SBCT Final EIS - Govsupport.us

Chapter 3 ⎯ Affected Environment3.2.8.1 Fort RichardsonAmmunition, Live-Fire, and UXOThe ERF impact area is off limits to unauthorized personnel. In addition, the impact area is postedwith warning signs indicating the potential risks of unexploded ordnance on the impact area.Petroleum, Oils, Lubricants and Storage TanksFRA has 22 ASTs with capacities ranging from 300 to 50,000 gallons. All of these tanks are locatedwithin the cantonment area and contain diesel fuel, gasoline, aviation fuels (JP–8), and heating oil.Twenty-one of the tanks are double-walled. The exception is the 50,000-gallon tank located at thepower plant, which is single-walled but contained within a secondary earthen dike.The smaller, double-walled tanks are monitored and visually inspected on an annual basis, and the50,000-gallon tank undergoes a monthly visual inspection. The total fuel capacity stored at FRA doesnot exceed 420,000 gallons, so an Oil Discharge Prevention and Contingency Plan is not required.However, FRA has a SPCC Plan that details spill response and prevention measures for all fuel storageareas.Forty-two USTs are located on FRA. These tanks were inspected in 2002. Only a few of these storagetanks are located outside of the main cantonment area, but these are associated with activities on BryantArmy Airfield, Camp Carrol, and Camp Denali, all of which are National Guard facilities locatedwithin the confines of FRA. All of the underground storage tanks conform to the applicable Army,State of Alaska, and USEPA guidelines. These tanks are monitored monthly, and are equipped withelectronic monitoring devices designed to detect leaks and overfills. Each is constructed of doublewalledsteel and protected from rust and corrosion.Contaminated and IRP SitesGroundwater and soil on some parts of FRA have been impacted by contaminant releases from a varietyof sources. Maintenance operations in motor pools, aircraft hangars, and other industrial operationsgenerate most of the hazardous waste on the post. Major sources of contaminants include releasesof petroleum products, chlorinated solvents, white phosphorus, and PCBs.The Army has investigated and conducted cleanup operations at 114 sites on FRA. Contamination at65 of these sites was related to spills or leaks from underground storage tanks. Seventeen of thesesites were grouped into five operable units (investigated as one action) under Superfund authority.RODs have been signed for four of the operable units (A, B, C, and D) and the remedial investigationfor Operable Unit E began in 2002.Areas impacted by contamination include the ERF Impact Area (an estuary contaminated with whitephosphorus), Poleline Road Chemical Disposal Area (buried chemical agent identification sets and releaseof chlorinated solvents), former fire training areas, fuel storage facilities, disposal areas, andformer PCB storage sites. All known or suspected major sources of contamination are located in eitherremote, unpopulated areas of FRA or in industrial operations areas. No off-site migration by anycontaminant of concern has been detected.As of 2004, the Army was conducting ongoing cleanup operations at 13 sites. All of the currently activesites, as well as 27 closed sites, are controlled to prohibit excavation of soil or use of groundwater.These institutional controls are implemented to manage access to the sites. The controls were establishedbecause contamination exceeded requirements for clean closure of the sites after remedia-February 2008 3–119 2/25th SBCT Final EIS