SU0004305 SSNL - Laserfiche WebLink

Home Browse Search

C. Soil Analytical Chemical Test Results Soil samples for analytical testing were retrieved from the depths referenced above. The attached Soil Analysis Report illustrates the test results. Analyzed constituents relating to nitrate loading include the organic matter content of the soil, pH, Cation Exchange Capacity(CEC), and the nitrate-nitrogen content. The organic matter is low, i icatinv low contribution of nitrogen release. The pH is somewhat acidic at the surface but alkaline at the deeper depths This alkalinity appears to have influenced nitrification positively. The CEC indicates the soil potential to retain ammonium molecules that are found in septic system effluent. The CEC has a high potential to inhibit nitrification, and is generally high. Of significance is the nitrate-nitrogen concentrations at each depth revealing a high concentration at 5 feet,but significantly decreasing throughout the deeper depths. This may be attributable to denitrification. The Table below summarizes the important soil parameters analyzed: TABLE i SUMMARY OF SOIL ANALYSIS DEPTH OF SAND SILT CLAY SOIL DENSITY USDA/USCS NITRATE-N t� SAMPLE % % % SOIL TEXTURES CONTENT MEN ME 5 Ft 21% 42% 36% 19 Blows/Ft Clay LoaMSilty Lean Clay 51 ppm 1 Stiff Density 10 Ft 27% 36% 36% 43 Blows/Ft Clay LoaMSilty Lean Clay 8 ppm Very Hard Density 15 Ft 39% 360%� 24% 18 Blows/Ft Loam/Silt 5 ppm Medium Density 20 Ft 250% 180/,. 1 8 Blows/Ft Silt Loam/Silt 9 ppm Loose Density III. GROUNDWATER TEST RESULTS The depth to the water table was measured in the exploratory boring to be approximately 22 feet below existing grade(from the W of the embokment). It is evident that groundwater directional flow is in an east direction- toward the lake - since sand is being excavated from the floor of the lake, which is drawing groundwater into the lake. Groundwater flow under the embankment, which can be considered a dam, is complex and can best be described by flow nets which depict flow under the weight of the embankment. It is our understanding that the water source for the toilet will come from the Brown Sand Office well,which is on the same parcel as the subject business. Consequently, this domestic water supply was tested for analysis, with the results discussed below. Bottled drinking water will be provided in the office. Hand washing will consist of"waterless"hand cleaners that are both antibiotic and formulated for grease removal(e.g., GoJo Hand Soap). Page-4- Chesney Consulting