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Groundwater Monitoring Well Construction Workplan <br /> February 2024 <br /> -41 14-inch dia.steel security vault <br /> iiiii <br /> 0— A B C ❑ . <br /> Neat Cement(Sanitary Sea]) <br /> 20— 16-inch dia.borehole <br /> USGS Corcoran Clay(p-Clay) ' 'J�• ='j <br /> (approximate thickness) 6entonite Clay Seal(Chip,) <br /> �•,;�;' _140— <br /> 2-5-inch dia.SCH 80 PVC well casing <br /> �0— 260— <br /> 2fi0— — <br /> Filter pack <br /> 2-5-inch dia.SCH 8o PVC well—en(0.030 slot) <br /> 290— 2.5•inch dia.SCH 50 PVC well casing and cap <br /> 285— <br /> 295— 2.5-inch dia.SCH S0 PVCwell casing <br /> Ben to n ite Cl ay Seal(Ch ips) <br /> 430- <br /> 440— <br /> Pi her pack <br /> Win I 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 /> 6entonite Clay Seal(Chips) <br /> 530— <br /> Filter pack <br /> 540— <br /> _ rch <br /> 23-inch dia.5CH 80 PVC well screen(0.630 slot) <br /> 12-inch dia.borehole <br /> NDte$: 565— dia.SCH BC PVC well casing and cap <br /> Final Design will be based upon 590 <br /> the geophysical log. 8-inch dia.borehole <br /> Final Design to be approved by <br /> EHD prior before construction, Untonito Clay seal(chips or Pei ets) <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. 2.5-inch dia.SCH 80 PVC well screen(0.030 slot) <br /> Base of freshwater approxi- $oo— <br /> mately 800 feet bgs 805— 25-inch dia.SCH 80 PVC well casing and cap <br /> 815 Fenton ke Clay Sea (Pellets) <br /> NOTE NOT TO SCALE •'.?,�-.i_` <br /> 850— <br /> Well Construction Typical Nested Monitoring Well <br /> Tracy Subbasin Construction Details <br /> F For MW-202 <br /> Tracy Subbasin EI I August 2023 <br /> Figure 10: Typical Nested MW-202 Monitoring Well Construction Details <br /> GEI Consultants, Inc. 20 <br />