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Drilling Lag <br /> ITIT CORPORATION Monitoring Well MW-4A <br /> A Member of the IT Group <br /> Project7`Eleven, SSW 19976 Owner 7-Eleven Inc See Site Map <br /> 1399 N Mann Street, Manteca CA 779956 For Boring Location <br /> Location — Prol No <br /> Surface Elev 33 03 ft Total Hole Depth 50 ft Diameter 8 in COMMENTS <br />' Top of Casing 32 48 ft Water Level Initial 20 ft Static NA ft <br /> Screen Dia 2 in Length 5 ft Type/Size Sch 40 0 020 in <br /> Casing Dia 2 in Length 45 ft Type Sch 40 PVC <br /> Fill Material Cement grout_ Rig/Core Mobile Drift 8-61 <br /> Drill Co Gregg Drilling „ _ Method Hollow Stem Auger <br /> Driller Trevor Joyner Log By Douglas Gay Date 05/17/99 Permit # <br /> Checked By Ed Simonis License No California RG#4422 <br /> C <br /> o Oma. > cn <br /> y ❑2SCrl t10n <br /> y - i t iD <br /> aZ:f� wm ao a 0 ao P <br /> 1 V- E Q a m vl (Color, Texture, Structure) <br /> `° (n Trace < 10%, Little 10% to 20%, Some 20% to 35%. And 35% to 50% <br /> -2 <br /> 0 <br /> < Fine SAND brown dry, no hydrocarbon odor <br /> 2 SW <br /> < 4 <br /> < G <br /> 4 ` <br /> 40 o Mw-aA5 Silty, fine SAND (60 40) brown dry, no hydrocarbon odor <br /> 6 < < 6 SM Recovery at 80% <br /> 12 <br /> < < <br /> 8 < < 0 0 raw-4A@8 15 Recovery at 90% <br /> ` < 15 SILT with very fine SAND (80 20) brown dry no hydrocarbon <br /> 14 odor <br /> < < ML <br /> 10 <br /> 12 <br /> < < <br /> 0 o raw-11a@13 1l Recovery at 75% <br /> 14 < < 15 SP Fine SAND tan-brown dry loose subangular <br /> < < Grades fine to medium SAND no hydrocarbon odor <br /> 16 qr< <br /> ` < <br /> 18 < < 0 0 raw-4A@19 9 ML <br /> Recovery at 95% <br /> 12 Silty SAND (20 80) interbedded with sandy SILT (70 30) brown <br /> < < i5 moist micaceous nc hydrocarbon odor <br /> 20 <br /> 22 SM Interbedded silty SAND and sandy SILT grayish brown wet soft <br /> < < no hydrocarbon odor <br /> ` < 0 0 aw-4Ag23 n Recovery at 90% <br /> 24 s <br /> 0772111a19q hti,iog-niar 99 Page I of 2 <br />