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1 <br /> Working To Restore Nature <br /> but were not present at or above method detection limits in January and April 1994 A summary <br /> of the groundwater analytical results are presented in Table 2 <br /> 1 Depth to water has ranged from 70 35 to 75 26 feet in well MW I and the facility well water <br /> level has been measured at 78 70 feet below grade A summary of the groundwater monitoring <br /> 1 data is presented in Table 3 <br /> 1 OBJECTIVES AND SCOPE OF WORK <br /> ' The objective of this investigation is to establish a site specific gradient direction and magnitude <br /> and to further define the impact to soil and groundwater from the contamination associated with <br /> the abandoned 3500 gallon underground storage tank located beneath the southeast corner of the <br /> ' maintenance/office building <br /> To achieve the above objectives the following scope of work is proposed <br /> 1 O Drill one boring to approximately 87 feet below grade approximately 20 feet west of the <br /> tank location (Figure 4) and complete it as a monitoring well to further assess the lateral <br /> extent of soil and groundwater contamination and to provide additional groundwater <br /> elevation data for gradient magnitude and direction calculations <br /> ' o Collect two soil samples for analysis from the boring with one sample collected from the <br /> soil/groundwater interface Analyze the collected samples for BTEX/TPHg <br /> ' o Monitor, survey, develop and sample the new well and purge and sample the existing <br /> well, collecting groundwater samples for BTEX and TPHg <br /> 1 o Survey, monitor and sample the facility well, tying the data into the survey data from the <br /> new well and the existing well to calculate gradient direction and magnitude <br /> 1 <br /> Methodology <br /> 1 RESNA proposes to drill one soil boring to be completed as a groundwater monitoring well <br /> The boring will be drilled by Spectrum Explorations, Inc , license no 51228, using a hollow <br /> 1 stem auger rig A field geologist will be present to log all drill cuttings and soil samples <br /> utilizing the Unified Soil Classification System Descriptions of soil types encountered, sample <br /> collection intervals and well construction details will be recorded on boring/well logs and <br /> ' included within the Summary Report <br /> M%150W\REP0RTSMP-0794 FNL 4 <br /> 1 <br />