WE HAVE A 12 MT. OLD HOME OCCUPIED BY 2 ADULTS AND 2 CHILDREN. WE USE APPROX 1200 - 1600 GALS OF WATER PER MONTH. SEPTIC SYSTEM CONSISTS OF 1000 GAL TANK WHICH SPILLS INTO A 250 GAL DOSSING TANK THAT CONTAINS An ELECTRIC PUMP TO PUMP LIQUID WASTE TO FIELD LINE. PUMP WILL PUMP APPROX 60 GALS AT EACH PUMP CYCLE. LEACH FIELD IS STANDARD PIPE IN CRUSHED GRAVEL. 318 FEET LONG AND NO DEEPER THAN 20" DUE TO ROCK AND CLAY TYPE SOIL. SOIL PERKS AT 60 MPG. ABOUT 2 WEEKS AGO DURING COLD SNAP WATER PERKED UP AT END OF LINE AND HAS BEEN MAJOR WET AREA EVER SINCE. THANKS!!