LOCATION (all tanks)
Position of tank in relation to drinking water well	Tank downslope more than 100 feet from well in medium- or fine- textured soils (silt loam, loam, clay loams, silty clay) with low per - meability. ***	Tank at grade or upslope more than 100 feet from well in medium- or fine - textured soils (silt loam, loam, clay loams, silty clay) with low per - meability. ***	Tank downslope more than 100 feet from well in coarse - textured soil (sands, sandy loam) with high per - meability. ***	Tank at grade or upslope less than 100 feet from private well, 200 feet from public well**in coarse - textured soil (sand, sandy loams) with high per - meability. ***
Tank location and local land use (leakage potential)	Well - drained soils. Water table always beneath tank. Above - ground tank more than 50 feet from buildings.	Moderately well - drained soils. Only occasionally high water table.	Located more than 50 feet from buildings. Medium - or fine - textured soils (silt loams, loam, clay loams, silty clay) saturated seasonally.	Located near buildings and in area with fine - textured soils (clay loams, silty clay) often saturated.
DESIGN AND INSTAL - LATION (all tanks)
Type and age of tank / corrosion protection	Synthetic tank or tank protected from rust by cathodic protection.	Steel tank less than 15 years old, coated with paint or asphalt.	Coated steel tank 15 or more years old. OR bare steel tank less than 15 years old.	Bare steel tank 15 or more years old.
Spill and tank overfill protection	Im - permeable catch basin plus automatic shutoff.	Im - permeable catch basin plus overfill alarm.	Im - permeable catch basin or concrete catch pad.	No pro - tection. *
Piping	Piping protected from rust by cathodic protection and isolated from tank, sloped back to tank. Check valve at pump (not at tank).	Piping galvanized but not isolated from tank. Pipe drains back to tank. Check valve at pump.	Pipe galvanized, not isolated or bare. Piping sloped back to tank, but check valve is located at tank (foot valve).	Piping and tank isolated and of dissimilar materials. Unisolated pipe bare, cannot drain freely to the tank. All pressure pipe systems.*
Tank installation	Installed by state - certified installer.	Installed according to recom - mendations provided with new tank by seller.	No information on installation.	Installed without backfill, setback, secondary con - tainment, anchors and other protections, or by untrained individual.*
DESIGN AND INSTAL - LATION (above - ground tanks only)
Tank enclosure	Tank surrounded by 6-foot tall non - combustible building or fence with lock. Building well - ventilated. Fire - wall in place if setbacks do not conform to code.	Tank surrounded by low fence with lock. Fire wall in place if setbacks do not conform to code.	Tank surrounded by low fence. No lock. No firewall.	No enclosure.
Secondary con - tainment	Tank placed within concrete or synthetic dike with pad able to hold 125% of tank capacity.	Tank placed within dike and pad made of low per - meability soils, ** able to hold 125% of tank capacity. ***	Tank placed on pad.	No secondary con - tainment.
MONI - TORING (all tanks)
Tank integrity testing and leak detection mon - itoring	Regular (monthly) leak mon - itoring.	Daily inventory control and annual tank tightness testing.	Occasional inventory control and annual tank tightness testing.	No inventory control, testing or mon - itoring.*
TANK CLOSURE (under - ground tanks)
Unused tank	Tank taken from ground. Excavation checked for evidence or con - tamination.	Tank filled with inert material and excavation checked for evidence of leaking.	Tank removed or filled with inert material. Excavation not checked for con - tamination	Tank left in ground (illegal after 12 months).

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