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minutes. Logs of profile test pits, TP-9 through TP-12 are included on Fig. 5. A <br />summary of site, profile test pit and percolation test data is provided below. Results of <br />percolation testing are included in Figs. 13 through 20. <br />Summary <br />Following is a summary of the conditions identified at each location tested, <br />including our opinion of whether a registered engineer prepared system design may be <br />required by the Mesa County Health Department. <br />Lot 6. TP-9: P-9 at 0 and 3 feet <br />Subsurface conditions consisted of 10 feet of silty, sandy clay.. No free <br />groundwater was encountered. We estimate a high seasonal groundwater level of 6 <br />feet depth. The nearest identified water source was the canal more than 150 feet <br />northwest and a natural drainage more than 60 feet northeast. The canal and drainage <br />were dry at the time of our visit. The silty, sandy clay soils were tested. The tops of the <br />percolation holes were approximately 0 and 36 inches below the ground surface. <br />Measured percolation rates (Figs. 13 and 14) averaged from approximately 13 minutes <br />