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Summit Brick and Tile Company l=ox No 1 Clay Pit <br />M-1977-219 - Adequacy Response #4 Page 2 <br />60.2 Within the Blasting Plan, under Pre -Blast Survey Procedure (third paragraph), <br />please clarify the pre -blast survey will be conducted on areas one-half mile from <br />the entire new mining area prior to opening the new mining area. <br />This has been clarified at top of page 2 to indicate that the <br />survey will be done within one-half mile of the new "mining <br />area". <br />60.3 Within the Blasting Plan, under Blast Design and Layout (fifth paragraph), the <br />Division believes there is an error in regards to the distance to the closest <br />non -owned structure. Please revise this accordingly and provide further details <br />regarding which structure this is as well as the distance to this structure form the <br />active blasting versus the distance from the permit boundary. <br />I clarified it as an example for the current condition in Area A, <br />where the next blasting will take place on the west side of the <br />present mine face. <br />60.4 Please outline the nine mining areas on the Blasting Map. <br />A revised map is attached. <br />60.5 It appears the house owned by the Applicant, where the initial seismograph and <br />microphone will be placed is not included on the Blasting Map nor on the list of <br />houses within one-half mile. Although this is structure is owned by the applicant, <br />please update the map and list to include this house. <br />I added this house to the map and the name and address to the <br />list as you suggested. <br />60.6 The Division requests a map which shows the active Mining Area A which shows <br />the one-half mile buffer area and identifies the current houses which qualify for <br />the first Pre -Blast Survey. <br />Attached is a second map that is an excerpt from the Blasting Map <br />showing the mine area around Area A with the half -mile buffer <br />from the permit line imposed on it. It shows that there will be <br />three houses needing a survey completed before blasting takes <br />place in Area A again. It should be pointed out that blasting <br />has taken place on Area A in the past with no complaints or <br />adverse effects at these three structures. <br />