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bbNf bY:LLNL 8— 3-94 5:37PM 5104222470-1 812094640138;# 1 <br /> Lawrence Livenwre National Labsry <br /> August 3, 1994 <br /> 0 <br /> Ms. Diane Hinson <br /> Public Health Services of San Joaquin County AUG 01 1994 <br /> Environnunental Health Division <br /> P.O.Box 2009 c-'NVIRONMENTAi.-HEALTH <br /> Stockton,Ca 95201 PERMIT/SERVICES <br /> SUBJECT, Building 871 Underground Storage Tank 871-DI-LJI <br /> Proposal for Corrective Action <br /> On July 26, 1994, the 200&-gallon.steel underground diesel fuel tank 87'1-D11:1 at <br /> Lawrence Livermore National Laboratory Site 300 Building 871 was removed from the <br /> ground and shipped off-site as hazardous waste. Bill Snavely of the San Joaquin <br /> County Environmental Health Division was present to witness closure activities and <br /> the collection of soil samples. After removing the tank and the fill gravel we became <br /> aware that the underlying sandstone smelled of diesel fuel. An Unauthorized Release <br /> Repdrt was completed and both FAXed and mailed to your office on August 2, 1994. <br /> Restilts of analyses of the two soil (crushed sandstone) sample5 collected from the <br /> bott0m of the excavation show 2500 mg/kg and 3000 mg/kg TPH-D values, and BT)M <br /> valuis ranging from ND for benzene concentrations to 0.42 mg/kg for one of the <br /> xyle6e concentrations. The final report of results of these analyses has been FAXed <br /> and (nailed to your office today,August'3, 1994. <br /> Based on the results of analyses of the soil samples collected within the excavation, it <br /> is oi# understanding that the site project is being transferred to you in the San Joaquin <br /> Comity Site Mitigation / Local Oversight Program. Yesterday, August 2, 1994,Rick <br /> Henry discussed with you the Building 871 tank closure project and also the Building <br /> &34 Onk closure project. Based on your agreement with him,we are FAX:hg for your <br /> irnmOdiate review descriptions of the agreements reached regarding these two <br /> projects. We will provide a formal report upon completion of the project. Dur action <br /> plan for tank 871-DIU1, as discussed in your August Z 1994, conversation with Rick <br /> Henry is as follows. The plan of action for the Building 834 tank closure site will be <br /> submitted separately. <br /> We will perform excavation at the bottom of the existing excavation to remove <br /> additional diesel fuel contaminated sandstone. The size of the eventual excavation <br /> will be determined by the proximity of Building 871,the hardness of the sandstone, <br /> and the reach of the excavation equipment. You will be invited to be present to <br /> witneIss the iftW portion of the excavation activity and the collection of soil (crushed <br /> san&qtone) samples from the bottom of the resulting excavation, <br /> An Zqiw OA-fftg*ErnpAp)w-a-wxmy of 0&#kmffl.F-C&AK&MLAW—M.0A P4551V"*r9kphawX10)4;P-1J00'T*X1?1N3S"=LGLLLLVMF1 <br />