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Five-Year Water-Quality Report November 17,2008 <br /> Neenah Paper FR LLC Ripon Mill Page 4 of 19 <br /> 6. Average weekly TDS concentration of groundwater extracted from the NP's wells was 508 <br /> mg/L during the period 2002 through 2007; TDS concentration ranged from 310 to 890 mg/L. <br /> Water received at the cogen from the City of Ripon from 2002 through 2007 had an average <br /> TDS concentration of 469 mg/L. Text Figure 6 shows an eight-week running average of <br /> weekly TDS concentration in the site production wells (PW-6, -7, and-8) and for water <br /> received from the City of Ripon: <br /> Text Figure 6 <br /> Process Water TDS Concentration - 8-Week Running Average <br /> 700 <br /> 600 - —— <br /> 500 3 , Ik A <br /> _j <br /> � � � <br /> 400 - ` ! j, <br /> fa <br /> E 1 \Ij <br /> vt 300 -- <br /> o City of Ripon <br /> 200 <br /> Site Wells(6,7,&8) <br /> 100 — <br /> 0 ---� <br /> Jan-02 Jan-03 Jan-04 Jan-05 Jan-06 Jan-07 Jan-08 Jan-09 <br /> Date <br /> 7. Text Figure 7 shows NP process-water quality improved over the past five years as determined <br /> by a TDS trend analysis by the Mann-Kendall method for trend analysis: <br /> Text Figure 7 <br /> Trend Analysis -TDS Mass in Production Wells <br /> 25,000 <br /> 20,000 — <br /> n=244 <br /> r <br /> Slope=-616.85 <br /> units per year. <br /> Y 15,000 -- Mann Kendall <br /> 4 normal approx._ <br /> N d� -7.387 <br /> a <br /> . <br /> cal <br /> Alpha Crit <br /> 0 10,006 0.01 -2.575 Down <br /> F— 0-05 -1.96 Down <br /> 0.1 -1.645 Down <br /> 0.2 -1.282 Down <br /> 5,000 <br /> i <br /> 0 <br /> Sep 2003 Jan 2006 May 2008 <br /> DATE <br /> 003044.02 Lawrence&Associates <br /> W.IClientsWoxRiver-Neenah l5 year review reportsl5 Year Review 2008Weenah_5YearReview Aug2008.doc <br />