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2.3 <br />Figure 1 — ADD Diurnal Curve <br />2 <br />1.8 <br />1.6 <br />cp • 1.4 <br />w 1.2 <br />>. 1 <br />0 0.8 <br />o • - 0.6 <br />0.4 <br />0.2 <br />0 <br />ADD Diurnal Curve <br />1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 <br />Hour <br />Figure 2— MDD Diurnal Curve <br />1.4 <br />1.2 <br />( 1 <br />E <br />• 0.8 <br />.( 0.6 <br />0 <br />o • - 0.4 <br />0.2 <br />0 <br />MDD Diurnal Curve <br />1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 <br />Hour <br />Existing System Available Flow for Fire Protection <br />Designing a water system to provide adequate fire protection is an important consideration. <br />Adequately sized watermain is an important consideration to supply desired fire flows. <br />Guidelines for determining fire flow requirements are provided by the ISO. ISO is the insurance <br />service organization responsible for evaluating and classifying municipalities for fire insurance <br />rating purposes. Available fire flow for fire protection (fire flow) in this report is defined as the flow <br />capacity at a point in the water distribution system which causes the pressure to fall to 20 psi <br />(residual pressure). A map of the fire flow analysis for the distribution system under a maximum <br />day demand is shown in Figure 8 in Appendix B. Note that the fire flow analysis for the <br />FEASIBILITY STUDY - DRAFT RAMSY 154354 <br />Page 6 <br />