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WASTE DISCHARGE REQUIREMENTS ORDER NO. R5-2008-0148 4 <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 /> ATTACHMENT 22 continued <br /> Summary of Site 300 septic sstems. <br /> Depth to nearest <br /> System Septic system type Sizea Waste Estimated Estimated water bearing <br /> location streams design flow daily flow zone/Regional <br /> (Building) (gpm)b (gpd)c (Tnbs1) aquifer if <br /> different ft <br /> 895 Septic tank w/ 500g DW 23 9 No information in this <br /> 2 Leach fields 75'4" tile area <br /> 897 Cesspool DW 23 s No information in this <br /> area <br /> 899 Septic tank w/ 1500g DW 36 52 24 (Qt- Tnbsl)/220 <br /> Leach field (deep Tnbsi) <br /> a Based on best available information and records. <br /> b Estimated design flow was calculated based on the domestic waste fixture units for each type of plumbing fixture in the building <br /> in accordance with Appendix A, Recommended Rules for Sizing The Water Supply System, of 1997 Uniform Plumbing Code. <br /> The toilets and urinals predominantly use flushometer valves. <br /> Estimated daily flow was calculated based on the facility peak population using the following assumptions: <br /> 1. Each building occupant will use the restroom four times a day. Each use will consume 1.6 gallons of water per flush and 1.0 <br /> gallon of water for hand washing. <br /> 2. Each building occupant will take a 5-minute shower if there is shower facility in the building. The showerhead will deliver 2.0 <br /> gallons of water per minute. <br /> d DW= domestic waste. a ME = mechanical equipment wastewaster. f CT = cooling tower biowdown. <br /> 9 There are no assigned occupants in the building. Therefore domestic plumbing fixtures are used only by transient workers. <br /> Sewage flow is minimum. <br /> h LW = laundry wastewater. <br /> This is the change house and shower facility for process area workers, therefore the daily flow is estimated on 8 persons using <br /> the facility daily rather than the peak facility population number. <br /> There are no domestic plumbing fixtures in the building, previously Building 820, which has been demolished, was connected to <br /> this septic system. <br />