Not long ago, Brian Horne, owner of SLRD Company Mullica Hill LLC, bought the Henry Harris Landfill in New Jersey for $10. The site’s waste operations were ceased in 1980. Horne, a 25-year veteran of landfill remediation, hopes to build an outlet mall or business park on the 50-acre site. But he’ll first need to add a $3 million geosynthetic cap, amend tears in the the old liner, and address local concerns over disturbance and disposal of site soils.