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• The final monitoring unit will be placed perpendicular to each blast at or near the <br /> nearest property line. <br /> All blast monitoring will be completed by a blasting consulting firm that specializes in <br /> blast monitoring. Monitoring records will be kept onsite for each blast and will include: <br /> • The name of the person and monitoring firm recording and analyzing the <br /> seismographic record. <br /> • The type and manufacturer of the instrument <br /> • Sensitivity of the instrument <br /> • The date and certification of the last calibration of the instrument <br /> • The exact location of the instrument including the date, time, and distance from <br /> the blast <br /> • The recorded value of the peak particle velocity and air over pressure. <br /> Flyrock Control Plan: <br /> Flyrock is defined as dirt, mud, stone, or fragmented rock that is propelled from the <br /> blasting area by the force of the blast. Flyrock is never expected in a blast, but due to the <br /> nature of explosives it can happen. Flyrock can be minimized and eliminated by <br /> following the basic blasting guidelines below. Transit Mix Concrete Co. adheres to these <br /> guidelines for all blasting completed onsite. <br /> • Proper blast pattern design including proper burden and spacing based on hole <br /> size and by ensuring there is adequate space in front of the pattern to allow <br /> fractured material to move horizontally. <br /> • Proper blast hole loading, ensuring hole quality is adequate and explosive column <br /> height and stemming material heights meet calculated requirements for safety. <br /> • Setting up blast patterns so that the direction of the blast will be away from <br /> permanent manmade structures, and away from adjacent permit boundaries. <br /> • Using appropriate blast pattern timing sequences so the pattern is shot <br /> systematically and in proper order. <br /> Documentation: <br /> The third parry blasting contractor will prepare a paper record of each blast that is <br /> completed at the quarry. Copies of each blast report will be kept on file in the scale <br /> house/office building for reference. All records, including blast statistics and blast <br /> monitoring, will be kept on file for a minimum of 3 years. Forms to be used for data <br /> collection will be the same or similar to the example form shown on the following pages. <br />