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be determined at time of analysis with the value <br /> recorded as part of the analytical report. <br /> Note- <br /> Pursuant to paragraph 5 . 3 . 4 (E) (2 ) of the <br /> Department ' s March 1, 1988 Remedial Action Order <br /> (RAO) , characterization of the vadose zone is <br /> required. As part of this characterization, <br /> all soil samples collected in accordance <br /> with the modified workplan shall be classified <br /> using the Unified Soil Classification <br /> Scheme (USCS) . see page 26 of the RAO for <br /> additional characterization requirements . <br /> Fig 4-2 Add the following sample locations; <br /> S-23 & S-24 ; See comment below regarding Page 4-4 <br /> for description of locations. <br /> Page 4-4 Revise to include the following additional <br /> sample locations; <br /> Location S-23 ; On residential property between <br /> sample points S-21 and S-14 , <br /> approximately 5 feet south of the <br /> fence. <br /> Location S-24 In center of bottom of roadside <br /> ditch on west side of Dawes, <br /> located midpoint. between S-14 and <br /> S-15. <br /> Page 4-5 Second paragraph; <br /> —Revise to indicate additional sample locations and <br /> elevations specified in the above comment for Page <br /> 4-4 . <br /> Third paragraph; <br /> All soil samples collected from the perimeter of the <br /> south yard and scheduled for analysis (Table 4-1) shall <br /> include determination of total chromium, hexavalent <br /> chromium, arsenic, copper, and zinc concentrations. <br />