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Orilling Log <br /> ITIT CORPORATION Monitoring Well MW-4A <br /> A Member of the 17*Group <br /> Project7=tEleven, SSI 19976 Owner 7-Eleven, Inc. See Site Map <br /> 1399 N. Main Street, Manteca CA 779956 For Boring Location <br /> Location _ Proj.No. <br /> Surface Elev. 33.03 ft. Total Hole Depth 50 ft. Diameter 8 in. <br /> COMMENTS.' <br /> Static <br /> Top of Casiig 32.48 ft. Water Level Initial 20 ft. 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 Drill B-61 <br /> Drill Co. Gregq Drilling Method Hollow Stem Auger <br /> Driller Trevor Joyner Log By Dowlas Gay Date 05/17/99 Permit # <br /> Checked By Ed Simonis License No. California RG#4422 <br /> C O > y <br /> O + C U N <br /> aw .v�, 0E m o > rte, Description <br /> Q V 0 0•0 U <br /> a� ;E ° a E s v °J N (Color, Texture, Structure) <br /> o" N m j 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 /> < < <br /> 4 ` <br /> ` ` 0.0 NW-4@5' 4 Silty, fine SAND (60,40): brown, dry, no hydrocarbon odor. <br /> 6 < < 2 SM Recovery at 80%. <br /> 126 <br /> < c <br /> < < <br /> 8 0.0 MW-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 /> c < <br /> 12 <br /> 0.0 WW-4013' 11 Recovery at 75%. <br /> 26 <br /> 14 r r 15 SP Fine SAND: tan-brown, dry, loose, subangular. <br /> < < Grades fine to medium SAND: no hydrocarbon odor. <br /> 16 < < <br /> 18 Recovery at 95%. <br /> < < 0.0 KW-4A@19' 9 ML <br /> 12 Silty SAND (20,80): interbedded with sandy SILT (70,30): brown, <br /> < < 15 moist, micaceous, no hydrocarbon odor. <br /> 20 <br /> SM Interbedded silty SAND and sandy SILT: grayish brown, wet, soft, <br /> 22 < < no hydrocarbon odor. <br /> ` ` 0.0 NW-4023' a Recovery at 90%. <br /> 24 is <br /> 07/21/1999 lithoq-Mar.99 Page: I of-2 <br />