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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2008-0148 -17- LAWRENCE LIVERMORE NATIONAL SECURITY, LLC AND THE U.S. DEPARTMENT OF ENERGY FOR LAWRENCE LIVERMORE NATIONAL LABORATORY SITE 300 SAN JOAQUIN AND ALAMEDA COUNTIES ranging from drips of condensate to one time 5,000-gallon discharges of water that percolate into the ground. (see Attachment 4) 72.The Discharger has obtained coverage under the Central Valley General Order No. 5-00-175, NPDES Permit CAG995001 the General Order for Dewatering and Other Low Threat Discharges to Surface Waters, for large volume potable water discharges that have the potential to reach surface waters. BASIN PLAN, BENEFICIAL USES, AND REGULATORY CONSIDERATIONS 73.The Water Quality Control Plan for the Sacramento River and San Joaquin River Basins, Fourth Edition, (hereafter Basin Plan) designates beneficial uses, establishes water quality objectives, contains implementation plans and policies for protecting waters of the basin, and incorporates by reference plans and policies adopted by the State Water Resources Control Board (State Water Board). Pursuant to Section 13263(a) of the California Water Code, waste discharge requirements must implement the Basin Plan. 74.The Basin Plan designates the beneficial uses of ground water underlying Site 300 as municipal and domestic, agricultural, and industrial supply. 75.The Basin Plan establishes numerical and narrative water quality objectives for surface and groundwater within the basin, and recognizes that water quality objectives are achieved primarily through the Regional Water Board's adoption of waste discharge requirements and enforcement orders. Where numerical water quality objectives are listed, these are limits necessary for the reasonable protection of beneficial uses of the water. Where compliance with narrative water quality objectives is required, the Regional Water Board will, on a case-by-case basis, adopt numerical limitations in orders, which will implement the narrative objectives to protect beneficial uses of the waters of the state. 76.The Basin Plan identifies numerical water quality objectives for waters designated as municipal supply. These are the MCLs specified in the following provisions of Title 22, California Code of Regulations.. Tables 64431- A (Inorganic Chemicals) and 64431-B (Fluoride) of Section 64431 , Table 64444-A (Organic Chemicals) of Section 64444, and Table 64449-A (Secondary MCIs-Consumer Acceptance Limits) of Section 64449. The Basin Plan's incorporation of these provisions by reference is prospective, and includes future changes to the incorporated provisions as the changes take effect. The Basin Plan recognizes that the Regional Water Board may