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Client: City of Lathrop Lat/Lon 37.787102/-121.314715 Luhdorff
<br /> Well Name: Stewart MW-2 GSE ft-msl TBD
<br /> LSCE#: 22-2-173 Drill Date: 7/20/2023 - 7/27/2023 Scalmanini
<br /> Location: Lathrop, CA I Drilling Method: Direct Rotary
<br /> 6 Consulting Engineers
<br /> Geolo ist: R. Sanchez GIT Driller: Bradley& Sons Drilling
<br /> y y 16"ohm.m SP mV
<br /> s 0 30 -75 25
<br /> Strat-
<br /> s Lithologic Description Column t 64"ohm.m SPT ohms Preliminary Well Profile
<br /> a a 0 30 0 50
<br /> 0 0
<br /> 0 0
<br /> 0---- Ground Surface
<br /> Sandy Silty Clay-medium to high plastic,dark brown to grey,
<br /> sticky, non-plastic,dark brown silt,very fine sand - . . -. �♦� ♦ �♦��
<br /> Sand-very fine to coarse,w/low plastic,grey-brown clay ►�` ►�`►
<br /> 50 streaks 50 12.75-Inch Dia.Borehole
<br /> ►♦� ♦ ►♦`►
<br /> ----------------------------------------
<br /> Sandy Gravelly Clay-low to high plastic,grey to brown,sticky, ►�` ►�`►
<br /> very fine to medium sand,gravel up to 1/4" - -
<br /> 100 D 100 ►�, ►�`► Annular Seal-10.3-Sack
<br /> -♦� ♦ -♦�- Sand/Cement Grout
<br /> 150 150 ►♦` ♦ ►♦`►
<br /> 200 D 200
<br /> 250 250
<br /> _ __
<br /> Sandy Clay-low to medium plastic blue-grey,sticky,very fine ►i` i ►i`►
<br /> to medium sand,w/gravel stringers up to 3/8" �♦� ♦ �♦��
<br /> 300 __ 300
<br /> Silty Clay-low to medium plastic,blue-grey,non-plastic,grey ►�` ►�`►
<br /> silt,w/very fine to fine sand stringers -♦� ♦ -♦�-
<br /> 350 350 ►�` ►�`►
<br /> ------------------------------------------
<br /> Clayey Sandy Silt-low plastic,blue-grey,sticky, non-plastic, ►i` i ►i`►
<br /> grey silt,very fine to fine sand �♦� ♦ �♦��
<br /> 400 400 �♦� ♦ �♦��
<br /> ♦� ♦ ♦��
<br /> Sand Silt Clay low plastic,blue-grey,stick non-plastic,
<br /> Y Y Y- P 9 Y� Y� P - -
<br /> 450 grey silt,very fine to fine sand,w/trace gravel stringers 450 ' ' ' ►
<br /> ►♦` ♦ ►♦`►
<br /> ------------------------------------------
<br /> Clayey Sand&Gravel-very fine to coarse sand,small gravel, ►�` ►�`►
<br /> w/low plastic, blue-grey clay streaks ►♦` ♦ ►♦`►
<br /> 500 500 �" Well Casing-2.5-Inch Dia.Sch.
<br /> ►�` ►�`► 80 PVC ASTM F480-88A(Typ.)
<br /> ►♦` ♦ ►♦`►
<br /> Sandy Clay-low to medium plastic,blue-grey,sticky,very fine ►♦` ♦ ►♦`►
<br /> 550 550
<br /> to fine sand - �-
<br /> ----------------------------------------• . ►i' i ►i'►
<br /> Sand-very fine to coarse,black,w/trace gravel stringers and -♦� ♦ ♦�
<br /> low plastic,blue-grey clay streaks ►�" ►�"►
<br /> 600 600 ►♦` ♦ ►♦`►
<br /> ►♦` ♦ ►♦`►
<br /> 650 Sandy Gravelly Clay-low plastic, blue-grey,gravel up to 1/4", 650 ♦` ♦ ♦`�
<br /> very fine to coarse sand
<br /> ►♦` ♦ ►♦`►
<br /> 700 700
<br /> LL
<br /> Intermediate Bentonite Seal
<br /> 740-- (TYP•)
<br /> 750 Sand-very fine to coarse,w/small gravel stringers and low 750
<br /> plastic,blue-grey clay streaks 760--- Gravel Envelope-#8 Gradation
<br /> ----------------------------------------• 770--- . . (TYPO
<br /> Sandy Gravelly Clay-low plastic, blue-grey,gravel up to 1/4", 780---
<br /> 800 very fine to coarse sand 800 8.25-Inch Dia. Borehole
<br /> 850 850-11
<br /> 900 900
<br /> Sandy Clay-low to medium plastic,blue-grey,sticky,very fine
<br /> 950 to coarse sand,w/small gravel stringers 950
<br /> 960---
<br /> Sand&Gravel-very fine to coarse,small gravel,w/low plastic, 970-- Well Screen-2.5-Inch Sch.80
<br /> blue grey clay streaks PVC ASTM F480-88A w/0.030-
<br /> 990---
<br /> 1000 1000 1000-- Inch Slots(Typ.)
<br /> ----------------------------------------- 1010-- Well Sump 2.5 Inch Dia.Sch.
<br /> Sandy Gravelly Silt-non-plastic,grey silt,small gravel,very 80 PVC ASTM F480 88A(Typ.)
<br /> fine to coarse sand
<br /> 1050 1050
<br /> 1100 - 1100
<br /> Sandy Clay-low to medium plastic,blue-grey to brown-grey,
<br /> very fine to coarse sand,w/small gravel stringers
<br /> 1150 1150
<br /> 1200 1200
<br /> 1250--- Total Depth-1250 feet
<br /> 1250 1250
<br /> K\2022 Job Files\22-173WSR Phase 2
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