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DEC 24 1992 <br /> EIV R iv, t ,; <br /> TABLE 1 <br /> EVALUATION OF ALTERNATIVES <br /> DDRW--TRACY OPERABLE UNIT NO. 1 <br /> Criteria Alternative 1 Alternative 2 Alternative 3 Alternative 4 <br /> Overall Protection of Does not protect human health or Prevents future exposure through Protects human health and Protects human health and <br /> Human Health and the the environment Interagency Management environment by remediating environment by remediating <br /> Environment - Agreement and deed restrictions plume to health-based cleanup plume to health-based cleanup • <br /> levels levels <br /> Compliance with Does not comply with ARARs Does not comply with ARARs Designed to meet ARARs for Designed to meet ARARs for <br /> ARARs for groundwater plume for groundwater plume remediation of all three aquifer remediation of all flute aquifer <br /> horizons and for achieving horizons and for achieving <br /> effluent standards effluent standards <br /> Long-Term No action taken to clean up No action taken to clean up Reduces TCE/PCE and other Reduces TCE/PCE and other <br /> Effeciivcness and plume plume volatile organic concentrations, volatile organic concentrations, <br /> Permanence uses accepted and reliable uses accepted and reliable <br /> technologies,but concern about primary technologies,added <br /> effectiveness of pump and treat biotreatment may enhance <br /> method cleanup compared to pump and <br /> treat alone <br /> Short-Temp No new construction No new construction Construction work will pose little Construction work will pose <br /> Effectiveness exposure threat to workers or the tittle exposure threat to workers <br /> public despite significant off-site or the public despite significant <br /> eonstructon off-site construction <br /> Reduclion in Toxicity, No reduction in TMV No reduction in TMV Peromanenl and significant Permanent and significant • <br /> Mobility,or Volume reductions in TMV reductions in TMV <br /> (1-MV) <br /> Implementability No limitations No limitations No limitations,except for No limitations for primary <br /> uncertain duration of cleanup technologies; in situ biological <br /> treatment needs pilot testing and <br /> is unproven at full scale <br /> Cost $1,734,000 51,748,000 $9,513,00 '$11,313,000 <br /> Q:w 089.h(9arraC)\I MIY119re91r <br />