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Groundwater Monitoring Well Construction Workplan <br /> February 2024 <br /> Vertical Gradient <br /> Figure 8 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. The closest <br /> monitoring well with head differences (MW-6A and-6C) show a downward head. <br /> }yppt,Tr.:l k. ,� <br /> t x;x,- rnll•�• Head UireCtLon <br /> V down(greaterthan 0.9) <br /> 9iT,r + r, No Change(less than+f-0.5) <br /> y T4-I I�r.�,l r•rlo j up(greater than 0.5') <br /> a rl-� <br /> T, . _s� _ � Unknown(M onitoring Wells not <br /> I,k U.,n-Al '�� � � present in Upper and Lower <br /> Acluife rs to allow comparison) <br /> l o <br /> I _County Boundary <br /> 0 Tracy Subbasin <br /> _ <br /> — r n <br /> TO op <br /> n� T. <br /> 01 H 0SE32E001 iN <br /> f'r11„r �.ri�,.l �1 01N0dE3951303M � s1� r. <br /> 1- 011~10IF 6QDMM S <br /> co¢rr Furebay <br /> - r,krg Cr <br /> r Di Sim 063M <br /> �:.•.- 1 504E29F0U3M <br /> i5O4E2EP002M <br /> 01 s 4' 01 fiQ5K0U1M <br /> `-�01506E34ROd i M <br /> MW-202 E28FOOlM 10 Lidental Wells <br /> r- ISNE20Pg03M ,pp 31505E3.1 0 <br /> 02S03E01D M hialstEc� <br /> 01s04Ea1P C¢505EUHB0U1, 4 <br /> � 2S i � <br /> t � � <br /> MW-202 Mw ` <br /> MW-fiC <br /> 02&04E15R001 02505 1 1 <br /> 0 MW-1A MW-5�13 LdW } <br /> MW-1B MW-5A OAOGE2TE001 <br /> {+&.15] f '' <br /> M W-0A � zi <br /> MW-2A+ ` 03'S06-E�0F 002 P <br /> MW-3A* MW-3C <br /> 29 <br /> i GDSOCE05 O01M R <br /> a Carrar MW-s Corral rul p' ant G�� <br /> O t h <br /> � s CarralMW-7 03506E23C041 � <br /> Corral M - {-0.G21F <br /> L03S05E2fi a01M 113 fi <br /> - n a�,rlln <br /> 35%EZBN001M <br /> 0 _ B 92 N v o$ 5 <br /> / r7 <br /> Figure 8: Vertical Gradients Between Upper and Lower Aquifers <br /> GEI Consultants, Inc. 16 <br />