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a <br /> 1.09 CONSTRUCTION SEQUENCE <br /> A. The monitoring well shall be completed in the following sequential order. <br /> 1. The Contractor shall drill the borehole and construct the monitoring well as <br /> described in Sections 3.02 and 3.03. <br /> 2. The Contractor shall wait a minimum of 24 hours after well installation <br /> before commencing well development as described in Section 3.04. <br /> 3. The Contractor shall install the surface completion features consisting of the <br /> concrete pad and steel guard posts as described in Section 3.06. <br /> PART 2 - PRODUCTS <br /> 2.01 WELL CASING <br /> A. The well casing shall be constructed of 2-inch diameter, schedule 40, threaded <br /> polyvinylchloride(PVC) casing. <br /> 2.02 WELL SCREEN <br /> A. The 10-foot long well screen shall be constructed of 2-inch diameter, schedule 40, <br /> threaded PVC casing with 0.02-inch machine cut slots. A threaded cap shall be <br /> attached to the bottom of the screen. <br /> 2.03 SAND PACK <br /> A. The sand pack material shall consist of clean well rounded of number 2 x 12 sand, <br /> and shall be free of debris or organic impurities. <br /> 2.04 BENTONITE SEAL <br /> A. The bentonite seal shall consist of sodium montmorillonite clay in either the pellet <br /> or chip form. <br /> 2.05 NEAT CEMENT SEAL <br /> A. The neat cement seal shall consist of a mixture of Portland cement with not more than <br /> seven gallons of clean water per sack (one cubic foot or 94 pounds) of cement. <br /> Corral Hollow EMP WP.DOC Page 3 of 8 February 28,2007 <br />