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L <br /> LSECTION 2 <br /> L Tree System Overview <br /> t <br /> LThis section provides an overview of the phytoremediation system.Trees were planted in <br /> six sub areas: Areas A,Addition to Area A,AA,B,C and D. The phytoremediation system <br /> L was installed in two phases: the first occurring in January/February 2005, and the second in <br /> April/May 2006. Work was performed in accordance with the Phytoremediation Cleanup <br /> Plan(CH2M HILL,2004). Tree and irrigation system installation were documented in <br /> L two as-built reports that were submitted to the RWQCB (CH2M HILL 2005;CH2M HILL <br /> 2007).Tree Monitoring results for Years 1,2 and 3 were reported in the Year 1, Year 2,and <br /> Year 3 Phytoremediation Tree Monitoring Reports for the Source Area at the SFPP, L.P. Holt <br /> Release Site,Holt, California (CH2M HILL 2008a,2008b, 2010). <br /> L <br /> 2.1 Size and Location of Phytoremediation Areas <br /> L The phytoremediation area,as constructed,is shown in Figure 1-4. The phytoremediation <br /> area is subdivided into six sub areas: Areas A,Addition to Area A,AA, B,C,and D.The <br /> criteria used to develop these areas included maximizing plant coverage within the affected <br /> Larea to the northwest of Whiskey Slough Road while maintaining vehicle access to the roads <br /> along the current and former SFPP pipeline alignments. <br /> LTable 2-1 lists the approximate size of each phytoremediation area. <br /> TABLE 2.1 <br /> Approximate Sizes of Phytoremediation Areas <br /> 6" Planting Area Approximate Size(acres) Included In Cleanup Plan <br /> Area A 0.13 Yes <br /> Addition to Area A 0.19 No—Area added during implementation <br /> Area AA 0.01 Yes <br /> ` Area B 0.06 Yes <br /> Area C 0.07 Yes <br /> ` Area D 0.26 Yes <br /> Approximate Total Acreage 0.76 <br /> L NOTE: <br /> Cleanup Plan refers to the following reference—Cleanup Plan Using Phytoremediation for the Source Area at <br /> the SFPP, L.P. Holt Release Site, Holt, California(CH2M HILL, 2004). <br /> L <br /> 2.2 Tree and Irrigation System Installation <br /> LDuring Construction Season 1 Qanuary/February 2005),a total of 173 trees were planted <br /> within Areas A,AA, B, and the Addition to Area A. An additional 65 trees were installed in <br /> SAC/166749/103500001(YEAR4-2010_HOLTTREE_MONITORING REPORT-FINALDOU) 2-1 <br /> L <br />