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Human Health Risk Assessment <br /> Former Mobil Oil Bulk Plant 04-343 <br /> 500 East Grant Line Road <br /> Tracy, California <br /> SUMMARY OF POTENTIAL REMEDIATION TECHNOLOGIES <br /> Remedial Technology Limitations Economic Concerns Feasibility of Remedial <br /> Technology at this Site <br /> Pump-and-Treat High rate of activated carbon <br /> usage for recovered water in Not cost-effective for low level Requires long remediation times. <br /> contact with LPH. dissolved-phase contamination. Not capable of completely <br /> remediating ground water. <br /> In Situ Vapor Extraction Not cost effective for sites with <br /> Not an effective option for low limited extent of contamination. Not feasible for the type and extent <br /> volatility hydrocarbons (e.g., of contamination. <br /> diesel-range hydrocarbons). <br /> Excavation and Disposal Not feasible due to depth of <br /> Depth of contamination. Likely to be cost prohibitive. contamination and possible <br /> Excavation may extend offsite. presence of hydrocarbons beneath <br /> public right-of-way. <br /> Excavation and Treatment Not feasible due to depth of <br /> Depth of contamination. Likely to be cost prohibitive. contamination and possible <br /> Excavation may extend offsite. presence of hydrocarbons beneath <br /> public right-of-way. <br /> In Situ Bioremediation <br /> Not feasible in the presence of High capital, operating, and Uncertain effectiveness. <br /> LPH and fine-grained materials. maintenance costs. <br /> Risk Assessment/Passive Relatively inexpensive <br /> Remediation and May require long-term ground Effective tool to develop cleanup Feasible. Recommended <br /> Ground Water Monitoring water monitoring. criteria. remediation plan. <br /> ' 30-0136-11 <br />