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MgO2 filter socks will release oxygen to the environment !(gm a dwater) as it is chemically <br /> converted to magnesium hydroxide Mg(OH)2. The following equation shows the chemical , <br /> I <br /> r transformation: <br /> MgO, + H2O -4 1/2 02 + Mg(OHj� <br /> f ! : <br /> As the MgO2 is exposed to moisture, the filter sock solidifies as;it converts to magnesium 5 <br /> hydroxide. The life expectancy of the MgO2 in the filter socks i; expected to be t <br /> approximately six months. j h <br /> The ORC* filter socks will be installed in each of the six groundwater monitoring wells at the <br /> site. Groundwater in each of the wells will be monitored for key parameters for a period of <br /> twelve months following initial installation of the filter socks. Section 2.0 describes in detail, <br /> the installation of the filter socks, and sampling of the groundwater. The effectiveness of the <br /> filter socks as a remedial alternative will then be evaluated. <br /> �r <br /> 2.4 Site Act VMOS � � <br /> i <br /> The site activities will include the installation of the filter socks in each of the groundwater <br /> monitoring wells at the site, and periodic monitoring of the groundwater to evaluate the <br /> effectiveness of the filter socks on the TPH as diesel concentrations measured at the site. <br /> Results from the periodic monitoring will be reported in the quarterly monitoring reports. <br /> Following completion of the monitoring, the results will be evaluated and summarized in a <br /> final effectiveness evaluation report. 1 ; <br /> 'i <br /> i <br /> 2.1 Preconstruction Submittals <br /> Prior to the initiation of field activities, thislan will be approved Y Bergh roved b Van den Ber h Foods <br /> P <br /> and San Joaquin County Public Health Services, Environmental Health Division (PHS/EHD) <br /> representatives. Any necessary deviations from the approved plan will be approved by Van <br /> den Bergh Foods and County representatives prior to implementation. rT will notify the <br /> County at least 48 hours prior to the implementation of the field,work. <br /> 2.2 Field Activities <br /> f I! 1 <br /> The planned field activities are described below and will uiclude."•"• <br /> M7407-10-96/VDBFI96-0017 3 �x <br />