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CLOSURE REPORT FOR UNDERGROUND STORAGE TANK 836-D1U1 <br /> Additional native soil removed as part of a remedial effort: [ ]Yes [X]No <br /> [N/A] LLNL Hazardous Waste Requisition and Uniform Hazardous Waste Manifest"TSD <br /> Facility to Generator"copy for the soil enclosed. <br /> Volume of native soil removed: 10 cubic yards. <br /> Volume of backfill removed: 10 cubic yards. <br /> Describe how the excavated soil was handled (i.e. how and where it was stored): Prior to and <br /> upon tank removal from the excavation,approximately 20 cubic yards soil and backfill)were <br /> removed and stockpiled on and covered with visqueen (polyethylene) awaiting proper <br /> disposal or reuse. <br /> Soil or backfill returned to the tank excavation or piping trench: [ ]Yes [X]No <br /> If yes,volume of soil returned to the excavation: N/A cubic yards. <br /> Reason for the return of the soil to the tank excavation or piping trench: N/A <br /> ENVIRONMENTAL SAMPLE INFORMATION: <br /> SOIL <br /> Soil sample collection and handling procedures were in accordance with LLNL Tank <br /> Assessments and Guidance Group Procedure 203,Soil Sampling. <br /> Soil samples were collected by: Marion Heaton&Steve Trainque,LLNL Date: 3/11 &30/94 <br /> Sample analyses requested: Tank Excavation (TPH Diesel and BTXE); Stockpile TPH Diesel: <br /> BTXE; 8010/8020; Metals by STLC and TTLC; and Reactivity, Corrosivity, and Ignitability <br /> (RCI));and Buildings 827,836,and 879 tank removal stockpiles composited for gross alpha& <br /> beta, tritium, and gamma spectrometry (samples collected for disposal options). Samples <br /> collected for disposal options included A) 4 discrete samples collected for each 100 yards, <br /> and B)1 discrete sample collected for each 25 yards. <br /> • Samples collected March 11, 1994 were analyzed for TPH Diesel, BTXE, & 8010/8020, <br /> STLC, TTLC, & Reactivity, Corrosivity, and Ignitability (RCI). Samples collected on <br /> March 30,1994 were analyzed for TPH Diesel and BTXE. <br /> TPH-D:Total Petroleum Hydrocarbons as Diesel: BTXE: Benzene,Toluene.Xylenes.and Ethyl Benzene: <br /> HVOC• EPA Method 8010 for Halogenated Volatile Organic Carbons; AVOC• EPA Method 8020 for Aromatic Volatile Organic <br /> Carbons STLC: Soluble Threshold Limit Concentration; TTLC:Total Threshold Limit Concentration <br /> Name and address of analytical laboratory: California Laboratory Services, 3249 Fitzgerald <br /> Road, Rancho Cordova, CA 95742. [Radiological analyses on stockpile composite samples <br /> were performed by LLNL Environmental-Analytical Sciences Lab]. <br /> Describe how the tank excavation was secured after soil sample collection: The excavation was <br /> secured by means of yellow plastic "snow fence" and barricades equipped with flashing <br /> lights. The excavation was then filled with imported clean fill. <br /> WATER <br /> [X] Not applicable. (No water in the tank excavation or piping trench) <br /> Static water level below grade: N/A feet <br /> Describe any sheen,free product or odor present in the water: None present. <br /> Water pumped out of the excavation: [ ]Yes [X]No <br /> Volume of water removed from the tank excavation: N A gallons <br /> Water sampled: [ ]Yes [X]No <br /> Water sample was collected by: N/A Date:N/A <br /> Sample analyses requested: N/A <br /> Name and address of analytical laboratory: N/A <br /> Describe how the water was sampled: N/A <br /> Identify the source of the water(if known): N/A <br /> Describe where and how the removed water was stored on site,and type of containment used: <br /> N/A <br /> 3 <br />