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Replacement Costs. Although costs vary according to the size of the leach field, soils and costs of local permits, expect to pay between $5,000 and $20,000 for leach field replacement.It is the most expensive component of the septic system.eplacement Costs. Although costs vary according to the size of the leach field, soils and costs of local permits, expect to pay between $5,000 and $20,000 for leach field replacement.
While FieldTurf says that an artificial field may initially cost more, the company said the field costs just $5,000 a year to maintain, compared with an estimated $52,000 for a natural grass field.hile FieldTurf says that an artificial field may initially cost more, the company said the field costs just $5,000 a year to maintain, compared with an estimated $52,000 for a natural grass field.