Addendum-01 & Pre-bid Replies/Clarifications for Tender No:P2C3/Geo-02/2018 – “Detailed Geotechnical Investigation by Drilling Bore holes and collecting and testing the samples and submission of Geotechnical reports from PATTALAM to Thousand lights of Corridor-3 (Total Length = 7.79 KM (CH:7947.00 to CH:15742.00))” for UNDER GROUND section of Phase II Chennai Metro Rail Limited.