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Problem Assessment Wak Plan <br /> Csus_'Multi-Campus Regimal Center <br /> 7anuaty 23,2003 <br /> Page-9- <br /> It should be noted that the proposed target clean-up levels are based on minimizing the potential for,human <br /> .�health risks and may not satisfy the SJCEHD and CRWQCB for site closure. If the clean-up levels as <br /> described are attained, however, Condor anticipates that the source area reduction may be enough to`reduce <br /> groundwater contaminants to concentrations that additional monitoring of the site wells will indicate'as not <br /> detected or very low in concentration. If this occurs, the SJCEHD and the CRWQCB may consider,the site <br /> for closure (no further action) if an estimate of residual site soil and groundwater contamination are <br /> provided and the site considered very low risk to the beneficial uses of groundwater- <br /> ; <br /> 7.0 SUMMARY AND CONCLUSIONS <br /> The site contains significant subsurface contamination from hydrocarbon fuels that could create'health <br /> hazards from toxic vapors in nearby buildings and potential migration of contaminated'groundwater off the <br /> site. The most cost effective remediation strategy involves a combination of SVE and groundwater pump <br /> and treat. The remediation time to achieve the target clean-up levels and potentially allow consideration of <br /> site closure is estimated to be 18 months to two years. <br /> 8.0 REPORTING <br /> I' <br /> `{ Condor anticipates that enough data will be collected during the proposed additional groin dwater <br /> E investigation activities to have fully evaluated the lateral and vertical extent of site groundwater ; <br /> contamination. If so, a PAR will be prepared and submitted to CSUS. At a minimum the PAR will include: <br /> (1) a discussion of the site history, (2) a description of the fieldwork conducted'at the site, '(3) the <br /> laboratory results, (4) a scaled site plan and cross-section indicating the estimated lateral and vertical r <br /> e— distribution of groundwater contamination, (5) drilling logs, (6) conclusions, and(7)recommendations. <br /> { <br /> II <br /> d ' <br /> s - <br /> I} <br /> i <br /> b <br /> ti� t <br /> li } <br /> 1 <br /> R <br /> - Eft <br /> I - - <br /> CONDOR <br /> E 3 <br />