Pit & Quarry, July 2012

Noise barriers can be walls earth berms stockpiled materials or vegetative plantings Vegetated earth berms are as common a fixture in Memphis Stone and Gravels operation as the front end loader Berms are placed around the perimeter of the operation to serve as a visual screening device as well as an effective noise controller Earth berms can reduce noise by as many as 3 decibels more than a wall constructed at about the same height Similar to berms strategically placed stockpiles can be effective Memphis Stone and Gravel has measured up to a 30 percent reduction in decibel levels by placing stockpiled materials in front of noise sources Trees planted in rows are typically used more for aesthetic purposes than for noise control However a wide strip of trees with very thick undergrowth can lower noise levels Memphis Stone and Gravel typically selects evergreen trees that have fast growth The Federal Highway Administration suggests 30 meters of dense vegetation can reduce noise by 5 decibels Reduce noise sources Noise source reduction can involve something as simple as replacing a squeaky conveyor idler or an economic decision to eliminate an activity generating excessive noise The idea could be a relatively simple one but it still may require a culture change within the organization Management for example should be proactive in communicating a philosophy that noise reduction has tangible benefits to the company even when it is not related to safety Until recently Memphis Stone and Gravel had limited options for noise source reduction Fortunately for the company its situation has improved now that its using broadband backup alarms Back in 2005 Memphis Stone and Gravel launched an aggressive campaign to retrofit much of its mobile equipment with broadband directional backup Slurry Pumps LCC Pump Metal Its the industrys fi rst choice for boosting productivity and profi ts With high performance Corbrasion resistance the GIW LCC Pump family is engineered and tailored to withstand the most severe slurry applications GIW LCC Metal Rubber design features include Corbrasive resistant wet end parts advanced hydraulic design single wall hard metal shell rubber lined and construction from durable extra heavy hard metal Contact your local GIW representative to learn more about the complete line up of LCC Pumps GIW Industries Inc ULJKWVERUR 5G URYHWRZQ 86 7HOHSKRQH D ZZZ JLZLQGXVWULHV FRP A 6 RPSDQ Providing exceptional products backed by professional service and advice GIW Industries and ISCO Industries have partnered to meet your entire pump and piping needs call for your project solution today PUMP IT PIPE IT Total Piping Solutions HDPE When you need it Where you need it Nobody stocks or delivers more HDPE pipe and associated products than ISCO Where ever your project ISCO is usually a shipment day away from most sites with 21 strategically placed sales service and or stocking sites across the U S and now in Canada and Australia We also stock a full line of mechanical connections and molded and fabricated fi ttings backed by seasoned HDPE experts ready to consult on your project ISCO Industries D WHU YH RXLVYLOOH 86 7HOHSKRQH D ZZZ LVFR SLSH FRP www pitandquarry com July 2012 PIT QUARRY 17