Asphalt Tack / Prime Coat Quantity
Emulsion gallons to order for a tack or prime coat: the DOT spec sets a residual (asphalt) rate but the truck meters emulsion, so the residue fraction grosses the order up. A 0.04 gal/sy residual over a 10,000 sf lane needs 74 gal of a 60%-residue emulsion, not the 44 the residual figure alone suggests.
Formula and source
area_sy = area_sf / 9; undiluted_gal_sy = residual_rate_gal_sy / (residue_pct / 100); emulsion_gallons = undiluted_gal_sy x area_sy; residual_gallons = residual_rate_gal_sy x area_sy.
Coverage identity by name (residual-to-emulsion gross-up); DOT tack/prime-coat application-rate practice.
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