Resource Concern	Rank 4	Rank 3	Rank 2	Rank 1
Quantity of wastewater	Con - servative water use (less than 20 gallons per person per day). Good Main - tenance of water - conserving fixtures. Whole house use is less than design capacity.*	Moderate water use (20 - 60 gallons per person per day). Fair Main - tenance of fixtures. Some water conservation fixtures. Water softener recharges twice a week or less. Whole house use is near design capacity.*	High water use (60 - 120 gallons per person per day). Poor Main - tenance of fixtures. Water softener recharges more than twice a week. Whole house use occasionally exceeds design capacity.*	Excessive water use (greater than 120 gallons per person per day). Leaking fixtures. No water - conserving fixtures. Whole house use frequently exceeds design capacity.*
Quality of wastewater
Settleable solids	No use of garbage disposal unit in kitchen sink.	Minimal use of garbage disposal unit (1 - 2 times per week).	Moderate use of garbage disposal unit (3 - 5 times per week).	Daily use of garbage disposal unit.
Dissolved solids	Minimal use of household chemicals (cups per week). No disposal of solvents and toxic cleaning agents. No water softener, or not recharged on site.	Careful use of household chemicals (pints per week). Minimal disposal of solvents and toxic cleaning agents. Water softener used, recharged on site.	Moderate use of household chemicals (quarts per week). Moderate disposal of solvents and toxic cleaning agents.	Extensive use of household chemicals (gallons per week). Extensive disposal of solvents and toxic cleaning agents.
Floatable solids	No disposal of grease or oils into sewer. Domestic wastes only.	Minimal disposal of grease or oils. Oil and grease wiped from cooking utensils before washing.	Moderate disposal of grease or oils. No attempt to reduce disposal of grease and oil from household, but little generated.	Extensive disposal of grease or oils.
Collection of wastewater	All wastewater collected for treatment. No clear water collected. No leakage loss of water that should be treated. No settling of soil near tank or collection system. Collection system (pipe) more than 50 feet from well.	All wastewater collected for treatment. Some clear water collected. No leakage loss of water that should be treated.	Some wastewater diverted, and clean water infiltration. Some leakage of water that should be treated.	Clear water infiltration. Leakage loss of water that should be treated. Collection system (pipe) less than 50 feet from well.**
Pre - treatment system:
Cesspool OR				Any cesspool or direct discharge of water.
Septic tank OR		Serial tanks or added solids retention system. No leakage. Pumped at least every 3 years and maintained. Baffles checked. Tanks checked; no leakage.	Single tank. Pumped at 4-6 years intervals.	Leakage losses. Pumped at greater than 7 - year interval. Less than 50 feet from well.** Less than 4 feet from saturation or bedrock.
Packaged aerobic system OR	Maintenance program followed. Loaded at less than design capacity.*	No mechanical failures. Loaded near design capacity.*	Occasional failures.	Frequent system failure. Load exceeds design capacity.*
Holding tank	Not filled to capacity at usual pumping interval. More than 50 feet downslope from well. No leakage.	Filled to capacity at pumping interval. More than 50 feet upslope from well. No leakage.	Occasional overflow or leakage.	Less than 50 feet from well. ** Leakage losses. Upslope from well.
Additional treatment (all systems)	Aeration, de - nitrification, filtration and dis - infection.	Aeration and / or de - nitrification.	Filtration and / or dis - infection.	No additional treatment.
Disposal of wastewater
Subsurface application (septic system or other treatment systems) OR	Offsite disposal.	Pressure or gravity-fed distribution to trench system.	Bed or seepage pit.	Field or silo tile drainage system. Pipe to surface.
Surface disposal system (constructed wetlands, evaporation beds)	Offsite disposal.	Well maintained, no overflow or leakage.	Some leakage, little Main - tenance.	Liner badly damaged or not present, leakage losses . No Main - tenance.
Horizontal separation of wastewater disposal site from water supply (subsurface or surface)	Offsite disposal.	Subsurface disposal downslope more than 100 feet from private well, more than 200 feet from public well.	Subsurface disposal downslope less than 100 feet from private well, less than 200 feet from public well.	Upslope from well.
Vertical separation of wastewater disposal site from water supply (subsurface)	Offsite disposal.	More than 6 feet to saturated soil, coarse material (gravel) or bedrock.	More than 4 feet to saturated soil, coarse material (gravel) or bedrock.	Less than 4 feet to saturated soil or bedrock.
Application rate (subsurface or surface disposal)	Offsite disposal.	Below design capacity.	At design capacity.	Above design capacity.
Soils	Offsite disposal.	Medium - or fine - textured soils (silt loam, loam, clay loams).	Medium - to coarse - textured soils (sandy loam, sands).	Very coarse sands or gravel.

July 23, 1998
Dennis Hoffman, Project Leader
Steve Dagitz, Webmaster