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Occidental Chemical Corp )tion <br /> Summary 2006 Annual Review Meeting Minutes <br /> and Semi-Annual Report <br /> Lathrop, CA - 6 - 23 October 2006 <br /> flow-through cell module. Since the MRP requires that the volume of purge water be <br /> included as part of the data collection per well, please ensure that accurate <br /> measurements of well purge volumes are included in all future Semi-Annual Reports. <br /> 8. In addition to comment No. 4 above, the Regional Water Board staff noticed that the <br /> units on the field parameter table in Appendix C are missing. Please ensure that either <br /> this information is added to future tables or that a cover page that describes all of the <br /> units is attached in future reports. <br /> 9. Figures 3.1 and 3.2 are missing the mass scale on the graphs. Please ensure that <br /> these are included on future graphs. <br /> 10.Figures 4.4 and 4.5 are missing what is presumed to be the unit of "feet" for the <br /> elevation scale. Please correct this for future reports. <br /> 11.Attachment 1 (table) presented in Appendix D presents sample pump and well <br /> information. Most of the headers in the data columns of this table lack the appropriate <br /> unit descriptions. One assumes that the units are "feet" or "feet below top of well <br /> casing". To avoid confusion, in future reports please provide a cover page to these <br /> tables with unit information or place the units in the appropriate column headers. <br /> In summary, the Regional Water Board staff requires.- <br /> 1. <br /> equires:1. The preparation of a workplan to assess the potential fumigant and sulfolane source <br /> area around PW18. This workplan is due to the Regional Water Board staff by <br /> 15 December 2006. <br /> 2. The preparation of a STWP that proposes the use of a supplemental treatment <br /> technology (i.e. additional GAC vessels) for the existing groundwater treatment system. <br /> This workplan is due to the Regional Water Board staff by 15 December 2006. This <br /> workplan can be combined with the assessment workplan as mentioned in item No. 1 <br /> above. <br /> 3. Unless otherwise stated, please address the remainder of the above comments in the <br /> Groundwater Remedial Program 2006 Annual Report, which is due to this office by <br /> 1 February 2006. <br /> If you have any questions or concerns regarding this correspondence please feel free to <br /> contact Steven Meeks by telephone at (916) 464-4678 or by email at <br /> smeeks waterboards.ca.gov. <br /> even W. Meek , P. <br /> Water Resource Control Engineer <br /> CC: (Next Page) <br />