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2 <br />module arrays would be oriented along a north-south axis and mounted on sets of galvanized <br />steel racking to form a row or string (Figure 2). <br />Figure 2. Example of an assembled racking system. <br />The project would use a combination of galvanized I-beams, tubular steel posts, and channel <br />s t e e l r a i l s . I - b e a m / t u b u l a r s t e e l p o s t s w o u l d b e d r i v e n i n t o t h e s o i l u s i n g a <br />pile/vibratory/rotary driving technique similar to that used to install freeway guardrails. If <br />the subsoil on the Project does not have excessive rocks, posts will be installed without the <br />need for concrete foundations. I-beam/tubular steel posts are driven 12 to 18 feet into the <br />ground with about 5-6 feet exposed as in the example in Figure 3. Technicians, using <br />stepladders or working from the ground mount PV modules onto the racking system. <br />Each row will consist of about 60 PV modules mounted on the racking system. Each row will <br />have an opening in the middle to allow access for operation and maintenance activities. Each <br />row or string will be approximately 200 feet long, 8 to 12 feet wide, and approximately 20-30 <br />feet apart (Figure 4). A schematic of a typical 5 MW solar farm layout is shown in Figure 5.