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PROPOSEINTERIM <br /> D ACTIONS AND REMOVALS <br /> PROPOSED INTERIM ACTIONS: 'Q�i�< <br /> 1 . The proposed remedial actions include: es <br /> Implementation of periodic water level measurements and water quality sampling <br /> and analysis at existing on-site monitoring wells and surface water monitoring <br /> stations. Also, a subset of strategically located piezometers and <br /> intermediate monitoring wells will be installed. The monitoring wells and <br /> surface water monitoring stations sampling results will be used to confirm or <br /> document changes in past water quality results. Results will also be used to <br /> determine the depth at which groundwater is no longer controlled by the <br /> surface drainage system. <br /> As previously noted in the NAVCOMMSTA Stockton 21 April 89 letter to your <br /> office, laboratory results for surface water samples taken at the discharge to <br /> the Burns Cut-off area (March 1989) indicated that there were not any <br /> detectable levels of contaminants present. <br /> 2. Monitoring wells will also be installed around the periphery of the <br /> activity. The periphery wells will provide an indicator as to whether or not <br /> contamination is migrating off-site. <br /> PROPOSED REMOVALS: <br /> 1 . Removal actions per the Comprehensive Environmental Restoration <br /> Compensation and Liability Act (CERCLA) are proposed at several of the <br /> Installation Restoration (IR) Site 5 locations. Refer to the ERM-West report <br /> dated August 1989, which was provided to your office for review in September <br /> 1989. <br /> The proposed removals include: <br /> AREA A: The sump contents will be removed. <br /> AREA B: The tank will be emptied and removed during first quarter of FY90 <br /> (leftover FY89 funds were available for this) , followed by removal of <br /> contaminated soils (based on availability of FY90 funds) . <br /> AREA C: The locomotive pit will be cleaned and contaminated sediments from <br /> sediment traps will be removed. <br /> AREA E: Sludge in both the Imhoff tank and the effluent vault will be removed. <br /> AREA F: The sludge and contaminated soil will be removed. <br /> AREA H: The pesticide storage building will be demolished and removed. <br /> Contaminated surface soils will also be removed. <br /> AREA J: The contents of sumps will be removed. <br />