U.S. EPA Contaminated Site Cleanup Information (CLU-IN)

U.S. Environmental Protection Agency
U.S. EPA Technology Innovation and Field Services Division
Pemaco Superfund Site, Maywood, CA
Superfund NPL

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Integrated Electrical Controls
Integrated DC/AC
Disconnect System
Combined Energy Demand

Cleanup Objectives: Remove trichlorothene (TCE) from soil and ground water at a 1.14-acre site of past chemical blending operations

Green Remediation Strategy: Employ renewable energy to generate electricity for energy-intensive in situ and ex situ treatment technologies

  • Installed a 3.4 kWphotovoltaic (PV) system in 2007 to help meet total electricity demands of (1) a high-vacuum dual-phase extraction system that removes TCE from perched ground water and upper vadose soil, and (2) an electrical resistance heating system that removes TCE from lower vadose soil and exposition ground water


  • Uses a renewable energy source to generate over 5,900 kWh of electricity each year, averaging approximately 520 kWh per month
  • Produces an amount of electricity over nine months that is equivalent to one month of total electricity purchased from the utility (at a cost of $12,000)
  • Offsets approximately 3.3 tons of CO2 each year , which is equivalent to driving a car 7,600 miles annually
  • Took advantage of a $9,000 state-sponsored rebate that reduced the solar/inverter system capital cost to approximately $30,000

Property End Use: Riverfront park integration

Point of Contact: Rose Marie Caraway, U.S. EPA Region 9

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