Mount LMI pump on shelf above acid shipping container for direct feed into treated line (see Figure 2).

For low rate feed position pump below acid container (see Figure 3).

For varying flow rates, use LMI pump in conjunction with a flowmeter for an automatic proportional feed system (see Figure 4).  If feed rate is so low as to make feeding acid full strength impractical, dilution of acid should be considered (unless prohibited by state regulations).