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14-inch dia.steel security vault <br /> 0— A B C D <br /> Neat Cement(Sanitary Seal) <br /> 20— 16-inch dia.borehole <br /> USGS Corcoran Clay(E-Clay) ,. ; , Bentonite Clay Seal(Chips) <br /> (approximate thickness) -_ l.'• <br /> 3 40— 2.5-inch dia.SCH 80 PVC well casing <br /> ��� — ♦ . <br /> r' <br /> 260— <br /> Filter pack <br /> 2.5-inch dia.SCH 80 PVC well screen(0.030 slot) <br /> 280— 2.5-inch dia.SCH 80 PVC well casing and cap <br /> 285— <br /> 295 ••_ 2.5-inch dia.SCH 80 PVC well casing <br /> � -�,.` ,'` Bentonite Clay Seal(Chips) <br /> 430— <br /> 440— <br /> = Filter pack <br /> 2.5-inch dia.SCH 80 PVC well screen(0.030 slot) <br /> 460— — <br /> 465— 2.5-inch dia.SCH 80 PVC well casing and cap <br /> 485— , <br /> •` . <br /> Bentonite Clay Seal(Chips) <br /> 530— <br /> Filter pack <br /> 540— - - <br /> 2.5-inch dia.SCH 80 PVC well screen(0.030 slot) <br /> 12-inch dia.borehole <br /> Notes: 560— 2.5-inch dia.SCH 80 PVC well casing and cap <br /> 565— <br /> Final Design will be based upon 580— <br /> the geophysical log. c'�. . <br /> '.•.` 8-inch dia.borehole <br /> Final Design to be approved by <br /> EHD prior before construction. < ' <br /> • . ,�. ' Bentonite Clay Seal(Chips or Pellets) <br /> Set of centralizers(3 per set)to be <br /> placed top and bottom of <br /> screens and between at 100 770— <br /> foot intervals with a minimum 780— —_ Filter pack <br /> of one mid-section of clay <br /> Intervals. r _ 2.5-inch dia.SCH 80 PVC well screen(0.030 slot) <br /> Base of freshwater approxi- 800— _ — <br /> 2.5-inch dia.SCH 80 PVC well casing and cap <br /> mately 800 feet bgs 805— _ <br /> NOTE:NOT TO SCALE 815— •:, ' '�, <br /> 850— -r' ` • f Bentonite Clay Seal(Pellets) <br /> Well Construction Typical Nested Monitoring Well <br /> Construction Details <br /> Tracy Subbasin ME <br /> F For MW-202 <br /> Tracy Subbasin G I Nc.—Ita°ts August 2023 <br />