SITE INFORMATION AND CORRESPONDENCE

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Ms. Anne Ogrey Holly Sugar-Tracy • - 3 - • 10 July 2008 quarterly report needs to include the requested table and a figure showing the location of any nearby wells (both on and off facility property) as well as the monitoring wells. The table needs to include distance from the Site, well owner, well location, year installed, total depth, depth of seal, screen interval, and well use. 9. The Report is dated 23 May 2008, but Regional Water Board staff did not receive the hard copy report until 20 June 2008. According to the 7 December 2007 Regional Water Board staff letter, the Report was due on 1 May 2008, but staff granted an extension until 23 May. Hard copies of the quarterly reports are due to Regional Water Board staff by the due date. By 1 August 2008, Spreckels needs to submit the second quarter 2008 report. In 2005, Regional Water Board staff originally requested Spreckels to conduct quarterly groundwater monitoring of Site wells and submit monitoring reports. Spreckels conducted three quarters of monitoring in July 2005, October 2005, and June 2006, but submitted only one monitoring report in November 2005, which summarized the first two monitoring events. In January 2007, Spreckels submitted a closure report with the results of the third monitoring event. In December 2007, Regional Water Board staff requested four consecutive quarters of groundwater monitoring. Since fourth quarter 2007, Spreckels has conducted two quarters of groundwater sampling and submitted two monitoring reports. Both monitoring reports request the Regional Water Board staff to consider the Site for closure, and both have failed to meet the requirements listed in the 7 December 2007 Regional Water Board staff letter. Spreckels needs to conduct quarterly monitoring and sampling and provide complete reports. Regional Water Board staff cannot consider the Site for closure until Spreckels shows the plume is defined, estimates when the Site groundwater and soil will reach WQOs, shows the groundwater wells have a declining trend, and confirms that no sensitive receptors are affected or threatened. If Spreckels continues to fail to provide the requested information, Regional Water Board staff will recommend to management that enforcement action be taken. In summary, by 1 August 2008, please submit the second quarter 2008 monitoring report summarizing the second quarter 2008 sampling event and including an evaluation of plume delineation, a table with the water supply well information, a figure showing all wells monitored and the locations of the nearby supply wells, and isoconcentration contour maps. In addition, by 11 August 2008, submit a work pian for lateral plume definition. The third quarter 2008 monitoring report is due 1 October 2008. If you have any questions, you may contact me by phone at (916) 464-4819 or by email at kshelton�waterboards.ca.gov. � KRISTIN SHELTON Water Resources Control Engineer Aboveground Tanks Cleanup Unit cc: Mr. Harlin Knoll, San Joaquin County Environmental Health Department, Stockton Mr. John Minney, Madera Ranchos