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SECTION 2 <br /> Tree System Overview <br /> ' This 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 /> 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 /> two as-built reports that were submitted to the RWQCB (CH2M HILL 2005;CH2M HILL <br /> 2007).Tree Monitoring results for Years 1,2,3,4,and 5 were reported in the Year 1, Year 2, <br /> Year 3, Year 4,and Year 5 Phytoremediation Tree Monitoring Reports for the Source Area at the <br /> SFPP, L.P. Holt Release Site, Holt, California (CH2M HILL 2008a, 2008b,2010a,2010b,and <br /> 2011). <br /> 2.1 Size and Location of Phytoremediation Areas <br /> 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 /> area to the northwest of Whiskey Slough Road while maintaining vehicle access to the roads <br /> along the current and former SFPP pipeline alignments. <br /> Table 2-1 lists the approximate size of each phytoremediation area. <br /> TABLE 2-1 <br /> Approximate Sizes of Phytoremediation Areas <br /> 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 0.08 Yes <br /> Area C 0.07 Yes <br /> Area D 0.28 Yes <br /> Approximate Total Acreage 0.76 <br /> 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 (CH21VI HILL, 2004). <br /> ' 2.2 Tree and Irrigation System Installation <br /> During Construction Season 1 (January/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 /> zi <br />