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Drain Gauge User's Manual <br />2. Installing the Drain Gauge <br />Method 2 Intact Soil Monolith method): <br />1. Set the DCT containing the intact soil monolith onto <br />the diatomaceous earth that was applied on top of the <br />fiberglass fabric, on top of the wick section plate. <br />MOP <br />f <br />0 0" o 0 <br />Figure 9: DCT installation, filled with intact soil monolith <br />2. Backfill and pack the soil around the outside of the <br />DCT. <br />3. Place and pack the soil from the root zone. You may <br />want to mound additional soil on top of the drain <br />gauge to compensate for soil settling. Replace the <br />cover vegetation, if desired. Some users keep subsur- <br />face soil moist and allow it to settle for a week prior to <br />replacing the topsoil and vegetation. <br />Post -Installation Warning <br />To reduce the amount of time until the soil equilibrates <br />back to a more natural state, many users moderately irri- <br />gate the Drain Gauge immediately after installation. If you <br />wish to do this, make sure not to irrigate too heavily and <br />too quickly. Over -irrigation of unconsolidated soil can <br />cause preferential flow of solids down the PVC tube, <br />which fills the gravel with fine sediments that can retard <br />drainage from the Drain Gauge's overflow port. In <br />10 <br />