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Local Upgrade Approval - Variations of Title 5 that allow system owners to
upgrade a nonconforming system to the maximum extent feasible (310 CMR
15.401-405). See Form 9B.
Long Term Acceptance Rate (LTAR) - Stable rate of effluent acceptance
through the biological mat of a soil absorption system measured in gallons per
day per square foot (gpd/sf) (310 CMR 15.242).
L