Project Profile: UOSA Carbon Storage/Digester Repairs Basic Information Owner: Upper Occoquan Service Authority Engineer: CH2M Hill Approximate Contract Value: $2,700,000 Completion Date: July 2007 Project Type: Wastewater Treatment Plant Upgrade Testimonials "Throughout the project, there was a strong sense of teamwork between UOSA and [American Contracting] that enabled us to work through the usual hurdles as they surfaced and jointly decide on the right course of action that was fair to both parties." read more...  - Executive Director, Upper Occoquan Sewage Authority   "As a result of their good performance, W.M. Schlosser requested and was granted permission by UOSA to use [American Contracting] as a mechanical subcontractor on a construction project that they were working on for UOSA." read more...  - Project Manager, CH2M Hill Click on a testimonial to view a readable version. Project Description American Contracting furnished and installed two new granular activated carbon regeneration tanks. The tanks were installed inside an existing operational building. The work included removal of an existing 50’ tall, 16’ diameter tank and removal of a portion of the roof. Additionally, we installed 6” and 8” diameter DIP to connect the tanks to the existing regeneration system and installed an 8” buried water line to feed the system. Project highlights include: Rigging and setting two 60’ tall, 14’ diameter carbon steel tanks into an existing building using both a 350 ton and 70 ton crane in a double crane pick Structural steel modifications to an occupied building Installing 6” and 8” DIP up to 60’ above floor levels Installation of 5 new structural platforms with grating and handrail Site, mechanical, and structural demolition Installation of an 800 SF dome skylight Modifications to existing electrical, fire sprinkler, and fire alarm systems Integration with plant control system