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Connestoga-Rovers&*. ociates 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-20 <br /> JOB/SITE NAME JIMCO Truck Plaza DRILLING STARTED 15-Mar-07 <br /> LOCATION 1022 Frontage Road,Ripon,CA DRILLING COMPLETED 15-Mar-07 <br /> PROJECT NUMBER 165-1556 WELL DEVELOPMENT DATE(YIELD) NA <br /> DRILLER Gregg Drilling C57#485165 GROUND SURFACE ELEVATION 60.5 ft amsi <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(15-Mar-07) <br /> REVIEWED BY B.Wilken,PG#7564 DEPTH TO WATER(Static) NA 1 <br /> REMARKS Collected grab groundwater sample through 3/4 inch diameter temporary PVC casing with 10' of screened casing <br /> w <br /> U U n <br /> CL =�` a a a U LU ° O DESTRUCTION METHOD DESCRIPTION = WELL DIAGRAM <br /> a a w �J OW <br /> U) U <br /> 0 <br /> ASPHALT: 3 inches thick. 0.3 0 Concrete <br /> FILL:Road Base 1.0 <br /> o' ° '°o <br /> Silty SAND: Light brown;medium dense;dry;40%silt, <br /> 60%fine grained sand;non-plastic;moderate estimated <br /> permeability. <br /> @ 3.5': Cemented zone of Silty SAND-hard pan:dense; <br /> low estimated permeability. <br /> 5 SM <br /> @5.5': medium dense;moderate estimated permeability. <br /> 0 <br /> @8': Light gray;loose;20%silt,80%fine to medium 9.0 <br /> cLrained sand------------------ <br /> 0 Sandy SILT: Light brown;medium stiff;dry;70%silt, <br /> e-20@ is 10 ML 30%fine grained sand;non-plastic;low estimated_ _ _ 10.5 <br /> iTUW%nd Light gray/light brown;medium stiff;dry_ <br /> ML 90%silt,10%fine grained sand;non-plastic;low <br /> 0 estimated permeability. __ ____________ 12.5 <br /> —Silty SAND: Light gray;loose;dry; 15%silt,85%fine to <br /> SM medium grained sand;non-plastic;high estimated <br /> e 0 -- erebilit I 14.0 <br /> ma <br /> ---5'------------------- <br /> B-20@ 1s, ML SILT with sand: Light and dark brown;medium stiff;dry; 15.0 <br /> 15 — 90%silt;10%fine grained sand;non-plastic;low i <br /> o �\estimatedpermeabil!y. ----- — —/ Portland Type <br /> q SM Silty SAND: Brown;medium dense;dry;30%o silt,70% I/II <br /> D fine grained sand;non-plastic;moderate estimated <br /> o permeability. _ _ _ __ __ 18 0 <br /> LU e-zoe�e -- -- — — --- --- <br /> SILT with clay and sand: Light chaulky brown;medium <br /> stiff;moist;10%clay;80%silt, 10%fine grained sand;low <br /> 0 0 B-20@ 2U 20 ML plasticity;low estimated permeability. <br /> z ______ _ _ __ 21.0 <br /> 0 —— — —— ———— — —— — ——— <br /> LL 0 Silri SAND: Orange/brown;medium dense;dry;30% <br /> s-zoo 22' silt,70%fine to medium grained sand;non-plastic; <br /> SM moderate estimated permeability. <br /> @22': Moist. Q <br /> 0@23': Wet. <br /> (� 0.0 B-20C 24' —–'—— —__—___—___——— <br /> 24.0 <br /> ML I Sandy SILT: Brown;medium stiff;wet;70%silt,30% 25.0 <br /> 0 25 -- fine rained sand;non plastic;lowestimated-permeability_ <br /> SAND with silt: Brown and white;loose;wet; 10%silt, <br /> a o 90%fine to coarse grained sand;non-plastic;high <br /> B-20@ 27' SW estimated permeability. <br /> } <br /> 0 <br /> 29.0 <br /> SILT with clay and sand: Orange/brown;stiff;moist; <br /> L <br /> <1.o B-zoo so' 30 ML 10%clay,80%silt, 10%fine grained sand; low plasticity; 30.0 Bottom of <br /> low estimated ermeabili Boring @ 30 ft <br /> bgsPAGE 1 OF 1 <br />