Comparison of Effluent Quality On the Transport of Fecal Coliform through Two SE PA Soils.

Primary septic tank effluent was applied to three full scale at-grade absorption ares at a rate of 400gpd on a deep, well drained soil.  Secondary effluent (30/30) was applied to three full scale at-grade absorption areas at a rate of 400gpd on a deep, some what poorly drained soil.  Two nests of four gravity lyisimeters where installed in each at-grade absorption area at a depth of 1,2,3 and 4 feet beneath the ground surface.  Monthly sampling of the lyisimters occured for for three years.  The samples were analyised for fecal coliform, fecal streptococcus, the nitogen series and total phosphorous.  This paper shall present the results of fecal coliform and fecal streptococcus renovation by a coarse-loamy,mixed,mesic Typic Hapludult and a fine-silty,mixed,mesic Aquic Fragiudalf.  A relative hazard ratio for comparative risk evaluation was determined for the parameters samlped in each system.