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Ms. Carol Oz December 7 , 1990 <br /> San Joaquin County <br /> Public Health <br /> Page 2 <br /> vacuum truck. When the sludge and other debris have <br /> been removed and the LEL reading is 0, the washing will <br /> cease. All interior rinse water and sludge, if <br /> hazardous, will be manifested and transported by and to <br /> Ramos Oil Company in West Sacramento. <br /> Semco, in Modesto, will be responsible for hauling and <br /> disposing of the removed underground storage tanks. <br /> 9 . If it is safe to enter the tank excavation, soil samples <br /> will be collected with a core or trowel. If the <br /> excavation is deemed to be unsafe for entry of sampling <br /> personnel, samples will be obtained from a backhoe <br /> bucket. Soil samples will be taken from soil located one <br /> to two feet below the bottom of the excavation. At least <br /> two (2) soil samples, one from either end of the tank, <br /> shall be taken if the tank in question is suspected of <br /> having leaked. <br /> 10. As you mentioned to me during our telephone conversation, <br /> I will sign the County Soil Sample Analysis Requirement <br /> Sheets that have been inserted into the three (3) sets <br /> of plans that you currently have. <br /> I trust that this information will suffice for you to <br /> final the closure plan and have it approved. I also understand <br /> that this will not interfere with your processing of the <br /> underground tank installation plans for the new tanks to be <br /> installed at this site. <br /> Thank you very much for your assistance with this <br /> project. If you have any more questions please feel free to call <br /> me at (916) 348-3057 . <br /> Respectfully, , A <br /> 4). <br /> Frances W.W. Hedrick <br /> Project Manager <br /> FWH/tr <br /> enc: As noted <br /> cc: Mr. Chase Jiannalone, Atlantic Richfield Company <br /> Mr. Tom Wray, Atlantic Richfield Company <br /> Mr. Reed Stephens, Reed Stephens Construction <br /> Mr. Kyle Christie, Atlantic Richfield Company <br /> Ms. Eloise Fricke, Applied Geosystems <br />