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. <br /> M autanatic �hut-off dav:ce ehall t» inetalled that �top� <br /> the flow of product baing dQliver�d to the undorqround <br /> �toraqa tank when the undsrqround tank ie full. <br /> 4.7.5.4 Abova-Ground Storaqe Tanke <br /> 1lbova-qround atoraqa tanke ehsll ba placed in � bwrmod, <br /> imparviou• araa. Tha bermed area �hsll be pavW with <br /> Portland o�nt conarot� for permanent inetallation�. Th� <br /> bermed ar�a �hall be larqa ano�qh, and the b�rm� high <br /> enouqh, to contain 110 peraent of the largeet tank'• total <br /> � <br /> voluma or 10t of the total tank volume, which�var i� <br /> largeot. <br /> An outlet ehsll be provided from the bermed area to allow <br /> drainage of accumulatQd rain water. The outlet shall be <br /> �quipped with a manually operated valve that ehall be kapt <br /> in the cloeed poeition ezcept when the srea ie beinq drain�d <br /> of accumuleked rain water. Accumulated rsin wnter �hall b� <br /> ralsased frequently during the wet eeaeon. <br /> Ona of the followinq iteme ehall be inetalled to pravant <br /> overfilling of the tanks an audible alarm eystem, trigqared <br /> by a liquid leval aenaor, to alert the operator when th� <br /> tank ha� beon filled to 95 pereent capecityj or an �utanatic <br /> ahut-off device thet atope the flow of product b�inq <br /> delivered to the atorage tank when the tenk ia full. <br />