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IRM Prove-Out Reports -6- 29 August 1991 <br /> DDRW, Tracy <br /> g. The scales presented on the cross-sections are unconventional and are often <br /> confusing. For example, A-A' depicts the distance between IW-3 and MW-8 as <br /> 100 feet and the distance between IW-3 and MW-7 as about 20 feet. However, <br /> IW-3 and MW-7 are not necessarily 20 feet apart and IW-3 is a projection onto <br /> A-A' . The cross-sections need to be revised to clarify the horizontal and <br /> vertical scale. <br /> It should be noted that I tried to compare the cross-sections B-B' and D-D' which trend <br /> along the northern boundary of the site with the cross-section D-D' (Figure 3.4-5) from <br /> the RI/FS Report, which also trends along the northern boundary of the site. However, <br /> because there is no reference on the cross-sections to the wells installed by the <br /> different contractor, I could not make the comparison. Tracy needs to provide a better <br /> system for the exchange of information between the different contractors for the IRM <br /> and the RI/FS so that all available information can be used in the design of the final <br /> ground water remedial action. <br /> CKW:cw <br />