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  <br />  <br />CITY OF SUNNY ISLES BEACH SECTION 03200 - 2 <br />WELL CASING <br />  <br />F. Casing liner connections shall meet manufacturer specifications for water tightness. <br />Connections shall have equal strength as the casing itself. <br /> <br />2.2 POLY VINYL CHLORIDE (PVC) LOCK COUPLING CASING <br /> <br />A. Lock coupling casings, couplings and bushings will be Certainteed Certa-Lok SDR 17 <br />locked coupling PVC casing or equivalent. Any equivalent casing selected must be <br />shown to have sufficient joint and tensile strength, internal pressure rating, resistance to <br />collapse and ability to withstand all stresses of construction. Any alternates must be <br />approved in advance by the ENGINEER. <br /> <br />B. All casing liners shall be clearly marked with type, grade and manufacturer. If required <br />by the ENGINEER, the CONTRACTOR will provide additional backup supporting <br />documentation from the Manufacturer. <br /> <br />C. Casing liner elevators must be approved by the ENGINEER. <br /> <br />D. Only the PVC manufacturer approved joint compound will be used for pipe assembly. <br />The joint compound will be approved for water well construction. <br /> <br />E. Only Certainteed Certa-Lok splines will be used with Certa-Lok couplings. The <br />CONTRACTOR shall provide a copy of the installation and connection procedure on <br />site for review prior to casing assembly. Only a Certa-Lok concentric reducer bushing <br />will be used to connect 20” PVC casing liner. The reducer bushing shall have strength <br />equal to or greater than the couplings. <br /> <br />F. Final PVC well casing liner shall be completed as specified by the OWNER. <br /> <br />2.3 CENTERING GUIDES <br /> <br />A. Casing centering guides (centralizers) shall be placed on all casing liner strings, prior to <br />installation, at 30 feet intervals with the first set of centralizers placed within 5 feet from <br />the bottom of the casing. Centralizers shall be fixed to the casing liner at coupling <br />locations. <br /> <br />B. Centralizer material will be steel when attached to carbon steel, and stainless steel <br />when attached to stainless steel and PVC casing. Guides will be welded when attached <br />to steel; and steel strapped to PVC. <br /> <br />