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Re-Revised Groundwater Monitoring Well Construction <br /> Workplan <br /> August2023 <br /> Vertical Gradient <br /> Figure 7 provides a graphic representation of the vertical groundwater gradients (heads)between <br /> the Upper and Lower aquifers in Fall 2019,just after high groundwater use in the summer <br /> months, when the difference in groundwater levels are typically the greatest. There is a <br /> downward head between the Upper and Lower aquifers at the drill site. <br /> lLk,t~b Tr.��l <br /> � .'•rr�rok..I <br /> txr Head Direction <br /> V down(greaterthan 0.9) <br /> 9iT,r + r, No Change(less than+f-0.3) <br /> y T4-I Ir.�,l r•rlo j up(greater than 0.5') <br /> Unknown(M onitoring Wells not <br /> 1AU.,n.ii ' present in Upper and Lower <br /> Acluife rs to allow comparison) <br /> I o <br /> I _County Boundary <br /> ;4 „I <br /> 0 Tracy Subbasin <br /> _ <br /> — r I.I. n <br /> ' M1� <br /> I <br /> n� T. <br /> 01 H 0SE32EOM iN <br /> f'r11^,r �,4i„,I �y 01N0dE3951306M � '7. f• <br /> co¢rr Furebay <br /> - r,krg Cr <br /> 015M6 .063M <br /> M1 SO4E29F0U3M <br /> 01 ¢ 15O4E28P002M 4' M1 8E25KMM1M <br /> `-�01506E34R01]i M <br /> E28FOOlM S Lid.ntal Wells <br /> DI M1 505E3.1 o hialslEc� <br /> 02503E • . 4 <br /> olsoaE3lPo <br /> �02503E01D iM 625M5EMl3BMU1 <br /> — <br /> I MW-'6h <br /> M W-0c <br /> 02SO4E15R001 " -' 025M5 1 1 <br /> POW-1A MW-5�43 LdW :s <br /> MW=1B MW=51ik � OYMM27E001 <br /> t4 MW-5} <br /> M W-0A � =I <br /> MW-2A+ ` 03'506-E 7002 P <br /> MW-3A* MW-3C <br /> i M3SOCE05 001M R <br /> n <br /> carrarMW£ Crral MW-203 <br /> � CarralMW-7 63506E23G041 � <br /> ¢ corral M <br /> S E26 iM 113508E FZM - , <br /> aq In <br /> �y�.r,_J�r � r -�� f 35MfiE28N041 <br /> G jO� N <br /> 0 _ B 92 N v o$ 5 <br /> / r7 <br /> Figure 7: Vertical Gradients Between Upper and Lower Aquifers <br /> GEI Consultants, Inc. 14 <br />