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Neenah Paper,Inc. July 27, 2010 <br /> First-Half 2010 Groundwater-Monitoring Report Page I of 7 <br /> Introduction <br /> This report presents the results of first-half 2010 groundwater monitoring performed by <br /> Lawrence &Associates (L&A)between January 11 and April 8, 2010, at Neenah Paper FR <br /> LLC's (NP's) Ripon mill (Figure 1). <br /> The work described in this report fulfills the monitoring and reporting requirements set forth in <br /> Waste Discharge Requirements, Order 5-01-148, dated 14 June 2001, issued by the California <br /> Regional Water Quality Control Board, Central Valley Region (CVRWQCB) as well as the <br /> site's revised monitoring and reporting program(MRP) for Waste Discharge Requirements, <br /> Order 5-01-148, dated September 14, 2009. <br /> Figure 2 shows all monitoring well locations. <br /> Table 1 (following text)presents well descriptions including well names, casing diameter, <br /> reference point elevation, total depth, screened intervals, and aquifer unit (s). <br /> Compliance Record <br /> All monitoring, reporting, and effluent TDS levels were in compliance with WD Order 5-01- <br /> 148 (Attachment F). <br /> In July 2009, the NP mill closed and most of the paper-making machinery was removed. The <br /> effluent stream generated during paper production has ceased, although NP is still accepting, <br /> diluting, and disposing the brine stream from the adjacent Fort Chicago US Power Inc., <br /> cogeneration plant(Cogen). The Cogen produces approximately 300,000 gallons of <br /> regeneration brine per day with an average total dissolved solid(TDS) concentration of 1,000 <br /> mg/L. Cogen brine is discharged to NP's clarifier where it is mixed with lower TDS water from <br /> well PW-6 before being discharged, in sequence, into aeration stabilization basins ASB-1 and <br /> ASB-2, and then pumped to irrigation and percolation fields around the site for disposal. <br /> Groundwater chemistry under portions of the site does not meet water-quality protection <br /> standards (WQPS) established for this site, although remediation activities at the site are <br /> ongoing, and groundwater quality is continuing to improve. <br /> In correspondence dated August 12, 2006, the CVRWQCB adopted WQPS for the aquifers <br /> underlying the NP site. Table 2 presents WQPS for the site. <br /> 005194.04 Task 4 Lawrence&Associates <br /> W.•I CLIENTSToxRiver-Neenah I QuarterlyMonitoring1201011 st half 2010 report.doc <br />