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Port of Stockton UST#3 page 2 <br /> Port Rd 13 at G Street, Stockton <br /> ' f <br /> Before the EHD can concur with a request for no further action, ground water <br /> petroleum concentrations must be lowered. Please evaluate at least two <br /> remedial alternatives that can reduce these concentrations to acceptable levels <br /> and submit a technical justification for your cost-effective alternative to the EHD <br /> in the format of a Feasibility Study. The study should be submitted as soon as <br /> the plume delineation investigation,is complete and accepted by the EHD. <br /> The latest quarterly ground water.report submitted to Geotracker was for the <br /> second quarter 2006, which included groundwater data collected on May 25, !, <br /> 2006. This report did not include all petroleum constituents that are required. <br /> Ground water samples are to be collected from all of the monitoring wells at the <br /> site and analyzed for LUFT fuel oxygenates.by EPA Method 82608, 1,2-DCA <br /> and EDB by EPA Method 8260B, and lead by EPA Method 7421 in addition to <br /> the current analytical regimen. Please continue to sample the monitoring wells at <br /> this site and to upload all the data and quarterly report to Geotracker. <br /> Geotracker submittals must be up to date before a request for closure can be r <br /> evaluated by the EHD. <br /> i� <br /> In order to complete a future evaluation for no further action, the closure report is. <br /> to contain all items listed in Tri-Regional Guidelines -Appendix B check list as <br /> well as conform to the report format listed in section 6.6 (NFAR Documentation) <br /> of Tri-Regional Guidelines, 16 April 2004 document. Additionally, contamination <br /> left in place must be evaluated for the potential health hazards of direct <br /> exposure, vapor emissions to indoor air, and gross contamination (odor, <br /> nuisance, gross pollution) from the contaminated soil and ground water. <br /> Currently the EHD and the CVRWQCB use the San Francisco Bay Regional <br /> Water Quality Control Board (SFBRWQCB) Environmental Screening Levels <br /> electronic version lookup tables (ESL Surfer-October 2005) to evaluate if the <br /> contamination can remain in place. <br /> Thank you for your cooperation in this investigation. You may contact Michael <br /> Infuma, Senior REHS at (209) 468-3454,if you have .any questions. <br /> Donna Heran, REHS, Director <br /> Environ ental Health 12epartm t <br /> e�LeecJ� <br /> Michael J. Infurna Jr., enior REHS Nuel C. Henderson Jr., PG <br /> LOP / Site Mitigation Unit IV Engineering Geologist <br /> LOP 1 Site Mitigation Unit IV <br /> cc: . CVRWQCB -.James L.L. Barton, PG. Sacramento. <br /> SWRCB-CUF — Mark Owens, Sacramento. <br /> Geomatrix Consulting — Bradley A. Loewen, 2444 Main St. Fresno 93721 <br />