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i <br /> ' 23 December 2005 <br /> •, AGE-NC Project No 95-0103 <br /> ' Page 7 of 7 <br /> Additional analytical data from the site, Including a trend of the EAC and other <br /> ' bio-degradation parameters would better support the use of natural attenuation for the site <br /> 5.0. RECOMMENDATIONS <br /> ' Based the results of the past two quarterly monitoring events, on 10 August and 25 October, 2005, <br /> AGE recommends <br /> • Continued quarterly ground water monitoring at the site as required by California Code of <br /> Regulations and as approved by the EHD <br /> ' An active remediation system on the site may be beneficial to remove the higher dissolved <br /> concentrations,including the operation of the ground water extraction and treatment system <br /> with the installation of additional ground water recovery wells near wells VE-1, EW-3 and <br /> ' VE-6 However, the static water conditions required to stimulate and evaluate the natural <br /> attenuation activity on the site preclude ground water extraction <br /> I ' <br /> 6.0. ' LIMITATIONS <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 Evaluation of the hydrogeologic conditions <br /> at the site for the purpose of investigation have been made from review of reports prepared by <br /> previous consultants and AGE, and a limited number of available data points (e g , ground water <br /> ' samples from monitoring and recovery wells) Subsurface conditions may vary away from these data <br /> points No other warranty, expressed or implied, is made as to the professional Interpretations, <br /> opinions and recommendations contained in this report <br /> 1 <br /> 1 <br /> ' Advanced GeoEnvironmental,Inc <br /> 1 r <br />