S e c t i o n 1 5 - P a g e 4 May 2013 HOLEPLUG ® Graded Sodium Bentonite Description HOLEPLUG is a naturally occurring Wyoming sodium bentonite clay that is a sized and graded chip material used to seal and plug earthen bor eholes. HOLEPLUG is available in two particle size grades: • HOLEPLUG " (100of particles pass thr ough " scr een; all particles r etained on 3 / 8 " scr een) • HOLEPLUG 3 / 8 " (100of particles pass thr ough 3 / 8 " scr een; all particles r etained on a " scr een) Applications/Functions • Highly r ecommended for use in gr outing annulus in all types of wells, particularly envir onmental monitoring well applications • Seal above gravel packs • Plug decommissioned bor eholes • Stemming shotholes • Seal ar ound conductor pipe • Seal lost cir culation zones • Shut o ff artesian fow Advantages • Pr events entry of surface water into bor eholes • High swelling potential • In situ swelling to pr ovide a superior seal with excellent casing stabilization • Easier to apply than pellets • Cost ef fective • Simple to apply , mixing not r equir ed • Pr events vertical movement of fuids in the hole between por ous zones • Forms a permanent, fexible downhole seal • Allows hole r e-entry • Rehydratable • NSF/ANSI Standar d 60 certifed Recommended T r eatment Plugging and Stemming Drill Holes Due to shipping and handling, a small amount of fne bentonite particles may be pr esent. For optimum r esults, HOLEPLUG ® should be pour ed over a mesh or scr een with " (6.4 mm) openings to “sift out” the smaller particles. The scr een should be lar ge enough (appr ox. 1 yd 2 or 1m 2 ) to be folded into a “V” shape to allow sifting while the pr oduct is being pour ed into the hole. Also, HOLEPLUG should be pour ed slowly . Allow appr oximately two minutes to pour a 50-lb (22.7 kg) bag. www .dsiundergr ound.com