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Response to Comments Table <br /> California Army National Guard <br /> Stockton, California <br /> (Page 5 of 7) <br /> Comment Comment from <br /> Number Central Valley Regional Water Quality Control Board Letter Response <br /> dated March 15, 1999 <br /> 5 Inspection of the potential buried drum area in the northeastern Page 10, 2nd bullet <br /> quadrant of the facility, revealed that this area is currently used for A geophysical survey is proposed in the area of <br /> vehicle and equipment storage. We concur that as an initial step a concern to assess the presence or absence of <br /> geophysical survey of this area should be performed to determine the reportedly buried tear gas canisters. The <br /> presence or absence of buried drums. The revised Work Plan should geophysical survey will utilize ground <br /> include discussion of which geophysical methods will be used for the penetrating radar to obtain a subsurface picture <br /> investigation and which specific areas that will be investigated. of the 150 foot by 150 foot area of concern. <br /> Based on the geophysical survey, additional actions may be <br /> necessary to address this area of concern. <br /> 6 The Work Plan indicates that the contents of the clarifiers in the Page 10, 3`d bullet <br /> OMS and CSMS will be sampled. The revised Work Plan should Versar has not proposed to sample the contents <br /> include a sampling and analysis plan for the contents of these of the clarifiers; however we are proposing to <br /> clarifiers. oversee the removal of the clarifier contents to <br /> assess the condition and details (i.e. discharge <br /> point) of the clarifiers at the OMS and CSMS. <br /> Versar will also attempt to obtain available <br /> laboratory analytical results from previous <br /> clarifier sampling conducted by CA ARNG <br /> personnel and provide the results in the site <br /> investigation report. <br /> 1527-99/3134-100/AUG 13'99 <br />