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C-SHADRIFS.6/SEWER.9 <br /> 06/08/90 <br /> �I <br /> i <br /> 'I Area 10 At the northwest comer of Bldg. 635 between <br /> catch basins 6-55 and 6-56. Infiltration of <br /> wastes from aircraft maintenance operations <br /> conducted in this building will be investigated. <br /> Additional investigations in the South Balloon <br /> Area are not warranted because an intensive <br /> soil gas survey has been performed in this <br /> area and because a groundwater treatment <br /> system is in operation. <br /> Additionally, it is recommended that two sections of French drain pipe be <br /> excavated to verify the construction details of this sewer type. <br /> INI 17 <br />