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Mr. Todd Del Frate • <br /> CVRWQCB July 15,2009 <br /> Page 2 ­r') <br /> Protection Standard (WQPS) of 713 mg/L TDS established by the CVRWQCB for the <br /> semiperched aquifer in correspondence to Fox River Paper Company dated 21 August <br /> 2006. <br /> Corrective Action Implementation Schedule <br /> It is NP's desire to continue with an active program of reducing groundwater TDS levels <br /> under its Ripon mill by irrigating its east percolation field with water containing TDS <br /> levels below the 714 mg/L WQPS established for TDS concentration in the semiperched <br /> aquifer. In lieu of applying South San Joaquin Irrigation District (SSJID) water during <br /> the 2009 irrigation season, this task will be accomplished by applying groundwater from <br /> NP's production well PW-6 to the east percolation field. If groundwater from PW-6 is <br /> applied at a rate of 250 gallons per minute, it would take approximately 127 days to apply <br /> i40 acre-feet of low TDS (224 mg/L' groundwater on the field. i40 acre-feet of water is <br /> approximately the amount obtained from SSJID during each of the previous two years. <br /> As with the SSJID water, the application of groundwater from PW-6 will create a <br /> hydrologic barrier between ASB-2 and the production wells and lower TDS levels in the <br /> underlying aquifers. <br /> Reduced Monitoring Schedule Request <br /> It is requested that the CVRWQCB reduce the monitoring frequency at this site from <br /> quarterly to semiannual (once during the wet season [I"quarter] and once during the dry <br /> season [3rd quarter]). This recommendation is based on previous analyses which indicate <br /> that groundwater quality beneath the site is relatively stable or only changing slowly <br /> through time as documented by seventeen years of quarterly groundwater-monitoring <br /> data. Additionally, seasonal variations in groundwater quality have been well <br /> documented, rendering quarterly monitoring less useful. <br /> Change In Ownership Notification <br /> NP will notify the CVRWQCB in the event of a change in ownership of the mill property. <br /> Please call me at (530) 275-4800 if you have any questions regarding this work plan. <br /> Sinc�erely, AL <br /> David <br /> GFO` <br /> David L. Kirk DAVID L. <br /> Senior Geologist P.G 6673KIRK � <br /> 1° 9/3009 <br /> No. 6673 <br /> Attached: CVRWQCB letter dated 8 June 2009 <br /> CC: Rod oF Ca�`�0�+ey <br /> Rodger Ferguson,Neenah Paper,Alpharetta,GA <br /> Mike Owens,Neenah Paper,Inc.,Ripon,CA <br /> Margaret Lagorio, San Joaquin County Environmental Health,Stockton,CA <br /> 003044.03 <br /> 03 <br /> Lawrence&Associates <br /> W.•I Clienlients)FoxRiver-Neenah I Fina!July 10 2009 work plan.doc <br />