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Five-Year Water-Quality Report November l7,2008 <br /> Neenah Paper FR LLC Ripon Mill Page 19 of 19 <br /> period of record 1992 through 2002). That analysis showed 23% of the wells onsite with an <br /> increasing trend,43%with a decreasing trend, and 34%with no trend. <br /> Figure 13 shows a summary of the trend analyses by well,plotted on a site map. Upward trends are <br /> denoted by an upward pointing arrow and downward trends by a downward pointing arrow. The size <br /> of the arrows is proportional to the percentage of analytes that have downward or upwards trends in <br /> each well. <br /> The highest proportion of downward trends is in the southeastern part of the site and the highest <br /> proportion of upward trends is in the northeastern part of the site. As discussed above,the higher <br /> number of downward trends and better water quality in the southwest reflect the influence of the <br /> Stanislaus River and the application of SSJID irrigation water in the east percolation field. The <br /> higher number of upward trends and poorer water quality in the northeastern part of the site mainly <br /> reflect the concentration of parameters through evapotranspiration of the eucalyptus trees. <br /> Overall, the current trend analyses (2002—2007) suggest that improvements in groundwater quality <br /> have slowed over the last five years, compared to the previous 10 years. <br /> ORGANIC COMPOUNDS IN GROUNDWATER <br /> As discussed in the fourth-quarter 2007 monitoring report for the Mill, VOCs have been detected in <br /> groundwater in the upper and intermediate aquifer zones along the northern and western property <br /> boundaries. Purged water from these wells is disposed though Nestles groundwater-treatment <br /> system. VOCs detected in the past include trichloroethene(TCE), cis-1,2-dichloroethene,vinyl <br /> chloride, and chloroform. <br /> The distribution of VOCs appears coincident with the plumes delineated for the Nestles' site. A <br /> VOC plume in the uppermost aquifer is centered beneath the former Nestles site, directly north of the <br /> NP site. The plume is more widespread,but lower in concentration, in the intermediate aquifer, and <br /> VOCs are not present or below detection levels at most locations in the lowest aquifer zone. <br /> 003044.02 Lawrence&Associates <br /> W.-UientslFoxRiver-NeenahU year review reports Year Review 2008Weenah_5YearReview Aug2008.doc <br />