br />6. Well to be surveyed by licensed surveyor. <br />7. Plinth sloped to drain water away from well. <br />Final screen length based on pilot <br />hole lithological findings <br />1. Exact well completion depth, screen length, and placement to be <br />determined based on lithology at each well location. <br />Portland type 1/11 <br />cement 4-ft-wide plinth <br />5 ft <br />Surface casing left as <br />required to hook up to the <br />remedial system (likely <br />initially PVC pipe stick up <br />to 2 ft with well cap). <br />Page 1 of 1