Marginal note:Selection of fenceline
18 The operator may select either the property boundary of the facility or an internal monitoring perimeter as the fenceline for the purpose of the fenceline monitoring program. If an internal monitoring perimeter is to serve as the fenceline, it must be established in accordance with sections 8.2 to 8.2.3.2 of EPA Method 325A, except that tailings ponds and mining areas are to be excluded from the emission sources encompassed by the fenceline.