COMPLIANCE INFO_1998-2003 - Laserfiche WebLink

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• • 0 • Standard Tank Notes # f 0 1. The primary tank's standard pipe fittings are 4" NPT half couplings. All tanks include one manway with three or more primary tank fittings in the cover. All other primary tank fittings are mounted on the tank. Additional manways and tank fittings are available on a made-to-order basis. 2. Tank bottom deflector plates are standard under every manway and fitting. 3. An optional fiberglass reservoir for leak monitoring can be integrally bonded to the top of all 6' -diameter and larger Double -Wall Tanks. It includes a 4" NPT half -coupling fit- ting mounted on top of the reservoir, which allows access to the cavity between the inner and outer tank walls. On 6' diameter and larger tanks with an optional fiberglass reservoir, the reservoir is positioned over the normal monitor fitting position and the tank will not include a separate monitoring fitting. The rib under the reservoir is hollow if the annular space is not factory filled with monitoring liquid. 4. For all double-wall tanks without a reservoir, a 4" NPT annular space fitting is included on the top of the tank for monitoring. It permits access to a hollow rib which accommodates the installation of liquid sensors. 5. Fiberglass reservoirs are not included on 4' diameter tanks. A contractor -supplied 4" diameter riser pipe must be inserted into the 4" diameter annular space fitting to serve as the tank's reservoir. This riser pipe must be at least 2" longer than the electronic sensor. 6. All primary tanks must be vented. They are intended to be operated with fluid levels no higher than the tank top. Fiberglass tanks are designed to be operated at atmospheric pressure only — except when using vapor -recovery systems — provided the pressure or vacuum does not exceed 1 psi on the primary tank. Over -pressurizing the primary tank will result in tank failure. When venting the monitoring cavity between the inner and outer tank, it must be vented independently from the primary tank (annular space venting is required for all hydrostatically monitored tanks). See pages 14-22 for standard tank data and configuration.