BPI L
= Bituminous Price Index, as published by the Department for the month prior to the letting, $/ton. = Percent of virgin Asphalt Cement in the Quality being adjusted. For HMA mixtures, the % AC V will be determined from the adjusted job mix formula. For bituminous materials applied, a performance graded or cutback asphalt will be considered to be 100% AC V and undiluted emulsified asphalt will be considered to be 65% AC V.
%AC V
Q
= Authorized construction Quantity, tons.
Basis of Payment. Bituminous materials cost adjustments may be positive or negative but will only be made when there is a difference between the BPI L and BPI P in excess of five percent as calculated by:
Percent Difference = {(BPI L – BPI P ) ÷ BPI L } x 100
Bituminous material cost adjustments will be calculated for each calendar month in which applicable bituminous materials are placed. The contract amount will amended via change order accordingly.
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