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Mr. Tom Guido - 2 - 6 September 2001 <br /> 3. The Response states, "The background limitations listed in Table 4 are not appropriate for <br /> comparison to wells other than MW-4A,""standard minerals were originally included in <br /> the MRP to monitor groundwater changes that could be attributed to infiltration of treated <br /> groundwater at the aeration pond," and"the area is highly irrigated and undergoing other <br /> hydrolgeologic stresses that could affect the result of standard minerals analyses" and <br /> requests that standard minerals be dropped from the analyte suite. Based on these <br /> comments, Board staff recommends Triple E establish background concentrations that are <br /> appropriate for comparison to more than just one site well. Triple E must continue <br /> annual standard mineral analyses to determine if groundwater changes can be attributed to <br /> the infiltration of groundwater at the infiltration pond since all results prior to the second <br /> quarter 2001 monitoring event occurred when treated groundwater was being discharged <br /> and to further evaluate the effects of the hydrogeologic stresses in the area on the <br /> groundwater quality. <br /> The third quarter groundwater monitoring report is due by 30 October 2001. If you have any <br /> questions, you may contact me at (916) 255-3119 or lewisd rb5s.swrcb.ca.Rov. <br /> DEVRA LEWIS <br /> Environmental Specialist H <br /> cc: Mr. Mike Infurna, San Joaquin County Health Department, Stockton <br /> Mr. Michael Campos, Washburn, Briscoe &McCarthy, Sacramento <br /> Mr. John Kramer, Condor Earth Technologies, Sonora <br />