SU0011765 SSNL - Laserfiche WebLink

Home Browse Search

r�2 The pH of the soil is alkaline at the anticipated soil-effluent interface which has a positive effect in promoting ammonia and not the nitrate substrate ammonium within the alkaline soil environment. The CEC measures the ability of the soil to theoretically trap and hold ammonium molecules. The CEC illustrates a medium potential for the clay soil to retain ammonium molecules that remain as ammonium and are not converted to ammonia in the soil environment. Nitrification is also hindered due to the alkaline pH and from the anaerobic micro-sites within the clay soil. NLS§3.3, SSS§5.3, 5.4. Table 1 below summarizes the soil physical and chemical characteristics that influence nitrate loading: TABLE 1 SOIL PROFILE CHARACTERISTICS AND ANALYTICAL TEST RESULTS SAMPLE DEPTH AND.. SOIL SOIL NITRATE- pH AND (SAMPLE NUMBER O CLASSIFICATION NITROGEN CONTENT CATION EXCHANGE CAPACITY TEST RESULT FORM) In meq/1008 36 IN DEPTH(P136) Sandy Loam 1 ppm NO3 N 7.8 9.3 meq/100g Parcel 1,36 in.Depth 20 FT DEPTH(P420) Clay f 3 ppm NO,-N 7.0 16.8 meq/100g Parcel 4,20 ft Depth C. PERCOLATION TEST RESULTS SSS§ 6.2. To assess the permeability of each proposed Parcel, all perc test borings and the one exploratory boring, were drilled with a truck mounted drill rig. Shallow perc tests were drilled to 42 inches in depth which is the maximum leachline depth. The deep perc tests were drilled to depths where what appeared to be permeable soil. However, from all deep test results and the exploratory boring,the deeper soil under the property has limited permeability. The test borings were completed in the locations depicted on the Site Plan found in Appendix D. SSS§ 6.3. After drilling,the sidewalls of the shallow borings were scored with a pry-bar to open potentially smeared soil surfaces that may have occurred due to the clay soil. The de rings could not be scored,which may also explain some of the impermeability observed. Two inch f fine gravel was placed at the bottom and three-inch perforated PVC pipe was inserted boring. After these pro duces, the borings were pre-saturated wi 12 inche�f water approximatel��s 'or to the start of testing. SSS§ 6.4,6.5. On March 5, 2018, percolation testing commenced for Parcels 1 and 2, with Parcels 3 and 4 tested the next day. Table 2 below illustrates the applicable perc test data, along with corresponding Application Rates in gallons of effluent accepted per square foot of soil per based upon the perc rate obtained. The test results indicate only one test boring had an acceptable rate after complete soil saturation. A perc rate of 60 min/inch or faster is considered acceptable for shallow test borings and 30 min/in for deeper test borings. Page -3- Chesney Consulting