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LOG OF EXPLORATORY BORING <br />PROJECT NUMBER 939-03.14 BORING NO. MW -4 <br />PROJECT NAME San Joaquin County - Corral Hollow Landfill PAGE 1 OF 2 <br />BY S. Lofholm DATE 4/11/88 SURFACE ELEV. 243.31' <br />1.2/1.5 25 SP <br />1.5/1.5 19 5 <br />SM <br />11.111.51 I 18 <br />11.2/1.51 1 38 <br />CL <br />1.2/1.51 ( 35 � 1 <br />1.511.51 1 26 <br />1.511.51 1 20 <br />SAND, brown 00YR, 4/3); <5% fines; 90% <br />fine sand, 10% medium to coarse sand, <br />subangular to subrounded, predominantly <br />quartzose; trace fine gravel; medium dense; <br />dry. <br />SILTY SAND, brown (10YR, 4/3); 40% fines; <br />60% fine, trace medium to coarse sand; minor <br />brown rootlets; trace iron oxide coating on <br />grains; medium dense; moist. <br />SILTY CLAY, olive (5Y,5/3); low plasticity <br />fines; 5-10% fine sand; trace iron oxide in <br />small concretions; very stiff; damp to moist. <br />@ 9.5 feet: < 5% fine sand. <br />@ 11 feet: trace very fine muscovite; <br />increasing moisture content. <br />POCKET <br />PENETRA- <br />C1MIA <br />g . <br />W <br />LITHO- <br />J <br />RECOVERY <br />PETER <br />TION <br />®�j <br />aU. <br />1L <br />GRAPHIC <br />JQ <br />DESCRIPTION <br />@ 15.5 feet: very thin ( < 0.1") sandy <br />( Ft ) / <br />3J <br />®H <br />¢ <br />COLUMN <br />3W <br />(FT/FT) <br />(TSF) <br />1.5/1.5 <br />(g <br />26 = <br />N <br />concretions; trace rootlets. <br />CI <br />@ 17.5 feet: moist to wet. <br />1.511.5 <br />/ <br />29 <br />@ 18.5 feet: than sandy interbeds, saturated. <br />0 <br />SM <br />SILTY SAND FILL light yellowish brown <br />g <br />(10YR, 6/4) to dark yellowish brown (10YR, <br />4/6); 25-30°x6 fines; fine sand; trace fine <br />gravel; loose; dry. <br />1.2/1.5 25 SP <br />1.5/1.5 19 5 <br />SM <br />11.111.51 I 18 <br />11.2/1.51 1 38 <br />CL <br />1.2/1.51 ( 35 � 1 <br />1.511.51 1 26 <br />1.511.51 1 20 <br />SAND, brown 00YR, 4/3); <5% fines; 90% <br />fine sand, 10% medium to coarse sand, <br />subangular to subrounded, predominantly <br />quartzose; trace fine gravel; medium dense; <br />dry. <br />SILTY SAND, brown (10YR, 4/3); 40% fines; <br />60% fine, trace medium to coarse sand; minor <br />brown rootlets; trace iron oxide coating on <br />grains; medium dense; moist. <br />SILTY CLAY, olive (5Y,5/3); low plasticity <br />fines; 5-10% fine sand; trace iron oxide in <br />small concretions; very stiff; damp to moist. <br />@ 9.5 feet: < 5% fine sand. <br />@ 11 feet: trace very fine muscovite; <br />increasing moisture content. <br />—20 <br />REMARKS <br />Drilled by 8 -inch continuos -flight hollow -stem augers; samples collected with 2.5 -inch <br />outside -diameter modified California split -spoon sampler. Borehole converted to 2 -inch <br />EIVICON monitoring well as shown on Well Details. <br />1 <br />1.5/1.5 <br />23 6i1/88 <br />15 <br />1.5/1.5 <br />27 <br />@ 15.5 feet: very thin ( < 0.1") sandy <br />interbeds, fine grained, subangular to <br />angular, quartzose; trace iron oxide <br />1.5/1.5 <br />26 = <br />concretions; trace rootlets. <br />@ 17.5 feet: moist to wet. <br />1.511.5 <br />/ <br />29 <br />@ 18.5 feet: than sandy interbeds, saturated. <br />—20 <br />REMARKS <br />Drilled by 8 -inch continuos -flight hollow -stem augers; samples collected with 2.5 -inch <br />outside -diameter modified California split -spoon sampler. Borehole converted to 2 -inch <br />EIVICON monitoring well as shown on Well Details. <br />