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Diamond Pet Food&Ripon Cogeneration January 31,2016 <br /> Attachment D Paze 2 oft <br /> For the large-sample approximation, I Zs1 is compared to a critical value, Z�,;t, where Z�,it <br /> is the value of the standard normal distribution for I Zs1 with a probability of exceedance <br /> a/2. If I Zsj >probability of Zcrit, a positive correlation(trend) is indicated. <br /> DISCUSSION <br /> Trend analysis was conducted for the data set from April 2009 to present. <br /> Trends by analytes in all wells show the following characteristics: <br /> o EC concentrations trends are increasing in wells OB-4 and OB-26; stable (no <br /> trend) in wells OB-19 and 013-28; and decreasing in wells 013-2, 013-7, 013-8, <br /> and OB-11. <br /> o TDS concentration trends are stable (no trend) in wells 0134, OB-19, and OB-26; <br /> and decreasing in wells 013-2, 013-7, 013-8, OB-11, and 013-28. <br /> o Chloride concentration trends are increasing in wells OB-4 and OB-26; stable (no <br /> trend) in wells OB-11 and 013-28; decreasing in wells 013-2, 013-7, 013-8, and <br /> OB-19. <br /> o Nitrate concentration trends are increasing in wells 0134, 013-7, 013-8, 013-19, <br /> and 013-26; and stable (no trend) in wells 013-2 and 013-28; decreasing in well <br /> OB-11. <br /> 010107.07 Task 4 Lawrence&Associates <br /> W.ICLIENTSIDiamond Pet FoodsW10107.01-Groundwater MonitoringlGroundwater Monitoring1201614QAnnual 201612016 Stats text.docx <br />