Laserfiche WebLink
SECTION 4 <br /> Year 5 Tree Monitoring Results <br /> ' This section provides the results of the Year 5 (2011) tree monitoring event. Monitoring was <br /> performed on November 15, 2011. The Year 5 (2011) tree monitoring results are presented <br /> below for each of the six tree planting sub areas. A tabular summary of tree survivorship <br /> and health and vigor data for Year 5 (2011) is provided in the table in Appendix A. A <br /> comparison of health and vigor and tree survivorship rates for Years 2007,2008, 2009,2010, <br /> and 2011 is presented in Tables 4-1 and 4-2. <br /> For details on 2007,2008, 2009,and 2010 tree survivorship and health and vigor ranks by <br /> planting sub area, refer to the Year 1, Year 2, Year 3, and Year 4 Phytoremediation Tree <br /> Monitoring Reports for the Source Area at the SFPP, L.P. Holt Release Site, Holt, California <br /> (CH2M HILL 2008a, 2008b, 2010a, and 2010b). <br /> Photographs of all planting sub areas were obtained during the annual tree-monitoring field <br /> visit to document tree system health and performance and are provided in Appendix B. For <br /> comparison,Appendix C contains photographs of site conditions prior to improvements in <br /> 2001 and of the planting areas during 2006 and 2007. The approximate location of the three <br /> planting zones is depicted in Figure 1-3. The location of the six tree planting sub areas is <br /> shown in Figure 1-4. <br /> TABLE 4-1 <br /> Tree Survivorship by Monitoring Year <br /> Year 1 (2007) Year 2(2008) Year 3(2009) Year 4(2010) Year 5(2011) <br /> Percent Percent Percent Percent Percent <br /> ' Planting Site Survivorship Survivorship Survivorship Survivorship Survivorship <br /> Area A 93% 88% 86% 93% 88% <br /> Addition to Area A 97% 100% 97% 100% 100% <br /> Area AA 96% 96% 96% 100% 100% <br /> Area B 90% 86% 96% 96% 96% <br /> Area C 80% 80% 93% 93% 87% <br /> Area D 78% 82% 80% 78% 76% <br /> Average Percent <br /> Survivorship(All 90%* 90%* 91% 93% 91%* <br /> Sites) <br /> NOTES: <br /> *The average Year 2(2008)survivorship rate is 89.6 percent(rounded in Table 4-1 and Appendix A to 90 <br /> percent). <br /> This is essentially the same as observed in Year 1 (2007). The overall survivorship rate in 2007 was 89.5 <br /> percent. <br /> Limited tree replanting was conducted in 2007 and 2008. Replanting caused survivorship averages in some parts <br /> - of the site to increase between Years 1 through 3. <br /> In planting areas Addition to Area A and Area A,trees that were damaged in the 2009 windstorm and counted as <br /> SACI4203071113570001 IYEAR5-2011 HOLTTREE_MONITORING-REPORT-FINAL.DOCxI 4-1 <br />