The bituminous material shall conform to Section 702 of the "Standard Specifications for Road and Bridge Construction" adopted by the Montana State highway Commission. a. Aggregate: The aggregate shall meet the requirements of Section 401.02.1 and Section 701.03.2 table 701-15 Grade B of the "Standard Specifications for Road and Bridge Construction", Montana State Highway Commission. In addition the mix shall meet an index of 70 for retained strength as determined by ASTM D 1075 EFFECT OF WATER ON COHESION OF COMPACTED BITUMINOUS MATERIAL. b. Bituminous Material: The bituminous material shall be the type and grade specified and shall meet the requirements of Section AASHTO M 320-05. The contractor will furnish the City of Missoula a job mix formula based upon a certified laboratory test, sieve analysis and grading and character of the aggregate including ASTM D 1075, furnished within the specification limits. c. Mineral Filler: The mineral filler for use in the construction of hot plant mix, bituminous surfacing shall not exceed 15% of the material retained on a No. 4 sieve. The materials shall be in conformance with Section 401.02.4 "Mineral Filler", of the "Standard Specifications for Road and Bridge Construction", Montana State Highway Commission. d. Performance Grade Asphalt Binder (PGAB): Performance grade asphalt binder shall be used as standard for all mix designs, PG 64-28 or PG 58-28, meeting requirements of Section 702 and table 702-9 "Standard Specifications for Road and Bridge Construction", Montana State Highway Commission. The successful bidder shall provide an asphalt cement mix design prior to plant start-up each year of if asphalt cement type changes during the course of contract. Mix designs shall be submitted to the Street Division Superintendent.