419.3(k) 419.3(p) will only be opened by the District M aterials Representative. For quality control purposes, a maximum of one pavement core per sublot may be obtained unless the Representative allows additional cores. No cores may be taken by the Contractor after the acceptance cores are obtained. Do not obtain any other pavement cores, except those that are directed by and surrendered to the Department, unless allowed in writing by the District Executive . 1.b. IA Density Samples. The Department will perform IA testing of HOLA density samples on the initial lot and a minimum of one out of every ten lots thereafter. The Representative will identify one HOLA sample as specified in Section 419.3(k)1 .a to also serve as an IA sample. Cores coated with paraffin wax according to PTM No. 716 are omitted from IA testing. With the Representative present, identify the samples by ECMS project number, lot and sublot number, location (station and offset), date of placement, mixture type, and as AS/IA samples. Provide the daily theoretical maximum specific gravity value as specified in Section 419.3(i)2. b for the density calculation of the lot. Immediately after identifying, submit the density samples to the Representative as specified in Section 419.3(k)1.a. Upon testing of the sample for HOLA density as specified in Section 419.3 (i)2.c.1, the Representative will package the density IA samples in the containers and submit the IA samples to LTS for testing.
1.b.1. LTS Testing of IA HOLA Density Samples. The LTS will test the density samples for IA according to PTM No. 715, and if necessary PTM No. 716, to determine the percent compaction.
1.b.1.a Density IA Sample Test Result Analysis. LTS IA density sample test results will be compared to the HOLA density sample test results on the same lot. If the difference in the average test results of the HOLA and IA meet the IA tolerances in Table H , the Department will continue with IA testing at a minimum of one out of every ten lots thereafter.
TABLE H Independent Assurance Tolerances on Lot Averages Testing Criteria Max. Difference Between Test Results (n≥3) PTM No. 715 or PTM No. 716, Gmb 0.020 AASHTO T 209 as modified in Bulletin 27 0.030
If the difference between the lot averages of IA sample test results and HOLA sample test results exceeds the maximum IA tolerances in Table H , the Representative will perform an investigation as to the cause for the non- comparison of the test results. Provide information to the Representative, as requested, on the integrity of samples and on the equipment used in the sample testing. The Representative will also review personnel and test methods used in the HOLA testing. Implement corr