work plan for soil remediation, sampling and analysis plan, site ...

OHMRemediationServices Corp. HEALTH AND SAFETY PLAN1.2 SITE DESCRIPTIONThe surface topography at Site 35 is generally flat to the south and west of the fueling area.The ground surface dips rapidly to the north and east in the direction of Brinson Creek.Surface water runoffs flows toward Brinson Creek.The shallow soil stratigraphy at Site 35 consists of fiie to medium-grainedthick), which in turn is underlain by a unit of silty sand.sands (15 to 30 feetShallow groundwater flow direction is generally west to east across the site in the direction ofBrinson Creek The top of groundwater is encountered roughly 8 to 10 feet below the groundsurface across the flat portion of the site and at lesser depths as the surface topographyconverges with Brinson CreekAnalytical data generated as part of Interim Remedial Action/Feasibility Study in December of1993 combined with data obtained during previous investigations conducted at Site 35identified the presence of petroleum contaminated soil in the vicinity of the former Fuel FarmASTs and to the north and northwest in a broad area extending from the former UST adjacentto Building G480 to the vicinity of monitoring well MW-25. In general, the analytical datasuggests that the majority of the contaminated soil is present within a narrow zone that beginsjust above the top of the shallow groundwater table.Three areas of soil contamination requiring remediation have been identified as depicted in theWork Plan. The first area, C, is located in the vicinity of the previously existing Fuel FarmsASTs. The two other areas are located north of the Fuel Farm. The larger of these two areas,A, is located along “F’ Street in the vicinity of monitoring well MW-11; the smaller area, B, isin the area of monitoring well MW-25. Approximately 3,600 cubic yards (4,900 tons) ofcontaminated soil is estimated to be present in these three areas.1.3 SCOPE OF WORKUpon completion of the Remedial Action Work Plan (RAWP), OHM will implement the planthrough performance of the following major tasks:l Mobilization and Site Preparation which will include construction andinstallation of an office facility and personnel and equipment decontamination facilities;utilities installation; access road construction and grading; establishment of erosioncontrol and installation of berms; installation of fencing; delineation of work zones; andclearing and grubbing.l Perform Site Survey to establish excavation limits.OHM Rojcct 16487SSHSP Hulth and Safety Plan July 1995Information herein is proprietary xnd aMidetttia1 md to be uSed 61 reltird lo others only with explicit writ+ permission of OHM Ran&&onServices Corp.l-2_-__-.