Details: drilling and boring pilot hole in any soil strata by drilling rig, collection of soil samples of different strata met with during drilling at various suitable levels, preservation of samples in polythene bags/ sample boxes and disposal of excess soil or mud, including the cost for bentonite, water etc. as required to maintain the pilot hole properly as per specification ( is : 2800 (part-i)) and direction of the engineer - in - charge.(a )with contractor's rig i) 200 mm dia. considering 10000gph=2 nos reaming of pilot hole to an enlarged bore hole in any soil strata by drilling rig,disposal of excess soil or mud, including the cost for bentonite, water etc. as required to maintain the bore hole properlyas per specification( is : 2800 (part-i)) and direction of the engineer - in - charge.(a )with contractor's rig i) from 200 mm dia pilot hole to 550 mm bore hole ii) from 200 mm dia pilot hole to 460 mm bore hole washing ofenlargedbore hole of 460 -550 mm dia in any soil strata by dril
Sector: PWD