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1 <br /> ' Dual-Nested Well Construction Diagram <br /> MW14A-B - MW16A-13 <br /> Traffic-rated well lid <br /> Ground Traffic-rated well box encased in concrete <br /> ' Surface <br /> (0.25 inches raised above surrounding surface) <br /> 2 . . Casing protrusion with locking cap <br /> 2' bgs ' <br /> k Well A <br /> 5' Borehole (12-inch 0) <br /> ' Annular seal (bentonite grout) <br /> Casing (Schedule 40 PVC, 2-inch 0) <br /> 7' bgs 'x <br /> ' 2' Transition seal (bentonite chips) <br /> 9' bgs ( <br /> ' 10' bgs 1 <br /> ' 20' Perforated well screen <br /> Historical First Zone •• (0.02-inch slots, 2-inch 0, Schedule 40 PVC) <br /> ' Groundwater Level — — -. <br /> (15'bgs-0412012) <br /> ' 30' bgs <br /> Well B <br /> 17Ile Filter pack (20/30 silica sand) <br /> ' 47 bgs <br /> 5 <br /> Annular seal (bentonite grout) <br /> 52' bgs Transition seal (bentonite chips) <br /> 2' <br /> ' 54' bgs Notes: <br /> 55' bgs 1. Diagram not to scale. <br /> 2. Well screen depth and length may be <br /> Historical Second Zone adjusted in the field based on lithologic <br /> Groundwater Level — --•: observation and depth of groundwater. <br /> (57'bgs-1212000) <br /> Figure 4: Groundwater Monitoring <br /> 5, Well Construction Diagram <br /> ' Rainwater Car Wash <br /> Bottom ca 420 West Yosemite Avenue <br /> p Manteca, California 95336 <br /> ' 70' bgs DRAWN BY'. DATE. PROJECT'. <br /> 0.5' GI Ma 2012 Elder. 01 <br /> 5' <br /> tAX Ami Adini <br /> `.W & Associates, Inc. <br />