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Subcontractor Geo Environmental Drilling Log of Boring/Monitoring Well B4 <br /> Drilling Method CM1155 8' HSA Start Date 12-28-93 Start Time 1215 Hours project Name Chapin Bros M 4 <br /> . Project No N0014-001-01 <br /> Sampling Method 2' CMSS Finish Date 12--28-93 Finish Time 140 Hours Project Location 1766 Monte Diablo <br /> First Water/Static Water Level (BGS) 23 3/22 5 Logged By J Clayton Page 1 of 1 <br /> u v Surface Elevation 7 15 sing Top Elevation 672C, <br /> a p v cp ° C a s a m a Well ConstructionaDetails <br /> W ; 0 a� U E LITHOLOGIC DESCRIPTION <br /> invLorzi <br /> C a p a q (color soil type moisture consistency other} <br /> 0 2 ASPHALTIC CONCRETE <br /> FILL BROKEN CONCRETE (FILL) <br /> 7 5 MEDIUM BROWN SILTY CLAY TO CLAYEY SILT WITH TRACE cement <br /> 15 PEBBLES AND VERY FINE SAND, RUSTY PARTINGS AND <br /> 0 20 18/13 CL/ML BLACK CLASTS DAMP STIFF NO ODOR <br /> I <br /> i <br /> e to <br /> 10 MEDIUM BROWN CLAYEY SILT CONTAMINATION 011 3 Bentonite <br /> 3 11 18/12 Mips <br /> i <br /> LIGHT MEDIUM GRAY VERY FINE SANDY SILT DAMP, SOFT <br /> ML MODERATE ODOR OF PETROLEUM HYDROCARBONS <br /> 7 I I <br /> 9 15 I I I I f I LIGHT MEDIUM GRAY FINE SAND WITH TRACE TO SOME <br /> 27 15 18/18 111111 SILT DAMP LOOSE TO SLIGHTLY DENSE MODERATE ODOR <br /> l� l � l OF PETROLEUM HYDROCARBONS <br /> Itl <br /> 5 <br /> 11111 <br /> 6 20 1 <br /> III 1 k 1 MEDIUM GRAY SILTY VERY FINE SAND MOIST, LOOSE <br /> 34 7 18/16 111111 MODERATE ODOR OF PETROLEUM HYDROCARBONS <br /> I <br /> 1 SM 1 <br /> 2 25 Send <br /> 22 3 18/18 111 I I I MEDIUM GRAY SILTY VERY FINE SAND SATURATED <br /> (FLOWING) EXTRA LOOSE, MODERATE ODOR OF PETROLEUM <br /> HYDROCARBONS <br /> E I I <br /> 9 111111 <br /> 14 30 I I j I i MEDIUM GRAY SILTY VERY FINE SAND WITH TRACE CLAY <br /> 0 17 18/18 1 I I MOIST MEDIUM DENSE SLIGHT ODOR OF PETROLEUM <br /> 1tk11 � HYDROCARBONS <br /> 8 35 ML MEDIUM GRAY CLAYEY SILT WITH TRACE VERY FINE SAND <br /> 13 AND FINE GRAINED SAND CLASTS MEDIUM STIFF DAMP <br /> 0 18 18/18 SLIGHT ODOR OF PETROLEUM HYDROCARBONS <br /> Screened <br /> BORING COMPLETED AT 365' BELOW GROUND SURFACE 002(r <br /> GROUNDWATER ENCOUNTERED IN BORING AT 23 3 Slotted <br /> 40 BELOW GROUND SURFACE Casing <br /> �. 45 <br /> 50 <br /> S E A C O R Reviewed by Date <br /> Revised by Date <br />