1. 
   On-Site Facility
   A hazardous waste treatment, storage or disposal area that is located on the generating site.
   Found op http://www.epa.gov/OCEPAterms/
   
   
2. 
   Onsite sewage facility
   On Site Sewage Facilities (OSSF) are wastewater systems designed to treat and dispose of effluent on the same property that produces the wastewater. A septic tank and drainfield combination is the oldest and most common type of OSSF, although newer aerobic and biofilter units exist which represent ...
   Found op http://en.wikipedia.org/wiki/Onsite_sewage_facility
   
   

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