Laserfiche WebLink
Table 1 <br />Proposed Groundwater Monitoring Well Construction Details <br />Forward Landfill, Stockton, California <br /> <br /> <br />Proposed <br />Monitoring or <br />Extraction Well(s) a <br />Borehole <br />Depth <br />(ft bgs) <br />Minimum <br />Borehole <br />Diameter <br />(inches) <br />Anticipated <br />Depth to <br />Water b <br />(ft btoc) <br />Well Depth c <br />(ft bgs) <br />Casing <br />Diameter <br />and Type c <br />(inches)Screen Lengths c (ft) <br />Screen Slot Size <br />(inches) <br />Screened Interval <br />Backfill Material and <br />Placement <br />Monitoring <br />Well Annular <br />Seal <br />Grout <br />Annular Seal Surface Completion c <br />AMW-XX or PZ-XX <br />(shallow and <br />intermediate <br />wells) d <br />up to 120 6 60 <br />shallow up to <br />90 ft bgs, <br />intermediate up <br />to 120 ft bgs <br />2-inch Sch. <br />40 polyvinyl <br />chloride <br />Up to 20 feet in <br />length <br />0.010 Sch. 40 <br />PVC <br />#2/12 silica sand <br />filled to > 3 ft over <br />top of each screen <br />5 ft 3/8 <br />hydrated <br />bentonite <br />chips / <br />Pellets <br />Portland <br />Cement with <br />up to 5% <br />bentonite <br />Stove-pipe well box with j-plug <br />on casing <br />EW-XX <br />(intermediate)up to 120 10 60 up to 120 ft bgs <br />6-inch Sch. <br />80 polyvinyl <br />chloride <br />1 screen targeting <br />intermediate water <br />bearing zone with <br />final length based <br />on PZ lithological <br />findings. <br />6-inch Stainless <br />Steel with slot <br />determined by <br />sieve data <br />Silica sand with <br />size determined by <br />well design, filled <br />to > 5 ft over top of <br />screen <br />5 ft 3/8 <br />hydrated <br />bentonite <br />chips / <br />Pellets <br />Neat <br />Portland <br />Cement <br />Surface casing left as required <br />to hook up to the remedial <br />system (likely initially PVC <br />pipe stickup to 2 ft with well <br />cap) <br />Notes: <br />a - Actual well nomenclature to be determined at a later date based on monitoring program. <br />b - The anticipated depth to groundwater is based on groundwater monitoring results from EW-1. <br />c - Exact well completion depth, screen length and design to be determined based on lithology at each well location. <br />d - At location PZ-3, only a single intermediate well is being installed, no shallow wells will be installed. <br />ft - feet <br />amsl - above mean sea level <br />bgs - below ground surface <br />PVC - polyvinyl chloride <br />CDCR Table and old Well Constructions <br />2/1/2023