Sustainable Group, Inc.

Scope Of Work

The Point Arena Lighthouse Area is located on the Pacific Coast of California approximately 130 miles North of San Francisco. The Lighthouse Facility consists of the Lighthouse (originally constructed in 1870 and reconstructed in 1908 after a devastating earthquake), several outbuildings, six housing quarters available for rent, a helicopter pad with adjacent storage building, and a 4,000 gallon above ground storage tank. According to the Government provided scope of work for this project, it was reported that 40 -50 gallons of JP-8 jet fuel were released from a damaged gasket on top of the tank. The fuel appears to have flowed down the tank on multiple sides, including into a small area between the tank and the adjacent storage building. This project required the excavation of the impacted material followed by clearance testing by a Mendocino County representative who was on site with a Photo Ionization Detector (PID) corrected to JP-8 Fuel. Lab samples were also taken from the excavation side walls, end walls and bottoms as well as from the removed material that was placed in covered and lined bins. Lab results for these samples ranged from non-detect to a value of 410 ug/kg or 0.410 ppm for Naphthalene taken from 1’ below grade beneath the above ground storage tank pad. These levels are still well below any reportable quantity and thus, the response objectives were met with no further action required. The excavated area was then filled with Controlled Density Fill (CDF) and covered with native top soil to encourage native vegetation growth.