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, 3 . <br /> The pump installed will need to dcliur 45 gallons per minute with a head of at least 20 feet. <br /> An alarm device shall be installed to warn of pump failure. Install the pump control and a <br /> Meyers, Model D.L.V. Audio Visual, Lo-Voltage alarm system or approved equal in a <br /> conspicuous place at the direction of the owner. <br /> Dosing Volume = 25% of 500 g.p.d. = 125 gallons, <br /> DRAINFIELD ROCK REQUIRED: <br /> Based on 12,5 inches of rock, 19 cubic yards of rock would be required, <br /> SAND REQUIRED: <br /> Approximately 255 cubic yards of clean sand for under mound is needed. <br /> NOTES: <br /> A. Please sec site plan layout, <br /> B. Typical sections for construction follow, <br /> C-7 <br /> E-3&4 <br /> E-6 <br /> E-12 <br /> F-7 <br /> PAGE 5 <br />