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Connestoga-Rovers&NAV9ociates SOIL BORING LOG <br /> 5900 Hollis Street,Suite A <br /> Emeryville,CA 94608 <br /> Telephone: 510-420-0700 <br /> Fax: 510-420-9170 <br /> CLIENT NAME Olympian JV WELL NAME B-23 <br /> JOB/SITE NAME JIMCO Truck Plaza DRILLING STARTED 14-Mar-07 <br /> LOCATION 1022 Frontage Road,Ripon,CA DRILLING COMPLETED 14-Mar-07 <br /> PROJECT NUMBER 165-1556 WELL DEVELOPMENT DATE(YIELD) NA <br /> DRILLER Gregg Drilling C57#485165 GROUND SURFACE ELEVATION 60.0 ft amsl <br /> DRILLING METHOD Direct Push TOP OF CASING ELEVATION NA <br /> BORING DIAMETER 2.5 inches SCREENED INTERVAL NA <br /> LOGGED BY G. Reiss DEPTH TO WATER(First Encountered) 23.0 ft bgs(14-Mar-07) S <br /> REVIEWED BY B.Wilken,PG#7564 _ _ DEPTH TO WATER(Static) NA T <br /> REMARKS Collected grab groundwater sample through 3/4 inch diameter temporary PVC casing with 10' of screened casing <br /> CJ U <br /> E v '' _j w ad a OO DESTRUCTION METHOD DESCRIPTION WELL DIAGRAM <br /> CL o F-E a. ~xt wS: 6 '' O <br /> a ¢ W o 0 Uw <br /> co 0 <br /> ASPHALT: 3 inches thick. 0.3 Concrete <br /> FILL: <br /> FILL:Road Base —1.0 <br /> 0 �•�o <br /> Silty SAND: Light brown;medium dense;dry;40%silt, <br /> 60%fine grained sand; non-plastic;moderate estimated <br /> permeability. <br /> SM @4': Cemented zone of Silty SAND-hard pan:dense; <br /> 5 low estimated permeability. <br /> @6': medium dense;25%silt,75%fine to medium <br /> grained sand. <br /> _ —— 8.0 <br /> SILT with sand Light brown;medium stiff;dry;90%silt, <br /> MLI 10%fine grained sand;non-plastic;low estimated <br /> 0 permeability._____ _ _ _ __ _ 10.0 <br /> B-2310' ______ — — -- — _. --- <br /> 10 — Silty SAND; Light gray;medium dense;dry;20%silt, <br /> 80%fine grained sand; non-plastic;moderate estimated <br /> ° permeability. <br /> 2.8 B-230 12' <br /> SM @11': Moist. <br /> @12': Dry. <br /> _ ____________ __________ __ 14.0 <br /> e 2 SILT with clay and sand Light brown/gray,medium stiff; <br /> B-23015" 15 ML dry;10%clay,80%silt, 10%fine grained sand;low <br /> plasticity;low estimated permeability.__________ 16.0 Portland Type <br /> F 3 Silty SAND: Light gray;loose;dry;20%silt,80%fine I/II <br /> w50 s2o SM grained sand;non-plastic;high estimated permeability. <br /> o B-230 18' <br /> __ ___________ __________ ___ 18.5 <br /> SILT with clay and sand: Gray,medium stiff;moist; 10% <br /> c6 23 ML I clay,80%silt, 10%fine grained sand;low plasticity;low 20 0 <br /> o8-23®z°' 20 —— `estimated permeability_————— — —— <br /> Z Slity SAND: Gray;medium stiff;moist;30%silt,70% <br /> e7 fine grained sand;non-plastic;moderate estimated <br /> B-230 22' permeability. <br /> J <br /> o SM @22.5: Light and dark gray;loose;moist;20%silt,80% <br /> FZ 159 fine to medium grained sand;non-plastic;high estimated <br /> c`J9 130 g_Y3@ 24' _ permeability. <br /> -- —@23': Wet. — — ---- -- — -- 25.0 <br /> 25 Sandy SILT with clay: Brown/orange;medium stiff;wet; <br /> 15 ML 10%clay,70%silt,20%fine grained sand;low to <br /> ° B-230 2T moderate plasticity;low estimated permeability. <br /> -- — ----- ------ 27.5 <br /> o Silty SAND with gravel: Brown/orange;very dense; <br /> & SM moist;20%silt,70%fine to coarse grained sand, 10%fine <br /> gravel;non-plastic;low estimated permeability. <br /> 0 <br /> a <1.0 B-23C 30' 30 30.0 Bottom of <br /> ° Boring @ 30 ft <br /> bgs <br /> PAGE 1 OF 1 <br />