DESIGN BID-BUILD - P-222: DBB MQ-25 Aircraft Laydown Facilities, NSN, VA

Design bid-build - mq-25 aircraft laydown facilities. Site preparation includes utility demolition and relocation, excavation cut and fill and grading. The site is an area of manmade land and releases of contaminants to the soil and groundwater as a result of historical airfield and industrial operations. Special foundation features include deep foundation system with piles. Paving and site improvements include storm water management low impact development (LID) facilities and items, security fence relocation and expansion with lockable pedestrian gates, vehicular circulation areas, parking restriping, expanded security fencing, site cleanup and landscaping. Environmental mitigation includes sampling, staging, and offsite disposal of contaminated soil, treatment (including sampling, licensed operator, and treatment system) of contaminated groundwater and runoff during dewatering activities, disposal of groundwater treatment media, and disposal of AFFF concentrate/solution contained within the existing fire protection system of building lp48. Electrical utilities include underground electrical and communications distribution, transformer, exterior lighting, site security electrical and communications infrastructure to new support facilities. Mechanical utilities include sanitary sewer lines with storm drainage systems, natural gas service, potable water supply lines and fire protection systems. See outside link.