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09/28/07 16:02 $510 842 8970 CHEVRON U.S.A. - 0016/024 <br /> `./ I./ <br /> ❑��� Drilling Log <br /> —� ( GROUNDWATER Monitoring Well MW-12 <br /> �ID TECHNOLOGY <br /> Project 'hEv/On - SlocktOn owner Cnevron U.S.4. Products Co. See Site Hap <br /> 45 East Hardrno wav 02070 3399 06/29/93 For Boring Location <br /> Location � - Project No. pate drilled ' <br /> Surface Blev. Total Mole Depth 86.5 ft. _ Diameter 7 'n• ft. COMMENTS: <br /> Top of Casing water Level Initial !?Jt. Static <br /> Screen: Dia 2 in. Length 35 ft. Type/Size 0.020 in. <br /> Casino:Dia 2 in. Length 30 ft. _ Type Sched. 40 PVC <br /> Filter Pack Material t3—Sand -- Rig/Core Type C=7 /SG/if.spoon <br /> Drilling Company Soils Ex..Services Method H0110w stem auoer _ Permit Y <br /> prlller Mike Oultv Log Dy Rof Herlaro <br /> Checked By Ed SimOnl5 License No.RG -422 ^_ EHARMw1?10;b <br /> r C V p <br /> a �W oe voo ro Description <br /> GVu nu <br /> il <br /> '�� W (Color, Texture, Structure) <br /> 0 l tnmK N Trace < 10X, Little 10% to 20X, Some 20X to 35%, And 35% to 50% <br /> 7 <br /> -2 <br /> Q Ac. 12 inches of asphalt <br /> I <br /> Dark gray CLAY: $C% clay, 20% silt, `.race very fine sand <br /> 2 ` < CR (slightly moist, high plasticity, no hydrocarbon odor) <br /> < < Yellow brown silty SAND: 60% fine sand. 40% silt (slightly <br /> 4 JI < < n11,_ SM moist to dry, very dense, friable, no hydrocarbon odor) <br /> {�< < 0 2 <br /> 6II Yeuow orange SILT: 70' silt, 20%, clay. 10- fine sand (slightly <br /> ` ` I 14 moist, low plasticity, no hvdroCarbo^. odorl <br /> < < Ir <br /> S <4r r <br /> < 1 <br /> < < <br /> IdY;- <br /> 12-10 IML <br /> 10 ` 0 Light brown sandy SILT: 257: fine sand. 6°: medium sand. 201b clay, <br /> l < 2A 50 a silt (Criss-crossed with caliche veins, dry, brittle, <br /> no hycrocarbon odor) <br /> 12 ` r` <br /> 14 < < , I <br /> I MY!- <br /> I1` ` 0 g Red brown silty SAND: 70% fine sand, 301% silt, trace mica <br /> (s1sontly moist, friable, no hydrocarbon odor) <br /> t``v I s <br /> I < < <br /> 18 ` ° I II <br /> I <br /> � < < l <br /> I M <br /> Ih'- SK <br /> c l4'[0 <br /> ZQ — C 0 z (Graces 0:8\ br o4n, moist! <br /> I e <br /> 22 < <br /> I <br /> ll L <br /> 24 I` I I <br /> Dal''C!i991 PBCe: 1 04 31 <br />