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Attachment C HOLEPLUG° . _ . - . . Graded Sodium Bentonite Description HOLEPLUG°naturally occurring Wyoming sodium bentonite clay is a sized and graded chip material used to seal and plug earthen boreholes. HOLEPLUG bentonite is available in two particle size grades: • HOLEPLUG°3/4" bentonite (100% of particles pass through 3/4" screen; all particles retained on 3/8"screen) • HOLEPLUG°3/8" bentonite (100% of particles pass through 3/8"screen; all particles retained on 1/4"screen) Applications/Functions The use of HOLEPLUG sodium bentonite assists or promotes the following: • Grouting annulus in all types of wells, particularly environmental monitoring well applications • Sealing above gravel packs • Plugging decommissioned boreholes • Stemming shotholes • Sealing around conductor pipe • Sealing lost circulation zones • Shutting off artesian flow Advantages Helps prevent entry of surface water into boreholes • High swelling potential • In situ swelling to provide a superior seal with excellent casing stabilization • Easier to apply than pellets • Cost effective • Simple to apply, mixing not required • Helps prevent vertical movement of fluids in the hole between porous zones • Helps form a permanent, flexible downhole seal • Helps allow hole re-entry • Rehydratable • NSF/ANSI Standard 60 certified Typical Properties Volume of 50-lb (22.7 kg)sack HOLEPLUG 3/4" bentonite 0.73 ft3 or 0.027 yd3 or 0.021 m3 HOLEPLUG 3/8" bentonite 0.70 ft3 or 0.026 yd3 or 0.020 m3 Permeability 1.5 x 10-9 cm/sec (in fresh water) Appearance Beige to tan chips ©Copyright 2012 Halliburton HOLEPLUG is a registered trademark of Halliburton Rev.1112912012 Because the conditions of use of this product are beyond the seller's control,the product is sold without warranty either express or implied and upon condition that purchaser make its own test to determine the suitability for purchaser's application. Purchaser assumes all risk of use and handling of this product.This product will be replaced if defective in manufacture or packaging or if damaged. Except for such replacement,seller is not liable for any damages caused by this product or its use. The statements and recommendations made herein are believed to be accurate. No guarantee of their accuracy is made,however.