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• Upgradient wells:MW-DIS-4,-5,-6,-7S,-713,-8S,and-81). <br /> • Downgradient wells: Currently,no downgradient wells exist. <br /> • Crossgradient: MW-DIS-3,-9,and-10 <br /> 0 Within Plume: MW-DIS-1,-2,NP-1=70',-80',-90',SVE-South,and SVE-North. <br /> jTable 7 presents the recommended sampling frequency for all wells at the Disco site. Due to <br /> the recently discovered presence of 1,2-DCA, EDB,and TBA,we recommend that all-wells <br /> be sampled for these compounds on a quarterly basis to assess the extent of these <br /> compounds at the site. Modifications to the sampling plan will be made after four rounds of <br /> sampling for these compounds. This event was the second sampling event for these <br /> compounds. Monitoring wells MW-DIS-1,MW-DIS-2,NP-1-70,-80,-90,SVE-South, and <br /> SVE-North will continue to be sampled semi-annually for TPH-gas and BTEX compounds. <br /> Note:In order to continue the accurate assessment of the groundwater flow direction, <br /> water level measurements in all wells and evaluation of the groundwater gradient will <br /> continue to be performed on a quarterly basis. <br /> 7 <br />