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� <br /> W -Appendix A_,, Site Background Information.._. <br /> Former Stockton Plating Facility <br />' Page 7 of 7 <br />' An electrical control panel was installed adjacent the process tank and pump Electrical wiring from <br /> the ground water extraction pumps, process pump and holding tank float controls were connected <br /> to the electrical control panel Pump controls are supplied by a pressurized air line for the pump <br /> icontrols From the process pump, 1-inch diameter PVC tubing (schedule 40) was routed to a 5- <br /> gallon suspended solids filter chamber equipped with 25-micron replaceable blown-fabric sediment <br /> filter bags From the filter chamber, schedule 40 PVC tubing was routed to the two 2,000 pound <br />' vessels containing GAC The GAC media vessels are designed to adsorb hydrocarbons compounds <br /> Brass sampling ports were Installed at the Influent, between the media vessels and at the effluent to <br /> allow sampling for detection of potential media break through and to obtain final discharge samples <br />' - The ground water pump and treat system layout is depicted In Figures 3 <br /> A battery operated, F-2000 (model RT) Blue-White Industries flow meter was installed on the <br />' effluent line to continuously measure and display the effluent flow rate and to continuously measure <br /> and display the total flow The flow meter is designed to operate between 6 and 20 gallons per <br /> minute A Lower Explosive Level(LEL)meter was Installed on the groundwater effluent at the site <br />' The ground water treatment system is enclosed within a chain-link fence on the east side of the site <br /> A dedicated, 2-inch diameter PVC discharge pipeline was constructed from the treatment system <br /> ato a sewer drain located at the eastern edge of the site Waste water is discharged to the City of <br /> Stockton sewer system under permit The discharge piping system layout Is depicted in Figure 3 <br /> • <br /> Advanced GeoEnvironmental,Inc <br /> 1 <br />