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California Regional Water Quality Control Board <br /> .c� <br /> Central Valley Region <br /> Katherine Hart, Chair <br /> Linda S.Adams 11020 Sun Center Drive#200,Rancho Cordova,California 95670-6114 �v Arnold <br /> Secretary for Phone(916)464-3291 •FAX(916)464-4645 Schwarzenegger <br /> Environmental httpl/www.waterboards-ca.gov/centralvalley Governor <br /> Protection <br /> 1 September 2010 <br /> Mr. John Trinkle <br /> 24551 Kasson Road <br /> Tracy, CA 95304-9518 <br /> MONITORING WELL DESTRUCTION WORK PLAN, TRINKLE AND BOYS FLYING <br /> SERVICE, 31244 SOUTH HIGHWAY 33, TRACY, SAN JOAQUIN COUNTY <br /> Trinkle and Boys Flying Service has concluded four consecutive quarters of groundwater <br /> monitoring as requested by the California Regional Water Quality Control Board, Central Valley <br /> Region (Central Valley Water Board) in its 16 December 2008 letter. The results are <br /> tabulated in the following documents prepared by your consultant, Advanced <br /> GeoEnvironmental, Inc. <br /> 28 September 2009 Quarterly Report— Second Quarter and Third Quarter 2009 <br /> • 28 January 2010 Quarterly Report—Fourth Quarter 2009 <br /> • 25 March 2010 Quarterly Report— First Quarter 2010 <br /> The results show that pollutants that were identified in grab groundwater samples obtained in <br /> y 2008 are not detected in the monitoring wells. Organophosphate pesticides, carbamates, urea <br /> compounds, and volatile organic compounds were not detected in any of the three monitoring <br /> wells in any of the four quarters. <br /> Additional monitoring is not required. When Trinkle and Boys provides documentation that the <br /> monitoring wells have been property destroyed under San Joaquin County Environmental <br /> Health Department oversight, Central Valley Water Board staff will provide Trinkle and Boys <br /> with a letter stating that the assessment is complete and that no additional action is required. <br /> Please provide a well destruction work plan by 30 September 2010. The work plan may be <br /> provided by email. Thank you for working with the Central Valley Water Board to conduct the <br /> monitoring. We look forward to removing environmental restrictions from the property. If you <br /> have any questions, you may contact me by telephone at (916)464-4680 or by email at <br /> aterrell@waterboards.ca.gov. <br /> Original signed by <br /> AMY TERRELL <br /> Private Sites Cleanup Unit <br /> cc: Mr. Harlin Knoll, San Joaquin County Environmental Health Department, Stockton <br /> Ms. Ally Colavita, Advanced GeoEnvironmental Inc., Stockton <br /> California Environmental Protection Agency <br /> ZaRecycled Paper <br />