Soil 12 borings to collect samples and install groundwater observation wells.

Excavation work to prepare site for sheeting and shoring work --permitted separately. The site is an existing parking lot with associated lighting located along tingey street, se and 3rd street, se with the dc water pumping station facility to the west and the water street park to the south. The site is not currently served by water, sanitary sewer, gas, or telecommunication facilities.

Sheeting and shoring for a new 11 story multi family mixed use residential building.

A griffin hollow stem auger drill rig will install up twenty four gravel pack wells by advancing a 12. 25 id hollow stem auger from existing grade to a depth of feet or refusal. All drill cutting and investigating derived wastes from potentially contaminated sites shall be placed in a covered container and laboratory tested for offsite disposal by contractor. Into each well will be installed a 2 hp turbine submersible pump with discharge riser, power cord and lift cable to the surface. At the well head, a throttle valve and check valve will be installed on the effluent line, for each well will be directed through a common manifold to a baffled settling tank located at a location as directed by dc water or ddoe