New York Codes, Rules and Regulations › Title 10 - DEPARTMENT OF HEALTH › Chapter - APPENDICES › Appendix 5-D › Table 1 - Required Minimum Separation Distances to Protect Public Water Supply Wells From Contamination

Current through Register Vol. 46, No. 28, July 10, 2024
Contaminant
								Source
Distance (Feet)
								1
Chemical storage sites not protected from the
								elements (e.g., salt and sand/salt storage)
								2
300
Landfill waste disposal area, or hazardous or
								radiological waste disposal area 2
300
Land surface application or subsurface injection of
								effluent or digested sludge from a municipal or public wastewater treatment
								facility
300
Land surface application or subsurface injection of
								septage waste
300
Land surface spreading or subsurface injection of
								liquid or solid manure 3
200
Storage areas for manure piles
								3
200
Barnyard, silo, barn gutters and animal pens
								3
200
Cesspools (i.e., pits with no septic tank
								pretreatment)
200
Wastewater treatment absorption systems located in
								coarse gravel or in the direct path of drainage to a well
200
Fertilizer and/or pesticide mixing and/or clean up
								areas
200
Seepage pit (following septic tank)
200
Underground single walled chemical or petroleum
								storage vessels
200
Absorption field or bed
200
Contained chemical storage sites protected from the
								elements (e.g., salt and sand/salt storage within covered structures)
								4
200
Septic system components
								(non-watertight)
200
Intermittent sand filter without a watertight
								liner
200
Sanitary privy pit
200
Surface wastewater recharge absorption system for
								storm water from parking lots, roadways or driveways
200
Cemeteries
200
Sanitary privy with a watertight vault
200
Septic tank, aerobic unit, watertight effluent line
								to distribution box
100
Sanitary sewer or combined sewer
50
Surface water recharge absorption system with no
								automotive-related wastes (e.g., clear-water basin, clear-water dry
								well)
None5
Stream, lake, watercourse, drainage ditch, or
								wetland
None5
All known sources of contamination otherwise not
								shown above
200
Notes for Table 1:
1 The listed water well separation
				  distances from contaminant sources shall be increased by 50% whenever aquifer
				  water enters the water well at less than 50 feet below grade. If a 50% increase
				  in separation distances can not be achieved, then the greatest possible
				  increase in separation distance shall be provided with such additional measures
				  as needed to prevent contamination.
2 Water wells shall not be located
				  in a direct line of flow from these items, nor in any contaminant plume created
				  by these items, except with such additional measures (e.g., sentinel
				  groundwater monitoring, hydraulic containment, source water treatment) as
				  needed to prevent contamination.
3 Water wells may be located 100
				  feet from temporary (30 days or less) manure piles/staging areas that are
				  controlled to preclude contamination of surface or groundwater or 100 feet from
				  otherwise managed manure piles that are controlled pursuant to regulation in a
				  manner that prevents contamination of surface or groundwater. Wells serving
				  public water systems may be located 100 feet from temporary barnyards, silos,
				  barn gutters, or animal pens that are similarly controlled to prevent
				  contamination of surface or groundwater.
4 Chemical storage sites as used
				  in this entry do not include properly maintained storage areas of chemicals
				  used for water treatment.
5 Wells serving public water
				  systems may be located near water bodies or surface water recharge systems but
				  are subject to monitoring to determine if groundwater at the point of
				  withdrawal is directly influenced by surface water and corresponding treatment
				  requirements. Such wells must also be protected from floodwater pursuant to
				  subdivision 5-B.2(b) of this Part.