Specifications include, but are not limited to: l install additional drain field, catch basins, drain pipe and inter-connect the existing drainage piping. Also the contractor will clean existing drainage piping with associated structures. This project includes all site restoration activities. Rock excavation shall include removal and disposal of the following: (1) all boulders measuring 1/3 of a cubic yard or more in volume; (2) all rock material in ledges, bedding deposits, and unstratified masses which cannot be removed without systematic drilling and blasting; (3) concrete or masonry structures which have been abandoned; and (4) conglomerate deposits which are so firmly cemented that they possess the characteristics of rock