Laserfiche WebLink
�. . ..- -- - �'.`�'�- <br />December 23,2004 <br />Memo to: The File <br />From: Scott Spisak <br />Re: Pavement Recycle Crushing Vibration Monitoring <br />On November 3 0, 2 D44, we engaged American Engineering testing, Inc. (A.E.T.) to <br />perform vibration monitoring of Intex Corporation's e�sl�ing equipment that was <br />recyclingpavement at our Johnson Pit at 12500 Rich Valley Bl�d. in Rosemount. The <br />monitoring was performed on December2,2004. <br />There were no other operations being conducted on the property that day. Intex <br />equipment included a CAT 9$$F Wheel Loader, a jaw type prim� crusher, a cone type <br />secondary crusher with vibratory screens, a trailer enclosed diesel generator and several <br />belt conveyors to trans#�e�r material from the primary crusher, th�roug,�. the secondary <br />crusher onto the stockpile. <br />The test results (sce report attached) show that at a distance of 100 feet, vibrations would <br />have to double or triple to even register above 0.1 PPV (in/s} on the U.S. Bureau of <br />Mines Alternative Blasting Level Criteria Table. Vibrations would have to increase at <br />least ten times to reach levels that may damage plaster buildings and about thirteen times <br />to reach levels that may damage dry wall. <br />In more than 15 years of pavement recycling in urban areas, we have had no complaints <br />about vibration. <br />