Laserfiche WebLink
a <br /> i <br /> Site Investigation- U.S. Naval Commnunications Station <br /> CIWMB Site No. - 39-AA-0006 Page 2 of 6 <br /> demolition,, commercial-residential waste from station offices and <br /> housing, industrial wastes including solvents and paints, and <br /> hazardous wastes. Suspected or known hazardous wastes included <br /> petroleum products and pesticides . It was indicated that disposal <br /> trenches were constructed to the depth of groundwater (= 12-15' ) and <br /> that all types of waste mentioned above were co-mingled during <br /> disposal activities . Information regarding specific trench depth <br /> and location was not recorded. <br /> A review of CIWMB records indicates that the owner/ operator (U.S. <br /> Naval Communication Station) applied to the LEA for a Solid Waste <br /> Facilities Permit (SWFP) on 8/4/77 . RWQCB 'correspondence dated <br /> 5/23/78 stated in part that "the subject site does not qualify as <br /> a Class II disposal site and leachate from Group 2 wastes threatens <br /> degradation of ground and surface water quality. " LEA <br /> correspondence of 1/24/79 reports that "because of concerns of <br /> ponded water standing within the site and water quality degradation <br /> due to potential leachate development in close proximity to the <br /> recognized high ground-water table, a final solid waste facilities <br /> permit has not been issued. . .Until such time the Regional Board <br /> approves by condition of waste discharge requirements or . condemns <br /> the operation based on existing circumstances, the District shall <br /> remain in limbo as to the issuance of a ' solid waste facilities <br /> permit . " Disposal activities stopped shortly thereafter, either in <br /> late 1979 or early 1980. <br /> On the day of the multi-agency investigation, 4/19/93 , CIWMB staff <br /> observed topography that indicates former disposal activities had <br /> occurred in a somewhat random fashion on the western portion of <br /> Rough & Ready Island. CIWMB staff estimate that approximately 50- <br /> 60 acres may be so involved. Staff observed irregularly shaped <br /> berms and uneven grading over much of the involved acreage. <br /> Standing water was observed in trenches used for the Island' s water <br /> collection/extraction system. Reportedly, disposal trenches were <br /> excavated to groundwater depth, thus placing waste in contact with <br /> water. <br /> Staff walked an �5 acre portion of the site located about 150 yards <br /> due south of the duck pond (see attached map) . A portion of this <br /> area is currently used for stockpiling landscaping and wood waste. <br /> Several earthen berms in this area contained exposed metals, <br /> asphalt, and concrete pieces.. Exposed metals were observed along <br /> and contacting water within a water collection/extraction trench. <br /> Using a Combustible Gas Indicator (CGI) , CIWMB staff monitored <br /> several holes and cracks in and around the berms for the presence <br /> of methane. No (0 ppm) methane was detected in this area. <br /> A .Site Investigation Document with information regarding trench <br /> location/depth, waste types, and groundwater analysis is <br /> anticipated to be completed in mid May 1993 . Pursuant to PRC <br />