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Harding Lawson Assocfat" <br /> IV REMEDIAL ALTERNATIVES <br /> A. Screening Criteria for Remedial Alternatives <br /> ' Remedial alternatives were screened using the following <br /> criteria: <br /> • Risk to human health and the environment, <br /> ' • Acceptability to regulatory agencies, <br /> • Proven technologies that do not require extensive <br /> maintenance, <br /> • Length of time required to complete remediation, <br /> ' + Disruption to existing site operations, and <br /> • Relative cost, including capital, operating, and <br /> maintenance expense. <br /> B. General Soil Remediation Alternatives <br /> The following remedial alternatives were considered: <br /> + No action, <br /> • Excavation of soil for surface treatment and Class III <br /> disposal , <br /> • Excavation of soil for Class II and Class I disposal, <br /> • Vacuum extraction of soil vapors for surface treatment, <br /> and <br /> ' 0 In-situ bioremediation. <br /> ' 1. No Action <br /> Monitoring soil conditions to measure effects of <br /> natural remediation processes (bioremediation, oxidation, and <br /> volatilization) was not chosen because unaided natural processes <br /> ' are relatively slow; the current condition of soil at this site <br /> 9 <br />