The owner or operator must conduct sampling along the facility property boundary and analyze the samples in accordance with paragraphs (a) through (g) of this section.
Where:
[DELTA] ci = The fenceline concentration, corrected for background, at measurement location i, micrograms per cubic meter ([MICRO]g/m3 ).
MFCi = The measured fenceline concentration at measurement location i, [MICRO]g/m3.
NFSi = The near-field source contributing concentration at measurement location i determined using the additional measurements and calculation procedures included in the site-specific monitoring plan, [MICRO]g/m3 . For monitoring locations that are not included in the site-specific monitoring plan as impacted by a near-field source, use NFSi = 0 [MICRO]g/m3 .
40 C.F.R. §63.7792