Superfund Record of Decision (EPA Region 9): Watkins-Johnson (Stewart Division), Scotts Valley, California (first remedial action), Final report, June 29, 1990

Technical Report · Fri Jun 29 00:00:00 EDT 1990

OSTI ID:5477564

The Watkins-Johnson site is an active research and development, manufacturing, and industrial complex in Santa Cruz County, five miles north of Santa Cruz, California. The Watkins-Johnson Company has owned and operated the complex since 1963, conducting such activities as: metal machining, degreasing, metal plating, and photo laboratory activities. During these activities, a variety of organics, inorganics and metals were used. The primary contaminants of concern affecting the soil and ground water are VOCs including PCE and TCE, and metals including silver. The selected remedial action for the site includes soil vapor (vacuum) extraction with pretreatment of extracted vapors using GAC prior to ambient discharge; capping and grading contaminated soil areas to minimize the potential for mobilization of soil contaminants to the ground water; installing infiltration leachfields to prevent offsite migration of ground water contaminants in the perched zone; installing gravity drains to transfer the contaminated ground water from the perched zone to the regional aquifer zone for subsequent extraction; ground water pumping and onsite treatment to remove contamination from both the perched and regional zones using GAC adsorption with offsite regeneration of spent carbon. The estimated present worth cost for this remedial action is $2,156,243, which includes an estimated annual O and M cost of $167,820.

• Research Organization: Environmental Protection Agency, Washington, DC (United States). Office of Emergency and Remedial Response
• OSTI ID: 5477564
• Report Number(s): PB-91-921411/XAB; EPA/ROD/R-09-90/046
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
29 ENERGY PLANNING
POLICY AND ECONOMY
CALIFORNIA
POLLUTION
GROUND WATER
CONTAMINATION
SOILS
AQUIFERS
COST
ECOLOGICAL CONCENTRATION
HAZARDOUS MATERIALS
INDUSTRIAL WASTES
LAND POLLUTION
METALS
MONITORING
ORGANIC COMPOUNDS
POLLUTION CONTROL
REMEDIAL ACTION
SITE SURVEYS
SUPERFUND
VOLATILE MATTER
WASTE DISPOSAL
WATER POLLUTION
CONTROL
DEVELOPED COUNTRIES
ELEMENTS
FEDERAL REGION IX
HYDROGEN COMPOUNDS
LAWS
MANAGEMENT
MATERIALS
MATTER
NORTH AMERICA
OXYGEN COMPOUNDS
POLLUTION LAWS
USA
WASTE MANAGEMENT
WASTES
WATER
540320* - Environment
Aquatic- Chemicals Monitoring & Transport- (1990-)
540220 - Environment
Terrestrial- Chemicals Monitoring & Transport- (1990-)
290300 - Energy Planning & Policy- Environment
Health
& Safety