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2 2 2 Well Development and Elevation Surve <br /> After the monitoring wells are completed and the grout has had sufficient time to set (at least 72 <br /> hours), the wells will be fully developed and sampled Prior to developing a well, the well volume <br /> will be calculated and documented To complete the well development, the well will be pumped <br /> with a downhole electric pump until at least five (5) well volumes have been removed and <br /> groundwater temperature, pH, electrical conductivity and turbidity have stabilized <br /> A licensed surveyor will survey each of the newly installed wellheads and the two deep vapor <br /> ' extraction wells (VW-1 and VW-2) The surveyor will measure the elevation of the top of the well <br /> casing to the nearest 0 01 foot, referenced to an established benchmark <br /> 2 2 3 Waste Disposal <br /> Waste soil from the drilling operations will be stockpiled at the site on plastic sheeting Once <br /> drilling is complete, the sod stockpile will be sampled to profile it for appropriate disposition <br /> Since the soil borings are located outside of the defined plume of impacted soil, significant <br /> detectable concentrations of gasoline hydrocarbons in the waste soil are not anticipated <br /> All waste groundwater and equipment ansate wastewater will be contained in separate 55-gallon <br /> drums for appropriate storage, transport and disposal <br /> 2 3 Quarterly Groundwater Monitoring, Sampling and Analysis <br /> Following development of the newly-installed wells, the newly-installed wells and the deep vapor <br /> extraction wells (VW-1 and VW-2) will be monitored and sampled To monitor groundwater <br /> contaminant plume concentration and stability and natural biodegradation rates, groundwater will <br /> be monitored and sampled from these four wells on a quarterly basis for at least one year <br /> During each of the quarterly monitoring and sampling events, depth-to-groundwater and free <br /> product thickness (if necessary) will be monitored to each well using a water level indicator <br /> capable of measurements to within 0 01 foot <br /> Following liquid level measurement, each of the wells will be purged and sampled The wells will <br /> be purged with decontaminated PVC bailers or downhole pumps until at least three (3) well <br /> casing volumes have been extracted and/or after groundwater temperature, pH and electrical <br /> conductivity values have stabilized Groundwater will be sampled from the wells using <br /> 6 <br />