Laserfiche WebLink
John Schroeter - 2 - • 30 January 2007 <br /> • The Workplan states groundwater samples will be analyzed for both total and dissolved <br /> constituent concentrations. As stated in Item 7.d of the 14 November 2006 Incomplete <br /> Report of Waste Discharge correspondence, "Please note that all groundwater samples j <br /> for metals analysis in this investigation should be filtered prior to digestion and analysis." <br /> You should consult the June 1989 Designated Level Methodology for Waste <br /> Classification and Cleanup Level Determination for further information on this topic. The <br /> document is available at: <br /> http://www.waterboards,ca.gov/centralvalley/available_documents/guidance/dIm.pdf <br /> • Please describe how the disposal of soil cuttings, well development water, and <br /> groundwater purging water will be performed in a way that prevents discharge to the <br /> Mokelumne River. Discharge of liquid wastes,to the standby storage pond may be an <br /> acceptable method. <br /> • The description of the wellhead does not describe placement of concrete pad at the <br /> surface. Please address this construction feature. The Well Installation section of the <br /> Workplan refers the reader to Attachment B to see a typical monitoring well construction <br /> diagram; the diagram was not included in the transmittal. Please provide the diagram. <br /> Please address the items listed above prior to implementing the Workplan. If you have any <br /> questions on this Conditional Approval, please contact me at (916) 464-4616. <br /> TIMOTHY . O'BRIEN <br /> Waste Discharge to Land Unit <br /> cc: Margaret Lagorio, San Joaquin County Environmental Health Department, Stockton <br /> Brandon Wilken, P.G., Cambria Environmental Technology, Emeryville <br /> W:AS%MObrienTSen lmquiMl ..he DnMd,a .,26 An 07.d. <br />