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.i <br /> Specifications <br /> Standard Tank Notes <br /> 1. The primary tank's standard pipe fittings are 4" NPT half couplings. All tanks include one manway with <br /> three or more primary tank fittings in the cover. All other primary tank fittings are mounted on the tank. <br /> tC; <br /> Additional manways and tank fittings are available on a made-to-order basis. a <br /> Cc <br /> 2. Tank bottom deflector plates are standard under every manway and primary tank fitting. a <br /> 3. An optional fiberglass reservoir for leak monitoring can be integrally bonded to the top of all <br /> 6' diameter and larger double-wall tanks. It includes a 4" NPT half-coupling fitting mounted on top of the <br /> reservoir, which allows access to the cavity between the inner and outer tank walls. On 6' diameter and <br /> larger tanks with an optional fiberglass reservoir, the reservoir is positioned over the normal monitor <br /> fitting position and the tank will not include a separate monitoring fitting. The rib under the reservoir is • <br /> hollow if the annular space is not factory filled with monitoring liquid. <br /> 4. For all double-wall tanks without a reservoir, a 4" NPT annular space fitting is included on the top of the <br /> tank for monitoring. It permits access to a hollow rib which accommodates the installation of liquid <br /> sensors. • <br /> 5. Fiberglass reservoirs are not included on 4' diameter tanks. A contractor-supplied 4" diameter riser pipe • <br /> must be inserted into the 4"diameter annular space fitting to serve as the tank's reservoir. This riser pipe <br /> must be at least 2" longer than the electronic sensor. <br /> 6. All primary tanks must be vented. They are <br /> intended to be operated with fluid levels no <br /> higher than the tank top. Fiberglass tanks <br /> are designed to be operated at atmospheric <br /> pressure only — except when using vapor- �E <br /> recovery systems—provided the pressure or : <br /> vacuum does not exceed 1 psi on the <br /> primary tank. Over-pressurizing the primary <br /> tank will result in tank failure. When venting <br /> the monitoring cavity between the inner and <br /> outer tank, it must be vented independently <br /> from the primary tank (annular space <br /> venting is required for all hydrostatically <br /> monitored tanks). <br /> See pages 14-22 for standard tank data and <br /> configuration. <br /> ;f <br /> - -- - 13 <br />