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DRAFT <br /> Two soil samples Source Area 2,and 2 soil samples outside of Source Areas 1 or 4 <br /> Parameter groups: DI WET,PNAs,TPH-gasoline,TPH-diesel,and BTEX <br /> Purpose: Selected samples from Source Area 2 and selected samples <br /> from outside Source Areas 1 or 4 will be analyzed using <br /> DI WET to evaluate leachability of COCs.Up to four samples will be <br /> analyzed. <br /> Area H-Investigate Source of TPH-Diesel Source Near MW-23R <br /> Four borings(three inside the substation and one outside the substation),approximately 7 soil samples per <br /> boring and two grab groundwater samples from Zone A using the Hydropunch' <br /> Parameter groups: VOCs(for solvents), TPH-diesel, TPH-gasoline,BTEX,and <br /> PNA analyses. <br /> Purpose: To determine if the operation of a former automotive <br /> maintenance facility in Area II is the source of TPH-diesel in <br /> groundwater and whether solvents are present. <br /> Establish Downgradient Extent of COCs in Zone B Groundwater <br /> Two HydropunchTm Samples:Zone A and Zone B <br /> Parameter groups: PNAs,TPH-diesel,TPH-gasoline,and BTEX. <br /> Purpose: To determine if the edge of the groundwater plume has been <br /> established,to provide one more Zone B downgradient <br /> monitoring well along the perimeter of the site, and compare <br /> Hydropunch results with installed monitoring wells. <br /> Initial samples from new monitoring well <br /> Parameter groups: PNAs,TPH-diesel,TPH-gasoline, and BTEX. <br /> Purpose: Characterize or confirm downgradient extent of COCs <br /> Subsequent quarterly samples from new monitoring well <br /> Parameter groups: PNAs,TPH-diesel,TPH-gasoline,and BTEX. <br /> Purpose: Monitor downgradient migration of CDCs <br /> The analytical methods to be used for Phase IV groundwater analyses are provided in Table 1,which also <br /> includes the required container types,preservation methods and holding times. <br /> SFOIG:W:\OI I.DOC 5 <br />