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r��NLS§ 5.3 Table 1 below summarizes the subsurface soil characteristics encountered from the <br /> sample depth, 42 inches below grade: <br /> TABLE 1 <br /> SOIL PROFILE CHARACTERISTICS AND <br /> ANALYTICAL TEST RESULTS <br /> SAMPLE DEPTH SOIL NITROGEN CATION EXCHANGE pH AND CEC SOIL <br /> CONTENT CAPACITY CLASSIFICATION <br /> 42 Inch Depth 7.0 ppm NO,N 8.3 meq/100g 6.2 8.3 Sandy Loam <br /> C. PERCOLATION TEST RESULTS <br /> SSS§ 6.2. To assess the permeability of the on-site soils, one percolation test boring was completed <br /> in the proposed location of the future filter bed disposal area as depicted in the Site Plan found in <br /> Appendix A. The perc test depth at 42 inches below existing grade gives a detailed observation of <br /> subsurface permeability from approximately 36 to 42 inches in depth. <br /> SSS§ 6.3. On August 9, 2021, the perc test boring was drilled in the referenced location. The <br /> sidewalls of the borings were scored with a pry-bar to open potentially smeared sidewalls and the <br /> cuttings removed. Two inches of pea gravel was placed at the bottom and a three-inch perforated <br /> PVC pipe was inserted in the boring. The test boring was pre-saturated with 12 inches of water 24 <br /> hrs before the start of testing. <br /> SSS§ 6.4, 6.5. On August 10, 2021, percolation testing commenced. No standing water was <br /> observed after the 24-hr soak period. EHD Perc Test Procedure #2 was conducted in which testing <br /> was done over a four-hour period to induce maximum soil saturation. The test results indicate a perc <br /> rate of 16.7 minutes per inch (min/in). A summary of the perc test results with corresponding <br /> application rates in gallons of effluent accepted per square foot of soil, per day are found in Table 2: <br /> TABLE 2 <br /> PERCOLATION TEST RESULTS FOR THE DISPOSAL AREA WITH <br /> CORRESPONDING APPLICATION RATES IN GALLONS /FTS/DAY <br /> 42 INCH DEEP PERC TEST BORING 16.7 min/inch / 0.700 gallons/ft`/day <br /> PERCOLATION RATE/APPLICATION RATE <br /> Application Rates adapted from: Water Quality Control for Siting,Design,Operation and Maintenance of On-site Wastewater Treatment Systems <br /> D. GROUNDWATER INFORMATION <br /> NLS§ 2.1, SSS§ 4.1. Groundwater depths and elevations throughout San Joaquin County are <br /> illustrated on maps published by the County Flood Control and Water Conservation District. <br /> 3 <br /> Chesney Consulting <br />