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i Messrs Trommer and Lin y 16 June 2008 <br /> Preliminary Five-Year Review Letters Page 6 of 7 <br /> Various Sites <br /> 2315 California Street, N. <br /> • The CUF recommends site closure consideration; the EHD will discuss the <br /> potential for closure with the Central Valley Regional Water Quality Control Board <br /> (CVRWQCB). The main problem with this site is the incomplete delineation of <br /> 1,2-DCA-impacted groundwater. The RP's consultant has indicated that he will <br /> recommend possible groundwater extraction from monitoring well MW-3-Shallow <br /> to further reduce TPHg and BTEX compounds concentrations. <br /> 2360 East Road <br /> • The CUF recommended site closure consideration. The EHD agrees with this <br /> recommendation and will direct submission of a site closure summary report that <br /> addresses the vertical extent of impacted groundwater, contaminant mass, mass <br /> reduction rate, etc. <br /> 2662 Wilson Way, N. <br /> • The CUF recommended assessment and implementation of groundwater <br /> remediation in a timely manner; the EHD agrees with the recommendation. An <br /> SCM has recently been submitted to the EHD; upon review of the SCM the EHD <br /> will direct groundwater remediation as appropriate. <br /> 3535 Cherokee Road <br /> • The CUF recommended assessment of remedial technologies; the EHD agrees <br /> with this recommendation. A remedial feasibility study is underway. <br /> 4405 Pacific Avenue <br /> • The CUF recommended direction of active remediation; the EHD agrees with the <br /> intent of the recommendation; the EHD recently approved a remedial action plan <br /> (RAP), the related trenches and wells have been installed and the system has <br /> been tested. Active remediation will be implemented after the San Joaquin Valley <br /> Unified Air Pollution Control District (SJVUAPCD) issues a permit to operate. <br /> 7647 Pacific Avenue <br /> • The CUF recommended continued DPE operation, to which the EHD agrees. <br /> The water discharge permit has recently been increased to 10 gallons per minute <br /> (GPM) from 5 gpm so the groundwater extraction rate will be increased. An <br /> SVE/IAS system is also in operation on the site. <br /> 11396 Highway 99 <br /> • The CUF recommends that the EHD direct active remediation. The EHD has <br /> recently approved a remedial action plan (RAP) for the site; the necessary wells <br /> and trenches have been installed and the system tested. Operation will be <br /> implemented when the permit to operate has been issued by the SJVUAPCD. <br /> There is a water supply well on site. <br /> 5-Year Review Comment Letter 061608.doc <br />