ARCHIVED REPORTS 2011 YEAR 5 PHYTOREMEDIATION TREE MONITORING REPORT

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ISECTION 3 Tree System Monitoring Methodology This section provides an overview of the methodology used to perform the tree system monitoring. In addition,an overview is provided of site maintenance activities performed to assure that the tree system is healthy and vigorous. 3.1 Tree Monitoring 3.1.1 Monitoring Schedule Plant-survivorship monitoring of all planted trees was conducted as shown in Table 3-1. Tree monitoring was conducted for a period of 5 years following installation of the phytoremediation system as described in the Phytoremediation Cleanup Plan.The objective of the tree monitoring is to determine if trees have successfully established and survivorship goals have been achieved. Monitoring consists of annual plant survivorship counts, a health and vigor assessment, and photo documentation. Annual reporting is a requirement of tree monitoring. Annual tree monitoring was undertaken in late fall or early winter of each calendar year per the schedule outlined in Table 3-1. TABLE 3.1 Schedule of Monitoring and Reporting Activities Year 1 Year 2 Year 3 Year 4 Year 5 Tree Monitoring Activity 2007 2008 2009 2010 2011 5s,,. Plant Establishment Monitoring' I M-W1111 Plant Establishment Reporting° Post Plant-Establishment Monitoring' Post Plant-Establishment Reporting° Final 5-Year Evaluation and Reporting` e 'Field work to be conducted in summer or fall of each monitoring year. °Reports to be submitted to RWQCB by the end of each monitoring year. nhe final 5-year evaluation report will be included as part of the 5-year monitoring and reporting effort. ' As shown in Table 3-1, two types of tree monitoring have either been completed or are underway: (1) plant-establishment monitoring,and (2) post plant-establishment monitoring. Plant-establishment monitoring was conducted for 3 years following tree installation (as shown in Table 3-1). Post plant-establishment monitoring was completed in Year 4 (2010). The final 5-year evaluation monitoring was performed in 2011. These findings are the subject of this report. SAG420307I113570001(YEAR5-2011 HOLTTREE_MONITORING—REPORT-FINAL.000X) 3-1