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Active quarry operations use a variety of equipment and techniques to dislodge, secure, ... quarries may or may not be located next to rock and sand processing plants. substantial ... grading - ap-42, (tables 11.9-1 & 11.9-2, 1/95) 0.8 lbs / vehicle mile traveled.Aggregate crushing and washing plants. mobile aggregate sand screening and washing plant . quality washing systems specialising in sand washing plant for the quarrying, sand gravel and recycling aggregate industries dwp mobile washing plant produces up to 5 products in one fully portable screen. complete gravel sorting and washing plant crushing new used sand washing.