As Per TDS.
Execution of Sub-Surface Geological Investigation and Installation of 18 Nos. Observation Wells. Execution of Sub-Surface Geological Investigation and Installation of Observation Wells across multiple locations in Khulna, Satkhira, Pirojpur, and Bagherhat districts. The scope of works includes 7-inch dia boring through all strata by reverse circulation, systematic soil sampling, and the preparation of a standard Sub-Soil Investigation Report. Furthermore, the work involves the complete installation of 3-inch dia uPVC tube-well fixtures, proper shrouding and sealing using coarse sand and bentonite clay, pump development for at least 6 hours, and the construction of 2.5' x 2.5' concrete platforms with 4' x 2' x 2' iron cases for well protection.