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334 -6 . 2 Certification by the Contractor : On Asphalt Work Category 1 construction , the Engineer will accept the mix on the basis of visual inspection . Submit a Notarized Certification of Specification Compliance letter on company letterhead to the Engineer stating that all material produced and placed on the project was in substantial compliance with the Specifications . The Engineer may run independent tests to determine the acceptability of the material . 334 -6 . 3 Certification and Quality Control Testing by the Contractor : On Asphalt Work Category 2 construction , submit a Notarized Certification of Specification Compliance letter on company letterhead to the Engineer stating that all material produced and placed on the project was in substantial compliance with the Specifications , along with supporting test data documenting all quality control testing as described in 334 -6 . 3 . 1 . If so required by the Contract , utilize an Independent Laboratory as approved by the Engineer for the quality control testing . The mix will also require visual acceptance by the Engineer . In addition , the Engineer may run independent tests to determine the acceptability of the material . 334 -6 . 3 . 1 Quality Control Sampling and Testing Requirements : Perform quality control testing at a frequency of once per day . Obtain the samples in accordance with FDOT Method FM 1 -T 168 . Test the mixture at the plant for gradation ( P-$ and P-200 ) and asphalt binder content ( Pb ) . Test the mixture on the roadway for density using six- inch diameter roadway cores obtained at a frequency of three cores per day . Determine the asphalt content of the mixture in accordance with FM 5 - 563 . Determine the gradation of the recovered aggregate in accordance with FM 1 -T 030 . Determine the roadway density in accordance with FM 1 -T 166 . The minimum roadway density will be based on the percent of the maximum specific gravity ( Gmm ) from the approved mix design . If the Contractor or Engineer suspects that the mix design Gmm is no longer representative of the asphalt mixture being produced , then a new Gmm value will be determined from plant- produced mix with the approval of the Engineer . Roadway density testing will not be required in certain situations as described in 334-6 . 4 . 1 . Assure that the asphalt content , gradation and density test results meet the criteria in Table 334 -3 . Table 334 -3 Quality Control and Acceptance Values Characteristic Tolerance Asphalt Binder Content ( percent ) Target ± 0 . 55 Passing No . 8 Sieve ( percent ) Target ± 6 . 00 Passing No . 200 Sieve ( percent ) Target ± 2 . 00 Roadway Density (average of three cores 91 . 5 % Gmm Roadway Density an single core 90 . 0 % Gmm 334 -6 . 4 Quality Control Testing by the Contractor and Acceptance Testing by the Engineer : On Asphalt Work Category 3 , perform quality control testing as described in 334 - 6 . 3 . 1 . In addition , the Engineer will accept the mixture at the plant with respect to gradation ( P -8 and P-200 ) and asphalt binder content ( Pb ) . The mixture will be accepted on the roadway with respect to density . The Engineer will sample and test the material as described in 334- 6 . 3 . 1 . The Engineer will randomly obtain at least one set of samples per day . Assure that the asphalt content , gradation and density test results meet the criteria in Table 334 -3 . Material failing to meet these acceptance criteria will be addressed as directed by the Engineer . 334-6 . 4 . 1 Acceptance Testing Exceptions : When the total quantity of any mix type in the Project is less than 500 tons , or on Asphalt Work Category 1 construction , the 39 Technical Specifications F :\Public Works\ENGINEERING DIVISION PROJECTS\0744-8th St-US1 to 6th Ave\Admim\bid documents\0744 CONTRACT DOCUMENTS\Technical Specifications .doc