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INFORMATION SHEET ORDER NO. R5-2008-0148 <br /> LAWRENCE LIVERMORE NATIONAL SECURITY, LLC AND <br /> THE U.S. DEPARTMENT OF ENERGY FOR <br /> LAWRENCE LIVERMORE NATIONAL LABORATORY SITE 300 <br /> SAN JOAQUIN AND ALAMEDA COUNTIES <br /> Groundwater monitoring of wells near these septic systems has shown evidence <br /> of elevated nitrate concentrations that cannot be explained by CERCLA sources. <br /> Low Threat Discharges <br /> The discharger conducts a variety of activities at Site 300 that may result in low <br /> volume and low-threat discharges. Consistent with the Storm Water Pollution <br /> Prevention Program, the discharger has implemented Best Management <br /> Practices (BMPs) to prevent these discharges from reaching surface water <br /> drainage courses, thus these discharges percolate into the ground. The <br /> discharges detailed in Attachment 4 are primarily composed of potable water, low <br /> conductivity water, condensate, and uncontaminated contained rainwater. These <br /> discharges may occur at any of the facilities and outdoor areas at Site 300. <br /> The Discharger evaluated the low threat discharges in a technical report <br /> submitted in 1994. These discharges did not contain any constituents that would <br /> negatively affect groundwater and are discharged in very low volumes. The <br /> discharge quality and quantity have not changed significantly since 1994 and <br /> therefore are continued to be considered as low threat. <br /> Reporting Requirements <br /> The Discharger is to submit to the Regional Water Board semi-annual and <br /> annual monitoring reports as required in MRP No. R5-2008-0148. <br />