2821 RUCKER AVE 2018-01-02 MF Import

3)Reservoir leakage not collected by the underclrain system flows at 63 gpm,lhe long- term average flow through the Icakage meter. 4) All rainfall infiltrates the soil and emerges as springs on the slope on or above Mr. Bargreen's property. 5) Homes on septic tanks contribute 900 cubir feet per month of watcr to the slopes on or above Mr. Bazgreen's properly. The attached table summarizes the rcsults of this water budget analysis. For both drainage � channels,the hypothetical rcservoir leakage not collected by the drainage system,accounts for a small percentage of seepage or flow across Mr. Bazgrcen's property. The vast majority of groundwater or surface water Flow is attributable to precipitation that occurs uphill of Mr. Bazgreen's property. One method to reduce reservoir#4 leakage, which was suggested by Mr. Bargreen was installation of a hypalon liner. A hypalon liner would dramatically reduce, but not eliminate reservoir leakage. The cost of the liner would likely be at least $500,000. Conclusions: 1)The underdrain system appears to be functioning properly. 2) Even if the underdrain system is not collecting all rescrvoir leakage, it is unlikely that any of the leaked water is adversely impactinF Mr. Bazgreen's property. 3) Mr. Bargreen's property is located on slopes that can be naturnlly unstable. Water certainly can sontribute to the instability of these slopes,but reservoir leakage, if any, would be a minor contributor to a water-induced slope stability pmblem on Mr. Bargreen's property. Recommendation: Do not pursue installation of a liner at reservoir#4. Dargrecn