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C <br /> 12 June 1996 <br /> AGE-NC Project No. 95-0130 <br /> � 1 Page 5 of 5 <br /> and decreased.in wells MW-1, MW-3, and MW-5. <br />!. It should be noted that since ground water was between 5 to 10 feet above the tops of the screen <br /> intervals in.monitoring wells MW-1 through MW-4 during the April 1996 monitoring,the analytical <br /> �. results may not be representative of actual dissolved petroleum hydrocarbon concentrations in the <br /> native ground water. <br /> Preliminary historical research of the former Wells Fargo Bank property, located north of the site, <br /> has indicated that USTs may have been located on the property (see Appendix C -Sanborn Fire <br /> Insurance Maps). Furthermore, the PHS-EHD does not have any information on record indicating <br /> that USTs were removed from the Wells Fargo Bank property. <br /> Further assessment is required north and northeast of MW-5, on the former Wells Fargo Bank- <br /> property <br /> ankproperty to determine the extent of dissolved hydrocarbons in ground water. We recommend the <br /> r installation of two additional monitoring.wells on the former Wells Fargo Bank property. During <br />' L completion, we recommend the use of a minimum of 30 feet of screen to ensure that the ground <br /> water does not rise above the top of the screen intervals. <br /> A Corrective Action Plan (CAP) was submitted to the PHS-EHD in March 1996. Upon regulatory <br /> approval of the CAP, installation.of a remediation system should commence. <br /> 6.0. LIMITATIONS <br /> L <br /> Our professional services were performed using that degree of care and skill ordinarily exercised by <br /> environmental consultants practicing in this or similar localities. The findings were based upon <br /> analytical results provided by an independent laboratory. Evaluations of the geologic/hydrogeolog ic <br /> conditions at the site for the purpose of this investigation were made from a limited number of <br /> available data points(i.e. borings, monitoring wells), and subsurface conditions may vary away from <br />. these data points. No other warranty, expressed or implied, is made as to the professional <br /> recommendations contained in this report. <br />