| Abstract |
The 1.5-acre Synertek (Building 1) site is a former semiconductor products manufacturing facility in Santa Clara, Santa Clara County, California. The major site feature is a 24,000 square foot building (Building 1). The site is comprised of both onsite and offsite components. The onsite component includes the area within the Synertek property boundaries surrounding Building 1, and the offsite component includes the area contaminated by a ground water plume that has migrated north past the property boundaries and into the adjacent industrial park. The site overlies three shallow aquifer zones, and a deep aquifer zone that provides up to 50% of the municipal drinking water for the Santa Clara Valley residences. Historical ground water use in the area includes private water-supply wells for homes and agriculture prior to the construction of public water connections and municipal water supply wells. The Record of Decision (ROD) addresses only contaminated ground water since the contaminated soil and structures were removed previously. The primary contaminants of concern affecting the ground water are VOCs including TCE, vinyl chloride, 1,1-DCE, cis-1,2-DCE TCA, and 1,1-DCA. The selected remedial action for the site includes continuing operation of the existing ground water extraction and air stripping treatment system; discharging the treated effluent to an onsite storm drain; controlling air emissions by carbon adsorption, conduct a pilot injection study to evaluate if the reinjection of treated water would enhance the removal of pollutants, speed ground water cleanup, and reduce ground water discharge to the surface. |
