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Mr. Gregory Torlai, Jr - 5 - • 11 January 2008 <br /> H & H Marina <br /> extraction wells will not be installed, it will need to provide an alternate plan to remediate <br /> the pollution in MW-4. <br /> 6. The Regional Water Board staff are not authorized to revise General NPDES Permit No. <br /> CAG915001 to grant H & H's request for a site-specific waiver of the 7.0 mg/L DO and <br /> 1,000 mg/L TDS receiving water requirements. However, we concur that the data show that <br /> the treatment system effluent is not causing the receiving water DO concentrations to be <br /> decreased below 7.0 mg/L or TDS concentrations to be increased above 1,000 mg/L. The <br /> ambient DO levels in the receiving water are naturally below 7.0 mg/L. Therefore, it will not <br /> be necessary to modify the receiving water requirements. <br /> 7. The Optimization Report recommends the following changes to the MRP: <br /> • removing TPHd from the analytical program, <br /> • removing TPHg analyses from most site wells and surface water samples, <br /> • limiting analysis of BTEX and oxygenate compounds to select samples, and <br /> • reducing the sampling frequency of select groundwater and surface water <br /> locations to semi-annual and/or annual frequencies. <br /> Due to the history of NDs for a number of compounds, revision of the monitoring program <br /> appears warranted, and Regional Water Board staff are prepared to contemplate revising <br /> MRP No. R5-2004-0828. However, revision of the MRP at this time is premature since the <br /> effects of September 2007 spill are not yet understood, and additional well installations <br /> may be necessary to delineate and remediate the commingled plume. H & H is not <br /> authorized to implement any of the requested changes until a revised MRP is issued by the <br /> Executive Officer of the Regional Water Board. <br /> In summary, by 29 February 2008, please submit a response to the comments in this letter <br /> and a work plan to further investigate and clean up the September 2007 gasoline release. If <br /> you have any questions regarding this letter, you may contact me at (916) 464-4811 or at <br /> betaylor@waterboards.ca.gov. <br /> BRIAN E. TAYLOR, R.G. <br /> Engineering Geologist <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 />