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Mr. Gregory Torlai, Jr. • -4 - ' 29 April 2009 <br /> H&H Marina <br /> surface through undocumented minor spills while being transferred from tanker <br /> trucks to the ALTs. We do not concur that the 1 ,2-DCA detection can be interpreted <br /> as conclusive evidence of a UST release. <br /> 4. The laboratory report for the spilt sampling confirmed that dissolved petroleum <br /> hydrocarbon results in MW-2 are significantly reduced compared to September <br /> 2007. TPHd and TPHg concentrations were ND and 19,000 pg/L, respectively. <br /> BTEX concentrations were 37 pg/L, 81 pg/L, 990 pg/L, and 5,900 pg/L, respectively. <br /> Based on verbal comments by AGE, the Central Valley Water Board staff's results <br /> are consistent with AGE's split sampling results and the decreasing concentration <br /> trends observed in this well. The concentration of total heterothropic plate counts of <br /> 76,000 colony forming units per milliliter establishes that there is a presence of <br /> degrader microbes in the September 2007 plume. <br /> 5. We concur with most of H & H's recommendations for modifying the MRP. The <br /> revisions are incorporated in the enclosed draft revised MRP. We did not include <br /> requirements for additional analysis for 1 ,2-DCA and EDB, but H & H may conduct <br /> these analyses and report the results to the Central Valley Water Board. <br /> 6. The Annual Report is addressed to Mr. Mark Clardy of the Central Valley Water <br /> Board staff. However, I have been the case worker for this Site for more than two <br /> years. In future, send all reports to my attention to ensure there is no delay in them <br /> reaching me. <br /> 7. The Annual Report states that it was prepared on behalf of Mr. Dave Smith. <br /> However, Mr. Smith sold the marina to the current owners two years ago. This <br /> needs to be corrected in future reports. <br /> By 29 May 2009, please provide comments on the draft revised MRP, and by <br /> 27 July 2009, submit a work plan for the proposed boring completions, well <br /> installations, and remediation system upgrades. <br /> If you have any questions regarding this letter, you may contact me at (916) 464-4811 <br /> or at betaylor@wate oards.ca.gov. <br /> BRIAN E. TAY OR, R.G. <br /> Engineering eologist <br /> Enclosure <br /> cc: Ms. Margaret Lagorio, San Joaquin Environmental Health Department, Stockton <br /> Mr. Chuck Spurlock, H & H Marina, Stockton <br /> Mr. Arthur Deicke, Advanced GeoEnvironmental, Inc., Stockton <br />