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PLJBLIC !iEALTH SERN CE <br /> SAN JOAQUIN COUNTY a"q <br /> ENVIRONMENTAL HEALTH DIVISION <br /> Ernest M. Fujimoto, M. D., M.P.H., Acting Health Officer <br /> 304 East Weber Avenue, Third Floor • Stockton, CA 95202 — .. . .,.. ;P <br /> 209/468-3420 �� <br /> c,ED KOBERSTEIN <br /> MONTGOMERY WARD & COMPANY INC MAY ® 5 W7 <br /> 1331 SO HARBOR BLVD <br /> FULLERTON CA 92632 <br /> RE: Montgomery Wards Auto Center SITE CODE: 163 <br /> 5400 Pacific Ave. <br /> Stockton, CA., 95207 <br /> San Joaquin County Public Health Services, Environmental Health Division (PHS-EHD) <br /> has recently received and reviewed the "Soil Vapor Extraction Pilot Study Report" <br /> submitted by your consultant, Environmental Audit Inc., and has the following <br /> comments. <br /> Conclusions reached in this report/feasibility study indicate that soil vapor extraction <br /> (SVE) would be the most cost-effective method to remove contaminants in the soil that <br /> may be contributing to the petroleum impact in the groundwater. PHS-EHD agrees with <br /> your conclusions and approves of SVE as a corrective action for this site. <br /> Please submit a Corrective Action Plan (CAP) that recommends target cleanup levels <br /> for long-term corrective actions to PHS-EHD for concurrence. Target cleanup level <br /> shall be based on the impact assessment, prepared in accordance with California Code <br /> of Regulations, Title 23, Division 3, Chapter 16, Article 11, Section 2725, subsection <br /> (e). <br /> Once the Corrective Action Plan has been approved by PHS-EHD, you should forwe rd <br /> a copy of the CAP to the State Water Resources Control Board (SWRCB) Cleanup <br /> Fund for cost pre-approval. After the fund has approved your costs for the CAP, yo <br /> may enact the remedial plan. <br /> During the time it takes to formulate and approve the CAP, PHS-EHD recommends at <br /> a test program be initiated for enhancing in-situ bio-remediation by increasing dissolved <br /> oxygen in the groundwater. Oxygen releasing compound bags (ORC) could be <br /> inserted into the monitoring wells that currently have water above the screened interval <br /> and the wells could then be monitored for an increase in the level of dissolved oxyge . <br /> In conversations with the SWRCB Cleanup Fund staff, this relatively low cost metho <br /> has been approved for sites not ready to perform active groundwater r'6mediation. <br /> A Division of San Joaquin County Health Care Services <br />