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INFORMATION SHEET ORDER NO. R5-2008-0148 LAWRENCE LIVERMORE NATIONAL SECURITY, LLC AND THE U.S. DEPARTMENT OF ENERGY FOR LAWRENCE LIVERMORE NATIONAL LABORATORY SITE 300 SAN JOAQUIN AND ALAMEDA COUNTIES Lawrence Livermore National Security, LLC, and the U.S. Department of Energy (hereafter jointly referred to as Discharger) operate a test facility known as the Lawrence Livermore National Laboratory Experimental Test Site (Site 300). Site 300 occupies 10.4 square miles in the Altamont Hills, approximately 6.5 miles southwest of downtown Tracy and 12 miles southeast of Livermore. The site consists of steep hills and narrow ravines with elevations that range from 500 to 1750 feet above mean sea level. The United States Government owns the property. Waste Discharge Requirements (WDR) Order No. 96-248, adopted by the Regional Water Board on 20 September 1996, prescribed requirements for: a. The discharge of domestic and mechanical equipment wastewater to sewage evaporation and percolation ponds (collectively referred to as sewage ponds). b. The discharge of mechanical equipment wastewater to percolation pits. c. Discharges to Class II surface impoundments that were used for disposal of explosives processing wastewater and photographic rinse water. The Discharger submitted a Report of Waste Discharge (RWD), dated 19 July 2000, to amend WDR Order No. 96-248 to include: a. Discharges to the sewage ponds. b. Mechanical equipment wastewater to percolation pits. c. Cooling tower blowdown and discharges associated with cooling tower maintenance to percolation pits. d. Domestic and mechanical equipment wastewater discharges to septic tanks, leach fields, cesspools. e. Low threat discharges to ground: primarily low volumes of drinking water, condensates and uncontaminated contained rainwater that are detailed in Attachment 4. All of the discharges that will be regulated by the new order. Waste Discharge Requirements Order No. R5-2008-0148, are existing discharges that have been regulated in the past under other orders or waivers of Waste Discharge Requirements. Locations of the discharges are shown on Attachment 2. The issuance of this Order provides the Regional Water Board with a better tool to control the discharges and evaluate potential impacts to water quality. Surface water drainage is to Corral Hollow Creek, an ephemeral stream that drains east toward the San Joaquin Basin. Surface water runoff at the site occurs only after heavy rains. None of the discharges covered by this Order enter surface water drainage courses.