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• <br /> Item Evacuation Criteria Commdhts/Discusslon <br /> 2 10 Preferential Pathways Analysis According to Delta Environmental Consultants, Inc <br /> (Final Remediation Plan, January 29, 1991), City <br /> sewer and water lines are located on the north side of <br /> Charter Way and an additional water line is located <br /> along the center line of Charter Way Electrical and <br /> natural gas line are located along the northern edges <br /> of the property, south of the sidewalk Depths are <br /> unknown, however, it is highly likely that these <br /> utilities are shallower than groundwater beneath the <br /> site <br /> 2 11 Other Pertinent Issues NIA <br /> 3 Remediation Status <br /> 3 1 Remedial Actions Taken Approximately 1,100 cubic yards of impacted soil <br /> were removed from the site during tank replacement <br /> A skimmer installed in well MW-2 and MW-7 <br /> removed approximately 180 gallons of SPH in 1990 <br /> A soil vapor extraction (SVE) system was operated at <br /> this site from September 1992 to November 1996 <br /> During this time, the SVE system removed <br /> approximately 17,628 pounds of vapor phase <br /> hydrocarbons (about 2,871 gallons) from the <br /> subsurface The hydrocarbon extraction rate was <br /> about 400 lbs/day to September 1992 upon system <br /> startup This removal rate had decreased to 18 <br /> lbs/day by July 1993 The system was operated until <br /> November 1996, at which time it was removing about <br /> 1 4 lbs/day Remediation system operational data is <br /> included 2n Attachment 7 <br /> 3 2 Area Remediated The SVE system was hooked u to all onsite wells <br /> except clean wells MW-1.,,and-MW-6, remediating <br /> areas around the former and current USTs <br /> 3 3 Remediation Effectiveness Based on groundwater monitoring data, the <br /> remediation was very successful in removing <br /> petroleum hydrocarbons from the shallow soil and <br /> groundwater This is evident on the hydrocarbon <br /> concentrations graphs in Attachment 4 <br /> 4 Well and Sensitive Receptor <br /> Survey <br /> 41 Designated Beneficial Water Use Existing and potential beneficial uses include <br /> municipal and domestic water supply, agricultural <br /> supply, industrial service supply, and industrial <br /> process supply (CVRWQCB Basin Plan) <br /> 0778 4 <br />