SU0012939 SSNL - Laserfiche WebLink

Home Browse Search

October 12,2000 Joh Number:LG00-312 Page 7 Soil Name and Depth(in) Unified Soil Salinity Soil Septic tank - Map Symbol Classification mmhostcmx Reaction absorption' PH fields Jahant loam,0 0-16:.Loam. CL-ML,MI.. .<2 5.6=6.5 Severe:peres to 2 percent loan i,Clay loa ,clay. CL <2 6.1�.8 slowly. slopes,241 26-60:Indurated -` Note: The table descriptions do not necessarily reflect site-specific soilproperties. Twenty-two (22) shallow borings were drilled and completed for percolation'tests by Neil O. Anderson&Associates, Inc. to characterize the subsurface and locate a suitable site for the proposed septic fields in the parcels. Most of the drilling landed in a permeable material between the depths of 3 to 25-feet. Several borings were drilled and did not encounter suitable material on the first try. In these few cases,the borings were re-located 10 to 10(3-feet from the first !' boring and eventually encountered suitable material(see Plates 11 to 32 for boring information). Generally the sediments observed at the lower elevations(borings 5-11 and boringsl7-22) of the site consisted of a dark, often organic sandy surface clay, generally about 1-foot thick. Located below the surface layer was occasionally a l.to 2-feet thick, cemented silty"hardpan" layer to a total depth of about 2-feet. Located below the hard pan layer were lenses of sand and silt often containing clay mixtures. Generally the sediments ranged in composition, thickness, and depth throughout the site. The sand, silt, and clay mixtures encountered along the lower elevation sites often ranged between a few feet to about 10-feet in thickness. The original depositional environment appears to be fluvial(river/stream)environment. The higher elevations(borings 14 and borings 12-16)were composed of slightly different materials and consisted of generally sandy soils most often contained a matrix of finer grained material like silt or clay. Generally the sediments ranged in thickness, depth and composition throughout the site. These soils can be found at higher elevations and contain layers usually under 11-feet thick. The original depositional environment of this area also appears to be river/stream environment. For each of the twenty-two (22) parcels, a percolation test was performed to demonstrate each parcel's capacity for soil percolation for use with an on-site septic system. For eighteen L81 of�the,twin -two 22 ,p eels, th of the test was deters,,,ettsn the casin acent to the most P trmeable material (usually sand)found to a max=nn epo tt 25-feeet. r 4 O w r