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�i Drilling Log GROUNDWATER TECHNOLOGY Monitoring Well MW-12 Protect Chevron - Stockton owner Chevron u A Products Co See Site Map 45 East Hardmo wav 02070 3399 06129/93 For Boring Location Location Prosect No Date drilled ' Surface Elev Total Hole Depth 665 ft Diameter lin ft COMMENTS Top of Casing Water Level Initial 52 ft Static Screen Dia 21n Length 35 ft Type/Size 0 020 to Casing Dla 212 Length 30 ft Type SChed 40 PVC Filter Pack Material *3 Sand Rig/Core Type C47/Sob f s oon Drilling Company Soils Ex Services Method Hollow stem aucer Permit iF Driller Mike Duffv Log By Rol Hertato ' Checked 6y Ed Slmonrs License No RG 4422 EHARMWI2/dsb e as oo �, Description ..a U Qp Q" o a ro o� -7 (Color, Texture, Structure) U Wmx u) Trace < 10%, Little 10% to 20%, Some 20% to 35%. And 35% to 50% ' -2 0 Asp 12 inches of asphalt Dark gray CLAY 80% clay, 20% silt, trace very fine sand 2 < < CH (slightly moist, high plasticity, no hydrocarbon odor) 4 Yeliow brown silty SAND 60% fine sand, 40% silt (sightly Mw- SM moist to dry, very dense, friable, no hydrocarbon odor) ' c < 12-5 0 7 6 < < 11 Yellow orange SILT 70% silt, 20% clay, 1Q% fine sand (slightly 14 moist, low plasticity, no hydrocarbon odor) < c ' g c < < < Mw— ' 10 c < i2-10 Mt a 0 Light brown sandy SILT 25% fine sand, 59� medium sand 201% clay 14 r < c 24 50% silt (Criss-crossed with caliche veins, dry, brittle, zr no hyarocarbon odor) 12 c < 14 < < lMw— < c 12-15 i 0I s Red brown silty SAND 70% fine sand, 30% silt, trace mica 16 < < 9 (slightly moist iriaDle, no hydrocarbon odor) io 18 i < < j I sM 20 < < j ,,z-2o p I n (Grades gray brawn moist) e I B 22 < c ' 24 < < ML 06/30/1993 idhiog-marK PeCe I of