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AOC Work Plans <br /> reported by AGE to be within background levels. TPHg and SVOCs were not detected in any of <br /> the soil samples analyzed and the pH was within normal ranges(7.95). <br /> With the exception of dissolved chromium, detected below the PRG in bol h samples at a maximum <br /> concentration of 0.073 mg1L, all requested compounds were below laboral ory reporting limits for <br /> the groundwater samples. <br /> Data Gaps <br /> Additional sampling is necessary to confirm the horizontal extent of TPH d lead in excess of <br /> cleanup levels in the upper five feet of soils in the Former Steam Cleaning and Western Ditch <br /> Areas. Samples(shallow only)will also be analyzed to confirm that VOC , SVOCs, and phenols <br /> are not present in shallow soil as these compounds were not analyzed in al samples during <br /> previous sampling events. <br /> Field Investigation Approach <br /> Three test pits will be excavated within the SCAT area and three will bee cavated within the <br /> SCA2 North and the Western Drainage Ditch as detailed on Plates 4.4a an I 4.4b. A total of 12 soil <br /> samples(two samples in each of the six test pits)will be collected at depth 3 of 1.0 and 5.0 feet bgs. <br /> Soil samples will be collected by either driving sample tubes directly into a soil in the test pit or <br /> by driving the tube directly into the backhoe bucket. All samples will be a aalyzed for TPHd, <br /> TPHmo,and lead. In addition samples at one foot bgs will also be analyzed for VOCs, SVOCs, <br /> and phenols. <br /> Draft <br /> KB61125 workplan-ESC MACTEC Engineering and Consulting, Inc. 41 <br /> September 28,2005 <br />