Construction of SBO tank, Vehicle decontamination facility,

Setting up the drilling equipment at each of the drill locations including shifting, earth work, positioning, staging, platform, marking the drill hole location on ground by actual survey etc complete as per the drawing and as directed by engineer in charge.

Boring vertically through all kinds of soils, weathered rock and soft rock with RQD not more than 25% immediatelyunderlying soil overburden / at any depth from founding level/ existing level and classified on the drawing or as directedby the engineer. The item includes logging of the boreholes,measurement of ground water levels in boreholes,collecting the cores, placing them in core boxes made of 18gauge G.I sheets with lifting handles and padlock. (includingsupply of boxes), numbering and labelling them, taking coloured photographs, maintenance of drilling records andsubmission of geological logs with two sets of coloured photographs in hard copy, transporting the core boxes andstoring in a designated storage area at site etc complete. Note: 1. Rate shall be inclusive of providing and installingPVC casing of HX size dia/ suitable for SX size hole, including filling the annular outer space by Bentonite/ othersuitable material as per IS: 12818 or as directed by the Engineer along with necessary coupling, cutting, threading etc.Temporary PVC casing shall be retained till all the tests in a given borehole are completed. Conducting StandardPenetration Test (SPT) in the bore holes @ every 1.5m depth.2. Rate shall include mobilisation and de-mobilisation ofequipment

Boring vertically through bedrock strata having RQD>25% (moderately weathered to hard rock) using diamond bits onlyof size not smaller than (Nx) using double tube core barrel immediately underlying soil overburden / at any depth fromfounding level/ existing level and classified on the drawing or as directed by the engineer. The item includes logging ofthe boreholes, measurement of ground water levels in boreholes, collecting the cores, placing them in core boxes madeof 18gauge G.I sheets with lifting handles and padlock. (including supply of boxes), numbering and labelling them,taking coloured photographs,maintenance of drilling records and submission of geological logs with two sets ofcoloured photographs in hard copy, transporting the core boxes and storing in a designated storage area at site etccomplete. Note: 1.Rate shall be inclusive of providing and installing PVC casing of HX size dia/ suitable for SX sizehole, including filling the annular outer space by Bentonite/ other suitable material as per IS: 12818 or as directed bythe Engineer along with necessary coupling, cutting, threading etc. Temporary PVC casing shall be retained till all thetests in a given borehole are completed.

From 0 M upto 20 M

More than 20 M upto 50 M

Carrying out geological surface mapping of excavated area including cleaning, washing and removable of loose materials, taking digital colour photographs of all faces, submission of the colour photographs (100 mm x 150 mm) in album with proper index along with geological surface maps, toposheets,date of sampling etc complete.The rate shall include the cost of all the enabling works viz. scaffolding, ladders etc. as required. The geological mapping has to be carried out through an experienced Geologist whose credentials have been accepted by the Engineer. The item shall include preparing scaled maps and providing coloured prints. Mapping shall include horizontal, inclined and vertical surfaces of the foundation pit as directed by the Engineer

Conducting static plate load test to determine the Safe Bearing Capacity (SBC) of soil as per IS:1888, IS:12070,Technical specifications (and IS 9214 to determine the Modulus of Sub grade Reaction) at the bottom of the foundationlevel up to 75 T / sq.m or failure by reaction method including all preparatory works to conduct the test, equipmentstools & tackles, manpower, submission of reports. The minimum size of test plates shall be 600mm x 600mm. The rateis inclusive of preparation of test reports in triplicate and one soft copy (CD)

Mobilizing equipment, Conducting Cross-hole Seismic test in bore holes at locations as directed by the Engineer and as per IS 13372 (Part 1&2), ASTM 4428M, Technical specifications and drawings, with one hole as the source and two numbers of receiver holes in each perpendicular direction (one central source hole and four receiver holes) per test to the depths specified not exceeding 50m) taking reading at every 1.5 m interval including submission of test report. The test shall be conducted by an approved agency. Note: 1. Drilling of source and receiver holes will be measured and paid in relevant drilling items of BOQ.

Mobilizing equipment, conducting test in bore hole as per ASTM 6274 and ASTM D-5753 to evaluate in-situ field density of rock using gamma-gamma radiation logging by an approved agency at locations indicated by the Engineer, submission of report etc complete. The test shall be conducted on the central hole of the cross-hole seismic test along the depth. In case the test is needed to be conducted at other location, the drilling of required bore holes will be paid under relevant item.

Drilling of 76mm /110 mm diameter vertical holes by percussion drilling through all types of soil and rock strata up to the depths specified as per drawing including providing and fixing suitable casing pipe for the initial depth upto 1m and removal of the same etc all complete and as instructed by the Engineer.