This is the installation of a StormTech SC-740 Chamber system for Magnolia High School in the Anaheim Union High School District. It is for subsurface stormwater management. It consist with a 50ft. X 200ft. X 12ft. deep excavation. A layer Geotextile fabric, a layer of 2″ rock, installation of chambers, another layer of 2″ rock and enveloped in another layer of Geotextile fabric. Completely covered and compacted in soil. (2) catch basins tied into each end and tied into the storm drain of the school site.