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F <br /> e 23-ft depth indicates a nitrate concentration -24x the shallow soils. It appears that nitrogen- <br /> ed fertilizer applications and nitrate formation from agricultural production activities on the soil <br /> surface have percolated through the sandier soils above and congregated on the tight loam soil with a <br /> high silt content and slow permeability. <br /> NLS§3.3, SSS§ 5.3, 5.4. Table 1 below summarizes the analyzed soil physical and chemical <br /> characteristics from the retrieved soil samples: <br /> TABLE 1 <br /> SOIL PROFILE CHARACTERISTICS AND <br /> ANALYTICAL TEST RESULTS <br /> SAMPLE I.D.DEPTH SOIL TEXTURE SOIL NITRATE- pH AND <br /> CLASSIFICATION NITROGEN CONTENT CATION EXCHANGE CAPACITY <br /> In meq/1008 <br /> 40" DEPTH Sandy Loam 2 ppm NO;-N 7.8 6.0 meq/1008 <br /> (SM,CL) <br /> 13 FT DEPTH Loamy Sand 2 ppm NO;-N 8.2 4.5 meq/1008 <br /> (SM) <br /> 23 FT DEPTH Sandy Loam 47 ppm NO,-N 7.5 7.4 meq/1008 <br /> (SM,ML) <br /> C. PERCOLATION TEST RESULTS <br /> SSS§ 6.2. The aforementioned percolation test borings were completed in the location depicted on <br /> the attached Site Plan to assess the permeability of the disposal area soils. <br /> SSS§6.3. After drilling the shallow test boring,the sidewalls were scored with a pry-bar to open <br /> potentially smeared sidewalls. The deeper 10.5 ft boring was not scored due to depth and the soil <br /> structure. Two inches of fine gravel was placed at the bottom and a three-inch dia.perforated PVC <br /> pipe was inserted in each test boring. After drilling,the test borings were pre-saturated with 12 <br /> inches of water, 24 hrs prior to the start of testing. Maximum soil saturation conditions were <br /> achieved to determine the saturated permeability of the two different soil structures encountered. <br /> SSS§ 6.4, 6.5. On April 2, 2021,percolation testing commenced at 0700 hrs. No standing water <br /> was observed after the 24-hr soak period in either boring. Consequently, EHD Perc Test Procedure <br /> #2 was conducted whereby testing was done over a four-hour period with readings taken every 30 <br /> minutes. <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 in Table 2. The corresponding application rate <br /> was obtained from Page 24 of the OWTS Policy- Water Quality Control Policy for Siting. Design, <br /> Operation, and Maintenance of Onsite Wastewater Treatment Systems. <br /> 3 <br /> Chesney Consulting <br />