Hot water is to be pumped out of an underground geothermally heated aquifer located $500 \mathrm{ft}$ below ground level. The temperature and pressure in the aquifer are $325^{\circ} \mathrm{F}$ and $150 \mathrm{psig}$. The water is to be pumped out at a rate of $100 \mathrm{gpm}$ through $2.5 \mathrm{in}$. pipe using a pump that has a required NPSH of $6 \mathrm{ft}$. The suction line to the pump contains four $90^{\circ}$ elbows and one gate valve. How far below ground level must the pump be located in order to operate properly?