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Ceobg"al reclueccs Inc Page 8 Soil and Groundwater Investigation Work Plan Cardoza(Main St) Project No 662 2 January 17,2003 To account for differences in contaminant distribution, an inner core and an outer ring may be used on several of the layers The mass of contaminant in each cylinder is determined by squaring the radius of the cylinder and multiplying by Pi (7r) to determine the area The area is then multiplied by the thickness of the layer to get the volume The volume is multiplied by the density of the soil (lbs/ft') then by 0 4536 to convert from pounds of soil to kilograms of soil The contaminant load is then multiplied to this number to give the mass of contaminant in milligrams The contaminant mass in milligrams is then converted to kilograms, which is ' the contaminant mass value you are after The groundwatei value is calculated much the same except that the groundwater ' contaminant load is multiplied by the volume of groundwater in the pore space of the soil The volume of groundwater is determined by multiplying the porosity of the soil tunes the volume of soil 6.0 AQUIFER PUMPING TESTS ' The aquifer pumping test plan will be submitted in an addendum pending completion of the above work Additional data on the subsurface lithology and contaminant distribution is needed before this work can begin 70 SCHEDULES & REPORTING Geological Technics Inc anticipates beginning fieldwork no later than 30 days after USTCFP approval and upon issuance of the drilling permit for the CPT boreholes The information gathered during this phase of work will be presented in a report, which will include a summary of the geology as well as the results of sample analyses Quarterly ' reports will be submitted for the ongoing groundwater investigation Based on this information, GTI will complete a fate & transport/risk evaluation report to detennine if the site represents a threat to human health or the environment Dr Ray Kablanow, a registered professional geologist, will supervise the project Copies of the reports will be forwarded to both the appropriate County and State regulatory agencies (SC PHS/EHD and CRWQCB)