This appendix sets forth the standards employed by the agency in the review of the type and manner of installation of onsite wastewater treatment systems associated with a project which are designed to treat less than 1,000 gallons of wastewater per day.

These standards are applied in addition to those standards set forth in “Wastewater Treatment Standards – Residential Onsite Systems”, Appendix 75-A, Title 10, of the Official Compilation of Codes, Rules and Regulations of the State of New York.

1. The natural ground intended for the leaching facility of an onsite wastewater treatment systems shall have a minimum depth of four feet of usable soil above bedrock, impervious material, or maximum high seasonal groundwater. When fractured bedrock is encountered, the usable soil depth shall be at least six feet.

2. Within 200 feet of the shoreline of a lake, pond, river or stream, if the soil percolation rate is 0 to 3 minutes per inch, a leaching facility for an onsite wastewater treatment system will not be permitted.

3. Precatory or hortatory language such as “should” in “Wastewater Treatment Standards – Residential Onsite Systems”, Appendix 75-A, Title 10, of the Official Compilation of Codes, Rules and Regulations of the State of New York shall be deemed to be mandatory; provided that the agency may approve modifications in the course of its review of individual projects.