| Abstract |
The 485-acre Sacramento Army Depot (SAAD) is a U.S. Army support, service, and storage facility located approximately 7 miles southeast of the City of Sacramento, California. Land use in the area is predominantly commercial and light industrial, with residential areas located mainly to the west. An estimated 56,000 people obtain water from a deep aquifer that is not considered to be contaminated by the facility. However, some wells in the surrounding area draw water from the upper aquifers. Past and present activities conducted at SAAD include electro-optics equipment repair, the emergency manufacture of parts, shelter repair, and metal treating. The primary waste-generating activities included metal-plating and painting. The selected remedial action for this site includes constructing and installing an onsite soil vapor extraction system to remove VOCs from contaminated soil; dehumidifying the air stream and treating the collected water vapor using UV/hydrogen peroxide; treating air emissions using granular activated carbon and transporting the residual carbon offsite for recycling and treatment; monitoring air emissions during the treatment process; and sampling media after 6 months to determine compliance with clean-up standards. The estimated present worth cost for the selected remedial action is $614,414. No O&M costs are associated with the selected remedial action. |
