### Email Correspondence between EPA and VA DEQ

November 2010

RE: Releases related to field constructed tanks (DEQ) to : EPA Additional information on the Craney Island sites. 1) The estimated recovery to date for Tank 12 5 (PC#1994 - 0101) is about 17,000 gallons. 2) I initially told you that the plume for Tank 275 (PC#1988 - 0664) was about 8 acres, but I believe that was the estimated size for the Tank 275 and Tank 272 plumes combined. I think the more accurate estimate is 5 acres for Tank 275 and 3 acres for Tank 272. 3) I am attaching maps for each site showing the fully delineated plumes. As you will see from the dates, these were done early on and do not reflect the remediation that has been done subsequently. These plumes are substantially reduced at this time. Geologist Senior Remediation Section - Department of Environmental Quality Tidewater Regional Office Virginia Beach, Virginia 23462

__________________________________________________________________ D ate: 11/19/2010 02:13 PM Subject: Releases related to field constructed tanks Below is a quick summation of the cases I think you would be interested in. PC#1990 - 0039 Old Aviation Fuel Tank Farm - Wallops Island Flight Facility (Opened 7/11/1989)

The tank farm had different types of tanks. Three appear to have been field constructed. The product Released was Jet Fuel and Aviation Gas. The tanks, piping and 4,700 tons of soil were remo ved in 1991. The receptor of concern has been Town of Chincoteage Water Supply Wells 3A, B, and C, although 3A is no longer in use. No impact to these wellshas been verified.

In 1958, the base wells across the street shut down due to fuel products in water PC#1994 - 0101 Tank 125 - Craney Island Fuel Depot (Opened 7/11/1993)

One (1) 2.1 million gallon field constructed tank constructed in 1940's, removed from service 1993. Produ ct Released: Jet Fuel Potential Receptor: Tributary to Craney Island Creek Release may have been from the lines to and from the tank PC#1988 - 0664 Tank 275 - Craney Island Fuel Depot (Opened 5/16/1986)

One (1) 2.1 million gallon field constructed tank constructed in 1950's and removed from service in mid 1980's Product: JP - 5 Threatened receptor: Craney Island Creek - Free product found within 20 feet of Craney Isl and Creek in 1987. Release attributed to tank and/or piping failures. This may have involved more than one tank. Nearby Tank 276 also had had a 127,000 gallon overfill in 1996. Plume covers between 5 to 8 acres. Volume released estimated between 300,000 and 500,000 gallons. Estimated 143,000 gallons recovered to date. PC#2000 - 5225 Tank 272 - Craney Island Fuel Depot (Opened 5/16/2000)

One (1 ) 2.1 million gallon field constructed tank constructed in the 1950's and taken out of service in May 2000 Product: JP - 5Threatened Receptor: Craney Island Creek Release was attributed to piping failures. I nee d to check the file to see if the tank itself was ruled out. Plume covers 3 acres. Volume released estimated between 175,000 and 250,000 gallons. Estimated 107,000 gallons recovered to date. PC#2003 - 5062 Tank 174 - Norfolk Naval Shipyard (Opened 12/2/2002)

2 million gallon field constructed tank. Inactive since 1986. Product: #6 Fuel Oil Leakage from bottom and wall seams. Free product was found in nearby electrical manhole. PC#1991 - 1429 SP Fuel Farm - Norfolk Naval Station (Opened 4/11/1991; closed 1/6/2009)

Four field constructed tanks ranging from 230,000 to 565,000 gallons. These tanks operated from 1943 to 1992 and stored aviation gas. Release may have been due to fuel distribution lines. PC#1988 - 0665 - Fuel Farm - Oceana Naval Air Station (Opened 10/5/1983)

Five (5) 570,000 gallon field constructed tanks stored JP - 5 from 1955 to 1997. Release was from the tanks. Estimated 56,000 gallons recovered to date. Threatened receptor - nearby wetlands. PC#1988 - 0666 - Daytank - Oceana Naval Air Station (Opened 10/5/1983)

One (1 ) 210,000 - gallon tank storing JP - 5. The tank was relined and is still in use. There have been multiple releases at this site. At least one was traced to holes in the tank.Two other cases which may have involved field constructed tanks are:

PC#1991 - 1711 LP Fuel Farm - Norfolk Naval Station

This site is a 13 acre fuel farm with 4 field constructed tanks and 20 regular USTs. Multiple releases involved. Multiple fuel types. The field constructed tanks are still in use. I will have to review the file to determine whether the field constructed tanks were involved. Threatened receptor is Bousch Creek Culvert leading to Willoughby Bay. PC#1991 - 0436 - The Pier Areas - Norfolk Nav al Station

The CEP area has three 1.2 million gallon field constructed USTs which have been relined. I am not certain whether this release was from the tanks or the transmission lines from Craney Island. Product was NSFO and diesel. Threatened receptor is the Elizabeth River. Sheens were noted on the river at one point early on.