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In addition, all equipment may be subjected to calibration verification or other inspection by the qualifying <br />authority. <br />7.4 Calibration Standards and Frequencies for Laboratory Equipment <br />The standards for calibration and the frequencies for laboratory equipment calibrations are shown in <br />Tex - 198 -E, "Minimum Standards for Acceptance of a Laboratory for Soils and Flexible Base Testing;" <br />Tex - 237 -F, "Minimum Standards for Acceptance of a Laboratory for Hot Mix Testing;" and Tex - 498 -A, <br />"Minimum Standards for Acceptance of a Laboratory for Concrete and Aggregate Testing." <br />7.5 Frequency for Laboratory Qualification <br />Laboratories are qualified at an interval not to exceed three years. Calibration /verification is required <br />whenever the laboratory or equipment is moved. Equipment used in IA sampling and testing will be verified <br />at intervals not to exceed one year. <br />7.6 Non - Compliance <br />A laboratory that does not meet the above requirements is subject to disqualification. Any equipment in a <br />qualified laboratory failing to meet specified equipment requirements for a specific test method will not be <br />used for that test method. <br />7.7 Documentation <br />The LG and IA laboratory are responsible for verifying that laboratories are qualified to perform TOOT <br />testing. Documentation will be required to be kept by the qualified laboratory and LG /IA laboratory. <br />Calibration records will be maintained for three years, unless another agency requires a longer period. <br />7.8 Dispute Resolution <br />The next higher qualification authority will resolve disputes concerning calibration and verification of <br />equipment. For disputes that cannot be resolved at the district level, CST /M &P will be the final authority. <br />