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Advanced BORING LOG <br /> GeoEnvironmental, Inc. <br /> - � BOREHOLE NO MW-7 <br /> ' 4005 North Wilson Way, Stockton, CA 95205 <br /> �—� 209 467-1006 FAX 209 467.1118 TOTAL DEPTH 301 <br /> Project COMFORT AIR Drilling Co V & W Drilling <br /> Site Location 1607 Turnpike Road Rig/Auger Type Boart Longyear 81/8 25" HSA <br />' Stockton Logged By Paul Dotson <br /> California <br /> Reviewed By Nuel Henderson <br /> Project No AGE-NC-95-0141 Date(s) Drilled 26 October 2000 <br /> Notes Total depth of boring 30'below surface grade Boring Yz Water level during dnlling Page 1 of 1 <br />' completed as 2-inch diameter ground water monitoring well = Water level in completed well <br /> F <br /> pth Sample Blows PID Sod USCS Class and Well Well <br />' 7lD (per 6") (ppm) Symbol Soil Description Completion Description <br /> 0 Well cover cnsty box <br />' CL CLAY,with stat,trace of black rounded fragments, <br /> moderate plasticity,brown,damp,no petroleum <br /> -5 hydrocarbon(HC)odor,very stiff to hard,90% <br /> MW7-5 10/18/36 0 recovery Cement grout seal from <br />' 5'to I l'bsg <br />' CL SILTY CLAY,low plasticity,brown,damp,no HC <br /> odor hard,50%recovery <br /> -10 MW7-10 20!26136 0 <br /> IBentonite seal from l l' <br /> to 13' bsg <br />' - CL SANDY CLAY,approximately 40%fine sand,tan <br /> VA! to brown,moist,very stiff to hard,70%recovery <br /> 15 MW7-15 8118/50 0 <br /> 1 #2112 sand from 13'to <br /> 30'bsg <br /> SP POORLY GRADED SAND,some fines,fine sand, <br />' 'Wr brown,saturated,faint HC odor,rnedtum dense,100% <br /> -20— recovery <br /> MW7-20 619118 0 <br /> Screened interval from <br />' 15'to 30'bsg <br /> SP POORLY GRADED SAND,with clay, <br /> approximately 10%fines at top of sampler,more fines <br />' I - <br /> 25 <br /> at bottom of sampler,fine to coarse sand,brown,dense <br /> MW7-25 8127132 0 to very dense,HC odor,100%recovery <br /> • I <br />' CL CLAY,some silt,high plasticity,bluish gray, <br /> saturated,no HC odor,very stiff to hard,90%recovery <br />' -30 <br /> MW7-30 �18j,.7�1500� Cap at 30' <br />