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0 0 <br /> DDJC-Tracy Installation Restoration Program (IRP) <br /> DDJC-Tracy established its IRP in 1980. Priorto the mid-1970s, most In 1980, DDJC-Tracy began a groundwater sampling and monitoring <br /> waste at DDJC-Tracy was disposed of on site, in accordance with program. When chemicals of concern were found at concentrations <br /> standard industrial practices commonly used at that time. These exceeding state action levels,DDJC-Tracy established acomprehensive <br /> included burning,discharge,soil percolationand burial. program of site investigations and remedial actions. The installation <br /> was added to the U.S.EPA's National Priorities List(NPL)in 1991,and a <br /> Chemicals of Concern Federal Facilities Agreement was signed in June of 1991. <br /> DDJC-Tracy has been proactive and implemented remedial The DDJC-Tracy IRP has focused on the active investigation of areas of <br /> systems to eliminate the presence of the following volatile potential groundwater and soil contamination, the extraction and <br /> treatment of groundwater contaminant plumes,and the excavation and <br /> organic compounds(VOCs)from the groundwater,soil,and soil disposal of contaminated soils associated with underground fuel <br /> vapor. storage tanks and former waste disposal sites. <br /> Tetrachloroethene(PCE) — PCE is a colorless liquid that is <br /> used to degrease and clean metals and thin and remove paint. <br /> PCE is commonly found in cleaning solvents. In accordance Currently, DDJC-Tracy operates one groundwater treatment plant to <br /> with past standard industrial practices, DD1C Tracy used address the contamination of groundwater in and around the <br /> nstallation.The treatment plant is on the DDJC-Tracy Annex property. <br /> cleaning solvents containing PCE to clean and remove paint <br /> from military hardware and industrial equipment. During the past few years,contaminated soil at DDJC-Tracy has been <br /> Trichloroethene (TCE)— TCE is a clear and colorless liquid excavated, removed, and disposed off-site in a permitted hazardous <br /> that is used to degrease and clean metal and electronic parts waste disposal facility. <br /> and to dilute paints. TCE is commonly found in household Forthe TCEthat remains in the soil,DDJC-Tracy uses a technique called <br /> cleaning products and paint remover. In accordance with soil vapor extraction(SVE)to remove and vaporize the TCE,then collect <br /> standard industrial practices of the past, DDJC-Tracy used the harmful chemicals in carbon filters. Currently,three SVE systems <br /> cleaning and degreasing solvents containing TCE to clean and are operatingatthe installation. <br /> remove paintfrom military hardware and industrial equipment. <br /> Dieldrin — Dieldrin,producedfromthe 1950stothe 1980s,is Overall, DDJC Tracy has implemented multiple remedial actions to <br /> an agricultural insecticide used to control and/or eradicate cleanup contaminated groundwater and contaminated soil and soil <br /> insects believed to be carrying harmful diseases. The use of vapor. Remedial actions include:groundwater monitoring,extraction, <br /> ,the <br /> andtreatment,soil vaporextraction andtreatment,soilandsolid waste <br /> dieldrin is no longer legal in the United States. Currently, removal, and institutional controls that identify allowed uses in and <br /> source of the dieldrin plume is unknown, butdata suggestthat around identifiedsites. ■ <br /> the plume is a result of past agricultural spraying performed <br /> around the installation's boundary. <br /> sioP7.11Awd <br /> t <br /> 001�1 <br /> 1anp° <br /> �\ ��° <br /> .V51apPsloSl • 0om <br /> w O � <br /> MMMIMME30 °�t <br /> IM EM iffy[. M O C <br /> 2 <br />