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Page 124 <br /> 6.4.4 EXHIBIT D - Extraction Plan <br /> Plant and material processing activity will divide materials into diverse and <br /> dynamic product stockpiles that will come and go with unpredictable <br /> variations in sale and production. To the extent possible, product material <br /> will surround plant activities to further lessen visual and noise impacts to <br /> surrounding properties. <br /> Plant placement will assure that plant noise is well below that of the nearby <br /> traffic. Relative to noise, traffic travelling on area roads at 5 5 mph or above is <br /> approximately 70.0± decibels within 100 feet from the centerline of the <br /> Highway. Noise at ground zero at a cone crusher, as measured by a hand- <br /> held meter, is at 80.0± decibels, dropping to 70.0± decibels at I00.0± feet from <br /> the center. The level drops an additional 5.0± decibels for every 100.0± feet <br /> from the center of the crusher and surrounding plant noise, achieving <br /> residential background levels at a total setback of 400± feet. <br /> Backup sirens and heavy equipment averaged 60.0± to 75± decibels, with <br /> similar decreases in decibel readings from the source measured in a manner <br /> similar to that indicated for the crusher and plant equipment sources. Plant <br /> stockpiles will aid muting of plant sourced noise just as noise levels at areas <br /> of extraction are buffered with increasing depth of extraction. <br /> The location of the portable scale and scale house and correlated internal <br /> traffic at the plant site location will vary depending upon production levels <br /> and areas needed for product stockpiling. Regardless, the scale house will be <br /> located along internal paths for haul trucks, where finished material will be <br /> weighed and disembarked to help build the urban matrix of roads, highways, <br /> foundations, and desirable neighborhoods communities most desire. <br /> For a diverse list of products to be extracted and/or processed, and sold, they <br /> may include but are not limited to the more common products identified <br /> under Table DI - Earth Products, or other inert or commonly useful products <br /> used for diverse construction purposes, including, but not limited to: structural <br /> fill, concrete products, road construction products; and other products to aid <br /> the residential, commercial, industrial customer; and for any other <br /> infrastructure use. Explosives - will not be utilized. <br /> VARRA COMPANIES, INC. TWO RIVERS SAND GRAVEL AND RESERVOIR PROJECT MARCH 2O22 <br /> A REGULAR IMPACT[1121 CONSTRUCTION PERMIT APPLICATION-COLORADO DIVISION OF RECLAMATION MINING&SAFETY <br /> OFFICE OF MINED LAND RECLAMATION <br />