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Geomatrix Consultants <br /> October 14,2003 <br /> t Page 5 <br /> is unknown. The three largest zones of buried metal are located near 270E/35N,380E/190N, and <br /> 100.E/180N(Plate 2). <br /> LIMITATIONS <br /> ' a In general,there are.limitations unique to each geophysical method employed for this investigation. <br /> For a xample,u tilities in ay b e b uried d eeper t ban t he d etection c apabilities o f t he g eophysical <br /> method. There may be a lack of contrast in physical properties between native soils and buried <br /> objects. Above or below ground cultural features, such as vehicles,fences, and debris,may cause <br /> interference that limits or masks the detection of a nearby utility. Since the accuracy of our findings <br /> is subject to these limitations,it should be noted that not all utilities and buried objects or features <br /> '. may have been detected or characterized by the geophysical techniques used for this investigation. <br /> Additional discussion of the limitations with regard to each of the geophysical methods employed <br /> ' for this investigation are included in Appendix A. <br /> i ' <br /> Other general limitations at the site include the extensive debris and brush cover within the proposed <br /> ' investigation area. There is a significant portion of the property that was not surveyed for buried <br /> s utilities due to limited access and instrument interference. Care should be exercised in excavating <br /> specific targets identified by thegeophysical investigation. <br /> 1 ` STANDARD CARE AND WARRANTY <br /> i.. <br /> The scope of NORCAUs services for this project consisted of using geophysical techniques to <br /> explore the subsurface. The accuracy of our findings is subject to specific site conditions and <br /> g limitations inherent to the techniques used. We performed our services in a nmanner consistent with <br /> the standard,ofeare ordinarily exercised by members of the profession currently employing similar <br /> techniques.No warranty,with respect to the performance of services or products delivered under this <br /> agreement,expressed or implied, is made by NORCAL. <br /> ' L We appreciate having the opportunity to provide you with our geophysical services. <br /> h <br /> 4 Respectfully, <br /> NORCAL Geophysical Consultants,Inc. <br /> Dan P.Jones <br /> Geophysicist,GP-1042 <br /> fi`. <br /> h.: <br /> 1 <br />