In accordance with our on-call service agreement with the City of Vallejo, Cal Engineering & Geology provided quality assurance testing services for a sewer rehabilitation project on Mare Island in 2011. The project consisted of new asphalt concrete pavement and slurry sealing at various sanitary sewer pump stations, installation of approximately 2000 lineal feet of 22-inch HDPE sewer main, boring and jacking of 32-inch steel casing at three locations, and preparation for the installation of five new emergency back-up generators. During the course of work, Cal Engineering & Geology attended weekly progress meetings, sampled and tested baserock materials, and performed field density testing of the placement of baserock and asphalt concrete. Field reports were delivered to the Public Works division on a timely basis, with a final quality assurance testing letter issued at the conclusion of the work. The services were provided on an as-needed, intermittent basis with 30 site visits over a two month period. This efficiency resulted in cost control that utilized only 47 percent of the estimated budget.