construction of roads, parking providing &laying of water supply & sewerage line of shopping centre in sector-1, pataudi. “providing & laying ofci / di pipes of 100 mm dia for water supply line including providing & fixing of sluice valve, providing & laying of 200 mm i / d sw pipes for sewerage, construction of manhole, providing & laying of rcc np-3 pipes 400 mm dia for storm water drainage including construction of manhole for swd. construction of road & parking including preparation of sub grade, providing & laying of tack coat, 200 mm gsb, 200 mm wmm, 50 mm thick bm, 30 mm thick bc and 60 mm thick interlocking tiles and all other works contingent thereto” ( defect liability period of 3 years ) .