BOMARC Site RW-01 is a 75-acre (30 ha) fenced-off site contaminated primarily with "weapons-grade plutonium (WGP), highly-enriched and depleted uranium." On 7 June 1960 an explosion in a CIM-10 Bomarc missile fuel tank caused the accident and subsequent contamination. The explosion occurred at Launcher Shelter 204, McGuire AFB, Ocean County, New Jersey, approximately 16.1 miles (25.9 km) south-southeast of Trenton, New Jersey. Launcher Shelter 204 was one of fifty-four located at McGuire AFB, operated by the 46th Air Defense Missile Squadron.