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Subcontractor Geo Environmental Drilling Log of Boring/Monitoring Well TB 12 <br /> Drilling Method Start Time SIMCO 2400SK-1 Start Date 3-30-94 Stt T 150 Hours it <br /> 7 HSA Project Name Chapin Bros <br /> Project No N0014-001-01 <br /> Sampling Method 2 CMSS Finish Date 3--30-94 Finish Time 305 Hours Project Location 1760 Monte Diablo <br /> First Water/Static Water Level (BGS) 2185 ft Logged By J Clayton Page 1 of 1 <br /> h <br /> aSurface Elevation Casing Top Elevation <br /> o- <br /> a 6 I '@ y v ,ar, v o Boring Abandonment/ <br /> ai LITHOLOGIC DESCRIPTION Well Construction Details <br /> 010 <br /> 111930 (L 5 9.q a C a 5 (n (color soil type moisture consistency other) <br /> 0 2 ASPHALTIC CONCRETE + 4 BASE ROCK <br /> SC HaeldWed <br /> - - MEDIUM BROWN CLAYEY FINE SAND .nth <br /> Neat <br /> Cement <br /> I <br /> 7 5 <br /> 10 GRAYISH LIGHT BROWN SILT WITH CLAY AND TRACE <br /> 4 13 18/17 ML VERY FINE SAND, FEW BLACK PARTINGS (DECOMPOSED <br /> ROOTS) DRY TO DAMP STIFF NO ODOR <br /> 5 VII I <br /> 7 10 1 I i I LIGHT BROWN SILTY FINE SAND DAMP LOOSE TO <br /> 0 10 18/18 I SMI SLIGHTLY DENSE NO ODOR <br /> Ilrlrl <br /> II � I � I <br /> r <br /> 4 15 <br /> 4 ; ;; ; ; ; ; SLIGHTLY GRAYISH LIGHT BROWN VERY FINE SANDY SILT <br /> 0 5 18/18 ; ;; ; ; ; ; TO SILTY VERY FINE SAND DAMP VERY LOOSE NO ODOR <br /> SM/MLi <br /> 4err <br /> 5 20 I I I SLIGHTLY GRAYISH MEDIUM TO DARK BROWN FINE SAND <br /> 0 5 18/18 1 SMI WITH TRACE SILT WET VERY LOOSE, NO ODOR <br /> 25 <br /> BORING COMPLETED AT 22 0 BELOW GROUND SURFACE <br /> GROUNDWATER ENCOUNTERED IN BORING AT 2185 BELOW <br /> GROUND SURFACE <br /> 30- <br /> 35- <br /> 40- <br /> 45- <br /> 50 <br /> 035404550 <br /> Reviewed by Date <br /> S E A C O R <br /> Revised by Date <br />