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SOIL PERMEABILITY RESULTS AND SOIL CHEMICAL TESTING <br />To assess the permeability of the existing shallow and deep disposal area soils, three percolation <br />test borings were completed as illustrated on the aerial photo in Appendix F. The shallow boring <br />at the 36 inch depth is representative of the permeability occurring at leachline depths. The 10 ft <br />boring depth represents permeability at a typical sump structure depth. The 25 ft exploratory <br />boring was converted to a 25 ft deep percolation test boring after soil sampling procedures were <br />completed to measure percolation at the seepage pit depths. <br />After drilling, the sidewall of the shallow boring was scored with a pry -bar to open potentially <br />smeared soil surfaces and the cuttings removed. Two inches of pea gravel was placed at the <br />bottom of all three borings and a three-inch perforated PVC pipe was inserted to prevent cave-ins. <br />The borings were pre -saturated with 12 inches of water approximately 24 hrs prior to the start of <br />testing. <br />On November 3, 2021, percolation testing commenced. No standing water was observed in the <br />test borings after the 24 -hr soak period. Consequently, EHD Perc Test Procedure #2 was <br />conducted for the test borings. Testing was done over a four-hour period to induce maximum soil <br />saturation. <br />A summary of the perc test results with corresponding application rates in gallons of effluent <br />accepted per square foot of soil per day, are illustrated below: <br />TABLE 2 <br />PERCOLATION TEST RESULTS WITH CORRESPONDING <br />APPLICATION RATES IN GALLONS / FT'/ DAY <br />36 INCH PERC TEST <br />0.0 min/inch / 0.0 gallons/ft`/day <br />10 FT PERC TEST <br />83.3 min/inch / 0.123 gallons/ft'/day <br />25 FT PERC TEST <br />62.5 min/inch / 0.190 gallons/ft`/day <br />Page -3- <br />Chesney Consulting <br />