provision of raw water well and connecting pipeline and unit shop at cgra mandapam under ge ( i ) ( cg ) chennai , ( a ) drilling of 03 bores of diameter 150 mm depth of borehole upto 15m or upto refusal strata where n value reaches 50/100 ( whichever is earlier ) ( b ) conducting spt at every 1 . 5 m interval and changes of strata . ( c ) performing relevant lab tests ( d ) grain size distribution and analysis . ( e ) soil characteristic . ( f ) value of cohesion and angle of internal friction . ( g ) recommended sbc at different depth of foundation i . e . at 900mm , 1000mm , 1200mm , 1500mm & 1750 mm etc . ( h ) sbc and its calculation based on n-value shear strength . ( i ) depth of water table . ( j ) depth of expansive soil and its properties if any and submission of report with the the recommendation on type of foundation . ( k ) six set of test report to be fwd to this office after completion of the work .